CT SLIP RING MAIN. M..pdf

TechnicalPublications

Copyrighte 1998, 1999, 2000, 2001 by General Electric Company

Operating Documentation

2154943Revision 5

CT Slip Ring Maintenance Manual

GE MEDICAL SYSTEMS CT SLIP RING MAINTENANCE MANUAL

2154943

a

REV 3

� THIS SERVICE MANUAL IS AVAILABLE IN ENGLISH ONLY.

� IF A CUSTOMER’S SERVICE PROVIDER REQUIRES A LANGUAGE OTHER THANENGLISH, IT IS THE CUSTOMER’S RESPONSIBILITY T O PROVIDE TRANSLATIONSERVICES.

� DO NOT ATTEMPT TO SERVICE THE EQUIPMENT UNLESS THIS SERVICEMANUAL HAS BEEN CONSULTED AND IS UNDERSTOOD.

� FAILURE TO HEED THIS WARNING MAY RESULT IN INJURY TO THE SERVICEPROVIDER, OPERATOR OR PATIENT FROM ELECTRIC SHOCK, MECHANICAL OROTHER HAZARDS.

� CE MANUEL DE MAINTENANCE N’EST DISPONIBLE QU’EN ANGLAIS.

� SI LE TECHNICIEN DU CLIENT A BESOIN DE CE MANUEL DANS UNE AUTRELANGUE QUE L’ANGLAIS, C’EST AU CLIENT QU’IL INCOMBE DE LE FAIRETRADUIRE.

� NE PAS TENTER D’INTERVENTION SUR LES ÉQUIPEMENTS TANT QUE LEMANUEL SERVICE N’A PAS ÉTÉ CONSULTÉ ET COMPRIS.

� LE NON-RESPECT DE CET AVERTISSEMENT PEUT ENTRAÎNER CHEZ LETECHNICIEN, L’OPÉRATEUR OU LE PATIENT DES BLESSURES DUES À DESDANGERS ÉLECTRIQUES, MÉCANIQUES OU AUTRES.

� DIESES KUNDENDIENST–HANDBUCH EXISTIERT NUR INENGLISCHER SPRACHE.

� FALLS EIN FREMDER KUNDENDIENST EINE ANDERE SPRACHE BENÖTIGT, ISTES AUFGABE DES KUNDEN FÜR EINE ENTSPRECHENDE ÜBERSETZUNG ZUSORGEN.

� VERSUCHEN SIE NICHT, DAS GERÄT ZU REPARIEREN, BEVOR DIESESKUNDENDIENST–HANDBUCH NICHT ZU RATE GEZOGEN UND VERSTANDENWURDE.

� WIRD DIESE WARNUNG NICHT BEACHTET , SO KANN ES ZU VERLETZUNGEN DESKUNDENDIENSTTECHNIKERS, DES BEDIENERS ODER DES PATIENTEN DURCHELEKTRISCHE SCHLÄGE, MECHANISCHE ODER SONSTIGE GEFAHRENKOMMEN.

� ESTE MANUAL DE SERVICIO SÓLO EXISTE EN INGLÉS.

� SI ALGÚN PROVEEDOR DE SERVICIOS AJENO A GEMS SOLICIT A UN IDIOMA QUENO SEA EL INGLÉS, ES RESPONSABILIDAD DEL CLIENTE OFRECER UN SER VICIODE TRADUCCIÓN.

� NO SE DEBERÁ DAR SERVICIO TÉCNICO AL EQUIPO, SIN HABER CONSUL TADO YCOMPRENDIDO ESTE MANUAL DE SERVICIO.

� LA NO OBSERVANCIA DEL PRESENTE AVISO PUEDE DAR LUGAR A QUE ELPROVEEDOR DE SERVICIOS, EL OPERADOR O EL PACIENTE SUFRAN LESIONESPROVOCADAS POR CAUSAS ELÉCTRICAS, MECÁNICAS O DE OTRANATURALEZA.

WARNING

AVERTISSEMENT

WARNUNG

AVISO


2154943

b

REV 3

� ESTE MANUAL DE ASSISTÊNCIA TÉCNICA SÓ SE ENCONTRADISPONÍVEL EM INGLÊS.

� SE QUALQUER OUTRO SERVIÇO DE ASSISTÊNCIA TÉCNICA, QUE NÃO A GEMS,SOLICITAR ESTES MANUAIS NOUTRO IDIOMA, É DA RESPONSABILIDADE DOCLIENTE FORNECER OS SERVIÇOS DE TRADUÇÃO.

� NÃO TENTE REPARAR O EQUIPAMENTO SEM TER CONSULTADO ECOMPREENDIDO ESTE MANUAL DE ASSISTÊNCIA TÉCNICA.

� O NÃO CUMPRIMENTO DESTE AVISO PODE POR EM PERIGO A SEGURANÇA DOTÉCNICO, OPERADOR OU PACIENTE DEVIDO A‘ CHOQUES ELÉTRICOS,MECÂNICOS OU OUTROS.

� IL PRESENTE MANUALE DI MANUTENZIONE È DISPONIBILESOLTANTO IN INGLESE.

� SE UN ADDETTO ALLA MANUTENZIONE ESTERNO ALLA GEMS RICHIEDE ILMANUALE IN UNA LINGUA DIVERSA, IL CLIENTE È TENUTO A PROVVEDEREDIRETTAMENTE ALLA TRADUZIONE.

� SI PROCEDA ALLA MANUTENZIONE DELL’APPARECCHIATURA SOLO DOPO AVERCONSULTATO IL PRESENTE MANUALE ED AVERNE COMPRES O IL CONTENUTO.

� NON TENERE CONTO DELLA PRESENTE AVVERTENZA POTREBBE FARCOMPIERE OPERAZIONI DA CUI DERIVINO LESIONI ALL’ADDETTO ALLAMANUTENZIONE, ALL’UTILIZZATORE ED AL PAZIENTE PER FOLGORAZIONEELETTRICA, PER URTI MECCANICI OD ALTRI RISCHI.

ATENÇÃO

AVVERTENZA


2154943

c

REV 3

IMPORTANT! . . . X-RAY PROTECTION

X-ray equipment if not properly used may cause injury . Accordingly , the instructions herein contained should bethoroughly read and understood by everyone who will use the equipment before you attempt to place thisequipment in operation. The General Electric Company, Medical Systems Group, will be glad to assist andcooperate in placing this equipment in use.

Although this apparatus incorporates a high degree of protection against x-radiation other than the useful beam, nopractical design of equipment can provide complete protection. Nor can any practical design compel the operator to takeadequate precautions to prevent the possibility of any persons carelessly exposing themselves or others to radiation.

It is important that everyone having anything to do with x-radiation be properly trained and fully acquainted with therecommendations of the National Council on Radiation Protection and Measurements as published in NCRP Reportsavailable from NCRP Publications, 7910 Woodmont Avenue, Room 1016, Bethesda, Maryland 20814, and of theInternational Commission on Radiation Protection, and take adequate steps to protect against injury.

The equipment is sold with the understanding that the General Electric Company, Medical Systems Group, its agents, andrepresentatives have no responsibility for injury or damage which may result from improper use of the equipment.

Various protective material and devices are available. It is urged that such materials or devices be used.

��

All electrical installations that are preliminary to positioning of the equipment at the site prepared for the equipment shall beperformed by licensed electrical contractors. In addition, electrical feeds into the Power Distribution Unit shall be performed bylicensed electrical contractors. Other connections between pieces of electrical equipment, calibrations, and testing shall beperformed by qualified GE Medical personnel. The products involved (and the accompanying electrical installations) are highlysophisticated, and special engineering competence is required.

In performing all electrical work on these products, GE will use its own specially trained field engineers. All of GE’s electricalwork on these products will comply with the requirements of the applicable electrical codes.

The purchaser of GE equipment shall only utilize qualified personnel (i.e., GE’s field engineers, personnel of third-party servicecompanies with equivalent training, or licensed electricians) to perform electrical servicing on the equipment.


2154943

d

REV 3

DAMAGE IN TRANSPORTATION

All packages should be closely examined at time of delivery. If damage is apparent, have notation “damage in shipment ”written on all copies of the freight or express bill before delivery is accepted or “signed for” by a General Electricrepresentative or a hospital receiving agent. Whether noted or concealed, damage MUST be reported to the carrierimmediately upon discovery, or in any event, within 14 days after receipt, and the contents and containers held forinspection by the carrier. A transportation company will not pay a claim for damage if an inspection is not requested withinthis 14 day period.

Call Traffic and Transportation, Milwaukee, WI (414) 827–3449 / 8*285–3449 immediately after damage is found. At thistime be ready to supply name of carrier, delivery date, consignee name, freight or express bill number, item damaged andextent of damage.

Complete instructions regarding claim procedure are found in Section “S” of the Policy & Procedure Bulletins.

OMISSIONS & ERRORS

GE personnel, please use the GEMS CQA Process to report all omissions, errors, and defects in this documentation.Customers, please contact your GE Sales or Service represenatives.

CAUTION

Do not use the following devices near this equipment. Use of these devices near this equipment could causethis equipment to malfunction.

Devices not to be used near this equipment:

Devices which intrinsically transmit radio waves such as; cellular phone, radio transceiver, mobile radio transmitter,radio–controlled toy, etc.

Keep power to these devices turned off when near this equipment.

Medical staff in charge of this equipment is required to instruct technicians, patients and other people who may be aroundthis equipment to fully comply with the above regulation.


2154943

A

REV 5

REVISION HISTORY

REV DATE PRIMARY REASON FOR CHANGE

0 Apr. 1, 1996 Initial Release. . . . . . . . . 1 May. 20, 1996 Periodic changes. . . . . . . . 2 Jan. 1, 1997 Periodic changes. . . . . . . . . 3 Jun. 18, 1998 Periodic changes. . . . . . . . 4 June 14, 2000 The use of cleaning Pad is prohibited.. . . . . . . . 5 Apr. 20, 2001 Added KYOUEI Brush.. . . . . . . .

LIST OF EFFECTIVE PAGES

PAGE REV PAGE REV PAGE REV PAGE REV PAGE REV

Title page 5. . . . . . . . . . Warning Label(a to d) 3A 5. . . . . . . . . . . . . . . . . . B blank. . . . . . . . . . . . . . i to ii 5. . . . . . . . . . . . . . .

Section 11–1 to 1–6 5. . . . . . . . . .

Section 22–1 to 2–5 5. . . . . . . . . . 2–6 blank. . . . . . . . . . . .

Section 33–1 to 3–13 5. . . . . . . . . 3–14 blank. . . . . . . . . . .

Section 44–1 to 4–56 5. . . . . . . . .

Section 55–1 to 5–19 4. . . . . . . . . 5–20 blank. . . . . . . . . . .

Section 66–1 to 6–12 4. . . . . . . . .

Tab APPENDIXA–1 to A–4 3. . . . . . . . .

Blank/Rear Cover –. . .


2154943

B

blank


2154943

i

REV 5

TABLE OF CONTENTS

SECTION PAGE

SECTION 1 – SLIP RING TYPE 1–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1–1 Distinction the Gantry covers among EMC100 type, EMC80 type and NO EMC type 1–21–2 Distinction the Ring between Panel type and Stainless type 1–3. . . . . . . . . . . . . . . . . . . . . 1–3 Distinction the Brush Assy between ETC/KYOUEI type and B.T.B type 1–4. . . . . . . . . . . 1–4 Distinction the Gantry Interface board between DTR board and DTR2 board 1–5. . . . . . 1–5 Distinction the Gantry Interface board among

STRR(early) board, STRR(late) board and STRR2 1–6. . . . . . . . . . . . . . . . . . . . . . . . . . . .

SECTION 2 – CAUTION and MAINTENANCE PROHIBIT ITEMS 2–1. . . . . . . . . . . . . . . . . . . . . 2–1 CAUTION 2–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2–2 MAINTENANCE PROHIBIT ITEMS 2–3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

SECTION 3 – MAINTENANCE 3–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3–1 MAINTENANCE CYCLE AND ITEMS 3–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3–2 SCATTERED POWDER CLEANING 3–2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3–3 SIGNAL SLIP RING CLEANING 3–4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3–3–1 Signal Slip Ring Wiping (Panel Type) 3–4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3–3–2 Signal Slip Ring Cleaning (Stainless Type) 3–6. . . . . . . . . . . . . . . . . . . . . . . . . . .

3–4 SIGNAL BRUSH CONTACT SURFACE CLEANING 3–7. . . . . . . . . . . . . . . . . . . . . . . . . . . 3–5 POWER RING CLEANING 3–9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3–6 POWER BRUSH WEAR POWDER CLEANING 3–12. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3–7 FG BRUSH CLEANING (EMC100) 3–13. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

SECTION 4 – REPLACEMENT 4–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4–1 SLIP RING COVER REMOVAL 4–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

4–1–1 EMC100 Type Slip Ring Cover Removal 4–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4–1–2 EMC80 Type Slip Ring Cover Removal 4–4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4–1–3 No EMC Type Slip Ring Cover Removal 4–5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

4–2 SIGNAL BRUSH REPLACEMENT 4–6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4–3 POWER BRUSH REPLACEMENT 4–10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4–4 SIGNAL SLIP RING REPLACEMENT 4–14. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

4–4–1 Signal Slip Ring Replacement (Panel Type––EMC100, EMC80) 4–14. . . . . . . . . 4–4–2 Signal Slip Ring Replacement (Panel Type––No EMC) 4–25. . . . . . . . . . . . . . . . . 4–4–3 Signal Slip Ring Replacement (from Stainless Type to Panel Type) 4–30. . . . . .

4–5 POWER RING REPLACEMENT 4–48. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4–6 FG BRUSH ASSY REPLACEMENT (EMC100) 4–54. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4–7 CONTACT BRUSH ASSY REPLACEMENT (EMC100) 4–56. . . . . . . . . . . . . . . . . . . . . . . . .


2154943

ii

REV 5

TABLE OF CONTENTS (CONTINUED)

SECTION PAGE

SECTION 5 – CHECK AND TEST 5–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5–1 SIGNAL BRUSH WEAR CHECK 5–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5–2 SIGNAL RING ↔ BRUSH CONTACT CHECK 5–3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

5–2–1 Signal Ring ↔ Brush Contact Check (Panel Type) 5–3. . . . . . . . . . . . . . . . . . . . . 5–2–2 Signal Ring ↔ Brush Contact Check (Stainless Type) 5–8. . . . . . . . . . . . . . . . . .

5–3 SIGNAL BRUSH SHORT CIRCUIT CHECK 5–12. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5–3–1 Signal Brush Short Circuit Check (Panel Type) 5–12. . . . . . . . . . . . . . . . . . . . . . . . 5–3–2 Signal Brush Short Circuit Check (Stainless Type) 5–14. . . . . . . . . . . . . . . . . . . . .

5–4 POWER BRUSH WEAR CHECK 5–15. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5–5 FG BRUSH WEAR CHECK 5–17. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5–6 DAS TRANSFER TEST 5–18. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5–7 TEST SCAN 5–19. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

SECTION 6 – BASIC TROUBLE SHOOTING GUIDE 6–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6–1 ERROR CODE 6–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6–2 TROUBLE SHOOTING FLOW CHART USING ERROR CODE 6–2. . . . . . . . . . . . . . . . . 6–3 TROUBLE SHOOTING FLOW CHART USING HEARING SENSE 6–3. . . . . . . . . . . . . . 6–4 SLIP RING AGING 6–4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .


2154943

1–1

REV 5

SECTION – 1 SLIP RING TYPE

You must know which Slip Ring Type is your CT system, before shooting the trouble, maintenance.However, there are many kinds and units among the Slip Ring and the Brush and others.

Investigate and classify your CT system using table 1–1.

When you classify the CT system using table 1–1, the way of distinction is described section 1-1, 1-2, 1-3, 1-4.

Table 1–1 Slip Ring Type

Distinction

SystemSlip Ring Cover

(*1) Slip Ring (*2) Signal Brush(*3)

Interface BD(Stationary)

(*4)

Interface BD(Rotational)

(*5)

ÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇ

Slip RingType

PANEL B.T.B DTRE – ÇÇÇÇÇÇÇÇÇÇ

AEMC 100 TYPE PANEL

TYPE ETC / KYOUEI DTRE – ÇÇÇÇÇÇÇÇÇÇ

B

PANEL B.T.B DTRE –ÇÇÇÇÇÇÇÇÇÇC

EMC 80 TYPE PANELTYPE ETC / KYOUEI DTRE –

ÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇ

D

STANDARD PANEL B.T.B DTR2 – ÇÇÇÇÇÇÇÇÇÇ

EPANELTYPE ETC / KYOUEI DTR2 – ÇÇÇÇÇ

ÇÇÇÇÇF

NO EMC TYPE STRR (early)ÇÇÇÇÇÇÇÇÇÇ

G

STAINLESS B.T.BDTR

STRR (late)ÇÇÇÇÇÇÇÇÇÇ

H

DTR2 STRR2ÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇ

I

STRR (early)ÇÇÇÇÇÇÇÇÇÇ

J

EXTRA (*6) NO EMC TYPE PANEL ETC / KYOUEI DTRSTRR (late)ÇÇÇÇÇ

ÇÇÇÇÇK

TYPEETC / KYOUEI DTR2 STRR2ÇÇÇÇÇ

ÇÇÇÇÇL

(*1) : THE DISTINCTION IS SHOWN AS SECTION 1-1.(*2) : THE DISTINCTION IS SHOWN AS SECTION 1-2.(*3) : THE DISTINCTION IS SHOWN AS SECTION 1-3.(*4) : THE DISTINCTION IS SHOWN AS SECTION 1-4.(*5) : THE DISTINCTION IS SHOWN AS SECTION 1-5.(*6) : EXTRA SYSTEM HAS REPLACED SIGNAL SLIP RING FROM STAIN-LESS RING TO PANEL RING.


2154943

1–2

REV 5

1-1 DISTINCTION THE GANTRY COVERS AMONG EMC 100 TYPE, EMC 80 TYPE AND NO EMC TYPE

There are three types of the Gantry cover.

1. Switch OFF the ”Rotate”switch at the rear Gantry base.

2. Remove the Gantry rear cover.

3. Check the Gantry rear side (see illustration 1–1).

Illustration 1–1 Gantry Covers

SLIP RING COVERAT POWER BRUSH

FRAME GNDBRUSH

FRAME GND BRUSHEXISTENCE

FRAME GND BRUSHNO EXISTENCE

SLIP RING COVEREXISTENCE

NO SLIP RING COVEREXISTENCE

EMC 100TYPE

EMC 80 TYPE NO EMCTYPE


2154943

1–3

REV 5

1-2 DISTINCTION THE RING BETWEEN PANEL TYPE AND STAINLESS TYPE

There are two(2) types of the Slip Ring.



3. Check the signal slip ring at the Gantry rear side (see illustration 1–2).

Illustration 1–2 Slip Ring (Panel and Stainless)

PANEL TYPE RESIN COLOR : CREAM COLORSTAINLESS TYPE RESIN COLOR : BLACK COLOR

GANTRY REAR VIEW


2154943

1–4

REV 5

1-3 DISTINCTION THE BRUSH ASSY BETWEEN ETC/KYOUEI TYPE AND B.T.B TYPE

Basically, there are two types of brush assy.



3. Remove only the Slip Ring cover where is installed upper the Signal Brush assy. The location is as follows ( il-lustration 1–3).

Illustration 1–3 Signal Brush Location

GANTRY REAR VIEW

SIGNALBRUSH

4. Check the MANUFACTURED DATE PRINT or the joint solder between the tip and plate on the Signal Brush assy(see illustration 1–4).

Illustration 1–4 Signal Brush (B.T.B and ETC/KYOUEI)

WHITEPAINT

NO–EXIST

MANUFACTURED DATE PRINT

THE TIP JOINT SOLDER SHAPEFLAT

JOINT SOLDER

B.T.B TYPE

EXISTETC/KYOUEI

TYPE

BALL

FLAT

BALL


2154943

1–5

REV 5

1-4 DISTINCTION THE GANTRY INTERFACE BOARD BETWEEN DTR BOARD AND DTR2 BOARD

The distinction between DTR board and DTR2 board is required to remove the DAS top cover.

1. Remove the DAS top cover. Refer to the each system Component Replacement manual.

2. Check the Silk Print which is printed either ‘DTR’ or ’DTR2’.

Illustration 1–5 Signal Interface Board (DTR and DTR2)

REAR DAS TOP COV-ER

ÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇ

ADCASSY

OFSTCOMP

ASSY

CIFASSY

DAS REARVIEW

DETECTOR

DAS ASSY

SILK PRINT : DTR2 ASSY

SILK PRINT : DTRASSY

DTR2 BOARD TYPE

DTR BOARD TYPE


2154943

1–6

REV 5

1-5 DISTINCTION THE GANTRY INTERFACE BOARD AMONG STRR(EARLY) BOARD AND STRR(LATE)BOARD AND STRR2

1. Switch OFF the ”Rotate”, ”XG” and ”Slip Ring115V” switches at the rear Gantry base.

2. Remove the Gantry covers (left, right, rear and front).

3. Attach the safety switch bracket to the right side of Gantry.

FRONT VIEW FROMTABLE

BRACKET

SAFETY SWITCHES (3)

4. Switch ON the ”Rotate” switch at the rear Gantry base.

5. Set the Gantry to 1 o’clock position and lower the table to the lowest position.

6. Switch OFF the ”Rotate” switch at the rear Gantry base.

7. Remove the four nuts and the back side cover (see illustration 1–6).

8. Check the Parts # Silk Print which is printed either ‘P9183YD’ or ’2109655’ or ‘P9183YN’ (see illustration 1–6).

Illustration 1–6 Signal Interface Board (DTR and DTR2)

GANTRY FRONT VIEW(RIGHT SIDE)

BACK COVER

STRR (EARLY TYPE)

STRR (LATE TYPE)

STRR2

P9183YD

2109665

P9183YN

INTERFACE BOAD PARTS NO.

FOUR NUTS


2154943

2–1

REV 5

SECTION – 2 Caution and Maintenance Prohibit Items

2-1 CAUTION

��

ELECTROCUTION!! THERE IS A LIVE CURRENT RUNNING THROUGH THEGANTRY SLIP RING POWER BRUSHES, DO NOT SERVICE THE GANTRY SLIPRINGS WITHOUT TURNING OFF ROTATE, XG(SAFETY LOOP), SLIP RING115V BREAKERS.

Rotate XG(Safety Loop)

Table/Tilt Control Slip Ring115V(DAS/DET)

��

Exercise caution when working with slip ring components to avoid contact, inhalation, andingestion of slip ring brush powder.

– Use Gloves : Large size :46–194427P400, X–Large size :46–194427P401 Do NOT remove gloves near an exposed slip ring. The powder inside the glove can contaminate the ring.– Use a HEPA Vacuum Cleaner : 46–297933P1 to remove brush black powder (dust).


2154943

2–2

REV 5

2-1 CAUTION (continued)

��

There are small projections at the thin ground ring (see illustration) and at the left edge of theslip ring panel. Take care not to be hurt during the slip ring cleaning.

GROUND RING

PROJECTIONPROJECTION

��

Use the Gloves not to be hurt, when you are performing the maintenance on the Slip Ring andBrush.


2154943

2–3

REV 5

2-2 MAINTENANCE PROHIBIT ITEMS

1 DO NOT HANDLE THE SLIP RING SURFACE AND BRUSHES WITHOUTGLOVES.

2 DO NOT INSTALL THE ETC/KYOUEI BRUSH TO THE STAINLESS SIG-NAL SLIP RING. OTHERWISE, YOU MUST REPLACE THE SLIP RINGASSY.

3 DO NOT WIPE THE ETC/KYOUEI BRUSH, B.T.B BRUSH USING LIQ-UID CLEANER.

4 DO NOT FILE THE ETC/KYOUEI BRUSH USING SAND PAPER.

5 DO NOT TOUCH STAINLESS SIGNAL SLIP RING SURFACE.(EXCEPT FOR ON SITE AGING)

6 DO NOT WIPE THE STAINLESS SIGNAL SLIP RING USING LIQUIDCLEANER. (EXCEPT FOR ON SITE AGING)

7 DO NOT FILE THE STAINLESS SIGNAL SLIP RING USING SAND PAPER. (EXCEPT FOR ON SITE AGING)

8 DO NOT CLEAN UP THE POWER SLIP RING, SIGNAL SLIP RINGWITHOUT REMOVING THE SIGNAL BRUSH ASSY.

9 DO NOT CLEAN UP THE SIGNAL SLIP RING WITHOUT REMOVINGTHE SIGNAL BRUSH ASSY.

10 DO NOT RE–INSTALL THE OLD ETC/KYOUEI BRUSH, WHEN THESIGNAL SLIP RING IS REPLACED. USE NEW ETC/KYOUEI BRUSH.BECAUSE THE NEW ETC/KYOUEI BRUSH IS INCLUDED IN THE SIG-NAL SLIP RING PARTS.


2154943

2–4

REV 5

2-2 MAINTENANCE PROHIBIT ITEMS (continued)

SIGNAL BRUSHASSY

GANTRY REAR VIEW

DO NOT LOOSEN THESESCREWS

11 DO NOT LOOSEN THE FOLLOWING SCREWS:

NoteLoosen these screws, only when you replace STAINLESS RING with PANEL TYPE RING.

NoteWhen the slip ring � brush alignment is NOT correctly adjusted, these screws are must beloosened.

NoteDo NOT loosen any screws except of Allow Label screws.


2154943

2–5

REV 5

2-2 MAINTENANCE PROHIBIT ITEMS (continued)

GANTRY REAR VIEW

DO NOT LOOSEN THESESCREWS

POWER BRUSH ASSY

12 DO NOT LOOSEN THE FOLLOWING SCREWS:

NoteLoosen these screws, only when you replace STAINLESS RING with PANEL TYPE RING.

NoteWhen the slip ring � brush alignment is NOT correctly aligned, these screws must be loosened.

NoteDo NOT loosen any screws except of Allow Label screws.


2154943

2–6

blank


2154943

3–1

REV 5

SECTION – 3 MAINTENANCE

3-1 MAINTENANCE CYCLE AND ITEMS

Table 3–1 shows the GE YMS recommended MAINTENANCE CYCLE and ITEMS.

Table 3–1 Recommended Maintenance Cycle and Items

Gantry Reference Brush TypeGantryRevolutions Check Items Reference

Section A B C D E F G H I J K L

Signal Slip Ring Cleaning 3-3

Cleaning 3-4Signal Brush

Wear Check 5-1� � � � � � � � � � � �

Every 300K Power Slip Ring Cleaning 3-5� � � � � � � � � � � �

or4 Months Cleaning 3-6

Power BrushWear Check 5-4

Cleaning 3-7� �FG Brush assy

Wear Check 5-5� �

Every 500K (or 6 Months) Clean Scattered Powder 3-2 � � � � � � �

Every 900K (or 12 Months) Replace Contact Brush assy 4-7 � �

Every 1000K (or 12 Months) Clean Scattered Powder 3-2 � � � � �


2154943

3–2

REV 5

3-2 SCATTERED POWDER CLEANING

��

Do NOT remove the Power brush Assy and Signal brush main support.

Special Equipment

� HEPA Vacuum Cleaner : 46–297933P1

� HEPA Filters for Vacuum Cleaner : 46–297948P1

� Kim Wipe (2254011)

� Gloves : Large size :46–194427P400, X–Large size :46–194427P401

NoteUse the Gloves during working in order to avoid the slip ring surface contamination and the brushtip contamination by body oil.

1 Switch OFF the “Rotate”, “XG” and ”Slip Ring” switches at the rear Gantry base.

2 Remove the Gantry covers (Left, Right, Front and Rear).

3 Attach the safety switch bracket to the right side of Gantry.

4 Remove the signal brush assy. (Refer to Section 4-2 SIGNAL BRUSH REPLACEMENT)

5 Remove ALL of the slip ling covers, if the system has the slip ring cover at the Gantry rear side. (Refer to Section 4-1 SLIP RING COVER REMOVAL)

6 Using the Vacuum Cleaner, clean the followings until they do NOT have black powder.

� Inner side of the cone portion of the front Gantry cover

� Inner side of the cone portion of the rear Gantry cover

� Gantry rear lower side (especially, lower ring cover stays and lower cable duct cover)

� All of the inner side of the slip ring covers (removed in step 5)

� Power rings

ÊÊÊÊÊÊÊÊ

ÊÊÊÊÊÊÊÊ

ÊÊÊÊÊÊÊÊÊÊÊÊ

ÊÊÊÊ

ŽŽŽŽŽŽŽŽŽ

��

ÅÅÅÅÅÅÅÅÅ

GANTRY REAR LOWER SIDE

INNER SIDE OFCONE

FRONT AND REAR GANTRY COVER

��

POWER RINGS

ALL OF INNER SIDEOF RING COVERS


2154943

3–3

REV 5

3-2 SCATTERED POWDER CLEANING (continued)

7 Using a dry Kim Wipe, clean the following until they do NOT have black powder.

� Detector groove (Input surface of X–ray beam)

� Myler ring inside

DETECTOR GROOVE

MYLER RING INSIDE


2154943

3–4

REV 5

3-3 SIGNAL SLIP RING CLEANING

3-3-1 Signal Slip Ring Wiping (Panel Type)

Special Equipment

� Alcohol (2254012)

� Kim Wipe (2254011)



��

Do NOT be performed on the stainless type Slip Ring.


2 Remove the Gantry covers (Left, Right and Rear).


4 Remove only the slip ring cover which covers the Signal Brush Assy, if the system has the slip ring cover at theGantry rear side. (Refer to Section 4-1 SLIP RING COVER REMOVAL)


6 Switch ON the “Rotate” , ”Table/Tilt” and ”Control” switches and turn OFF the ”XG” and “Slip Ring” switchesat the rear Gantry base.

��

TAKE CARE NOT TO BE HURT DURING THE SLIP RING CLEANING.There are small projections at the thin ground ring (see illustration) and at the left edge of theslip ring panel.

GROUND RING

PROJECTIONPROJECTION


2154943

3–5

REV 5

3-3-1 Signal Slip Ring Wiping (Panel Type) (continued)

7 Rotate the Gantry automatically. To set at the slowest speed, set the TGP Service Switches to MNL, FIX, SPD0, SLOW, CONT in this order.Immediately the ‘ABT/SVE/FIX’ switch is set to the FIX position, the Gantry will starts to rotate.

Illustration 3–2 TGP Service Switches

ABT SPD2 FAST CONT

FIX SPD0 SLOW 90_

SYS

MNL

1 5 2 3 4TGP BOARD

SWITCH-ING OR-DER

8 Wipe off the signal slip ring surface using Kim Wipe with alcohol by rotating the Gantry at slowest speed (see illustration 3–3).

Illustration 3–3 Signal Brush Wiping (or Cleaning) Point

GANTRY REAR VIEW

WIPING (OR CLEANING) POINT

9 Wipe off the signal slip ring surface using dry Kim Wipe by rotating the Gantry at slowest speed. (For removing the remaining alcohol.) (see illustration 3–3).

10 Make sure that all slip ring surface is dry. Otherwise, there are some liquid on the slip ring surface and the thecontact between the slip ring and the brush assy will be bad.


2154943

3–6

REV 5

3-3-2 Signal Slip Ring Cleaning (Stainless Type)

Special Equipment



� Kim Wipe (2254011)








6 Rotate the Gantry automatically (see illustration 3–2). To set at the slowest speed, set the TGP Service Switches to MNL, FIX, SPD0, SLOW, CONT in this order. Immediately the ‘ABT/SVE/FIX’ switch is set to the FIX position, the Gantry will starts to rotate.

7 Clean the signal slip ring surface using the Vacuum Cleaner by rotating the Gantry at slowest speed (see illustration 3–3).


2154943

3–7

REV 5

3-4 SIGNAL BRUSH CONTACT SURFACE CLEANING

There are two(2) types of the Signal Brush.

Special Equipment

� Sand Paper : U0042BF (For B.T.B Type Signal Brush Only)

� Kim Wipe : 2254011 (For ETC/KYOUEI Type Signal Brush Only)

� Oscilloscope

� 1.5 V battery (Type D)� 4

� Battery Holder : P9180GM

� Tie–Wraps



1 Switch OFF the ”Rotate”, ”XG” and ”Slip Ring115V” switches at the rear Gantry base.




��

Do NOT touch the slip ring surfaces and signal brushes !

5 Remove the SIgnal Brush Assy. (Refer to Section 4-2 SIGNAL BRUSH REPLACEMENT)

��

Do NOT touch the slip ring surfaces and signal brushes !

��

Do NOT bend the spring plate of the brush tip.


2154943

3–8

REV 5

3-4 SIGNAL BRUSH CONTACT SURFACE CLEANING (continued)

6 Check visually if any carbon track, black powder are attached to all brushes. If it is, perform the followings:

Illustration 3–4 Signal Brush Surface

BLACK POWDER

CARBONTRACK

7 For B.T.B Type Signal Brush : Slightly file off the brush surface using the Sand Paper (U0042BF) to expose a fresh, new surface.

For ETC/KYOUEI Type Signal Brush : Slightly blow off the brush surface using dry Kim Wipe.

��

Do NOT file off, rubbing the Signal Brush surface.

8 Verify that all brush tips have no carbon tracks, black powder then install the brush Assy.

9 Perform SIGNAL RING � BRUSH CONTACT CHECK. It depends on ‘Slip Ring Type’ and ‘Interface board type’.Refer to either

For B.T.B Type Signal Brush :

� 5-2-1 Signal Ring � Brush Contact Check (PANEL TYPE) or

� 5-2-2 Signal Ring � Brush Contact Check (STAINLESS TYPE)

For ETC/KYOUEI Type Signal Brush :

� 5-2-1 Signal Ring � Brush Contact Check (PANEL TYPE)


2154943

3–9

REV 5

3-5 POWER RING CLEANING

Special Equipment



� Resurfacer : P9183SU

� Flexible Abrasive : P9183SV

� Kim Wipe (2254011)




� Alcohol (2254012)


��

Possible irreparable damage! The inner signal slip rings are very sensitive, never touch or apply any abrasive, or othercleaning material, to the signal slip rings. See Illustration 3–5 .Perform the power slip ring cleaning procedure very carefully, otherwise irreparable damagewill result.

��

Handle the power brushes carefully since they are fragile (made of graphite).Keep grease or dust away from the brushes as these materials will considerably deterioratethe life and performance of the brushes.


2154943

3–10

REV 5

3-5 POWER RING CLEANING (continued)





5 Switch ON the service switch on the SUB board near the TGP board.

6 Rotate the gantry by hand until the effected sections of the power slip rings, the sections with black projections,reach the power brush position, and use the Resurfacer (P9183SU) and the Flexible Abrasive (P9183SV) toscrape clean the rings, in the following way (see illustration 3–5):

a. Remove the Signal Brush Assy. (Refer to Section 4-2 SIGNAL BRUSH REPLACEMENT)

b. Scrape off black projections from the rings using the resurfacer, until the ring surface is leveled; checking thisby touching your finger on the surface.

c. Clean the scraped surfaces using the abrasive to remove filings/powder.

d. The flexible abrasive will soon turn black with use. Cut away the blackened surface to expose a fresh, newsurface and continue scraping clean the power slip rings.

e. Clean up the dust using Vacuum Cleaner.

f. Wipe the power slip ring using Kim Wipe with alcohol.

g. Clean the power slip ring using the dry Kim Wipe.

Illustration 3–5 Power Ring Cleaning Point

CLEANING POINT

115 V GND 550 V


2154943

3–11

REV 5

3-5 POWER RING CLEANING (continued)

7 Switch OFF the service switch on the SUB board near the TGP board.


9 Rotate the Gantry automatically. To set at the slowest speed, set the TGP Service Switches to MNL/FIX/SPD0/SLOW/CONT in this order. Imme-diately the ‘ABT/SVE/FIX’ switch is set to the FIX position, the Gantry will starts to rotate (see illustration 3–2).

10 Clean the power slip ring surface using Vacuum Cleaner during the Gantry rotation (see illustration 3–5).


2154943

3–12

REV 5

3-6 POWER BRUSH WEAR POWDER CLEANING

Special Equipment

� Kim Wipe (2254011)





1 Remove the Power Brush Assy. (Refer to Section 4-3 POWER BRUSH REPLACEMENT)

2 Use dry Kim Wipe / Vacuum cleaner to clean the filings/powder from the ring side of the power holder base andpower brush guides (see illustration 3–6).

��

Do NOT touch the slip ring surfaces

Illustration 3–6 Power Brush Assy

GANTRY REAR VIEW

PLASTIC COVER


2154943

3–13

REV 5

3-7 FG BRUSH CLEANING (EMC 100)

Special Equipment

� Kim Wipe (2254011)

� Sand Paper : U0042BF



1 Remove all FG brushes from the Gantry. Refer to FG Brush Assy Replacement

2 Check visually if any carbon track, black powder are attached to brushes.

Illustration 3–7 FG Brush Surface

BLACK POWDER

CARBONTRACK

3 Remove any carbon tracks and black powder from the brush using a dry Kim Wipe or Sand Paper : U0042BF.

��

Do NOT bend the spring plate of the brush tip.

4 Verify that all brush tips have no carbon tracks, black powder then install the brush Assy.


2154943

3–14

blank


2154943

4–1

REV 5

SECTION – 4 REPLACEMENT

4-1 SLIP RING COVER REMOVAL

4-1-1 EMC 100 Type Slip Ring Cover Removal




4 Perform the following job according to CT System (see illustration 4–1):

For CT Legato / Sytec SRi systems

a. Remove the four nuts and loosen the two nuts from the right side of the outer ring cover.

b. First remove the sub cover, then remove right side of the outer ring cover to access the inner slip ring covers.

For CT other systems

a. Remove the six nuts from the right side of the outer ring cover.

b. Loosen the two nuts from the right side of the outer ring cover, then remove the outer ring cover.

Illustration 4–1 Outer Ring Cover (Right Side)

OUTER RING COVER

4 NUTS

TWO NUTS (LOOSEN, DO NOT REMOVE)

GANTRY FRONT VIEW

OUTER RING COVER

CT Legato/ Sytec SRi only CT other Systems

TWO NUTS (LOOSEN, DO NOT REMOVE)

SUB COVER

NUTS


2154943

4–2

REV 5

4-1-1 EMC 100 Type Slip Ring Cover Removal (continued)

5 Remove the right side ring cover from the rear view, 14 nuts.

6 Remove the left side ring cover from the rear view, 10 nuts.

7 Remove the upper slip ring cover, 23 nuts.

8 Remove the lower slip ring cover with rear cover holder, 8 nuts and 3 Allen screws.

Illustration 4–2 Ring Cover

UPPER RING COVERFOR SYSTEM EMC100 : 23 NUTS (8mm)FOR SYSTEM EMC 80 : 8 NUTS (8mm)

GANTRY REAR VIEW

LOWER RING COVER8 NUTS (8mm) and 3 SCREWS

LEFT SIDE COVER10 NUTS (8mm)

RIGHT SIDE COVERFOR SYSTEM EMC100 : 14 NUTS (8mm)FOR SYSTEM EMC 80 : 10 NUTS (8mm)

3 ALLEN SCREWS (4mm)

POWERBRUSH COVER

SIGNALBRUSH COVER


2154943

4–3

REV 5

4-1-1 EMC 100 Type Slip Ring Cover Removal (continued)

��

When the right and left side covers are installed, they are set over the tabs of the upper andlower covers (see illustration below).

Illustration 4–3 Right and Side Cover Installation

LEFT SIDECOVER RIGHT

SIDE COV-ER

UPPER COVER

LOWER COVER

SIDE COVER

UPPER COVER

GANTRY REAR VIEW

��

When all slip ring covers are installed, verify if there is no strange noise during the Gantryrotation by hand.

Illustration 4–4 Slip Ring Cover Installation

OUTER COVER

INNER COVER

NO INTERFERENCE NOISE


2154943

4–4

REV 5

4-1-2 EMC 80 Type Slip Ring Cover Removal




4 Remove the following covers (see illustration 4–2) :

� Signal Brush Cover Seven Nuts. . . . . . . . . . . . . . . . . .

� Power Brush Cover Eight Nuts and Two Screws. . . . . . . . . . . . . . . . . .

� Right Side Ring Cover Ten Nuts. . . . . . . . . . . . . . .

� Left Side Ring Cover Ten Nuts. . . . . . . . . . . . . . . .

� Upper Rear Slip Ring Cover Eight Nuts. . . . . . . . .

� Lower Rear Slip Ring Cover Eight Nuts and Three Allen Screws. . . . . . . . .

��

When the right and left side covers are installed, they are set over the tabs of the upper andlower covers (see illustration 4–3).

��

When all slip ring covers are installed, verify if there is no strange noise during the Gantryrotation by hand (see illustration 4–4).


2154943

4–5

REV 5

4-1-3 NO EMC Type Slip Ring Cover Removal




4 Remove the following covers (see illustration 4–5) :

� Upper Rear Slip Ring Cover Sixteen Nuts(8mm) and Four Allen Screws(4mm). . . . . . . . .

� Lower Rear Slip Ring Cover Sixteen Nuts(8mm) and Three Allen Screws(4mm). . . . . . . . .

Illustration 4–5 Ring Cover (No EMC)

UPPER REAR RING COVER16 NUTS (8mm)


POWERBRUSHES

SIGNALBRUSHES

GANTRY REAR VIEW

LOWER REAR RING COVER16 NUTS (8mm)


��

When all slip ring covers are installed, verify if there is no strange noise during the Gantryrotation by hand (see illustration 4–4).


2154943

4–6

REV 5

4-2 SIGNAL BRUSH REPLACEMENT

There are three(3) types of the Signal Brush (B.T.B, ETC and KYOUEI).

B.T.B (2143818) ETC (2148394) KYOUEI (2274988)

��

Do NOT install the ETC and KYOUEI brushes to the Stainless Slip Ring. Otherwise, you mustreplace the Ring.

Special Equipment

� Kim Wipe (2254011)

� Alcohol (2254012)

� Sand Paper : U0042BF (For B.T.B Type Signal Brush Only)

� Oscilloscope

� 1.5 V battery (Type D) � 4

� Battery Holder : include in P9180GM

� Tie–Wraps







��

Do NOT touch the slip ring surfaces !


2154943

4–7

REV 5

4-2 SIGNAL BRUSH REPLACEMENT (continued)

5 Remove the two cable connectors, two fiber optic connectors and 20 screws (illustration 4–6) on the STRS board,then remove the STRS board.

NoteThe Adjust Plates underneath the signal brush assemblies have been carefully aligned.

Do NOT loosen or remove the screws holding these plates.

NoteThere are two kinds of signal brush assys. But the replacement is quite same.

SIGNAL BRUSH ASSYSTRSBOARD

DOUBLE BRUSH TYPE:

SIGNAL BRUSH ASSY

SLIP RINGSLIP RING

SINGLE BRUSH TYPE:

STRSBOARD

6 Remove the four screws B and then remove the two signal brush assys (see illustration 4–6).

Illustration 4–6 Signal Brush Assy

GANTRY REAR VIEW

CONNECTORS

FIBER OPTICCONNECTORS

SIGNAL BRUSH ASSY

SCREW B

20 SCREWS


2154943

4–8

REV 5


7 Wipe to clean the filings/powder on the STRS board using dry Kim Wipe.

8 Perform Section 3-3 SIGNAL SLIP RING CLEANING.

9 Install the two NEW signal brush assemblies.(These brush assemblies must be the same type (ETC–ETC or KYOUEI–KYOUEI).). . . . . . . . . . . . . . . . . . . . . . . . . .

In this step, do not install the STRS board yet. It is installed later.

10 Verify that the SHEET BRUSH SUPPORT is not touching the signal ring surface. If it is touching, remove thebrush assembly, correct it bending the SHEET BRUSH SUPPORT by hand, then install again.

��

For a new brush tip, it is OK that its end will be contacted with ring surface.Do NOT bend the tip support spring.

Illustration 4–7 Signal Brush Attachment

GOOD NO GOOD

SIGNAL RING

SHEET BRUSH SUPPORT

BRUSH TIP

TIP SUPPORT SPRING

11 Switch ON the ”Rotate” switch at the rear Gantry base.

12 Rotate the Gantry automatically approximately 2,000 times:To set at the MAX. speed, set the TGP Service Switches to MNL, FIX , SPD2, FAST, CONT in this order. Immedi-ately the ‘ABT/SVE/FIX’ switch is set to the FIX position, the Gantry will starts to rotate.


ABT SPD2 FAST CONT

FIX SPD0 SLOW 90�

SYS

MNL

1 5 2 3 4TGP BOARD

SWITCHING ORDER


2154943

4–9

REV 5


13 Perform Section 3-4 SIGNAL BRUSH CONTACT SURFACE CLEANING.

14 Install the STRS board (Perform steps 6 to 5 in their reverse order).

15 Perform Section 5-2 SIGNAL RING � BRUSH CONTACT CHECK.

16 Perform steps 4 to 1 in their reverse order.

17 Perform the following test :

� DAS Transfer Test (Refer to Section 5-6 DAS TRANSFER TEST)

� Test Scan (Refer to Section 5-7 TEST SCAN)


2154943

4–10

REV 5

4-3 POWER BRUSH REPLACEMENT

Special Equipment

� Kim Wipe (2254011)



� Tie Wraps







��


5 Remove the Power Brush top cover (plastic).

Illustration 4–9 Power Brush Plastic Top Cover Removal

GANTRY REAR VIEW

PLASTIC COVER


2154943

4–11

REV 5

4-3 POWER BRUSH REPLACEMENT (continued)

6 Cut the four(4) tie–wraps securing the power bar cables.

7 For EMC100 System :Disconnect X–condenser (yellow) and Y–condensers (black) from bars by removing five(5) Allen screws.

For EMC80 and No EMC System :Disconnect Y–condensers (black) from bars by removing three(3) Allen screws.

8 Remove the two Allen screws labelled ”A”

Illustration 4–10 Power Brush Assy

POWER HOLDER BASE

POWER BARS

WHITE BLACK GREY

Y–CONDENSERS(BLACK)

X–CONDENSER(YELLOW)FOR EMC100 ONLY

ALLEN SCREW � 5

TOROIDAL CORE

ALLOW LABEL

”A” SCREWS

TIE WRAP � 4

ALLOW LABEL


2154943

4–12

REV 5


9 Dislodge (pull–out) the power holder from its side base by pulling it free of the two support pins.

10 Unscrew the two power guide screws from each brush guide (10) on the back of the power holder assembly, andthen pull the power brush guides out from the power holder base.

11 Unscrew the power bar screws and carefully pull the power bars free from the power holder base.

Illustration 4–11 Power Brush Guide

POWER BRUSH GUIDES

POWER HOLDER BASE

POWER BRUSH

POWER GUIDE SCREWS


2154943

4–13

REV 5


12 Unscrew the brushes, one at a time, remove them and replace them with the new brushes. Verify that the newbrush is the same type as the one it is replacing.

13 Exchange the screws labelled ”M3” in illustration 4–12 from the old brushes to the new brushes, one at a time.

14 Return the power bars to their original positions with the brushes facing downward into the holes of the powerholder base.

15 Insert the center shaft of the spring–pin assemblies shown in illustration 4–12 into the hole on the top of the twopower brushes, and gently slide the power brush guides into their original positions.

16 Repeat step 15 for all ten brushes and brush guides.

17 Perform Section 3-6 POWER BRUSH WEAR POWDER CLEANING.





Illustration 4–12 Power Brush Replacement

M3

POWER BAR

POWER BRUSH GUIDES

CENTER SHAFT OF SPRING ASSEMBLYCHECK LINE

POWER BRUSH

POWER HOLDER BASE


2154943

4–14

REV 5

4-4 SIGNAL SLIP RING REPLACEMENT

4-4-1 Signal Slip Ring Replacement (Panel Type –– EMC 100, EMC 80)

��

Do not re–install the OLD brush (ETC, KYOUEI or B.T.B brush), which was attached in theGantry. Use the NEW signal brush which is included in the SIGNAL SLIP RING parts.

Special Equipment

� Alcohol (2254012)



� Kim Wipe (2254011)

� Tie Wraps

� Felt tip marker

� Functional Check/Adjustment Manual (CD–ROM)







��



2154943

4–15

REV 5

4-4-1 Signal Slip Ring Replacement (Panel Type –– EMC 100, EMC 80) (continued)

5 Verify that the Gantry is balanced for every position of the Gantry.If it is not, perform Rotation Balance Adjustment of the Table/Gantry tab of the Functional Check/Adjustmentmanual.

��

If the Gantry is NOT balanced for every position of the Gantry, the Gantry may rotate by itselfduring replacing the Slip Ring assy.

6 Remove the Signal Brush Assy. (Refer to Section 4-2 SIGNAL BRUSH REPLACEMENT)

7 Dispose the removed Signal Brush Assy.

8 Remove the signal brush support from the Gantry (see illustration 4–13).

Illustration 4–13 Signal Brush Support

GANTRY REAR VIEW

SIGNAL BRUSHSUPPORT

ALLENSCREWS


2154943

4–16

REV 5


9 Remove the Power Brush Assy from the Gantry (see illustration 4–14).

a. Cut the upper two tie wraps securing the power bar cables.

b. Remove the two Allen screws.

c. Dislodge (pull–out) the power holder brush assembly and mounting plate together from the support bracket bypulling it free of the two support pins.

Illustration 4–14 Signal Brush Support

GANTRY REAR VIEW

CUT

DO NOT CUT

x 2


2154943

4–17

REV 5


10 Switch ON the “Rotate” switch at the rear Gantry base.


12 Remove the eight inner slip ring covers. Each cover has two nuts and two Allen screws (see illustration 4–15).

Illustration 4–15 Inner Slip Ring Covers

TWO(2) NUTS

INNER RING COVER 8

TWO(2) ALLENSCREWS


2154943

4–18

REV 5


13 Remove the DTRE board as follows (see illustration 4–16):

a. Rotate the Gantry to the 7 o’clock position by hand

b. Rotate the Gantry by hand to access the DTRE board. The board is located inside the inner ring cover.

c. Remove the upper cover of the DTRE board by removing four(4) screws.

d. Disconnect cables from J1, J2, and J3 connectors on the board.

e. Remove the four(4) stud bolts and eight washers, then remove the DTRE board.

��

Each stud bolt has two(2) washers to keep clearance between upper cover and board.Therefore, be careful not to lose them.

f. Remove the two(2) nuts and lower cover from the Gantry.

Illustration 4–16 DTRE Board Removal

UPPER COVER

DTRE BOARDLOWER COVER

JI J2

J3

SCREW

MOUNTING BOLT

NUT

WASHERS


2154943

4–19

REV 5


14 Remove the Ground screws, support nut and ground plates (1 and 2) from the back(inside) of the signal brushes(see illustration 4–17). Performing other places by rotating the Gantry. (By hand).

Illustration 4–17 Ground Cables

FRONT VIEW FROM TABLE

GROUND SCREWS : 2X8

SUPPORT NUTS : 4�8TORQUE : 14 kg.cm

GROUND PLATE 1

GROUND PLATE 2

NotePlace the cables on the inside of the Gantry so that they do not catch during Gantry Rotation.


2154943

4–20

REV 5


15 Disconnect all signal ring connectors :10 Pin Connector x 2 + 4 Pin Connector x 3 as shown in illustration 4–18.

16 Rotate the Gantry by hand to the Home position.

��

Irreparable Damage.The studs and screws projecting from the back of the slip ring can easily scratch the powerslip ring surfaces during installation or removal. Handle with care.

17 Unscrew eight(8) Philip screws which hold the signal slip rings in place.

18 Switch OFF the “Rotate” switch at the rear Gantry base.

19 Remove the old signal slip ring assy.

20 Clean up any wear powder. Refer to Section 3-2 SCATTERED POWDER CLEANING.

Illustration 4–18 Signal Ring Connectors

4 PINCONNECTOR

10 PINCONNECTOR

PHILIP SCREWS

PHILIP SCREWS


2154943

4–21

REV 5


21 Verify that the new signal slip ring pattern and the support metal ring is isolated (�M�) before installing to theGantry. However, the GND line only is 0� (see illustration 4–19).

Illustration 4–19 Signal Ring Assy

�M�

GND LIME 0�


2154943

4–22

REV 5


22 Insert the new slip ring assy into the position. First insert the upper pin of the slip ring into the hole, then the lower pin (see illustration 4–20).

23 Tighten the eight Philip screws in cross–angle order as shown in illustration 4–21.

Illustration 4–20 Signal Ring Position

GANTRY REAR VIEWHOME POSITION

STUD HOLES

NEW SLIP RING

Illustration 4–21 Signal Ring Cross–Angle Tightening

STARTPHILIP SCREW

1

2

3

4

5

6

8

1

2

3

4

5

6

7

8


2154943

4–23

REV 5


24 Connect all signal ring connectors :10 Pin Connector x 2 + 4 Pin Connector x 3 as shown in illustration 4–18.

25 Tighten the rear slip ring ground nuts as follows (see illustration 4–17) :

a. Tighten the rear slip ring ground screws securely, total 2 x 8 =16.

b. Tighten the rear slip ring support nuts, total 4 x 8 = 32 (14 kgf.cm).

c. Tighten the nuts again (14 kgf.cm); mark each nut after it is tightened.Depending on the curve of the rings once may not be enough.

d. Verify that all nuts are marked as tightened, total 32.

26 Install the DTRE board (Perform steps 13 to 11 in their reverse order).

27 Verify that there is NO the filings/powder from the surface of power slip rings and Gantry rear lower side.

ŽŽŽŽŽŽ

��ÅÅÅÅÅÅÅÅÅ

POWER RINGS

GANTRY REAR LOWER SIDE

28 Clean the signal slip ring surface using Kim wipe with alcohol.

29 Wipe off the signal slip ring surface using dry Kim Wipe.

30 Install the NEW Signal Brush Assy which is included in the SIGNAL SLIP RING parts.(Refer to Section 4-2 SIGNAL BRUSH REPLACEMENT)

31 Install the Power Brush Assy to the Gantry (see step 9).


2154943

4–24

REV 5




34 Rotate the Gantry using the TGP service switches (MNL/FIX/SPD2/FAST/CONT) for 2,000 rotations at fastestspeed (see illustration 4–8).

35 Perform the Signal Brush Contact Surface Cleaning (refer to Section 3-4 SIGNAL BRUSH CONTACT SURFACECLEANING).

36 Install STRS board.

37 Check the contact status of signal ring and the signal brush.(Refer to Section 5-2-1 Signal Ring � Brush Contact Check (PANEL TYPE))






2154943

4–25

REV 5

4-4-2 Signal Slip Ring Replacement (Panel Type –– No EMC)

��

Do not re–install the OLD brush (ETC, KYOUEI or B.T.B brush), which was attached in theGantry. Use the NEW signal brush which is included in the SIGNAL SLIP RING parts.

Special Equipment

� Alcohol (2254012)



� Kim Wipe (2254011)

� Tie Wraps

� Felt tip marker








��



��



2154943

4–26

REV 5

4-4-2 Signal Slip Ring Replacement (Panel Type –– No EMC) (continued)










12 Rotate the Gantry by hand and mark the eight(8) inner slip ring covers (see illustration 4–22).This will allow proper installation later since not all the covers have plastic edge guards

Illustration 4–22 Inner Slip Ring Cover Positions


INNER RING COVERS (TOTAL EIGHT)

PLASTICEDGE GUARDS

HOME


2154943

4–27

REV 5


13 Remove the eight(8) inner slip ring covers. Each cover has four(4) nuts (see illustration 4–23).

Illustration 4–23 Inner Slip Ring Cover Positions

FOUR NUTS

BACK COVER

14 Disconnect the ground cable nuts 1 and screws 2 , and support nuts 3 from the back (inside) of the signalbrushes (see illustration 4–24). Performing other places by rotating the Gantry. (By hand)

Illustration 4–24 Ground Cables


NUT 16 (7mm)

PHILLIPS (PLUS) SCREW�16

FLANGE NUT 16TORQUE : 14 kg.cm

SUPPORT NUT � 16TORQUE : 14 kg.cm

1 GROUND CABLE NUTS

2

3



2154943

4–28

REV 5


15 Disconnect all signal ring connectors :10 Pin Connector x 2 + 4 Pin Connector x 3 as shown in illustration 4–18.


��

Irreparable Damage.The studs and screws projecting from the back of the slip ring can easily scratch the powerslip ring surfaces during installation or removal. Handle with care.

17 Unscrew eight(8) Philip screws which hold the signal slip rings in place.

18 Switch OFF the “Rotate” switch at the rear Gantry base.

19 Remove the old signal slip ring assy.



22 Insert the new slip ring assy into the position. First insert the upper pin of the slip ring into the hole, then the lower pin (see illustration 4–20).


24 Connect all signal ring connectors :10 Pin Connector x 2 + 4 Pin Connector x 3 as shown in illustration 4–18.

25 Tighten the rear slip ring ground nuts as follows (see illustration 4–17) :

a. Tighten the rear slip ring ground nuts 1 and screws 2 and support ring nuts 3

b. Tighten the nuts again (14 kgf.cm); mark each nut after it is tightened.Depending on the curve of the rings once may not be enough.

c. Verify that all nuts are marked as tightened, total 32.

26 Install the eight(8) inner slip ring covers (Perform steps 13 to 11 in their reverse order).

27 Verify that there is NO the filings/powder from the surface of power slip rings and Gantry rear lower side.

28 Clean the signal slip ring surface using Kim Wipe with alcohol.

29 Wipe off the signal slip ring surface using dry Kim Wipe.

30 Install the NEW Signal Brush Assy which is included in the SIGNAL SLIP RING parts.(Refer to Section 4-2 SIGNAL BRUSH REPLACEMENT)



2154943

4–29

REV 5













2154943

4–30

REV 5

4-4-3 Signal Slip Ring Replacement (from Stainless Type to Panel Type)

��

The SIGNAL SLIP RING REPLACEMENT (STAINLESS ��PANEL TYPE) is required the specialservice engineer who has experience this replacement. Call A.S.C, E.S.C or O.L.C. before thiswork.

��

Do not re–install the OLD brush (B.T.B brush), which was attached in the Gantry.Use the NEW signal brush which is included in the Slip Ring Kit : 2147710.

Special Equipment

� Dial Gauge with stand

� Torque wrench

� Lock tight

� Tie Wraps

� Kim Wipe (2254011)

� Alcohol (2254012)




� Slip Ring Kit : 2147710. The detail is as follows :

Item Part NamePart Num-

ber Qty. Description

1 SLIP RING ASSY 2149878 12 SR SHIM (0.1mm) P9183JD 10 For Ring Frame Adjustment3 SR SHIM (0.2mm) P9183JE 10 For Ring Frame Adjustment4 SR SHIM (0.4mm) P9183JF 10 For Ring Frame Adjustment5 POS PIN1 (Small) P9183LP 2 For Brush Holder Alignment6 POS PIN2 (Large) P9183LN 2 For Brush Holder Alignment7 P9223QK JIG ASSY 2113741 1 For Signal Brush Position Alignment8 POWER HOLDER JIG P9183QN 1 For Power Brush Holder Position Alignment9 RATING PLAGE 2111567 1 For Reference only, No Locator Card

10 PLATE ASSY 2113740 1 For 25MHz DAS only (Discard this for 40MHz DAS)11 SCREW N9410ES 1 For 25MHz DAS only (Discard this for 40MHz DAS)12 SCREW N9410JS 1 For 25MHz DAS only (Discard this for 40MHz DAS)13 SIGNAL BRUSH 2274988 114 Maintenance Manual 2154943 1


2154943

4–31

REV 5

4-4-3 Signal Slip Ring Replacement (from Stainless Type to Panel Type) (continued)





��



��











12 Rotate the Gantry by hand and mark the eight(8) inner slip ring covers (see illustration 4–22).This will allow proper installation later since not all the covers have plastic edge guards.

13 Remove the eight(8) inner slip ring covers. Each cover has four(4) nuts (see illustration 4–23).


2154943

4–32

REV 5


14 Disconnect the power cables from the back (inside) of the power slip rings (see illustration 4–25).

a. Disconnect the 550 VDC and 550 VRTN power cables (x2 locations).

b. Disconnect the 115V power cables, one blue and one brown (x2 locations).

15 Place the power cables on the inside of the Gantry and fix the cables to the cable stay bracket using tie wrapsso that they do not catch during Gantry Rotation.

Illustration 4–25 Slip Ring Power Cables


550 VRTNWHITE CABLE(BLACK COVER)

550VDCBLACK CABLE

BLUE 115V(INSIDE)

BROWN 115V(OUTSIDE)

DOUBLENUTS

16 Set the Gantry to 7 o’clock position and lower the table to the lowest position.

17 Disconnect the ground cable attached to the back (inside) of the power slip rings (see illustration 4–26).

Illustration 4–26 Slip Ring Power Cables and STRR

ÜÜÜÜÜÜÜÜÜÜÜÜÜÜÜÜ

FRONT VIEWGROUND CABLEDOUBLE NUTS

STRR2STRR (EARLY TYPE)STRR (LATE TYPE)


2154943

4–33

REV 5


18 Place the ground cable on the inside of the Gantry and fix the cables to the cable stay bracket using tie wrapsso that it does not catch during Gantry Rotation (see illustration 4–26).

19 Remove either STRR(early type) or STRR(late type) or STRR2 (see illustration 4–27).

a. Disconnect all connector from the board.

b. Disconnect all nuts from the board.

c. Use Tie–Wraps to secure the cables/connectors disconnected from the board to the rotating Gantry frame(see illustration 4–28).

d. Remove the board.

NoteDo not dispose either STRR(early type) or STRR(late type) or STRR2

Illustration 4–27 STRR Assy

CN1

CN2

CN3

� � �

10 NUTS

CN2

CNF

CN3CN1

10 NUTS

CN2CNSCN2

12 NUTSSTRR2STRR (LATE TYPE)STRR (EARLY TYPE)

Illustration 4–28 Cable Tie–Wrapping


2154943

4–34

REV 5


20 Rotate the Gantry to the home position.


22 Unscrew the slip ring frame support screws, sixteen, using a wrench as follows: (see illustration 4–29).(A strong torque may be required since these screws are installed using lock tight.)

a. Remove all the screws except the top and bottom screws.

b. Loosen the top and bottom screws.

c. Remove the top and bottom screws while performing step 23

d. Place the sixteen(16) support screws in a safe place, they will be used again.

Illustration 4–29 Slip Ring Frame Support Screws

GANTRY REAR VIEW

16 SCREWS (8x2)(TORQUE 58.5kgDcm)

TOP AND BOTTOM SCREWS


2154943

4–35

REV 5


23 Pull the slip ring frame assembly out from the lower alignment pin while holding the top pin, two people.

Illustration 4–30 Slip Ring Frame Removal

PUSH

PULL

PULL

PERSON A

PERSON B

24 Support the slip ring frame assembly as shown in Illustration below, two people.

25 Remove the slip ring frame assembly, pull it free from the top alignment pin.

CAUTION

The slip ring frame assembly is heavy (40kg), be very careful.

Illustration 4–31 Slip Ring Frame Carrying Position

PERSON A PERSON B

DO NOT TOUCHRING SURFACES


2154943

4–36

REV 5




28 Hold the new slip ring frame with the number ’1’ on the back facing upward.

29 Install the new slip ring frame using the positioning pins as shown in illustration below

30 Screw the slip ring frame support screws with lock tight loosely into place, sixteen. After applying lock tight, donot take a break until all screws are firmly tightened.


32 Connect the 550 VDC and 550 VRTN power cables attached to the back (inside) of the power slip rings (seeillustration 4–25).

33 Connect the 115V power cables, one blue and one brown (x2 locations) (see illustration 4–25).

34 Connect the ground cable attached to the back (inside) of the power slip rings (see illustration 4–26).

Illustration 4–32 Slip Ring Frame Support Installation

NUMBER ON BACK OF SLIP RING FRAME

1

5

2

3

46

7

8

NUMBER 1 :TOP PIN

NUMBER 5 :BOTTOM PIN


2154943

4–37

REV 5


35 For STRR : P9183YD (early type) or STRR : 2109665 (late type) (see illustration 4–34)

a. Remove the connector and terminal strip labelled A .

b. Remove the support plate (see illustration 4–33).

Illustration 4–33 Support Plate Removal

SUPPORT PLATE

c. Install PLATE ASSY using screws (kit : N9410ES, N9410JS).

d. Install the STRR ASSY board.

e. Extend the STRR ASSY board connector wires if necessary. (Cut the tie wraps and pull more slack from theinside of the Gantry, then tie wrap the cables again.

f. Connect the four connectors and two wires.

NoteThe CN2 connector on the STRR ASSY board is no longer used.

Illustration 4–34 STRR Board

DUMMYJUMPER

CONNECTOR

DUMMYJUMPER

CONNECTORSCN1, CN3

WIRES (2)7mmG, H

CONNECTOR CN2

A


2154943

4–38

REV 5


36 For STRR2 : P9183YN (see illustration 4–35)

a. Discard the STRR2 board.

b. Connect the two connectors

c. Connect the four wires to the terminal strip on the metal plate according to their labels.

Illustration 4–35 Rear Connector Installation

DUMMYJUMPER

CONNECTOR

DUMMYJUMP-ER

CONNECTOR CN2

WIRES (4)

TERMINAL

STEELPLATE

GH

YZ

37 Cut the ID tag off (it is no longer connected to the STRR or STRR2 board) of connector CN2 and tie wrap thecable to the holes on the inside frame as shown in illustration below.

Illustration 4–36 Connector CN2 Tie–Wrap Locations

GROUND CABLE

TIE WRAP CN2 CABLE TO HOLESON INSIDE OF FRAME (2)


2154943

4–39

REV 5


38 Install the signal brush support (see illustration 4–13).

a. Install the signal brush support onto the support pins.

b. Screw the four screws.

39 Install the lower signal brushes.

40 Attach a dial gauge to the signal brush support.

41 Set the gauge pin on top of the inner most signal brush. Do not touch the signal rings with the gauge pin (seeillustration 4–37).


43 Rotate the Gantry by hand one complete turn and measure the difference between the highest and lowest slipring height.

Illustration 4–37 Dial Gauge Placement on the Signal Brush

GAUGE PIN

SIGNAL BRUSH

GANTRY REAR VIEW

REMOVE TIE WRAP BASEIF NECESSARY


2154943

4–40

REV 5


44 If the total difference in height is more than 0.5 mm (+/– 0.25 mm) then proceed as follows:

a. Rotate the Gantry by hand one complete turn and locate the lowest point (farthest inward) of the slip ring.

b. Mark the lowest point with a piece of tape or chalk.

c. Rotate the Gantry until the lowest point is at the bottom (6 o’clock) position.

d. Select a shim to increase the height the appropriate amount.

e. Loosen the outside and inside shim screws and insert the shim in the closest joint (see illustration 4–38).

f. Repeat until the total height difference is 0.5 mm or less.

45 Stick some cellophane tape on the tip of the gauge pin so that it will slip easily on the ring surface and not damagethe ring surface.

Illustration 4–38 Inner Shim Insert

SHIM

LOOSENSCREWS(2)

DO NOT LOOSEN

LOOSENSCREWS(2)


2154943

4–41

REV 5


46 Measure the total height difference for the power rings as follows (see illustration 4–39) :

a. Set the gauge pin on top of the outer most power ring.

b. Rotate the Gantry and measure the difference between the highest and lowest slip ring height.

c. Mark the lowest point with a piece of tape or chalk.

d. Repeat step a. to c. for each power ring.

Illustration 4–39 Dial Gauge Placement on the Power Brush

GANTRY REAR VIEW


2154943

4–42

REV 5


47 If the total difference in height for one ring is more than 0.5 mm (+/– 0.25 mm) then proceed as follows (see il-lustration 4–40) :

a. Estimate the average lowest point for the power rings based on all the readings in step 46

b. Rotate the Gantry until the lowest point is at 9 o’clock position form the Gantry back side.

c. Select a shim to increase the height the appropriate amount.

d. Loosen the outside and inside shim screws and insert the shim in the closest joint.

48 Repeat step 46 and 47 until the total height difference is 0.5 mm or less for all power rings.

Illustration 4–40 Outer Shim Insert

LOOSENSCREWS(2)

SHIM

LOOSENSCREWS(2)

DO NOT LOOSEN


2154943

4–43

REV 5


49 Measure the total height difference for each signal slip ring (refer to steps 41 and 43)

50 Mark up the lowest point.

51 Adjust accordingly (refer to step 44).

52 Measure the total height difference for each power slip ring (refer to step 46).

53 Mark up the lowest point.

54 Adjust accordingly (refer to step 47).

55 Repeat the above procedure until the total height difference is 0.5 mm or less for all slip rings.

56 Remove the dial gauge from the signal brush main support.

57 Remove the lower signal brushes.

58 Rotate the Gantry, so that the lowest point measured in step 50 is at 3 o’clock position from the Gantry back side.

59 Insert the two POS PIN2s (Large) into the signal brush main support (see illustration 4–41).

60 Align the closest pair of outer slip ring frame positioning holes with the adjustment screws. If the adjustmentscrews do not fit into the positioning holes, slightly loosen the three screws (see illustration 4–41).

61 Screw the two POS PIN2s (Large) tightly by hand (see illustration 4–41).

Illustration 4–41 Signal Brush Main Support Attachment

THREESCREWS

SLIPRINGFRAME SIGNAL

BRUSHSUPPORT

POS PIN2(Large)

OUTER SLIP RING FRAME POSITIONING HOLE

POS PIN2(Large)

POS PIN1(Small)

SLIPRINGFRAME

SIGNALBRUSHSUPPORT

POS PIN 1(Small)


2154943

4–44

REV 5



63 Adjust the signal brush main support as follows (see illustration 4–42) :

a. Screw the two POS PIN1s (Small) tightly by hand (see illustration 4–41).

b. Loosen the front and rear screws.

Illustration 4–42 Signal Brush Main Support Alignment Check

REAR SUPPORTSCREWS (2)

FRONT SUPPORTSCREWS (2)

REAR SUPPORTSCREWS (2)

c. Person A : Push the signal brush main support by hand so that two POS PIN1s (Small) and two POS PIN2s(Large) are the status as shown in illustration 4–41.

Person B : Tighten, bit by bit, the front, rear and support screws.

d. Rotate 1/6 rotation(CCW) the two POS PIN1s (Small) and the two POS PIN2s (Large) (see illustration 4–41).

e. Verify that two POS PIN1s (Small) and two POS PIN2s (Large) are still touching to the slip ring panel. If not,repeat from step b. to d.

f. Remove the two POS PIN1s (Small) and the two POS PIN2s (Large).


2154943

4–45

REV 5



65 Rotate the Gantry CW to 9 degrees from the home position by hand.

66 Insert the two POS PIN2s (Large) into the signal brush main support (see illustration 4–41).

67 Align the closest pair of outer slip ring frame positioning holes with the adjustment screws (see illustration 4–41).

68 Loosen the two screw B (see illustration 4–43).

69 Adjust the alignment tool until its corners are perfectly seated in the alignment holes.

70 Tighten the two screw R loosely.

71 Looking from the side, as in illustration, verify that the adjusting plate is comfortably in place. If it is twisted ormisaligned, then loosen the screw R and properly align it and the ring alignment tool again.

72 Tighten the two screw B.

73 Unscrew the two screw R.

74 Remove the slip ring alignment tool from the signal brush main support.

75 Repeat steps 68 to 74 for the bottom plate.

Illustration 4–43 Alignment Tool Positioning

BOTTOM PLATE

UPPER PLATE SCREW B

ALIGNMENT TOOL

SCREW R

ALIGNMENT HOLE


2154943

4–46

REV 5


76 Check the Gantry serial number.

77 Perform this adjustment only if the Gantry serial number listed below, otherwise proceed to the next section:

P9183AF – 111919YM7 or later P9183AJ – 121708YM2 or laterP9183AG –112234YM0 or later ProSeed – NB3038 or laterP9183AH – 121609YM2 or later ProSeed Accell – NA3041 or later

78 Rotate the Gantry, so that the lowest point measured in step 53 is at 9 o’clock position from the Gantry back side.

79 Attach the power holder jig (see illustration 4–44).

80 Loosen the power brush holder, three screws accessed from the side.

81 Insert the adjustment screws into the power holder jig.

82 Align the closest pair of outer slip ring frame positioning holes with the adjustment screws.

83 Adjust the power holder until the adjustment screws fit comfortably into the slip ring frame holes.

84 Tighten the power brush holder into place, three screws accessed from side.

85 Remove the adjusting screws.

86 Remove the power holder jig.

Illustration 4–44 Power Holder Adjustment

POWER HOLDERJIG

POWER BRUSH HOLDER SCREW 3

SLIPRINGFRAME

SIGNALBRUSHSUPPORT

POS PIN 1(Small)

POS PIN1(Small)


2154943

4–47

REV 5


87 Install the inner slip ring covers (Perform steps 13 to 11 in their reverse order).

88 Verify that there is NO the filings/powder from the power rings and from the base frame surfaces located belowthe slip ring housing. Refer to Section 3-2 SCATTERED POWDER CLEANING.

89 Clean the slip ring surface using Kim Wipe with alcohol.

90 Wipe off the signal slip ring surface using dry Kim Wipe .

91 Install the NEW Signal Brush Assy which is included in the Slip Ring Kit : 2147710.Refer to













2154943

4–48

REV 5

4-5 POWER RING REPLACEMENT

��

Do NOT wipe the Power Ring.

Special Equipment

� Torque Wrench

� Kim Wipe (2254011)



� Tie wraps

� Felt tip marker








��



��



2154943

4–49

REV 5

4-5 POWER RING REPLACEMENT (continued)

6 Remove the Signal Brush Assy. Refer to Section 4-2 SIGNAL BRUSH REPLACEMENT.







10 Remove the eight(8) inner slip ring covers. Each cover has two(2) nuts and two(2) Allen screws (see illustration4–45). There are two kinds of inner cover.

Illustration 4–45 Inner Slip Ring Covers (EMC and No EMC Type)

TWO(2)NUTSINNER RING

COVER 8

TWO(2) ALLENSCREWS

FOUR NUTS

BACK COVER

EMC 80, 100NO EMC


2154943

4–50

REV 5



12 Disconnect the power cables attached to the back (inside) stud of each 115V power slip ring.


13 Remove the nuts which hold the 115V slip rings in place. Manually rotate the Gantry to access the nuts (2 sliprings X 16 nuts, 7mm).

��

Irreparable Damage.The studs and screws projecting from the back of the slip ring can easily scratch other slipring surfaces during installation or removal. Handle with care.

Illustration 4–46 115V Slip Ring Power Cables


BLUE(INSIDE)

BROWN(OUTSIDE)TORQUE : 24 kgf.cm


2154943

4–51

REV 5



15 Remove the slip rings

16 Insert the new slip rings into position; the power studs, slightly larger, should be at the 2 and 10 o’clockpositions.

Illustration 4–47 Power Ring Position

GANTRY REAR VIEW

POWER CABLE STUDS

POWER CABLE STUDS

HOME POSITION


2154943

4–52

REV 5


17 Tighten the slip ring nuts (hand tight) in cross–angle order as show in illustration 4–48. Do not tighten the nutsin order of rotation.

Note

Tighten nut 1 . Then rotate the Gantry 8 nuts and tighten, 4 nuts and tighten, and 8 nuts and tighten.Next rotate 10 nuts and repeat for 8nuts, 4 nuts, 8 nuts, etc.

(START, 8, 4, 8, 10, 8, 4, 8, 13, 8, 4, 8, 10, 8, 4, 8)

18 Tighten the slip ring nuts in cross–angle order a second time (20kgf.cm). Depending on the curve of the ringsonce may not be enough. Mark each nut after it is tightened.

19 Tighten again if necessary. Verify that all nuts are marked as tightened.

Illustration 4–48 Slip Ring Cross Angle Tightening

8

7

1

2

9

10

5

611

12

13

143

4

16

15


START

1 2

8 nuts

3 4

4 nuts 8 nuts

5 6 7 8 10 nuts

Rotate Rotate Rotate

13 nuts9 10 11 12

10 nuts14 15 1613

START

8 nuts 8 nuts

8 nuts 4 nuts 8 nuts

8 nuts 4 nuts 8 nuts

8 nuts


2154943

4–53

REV 5


20 Clean the followings until they do NOT have black powder using the Vacuum Cleaner. (Refer to Section 3-2SCATTERED POWDER CLEANING.)

� Gantry rear lower side (especially, lower ring cover stays and lower cable duct cover)

� Power rings



23 Verify that no abnormal noise sounds during the Gantry rotation by hand.

24 When the Gantry rotates manually by hand, verify that the gantry should NOT be in contact with the covers.

25 Switch ON the ”Rotate”, ”XG” and ”Slip Ring115V” switches at the rear Gantry base.


27 Rotate the Gantry automatically at all kinds of speed.

28 Verify that no abnormal noise sounds.




30 Switch OFF the ”Rotate” switch at the rear Gantry base.

31 Install the rear and both side Gantry covers.



2154943

4–54

REV 5

4-6 FG BRUSH ASSY REPLACEMENT (EMC 100)

Special Equipment






4 Remove ALL of the slip ling covers. (Refer to Section 4-1 SLIP RING COVER REMOVAL)

5 Remove the FG BRUSH ASSY and install the new one.

NoteWhen the NEW FG BRUSH ASSY is installed, be mounted the positioning hole of the FG BRUSHASSY into the pin.

Illustration 4–49 FG Brush Replacement

LOOSEN NUT(TORQUE:25kg�cm)

DO NOT LOOSEN

PIN

POSITIONING HOLE


2154943

4–55

REV 5

4-6 FG BRUSH ASSY REPLACEMENT (EMC 100) (continued)

6 Verify that the brush tip is positioned at center of circle hole.


Illustration 4–50 Brush Tip Position

BRUSH TIP

CIRCLE HOLE


2154943

4–56

REV 5

4-7 CONTACT BRUSH ASSY REPLACEMENT (EMC 100)

Special Equipment






4 Remove ALL of the slip ling covers. (Refer to Section 4-1 SLIP RING COVER REMOVAL)

5 Remove the CONTACT BRUSH ASSY from the Gantry back side and install the new one. (There are four(4)CONTACT BRUSH ASSYs at the the Gantry back side.)


Illustration 4–51 Contact Brush Assy

LOOSEN NUT ONLY FOUR TURNS(TORQUE : 25 Kg � cm)

DO NOT LOOSEN


2154943

5–1

REV 4

SECTION – 5 CHECK AND TEST

5-1 SIGNAL BRUSH WEAR CHECK

Special Equipment

� Kim Wipe (2254011)



1. Switch OFF the “Rotate”, “XG” and ”Slip Ring” switches at the rear Gantry base.

2. Remove the Gantry covers (Left, Right and Rear).


4. Remove only the slip ring cover which covers the Signal Brush Assy, if the system has the slip ring cover at theGantry rear side. (Refer to Section 4-1 SLIP RING COVER REMOVAL)

NOTICE


5. Remove the Signal Brush Assy. Refer to Section 4-2 SIGNAL BRUSH REPLACEMENT.

6. Visually inspect the upper and lower signal brushes for wear. There is a check line on each brush (see illustration5–1). If any brush is worn below this line, the Signal Brush Assy must be replaced in 100,000 rotations.

NOTICE

Do NOT touch the signal brush surface!

Illustration 5–1 Signal Brush Wear (Erosion)

NEWCHECK LINE

OUT OF SPECIFICATION


2154943

5–2

REV 4

5-1 SIGNAL BRUSH WEAR CHECK (continued)

7. Clean whole areas of brush holder and STRS board indicated by “A” in illustration 5–2 using dry Kim Wipe afterremoving the STRS board during each periodic inspection.

Illustration 5–2 Cleaning of the Brush Assy

SIGNAL BRUSH ASSY

STRS BOARD

WIPE FILINGS/DUST CAREFULLYWHICH WOULD GATHER BE-TWEEN THE ARRAYED METALPLATES

CLEAN “A”.

CLEAN BRUSH HOLDER.

DOUBLE BRUSH TYPE:

SIGNAL BRUSH ASSY

SLIP RING

STRS BOARD

WIPE FILINGS/DUST CAREFULLYWHICH WOULD GATHER BE-TWEEN THE ARRAYED METALPLATES

CLEAN BRUSH HOLDER.

SINGLE BRUSH TYPE:

CLEAN “A”.

SLIP RING


2154943

5–3

REV 4

5-2 SIGNAL RING � BRUSH CONTACT CHECK

5-2-1 Signal Ring � Brush Contact Check (PANEL TYPE)

Special Equipment

� Oscilloscope



� Tie–Wraps



Equivalent Circuit

120W

6VDC

TWO SHORT CONNECTOR (4 PIN)

STRS BOARD

(EXTERNAL BATTERY SOURCE)

OSCILLOSCOPE


2154943

5–4

REV 4

5-2-1 Signal Ring � Brush Contact Check (PANEL TYPE) (continued)


2. Remove the Gantry covers (Left, Right, Front and Rear)


4. Remove only the slip ring cover which covers the Signal Brush Assy, if the system has the slip ring cover at theGantry rear side. (Refer to Section 4-1 SLIP RING COVER REMOVAL)

NOTICE


5. Switch ON the “Rotate” switch at the rear Gantry base.


7. Switch OFF the “Rotate” switch at the rear Gantry base.

8. Remove the three socket bolts and slip ring connector cover.

Illustration 5–3 Connector Cover Removal

CONNECTOR COVER

REAR VIEW

3


2154943

5–5

REV 4


9. Exchange the following system cable connectors (4 pin, 10 pin) with the jumper connectors for shorting (4 pin,10 pin) at the gantry rear base (see illustration 5–4). However, cut Tie–Wraps for these cables.

10. Tie the cables/connectors, which were disconnected in previous step, using Tie–Wraps in order to fix them duringthe Gantry rotation.

Illustration 5–4 Swapping Connectors

BLACK COL-ORCONNECTOR

BROWN COL-ORCONNECTOR

PLASTIC ROTATIONAL RING(SIGNAL BRUSH)

METAL ROTATIONAL RINGTIE–WRAPS

CONNECTOR COVER

REAR VIEW

SWAPCONNECTORS


2154943

5–6

REV 4


11. Disconnect CN1A, CN1B, CN2, CN3 from the STRS board.

12. Remove the jumper pin JP1 from the STRS board.

13. Connect the Oscilloscope probes and power supply (1.5 V battery (Type D) � 4+Battery Holder) wires to theSTRS Board as shown for CASE 1 in illustration 5–5.

NoteThe Oscilloscope mode setting is as follows. But the example uses SONY TEKTRONIX 2230.

Vertical axis :1.0 V/ div. (DC range)Horizontal axis :0.2 ��2.0 �� sec/ div.Menu setting Display Vectors : ON

Smooth : OFFAdvanced FunctionACQ_MODE_SETUP_TREE

REPETITIVE : ACC PEAKFAST RECORD : ACC PEAK

Illustration 5–5 STRS Board Wire Connection

TP–I

JP 1

TP–A

TP–B1

TP–B2

TP–C

TP–D1

TP–D2

TP–E

TP–F1

TP–F2

TP–G

TP–H1

TP–H2

OSCILLO-SCOPE

OSCILLOSCOPE

6 VDC POWER

6 VDC POWER

6 VDC POWER

6 VDC POWER

OSCILLO-SCOPE

OSCILLOSCOPE

TEST JUMPER(REMOVED DURING TEST)

STRS

TP–J2

CN1A

CN1B

CN2

CN3

TP–J1 CASE 1

CASE 2


2154943

5–7

REV 4



15. Rotate the Gantry using the TGP service switches (MNL, FIX, SPD2, FAST, CONT), and then either switch OFFthe breaker on the Servo Amp. or switch ON the Service Switch and while the Gantry is rotating by its own inertia,continuously verify that there are no small drops or fluctuations in voltage. There should be no voltage drop great-er than 0.5 volts.

ABT SPD2 FAST CONT

FIX SPD0 SLOW 90_

SYS

MNL

1 5 2 3 4TGP BOARD

SWITCH-ING OR-DER

16. Change only two TGP service switches (MNL→OFF, CONT→HOME)

ABT SPD2 FAST CONT

FIX SPD0 SLOW 90_

SYS

MNL

2 1TGP BOARD

SWITCH-ING OR-DER

17. Disconnect the Oscilloscope probes and power supply (1.5 V battery (Type D) � 4+Battery Holder) wires fromthe STRS Board as shown in illustration 5–5.

18. Connect the Oscilloscope probes and power supply (1.5 V battery (Type D) � 4+Battery Holder) wires to theSTRS Board as shown for CASE 2 in illustration 5–5 (TP–A).

19. Repeat step 15. to 16. for TP–A and then for the remaining signal brushes by connecting the test lines for eachrespective signal brush (TP–C, TP–E, and TP–G).


2154943

5–8

REV 4

5-2-2 Signal Ring � Brush Contact Check (STAINLESS TYPE)

Special Equipment

� Oscilloscope



� Short cable : include in P9180GM (For STRR Early Type (P9183YD) only)

� Tie–Wraps



Equivalent Circuit

120W

6VDC

FOR STRR(P9183YD) : SHORT CABLEFOR STRR(2109665) : CONNECTOR AND JUMPER PINSFOR STRR2(P9183YN) : CONNECTOR

STRS BOARD

(EXTERNAL BATTERY SOURCE)

OSCILLOSCOPE


2154943

5–9

REV 4

5-2-2 Signal Ring � Brush Contact Check (STAINLESS TYPE) (continued)


2. Remove the Gantry covers (Left, Right, Front and Rear)




6. Switch OFF the “Rotate” switch at the rear Gantry base.

7. Remove the four nuts and the back side cover which the STRR or STRR2 board exists on.

Illustration 5–6 STRR/STRR2 and Back Cover

BACK COVER

GANTRY FRONT VIEW(RIGHT SIDE)

FOUR NUTS

STRR/STRR2

CN2

CNF

CN3CN1

CN1

CN2

CN3

C E G I

CN2

CNS

CN1

STRR(P9183YD) STRR(2109665) STRR2(P9183YN)


2154943

5–10

REV 4


8. Perform the following job according to STRR board type (see illustration 5–6):

For STRR board (P9183YD)

a. Disconnect CN1, CN2, CN3 and black/white cable from the STRR board.

b. Remove ten nuts from the STRR board.

c. Use Tie–Wraps to secure the cables/connectors disconnected from the STRR board to the rotating Gantryframe.

d. Attach five short cables to the A stud � B stud, C stud � D stud, E stud� F stud, G stud � H stud, I stud� Jstud where the STRR board was installed (see illustration 5–7).

NoteThe short cable is included as part of P9180GM which is shipped with the CT system.

Illustration 5–7 Installing Short Jumper

C E G I

SHORT CABLE

TO GANTRY CENTER

For STRR board (2109665)

a. Disconnect CN1, CN3 and black/white cable from the STRR board.

b. Swap connectors between CN2 and CNF.

c. Set the jumpers on JP3 and JP4 to the TEST side.

d. Use Tie–Wraps to secure the cables/connectors disconnected from the STRR board to the rotating Gantryframe.

For STRR2 board (P9183YN)

a. Remove the connector from CN1.

b. Connect the connector, which was removed in previous step, to CNS connector.

c. Use Tie–Wraps to secure the cables/connectors disconnected from the STRR board to the rotating Gantryframe.


2154943

5–11

REV 4


9. Disconnect CN1A, CN1B, CN2, CN3 from the STRS board (see illustration 5–5).

10. Remove the jumper pin JP1 from the STRS board (see illustration 5–5).

11. Connect the Oscilloscope probes and power supply (1.5 V battery (Type D)� 4+Battery Holder) wires to theSTRS Board as shown for CASE 1 (see illustration 5–5).

NoteThe Oscilloscope mode setting is as follows. But the example uses SONY TEKTRONIX 2230.

Vertical axis :1.0 V/ div. (DC range)Horizontal axis :0.2 ��2.0 �� sec/ div.Menu setting Display Vectors : ON

Smooth : OFFAdvanced FunctionACQ_MODE_SETUP_TREE

REPETITIVE : ACC PEAKFAST RECORD : ACC PEAK


13. Rotate the Gantry using the TGP service switches (MNL, FIX, SPD2, FAST, CONT), and then either turn OFFthe breaker on the Servo Amp. or turn ON the Service Switch and while the Gantry is rotating by its own inertia,continuously verify that there are no small drops or fluctuations in voltage. There should be no voltage drop great-er than 0.5 volts.

14. Change only two TGP service switches (MNL→OFF, CONT→HOME).

15. Disconnect the Oscilloscope probes and power supply (1.5 V battery (Type D) � 4+Battery Holder) wires fromthe STRS Board (see illustration 5–5).



a. Connect the lines as shown in CASE 2 of illustration 5–5 (TP–A), and attach the jumper across the respectivestuds at the STRR board location (for A & B slip rings).

For STRR board (2109665) and STRR2 board (P9183YN)

a. Connect the lines as shown in CASE 2 of illustration 5–5 (TP–A).

17. Repeat from step 13. to 14. for TP–A and then for the remaining signal brushes by connecting the test lines foreach respective signal brush (TP–C, TP–E, and TP–G) (see illustration 5–5).


2154943

5–12

REV 4

5-3 SIGNAL BRUSH SHORT CIRCUIT CHECK

5-3-1 Signal Brush Short Circuit Check (PANEL TYPE)

Special Equipment



1. Rotate the Gantry to the home position (12 o’clock).


3. Remove the Gantry covers (Left, Right and Rear)


5. Remove the slip ring cover, if the system has the slip ring cover at the Gantry rear side. (Refer to Section 4-1SLIP RING COVER REMOVAL)

6. Remove or disconnect the two inner connectors located at the back side of the slip ring (see illustration 5–8).

Illustration 5–8 Swapping Connectors

BLACK COL-ORCONNECTOR

BROWN COL-ORCONNECTOR

VIEW FROM TOP

PLASTIC ROTATIONAL RING (SIGNAL BRUSH)

METAL ROTATIONAL RING

GANTRY REAR VIEW

JUMPER JUMPERSYSTEMSYSTEM

TIE–WRAPS

CONNECTOR COVER


2154943

5–13

REV 4

5-3-1 Signal Brush Short Circuit Check (PANEL TYPE) (continued)

7. Remove the two cable connectors, two fiber optic connectors and 20 screws on the STRS board, then removethe STRS board (see illustration 5–9). This isolates the slip rings from the external connections.

Illustration 5–9 STRS Board Removal

GANTRY REAR VIEW

CONNECTORS

FIBER OPTICCONNECTORS

SIGNAL BRUSH ASSY

20 SCREWS

NOTICE

The resistance measurement must be performed at the brush support. Never place the multi-meter probe onto the slip ring surface. It can permanently damage the slip ring.

8. Measure the resistance between the signal brushes at the brush support. Perform the measurement with all pos-sible combinations (see illustration 5–10).

9. The measurement must be 40� between DAS signal brushes and infinite (open) for the other combinations (seeillustration 5–10).

Illustration 5–10 Slip Ring Brush Assy

BRUSHSUPPORT

DAS

ÂÂÂÂÂÂ

ÂÂÂÂÂÂ

W

ÂÂÂÂ

ÂÂÂÂ


2154943

5–14

REV 4

5-3-2 Signal Brush Short Circuit Check (STAINLESS TYPE)

Special Equipment







5. Remove the four nuts and the back side cover which STRR or STRR2 board exists on (see illustration 5–6).



a. DIsconnect all connectors (CN1, CN2, CN3) and WHITE color cable, BLACK color cable from STRR.

For STRR board (2109665)

a. DIsconnect all connectors (CN1, CN2, CN3, CNS) and WHITE color cable, BLACK color cable from STRR.

For STRR board (P9183YN)

a. DIsconnect all connectors (CN1, CN2, CNS) from STRR2.

7. Remove the two cable connectors, two fiber optic connectors and 20 screws on the STRS board, then removethe STRS board (see illustration 5–9). This isolates the slip rings from the external connections.

NOTICE

The resistance measurement must be performed at the brush support. Never place the multi-meter probe onto the slip ring surface. It can permanently damage the slip ring.

8. Measure the resistance between the signal brushes at the brush support. Perform the measurement with all pos-sible combinations (see illustration 5–10).

9. The measurement must be 40� between DAS signal brushes and infinite (open) for the other combinations (seeillustration 5–10).


2154943

5–15

REV 4

5-4 POWER BRUSH WEAR CHECK

Special Equipment






4. Remove only the slip ring cover which covers the Power Brush Assy, if the system has the slip ring cover at theGantry rear side. (Refer to Section 4-1 SLIP RING COVER REMOVAL)

NOTICE


5. Remove the Power Brush top cover (plastic).

Illustration 5–11 Power Brush Plastic Top Cover Removal

GANTRY REAR VIEW

PLASTIC COVER


2154943

5–16

REV 4

5-4 POWER BRUSH WEAR CHECK (continued)

6. Visually verify that the check line of each Power Brush shown in illustration 5–12 has NOT reached the powerbar surface.

Illustration 5–12 Power Brush Replacement

M3

POWER BAR

POWER BRUSH GUIDES

CENTER SHAFT OF SPRING ASSEMBLYCHECK LINE

POWER BRUSH

POWER HOLDER BASE

If any brush has reached the power bar surface, the Power Brush must be replaced in 100,000 rotations.(Refer to Section 4-3 POWER BRUSH REPLACEMENT)


2154943

5–17

REV 4

5-5 FG BRUSH WEAR CHECK (EMC 100)

Special Equipment

� Kim Wipe (2254011)



1. Remove all FG brushes from the Gantry. Refer to Section 4-6 FG BRUSH ASSY REPLACEMENT (EMC 100).

2. Visually inspect the upper and lower FG brushes for wear. There is a check line on each brush (see illustration5–13). If any brush is worn below this line, the FG brush must be replaced in 100,000 rotations.

NOTICE

Do NOT touch the FG brush surface!

Illustration 5–13 FG Brush Wear (Erosion)

NEWCHECK LINE

OUT OF SPECIFICATION


2154943

5–18

REV 4

5-6 DAS TRANSFER TEST

1. Insert the BOOT floppy into the disk drive.

2. Touch the [Maint] key.

3. Enter $$, as follows;

*** MAINTENANCE MENU ***

1. CALIBRATION..

Select No. = $$ ‘CR’

4. Select SUPPORT from the Maintenance menu.

5. Select DAS DATA TRANSFER TEST from the Support menu.

6. Edit the test mode as follows;

TEST : BIT BY BIT BY TESTGANTRY : ROTATESCAN TIME : 2.0 sec ← (Select Minimum Scan Time)NO. OF SCAN : 1NO. OF TEST : 1

7. Execute the test.

8. Verify that a ‘PASS 1’ indication is displayed.

9. Set the display to normal status. (Press the [Cancel] key a a few times.)


2154943

5–19

REV 4

5-7 TEST SCAN

1. Execute the following scan only.

Table 5–1 Test Scan

FOV TIME THKSPECIFICATION

System PTMFOV(cm) KV

TIME(sec) mA FOCUS

THK(mm) XC σC XO

Sytec SRi LegatoSytec Synergy 42cm P.P 42 120 1.5 200 – 10 M10 �13 M10�3

ProSpeed VX ProSeed AccellProSpeed ProSeed Accell EIProSpeed Plus ProSeed

ProSeed EF

35cm P.P 50 120 1 350 Large 10 M10 �9 M10�3

ProSpeed S 42cm P.P 50 120 1.5 200 – 10 M10 �15.5 M10�3

ProSpeed LemageProSpeed S Fast Lemage SXProSpeed SX Lemage SX/EProSpeed SX Power

42cm P.P 50 120 1.5 250 – 10 M10 �16 M10�3

Lemage Supreme 42cm P.P 50 120 1.5 160 – 10 M10 �15.5 M10�3

ProSpeed Advantage ProSpeed SA 42cm P.P 50 120 1 250 Large 10 M10 �15.2 –

* –120 � M10 � –100

2. Visually check each image for rings, bands, streaks, shadings or artifacts near the image center. And verify thatthere are no error message.Position a 2 cm diameter ROI at the locations listed below and record the results on the Data/Work sheets.

Xc – Mean CT number in the center ROI.

Xo – Mean CT number 10 cm off center ROI.

�C – Standard deviation of the center ROI.

�0 – Standard deviation of the 10 cm off center ROI.

+Y

–Y

–X +X

IMAGE

Xc (0.0 cm)

Xo (10.0 cm)

ROI CIRCLE (2 cm DIAMETER)(2 LOCATIONS)


2154943

5–20

blank


2154943

6–1

REV 4

SECTION – 6 BASIC TROUBLE SHOOTING GUIDE

6-1 ERROR CODE

When an error occurs due to the slip ring trouble, the error messages are shown on the OC screen. However, thesemessages do not always imply to the slip ring trouble. there are always other possible causes (DBM, Optical Cable,DTR etc.).

Table 6–1 shows the errors which only the slip ring is caused.

Table 6–1 Table Title

Error No. Error Name Error Code Trouble Line

Error 101 Scan Error 46, 47, 56, 57, 59, 76, 77, 79 DAS TRIG

Error 104 OGP Event Error 2 DAS TRIG

Error 110 Scan Processor Com. Error 1, 2 RX, TX, TGP

Error 112 TGP Time Out 1, 2 RX, TX,TGP

Error 117 XG Error x 49 SAFETY LOOP LINE

Error 203 View Data Corrected View No. xxx DAS LINE

Error 204 View Data NOT Corrected View No. xxx DAS LINE

Error 205 1st View Specially Cottected DAS LINE


2154943

6–2

REV 4

6-2 TROUBLE SHOOTING FLOW CHART USING ERROR CODE

Use this trouble shooting flowchart, when the error messages are shown on the OC screen.

NoteIf you are turned around the same loop in this flow chart two times, stop anything and call A.S.C,

E.S.C or O.L.C.

Illustration 6–1 Trouble Shooting Flow Chart from Error Code

OK

NGSIGNALBRUSH

WEAR CHECK

START

� SIGNAL BRUSH REPLACEMENT

SIGNAL BRUSHRING $ BRUSH

CONTACTCHECK

NG

� SIGNAL BRUSH CLEANING� POWER BRUSH CLEANING� SIGNAL SLIP RING CLEANING� POWER SLIP RING CLEANING� SLIP RING AGING

(FOR STAINLESS RING ONLY)OK

SIGNAL BRUSHSHORT SIRCUIT

CHECK

NG

� SIGNAL BRUSH CLEANING� POWER BRUSH CLEANING� SIGNAL SLIP RING CLEANING� POWER SLIP RING CLEANING

OK

TOTAL TESTNG

� CHECK OTHER COMPONENTS� DAS TRANSFER TEST� TEST SCAN

OK

END


2154943

6–3

REV 4

6-3 TROUBLE SHOOTING FLOW CHART USING THE HEARING SENSE

Basically, this trouble causes by the strange noise.

NoteIf you are turned around the same loop in this flow chart two times, stop anything and call A.S.C,

E.S.C or O.L.C.

Illustration 6–2 Trouble Shooting Flow Chart

OK

NGPOWER BRUSHWEAR CHECK

START

� POWER BRUSH REPLACEMENT

POWER SLIP RING CLEANING

OK

*1) STRANGE NOISECHECK

NG CALL A.S.C, E.S.C, O.L.C

OK

END

*1) : TEST ALL KINDS OF ROTATION SPEEDS BYMANUAL MODE ON THE TGP BOARD.


2154943

6–4

REV 4

6-4 SLIP RING AGING

Introduction

Multi–wire aging is to be performed on systems with a voltage drop due to slip ring/brush contact greaterthan 0.5 Volts. This voltage drop is checked during the first three sections of this procedure; do not perform this multi–wire aging if the voltage drop is within specification.

Cautions

NOTICE

Do NOT perform the AGING for the PANEL RING !!!

CAUTION

Possible irreparable damage. The inner signal slip rings are very sensitive, never touch them.

CAUTION

Rotation Hazard.Part of this procedure will be conducted with the Service Switch ON.

Ensure that the Gantry is balanced properly at every position

NOTICE

Excessive aging reduces the life of the signal brushes.In any case, total aging must NOT exceed 20 hours (90000 rotations).


2154943

6–5

REV 4

6-4 SLIP RING AGING (continued)

Special Equipment

� Aging Kit : 2114540

Parts Name Parts No. Qty.

1 Cleaner Support Assy 21145411 1

2 Aging Brush Assy 2118754 2

3 Ring Cleaner Assy P9183MY 2

4 Screw N9506JS 45 Screw N9512ZX 16 Washer N9500WS 17 Signal Brush P9183FH 38 Color Chart 2120475 19 Manual 2119292 1

� Oscilloscope

� 1.5 V battery � 4

� Battery Holder : include in P9180GM

� Short cable : include in P9180GM

� Tie–Wraps



� Sand Paper : U0042BF

� Adhesive Tape

� Alcohol : 2254012

� Kim Wipe : 2254011




2154943

6–6

REV 4


Flow Chart

The flow chart is only main items. The detail is from next sub–section.

Illustration 6–3 Slip Ring Aging Flow Chart

SIGNAL BRUSHRING $ BRUSH CONTACT

CHECK

OK

NG

START

� CHECK OTHER COMPONENTS

END

SYSTEM CAN AFFORD TO HAVE 3 WEEKS TO SHOOT

THIS TROUBLE

THE GANTRY ROOM HAS SULFURIC GAS EXCEEDING THE

ACCEPTABLE LEVEL ?

AGING STAINLESS SLIP RING

SIGNAL BRUSHRING $ BRUSH CONTACT

CHECK

TOTAL TEST

� DAS TRANSFER TEST

� TEST SCAN

� CALL A.S.C, E.S.C, O.L.C

NG

NG

OK

OK

NO

YES

NO

YES


2154943

6–7

REV 4


Signal Ring ↔ Brush Contact Check (before Aging)

1. Perform Signal Ring ↔ Brush Contact Check. Refer to Section 5-2 SIGNAL RING � BRUSH CONTACTCHECK.

2. Proceed as follows:

Voltage drop < 0.5 Volts: Do not perform this procedure, and return the system to normal. Investigate othercauses.

Voltage drop > 0.5 Volts: proceed to the next sub–section (Air Condition Check).

Air Condition Check

1. If the system can afford to have 3 weeks to shoot the trouble, perform this sub–section, if not, perform next sub–section (Stainless Slip Ring Aging).

2. File the surfaces of three signal brushes (in Aging kit) from the kit using Sand Paper.

3. Attach these three signal brushes on the rear cover of the Gantry using Adhesive Tape. (This is to investigatethe air condition in the scan room.) (see illustration 6–4)

Illustration 6–4 Air Condition Check

ATTACH THREE BRUSHES ON THE SURFACE

ADHESIVE TAPE

GANTRY REAR COVER

FILE THE SURFACES

4. Three weeks later after attaching the brushes, compare the color of the brush surfaces with the Color Chart (inAging kit) (see illustration 6–5).

If the color of the brush surfaces has turned similar to color of STEP 1 or STEP 2 or STEP 3, proceed next sub–section (Stainless Slip Ring Aging). This result indicates that the air condition is no problem.

If the color of the brush surfaces has turned similar to color of STEP 4 or STEP 5 or STEP 6, this indicates thatthe air contains sulfur or sulfur dioxide exceeding the acceptable level. Stop working and CALL A.S.C, E.S.Cor O.L.C.

Illustration 6–5 Color Chart

STEP 1 2 3 4 5 6


2154943

6–8

REV 4


Stainless Slip Ring Aging

1. Remove all slip ring covers. Refer to Section 4-1 SLIP RING COVER REMOVAL.

2. Remove the signal brush assy. Refer to Section 4-2 SIGNAL BRUSH REPLACEMENT.

3. Clean up the signal slip ring. Refer to Section 3-3 SIGNAL SLIP RING CLEANING.

4. Turn ON the “Rotate” , “Table/Tilt” and “Control” switches and turn OFF the “XG” and “Slip Ring” switches atrear Gantry base.

5. Rotate the Gantry automatically. To set at the slowest speed, set the TGP Service Switches to MNL, FIX, SPD0,SLOW, CONT in this order. Immediately the ‘ABT/SVE/FIX’ switch is set to the FIX position, the Gantry will startsto rotate.


ABT SPD2 FAST CONT

FIX SPD0 SLOW 90_

SYS

MNL

1 5 2 3 4TGP BOARD

SWITCH-ING OR-DER

6. Hold the Kim Wipe with alcohol onto the surface of one signal slip ring and wipe the ring using Kim Wipe.

7. Continue to clean the slip ring surface of all black fillings/powder.

8. Dry the surface of the slip ring totally with dry Kim Wipe.

9. Repeat steps 6. to 8. for each (total 10) signal slip ring.

10. Set the TGP Service Switches to OFF, SVE, SPD0, SLOW, CONT

11. Turn OFF the “Rotate” switch at rear Gantry base.


2154943

6–9

REV 4


Stainless Slip Ring Aging (continued)

12. Attach the Cleaner Support assy (in Aging kit) to the main signal brush support, using screw N9512ZX (in Aging kit) from the kit and the screw C in illustration 6–7, which was removed at the time of signal brushremoval.

13. Attach the Ring Cleaner assy �2 (in Aging kit) to the cleaner support assy, using 4 screws(N9506JS).

14. Adjust the ring cleaner assemblies so that they contact the signal slip ring surface at every gantry position asfollows (see illustration 6–7):

a. Loosen the cleaner support assy screws, 1 .

b. Rotate the gantry by hand and roughly adjust the center of the ring cleaner assemblies over the ring surfaces.

c. Tighten the cleaner support assy screws.

d. Loosen the ring cleaner assy M5 screws 2 .

e. Adjust the ring cleaner assy positions while rotating the gantry by hand.

f. Loosen the ten ring cleaner assy M3 screws(×10) 3 one at a time.

g. Adjust each ring cleaner assy position while rotating the gantry by hand until every cleaner completely coverseach slip ring surface at every gantry position.

Illustration 6–7 Ring Cleaner Assemblies

CLEANING SUPPORT ASSY

SIGNAL BRUSH SUPPORT

SCREW C

N9506JS(x4)

RING CLEANER ASSY

N9512ZX

3

2

1


2154943

6–10

REV 4



15. Install the aging brush assy (upper and lower) to the main signal brush support arms (see illustration 6–8).

a. Position the upper assembly so that the brushes are positioned at rings B, D, F, H, and J.

b. Position the lower assembly so that the brushes are positioned at rings A, C, E, G, and I.

16. Bend the overhanging wire brushes back at the following positions so that they do not interfere with the slip ringsupport frame as shown in illustration 6–8. It may be necessary to bend more than one wire brush.

17. Adjust the aging brush assembly positions as follows:

a. Adjust the brushes so they contact the whole surface of every signal slip ring.

b. Rotate the gantry by hand and confirm that at every gantry position the brushes contact each signal slip ringsurface totally.

Illustration 6–8 Aging Brush Assemblies

AGING BRUSH ASSEMBLY(UPPER)

AGING BRUSH ASSEMBLY(LOWER)

AB

CD

EF

GH

IJ


2154943

6–11

REV 4



18. Switch OFF the service switch on the SUB board near the TGP board.

19. Write down the value shown on the rotation counter.

20. Turn ON the “Rotate” and “Slip Ring 115V” switches at rear Gantry base.

21. Rotate the Gantry using the TGP service switches (MNL, FIX, SPD2, FAST, CONT) for three hours (13500 rota-tions) at fastest speed.

22. Turn OFF the “Rotate” and “Slip Ring 115V” switches at rear Gantry base.

23. Perform steps 16. to 12. in their reverse order.

24. Clean up the signal slip ring. Refer to Section 3-3 SIGNAL SLIP RING CLEANING.

25. Install the signal brush assy. Do NOT install STRS board yet in this step. Refer to Section 4-2 SIGNAL BRUSHREPLACEMENT.

26. Rotate the Gantry using the TGP service switches (MNL, FIX, SPD2, FAST, CONT) for fifteen minutes (1000rotations) at fastest speed.


2154943

6–12

REV 4


Signal Ring ↔ Brush Contact Check (After Aging)

1. Install STRS board.� Do NOT connect all connectors on the STRS board yet. Refer to Section 4-2 SIGNALBRUSH REPLACEMENT.

2. Perform SIGNAL RING � BRUSH CONTACT CHECK. Refer to Section 5-2 SIGNAL RING � BRUSH CON-TACT CHECK.

3. Proceed as follows:

Voltage drop < 0.5 Volts: return the system to normal. This result is that the aging was succeeded.

Voltage drop > 0.5 Volts: call A.S.C, E.S.C or O.L.C.

4. Connect STRS board’s all connectors. Refer to Section 4-2 SIGNAL BRUSH REPLACEMENT.

5. Install all slip ring covers. Refer to Section 4-1 SLIP RING COVER REMOVAL.

Total Test

1. Turn OFF the “Rotate” and “Slip Ring 115V” switches at rear Gantry base.

2. Install the Gantry covers (both side and rear).

3. Turn ON the “Rotate” and “Slip Ring 115V” switches at rear Gantry base.

4. Perform the following test:



If the test is out of specification, call A.S.C, E.S.C or O.L.C.


2154943

A–1

REV 3

APPENDIX A – SYMBOLS AND CLASSIFICATION

Symbol Publication Description

417–5032 Alternating Current

�

335–1 Three–phase Alternating Current

��

335–1 Three–phase Alternating Current with neutral con-ductor

Direct Current

417–5019 Protective Earth (Ground)

348 Attention, consult ACCOMPANYING DOCUMENTS

417–5008 OFF (Power: disconnection from the mains)

417–5007 ON (Power: connection to the mains)

Warning, HIGH VOLTAGE

Emergency Stop


2154943

A–2

REV 3

APPENDIX A – SYMBOLS AND CLASSIFICATION (continued)

Symbol Publication Description

Type B

417–5339 X–ray Source Assembly Emitting

417–5009 Standby

Start

Table Set

Abort

Intercom

(on Operator Console)Power On: light onStandby: light off


2154943

A–3

REV 3


Symbol Description

Microphone (Mic)

Contrast

Brightness

��

��

System storage prior to installation:Maintain storage temperature between –10° C and +60° C

��

��

System storage prior to installation:Maintain non–condensing storage

humidity below 95%

DO NOT store system longer than 90 days

��

��

System storage and shipment :Maintain Air Pressure between 750 and 1060hPa


2154943

A–4

REV 3


CLASS 1 EQUIPMENT

Any permanently installed equipment containing operator or patient accessible surfaces must provide backup protec-tion against electric shock,in case the BASIC INSULATION fails. In addition to BASIC INSULATION,Class1 equip-ment contains a direct connection to a PROTECTIVE(EARTH) CONDUCTOR which prevents shocks when a persontouches a broken piece of equipment or touches two different equipment surfaces simultaneously.

TYPE B EQUIPMENT

CLASS I, II, or III EQUIPMENT or EQUIPMENT with INTERNAL ELECTRICAL POWER SOURCES provide an ade-quate degree of protection against electric shock arising from (allowable) LEAKAGE CURRENTS or a breakdownin the reliability of the protective earth connection.

ORDINARY EQUIPMENT

Enclosed EQUIPMENT without protection against the ingress of water.

OPERATION 0f EQUIPMENT

CONTINUOUS OPERATION WITH INTERMITTENT LOADING.

Operation in which EQUIPMENT is connected continuously to the SUPPLY MAINS. The stated permissible loadingtime is so short that the long term on–load operating temperature is not attained. The ensuing interval in loading is,however, not sufficiently long for cooling down to the long term no–load operating temperature.

EQUIPMENT not suitable for use in the presence of a FLAMMABLE ANESTHETIC MIXTURE WITH AIR or WITHOXYGEN or NITROUS OXIDE

CLEANING

The ProSpeed S series system is NOT WATERPROOF. It is NOT designed to protect internal components againstthe ingress of liquids.Clean external system surfaces(Gantry,table,consoles and accessories)with a soft cloth dippedin hot water and wrung DAMP/DRY. (NOT dripping!) IF NECESSARY, use only mild (dish washing liquid) soap to re-move dirt.

��

Avoid damage to equipment! Some ”spray and wipe”cleaners etch and permanently cloudclear plastic surfaces!! Use only warm water and mild liquid soap to clean surfaces.

�

GE Medical Systems: Telex 3797371P.O. Box 414, Milwaukee, Wisconsin 53201 U.S.A.(Asia, Pacific, Latin America, North America)

GE Medical Systems – Europe: Telex 698626283, rue de la Miniére, B.P. 34, 78533 Buc Cedex, France

Documents

CT SLIP RING MAIN. M..pdf