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Sanyo C29FS51 Chassis LB6-A Service Manual

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Manual de usuario y servicio tecnico

Text of Sanyo C29FS51 Chassis LB6-A Service Manual

FILE NO.

SERVICE MANUAL Colour Television

Model No. C29FS51

(Argentina)

Service Ref. No.

SpecificationsPower Source . . . . . . . . AC220V, 50Hz / 60Hz Receiving System . . . . . PAL (M/M, N/N), NTSC (M/M) Channel Coverage Antenna mode VHF: CH02-CH13, UHF: CH14-CH69 CATV mode VHF band: CH01-CH13, Mid band: CH14-CH22 Super band: CH23-CH36, Hyper band: CH37-CH64 Ultra band: CH65-CH94 and CH100-CH125 Low mid band: CH95-CH99 Video IF . . . . . . . . . . . . . 45.75MHz Aerial Input Impedance 75 Input Terminals AV1 (Video): Composite Video Input (Phone Jack) x 1 S-Video Input (Separated Y/C) DIN 4-pin Jack x 1 AV1 (Audio):L/R Stereo Input (Phone Jack) x 1 set AV2 (Video):Composite Video Input (Phone Jack) x 1 AV2 (Audio):L/R Stereo Input (Phone Jack) x 1 set DVD (Video): Component Y, CB, CR Input (Phone Jack) x 1 set DVD (Audio): L/R Stereo Input (Phone Jack) x 1 set Output Terminals Video Monitor Output: Phono jack x 1 Audio Monitor Output: L/R Stereo Output (Phone Jack) x 1 set Headphone Jack: Mini stereo jack x 1 Sound Output (RMS) . . . 5W + 5W Speaker . . . . . . . . . . . . . . 6cm x 12cm x 2 pcs. Dimensions . . . . . . . . . . . 750(W) x 590(H) x 416.5(D) mm Weight . . . . . . . . . . . . . . . approx. 36.5 Kg Specifications subject to change without notice. BG4E

Product Code: 113020204

Original Version Chassis Series: LB6-A

Give complete SERVICE REF. NO. for parts order or servicing. It is shown on the rating plate at the cabinet back of the unit.

This T.V. receiver will not work properly in foreign countries where the television transmission system and power source differ from the design specifications. Refer to the specification table.

ContentsSafety Notice . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 Chassis Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 IC Block Diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-8 Service Adjustments. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-18 Cabinet Parts List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 Chassis Electrical Parts List. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20-27

Safety NoticeSAFETY PRECAUTIONS1: An isolation transformer should be connected in the power line between the receiver and the AC line when a service is performed on the primary of the converter transformer of the set. 2: Comply with all caution and safety-related notes provided on the cabinet back, inside the cabinet, on the chassis or the picture tube. 3: When replacing a chassis in the cabinet, always be certain that all the protective devices are installed properly, such as, control knobs, adjustment covers or shields, barriers, isolation resistorcapacitor networks etc.. Before returning any television to the customer, the service technician must be sure that it is completely safe to operate without danger of electrical shock.

X-RADIATION PRECAUTIONThe primary source of X-RADIATION in television receiver is the picture tube. The picture tube is specially constructed to limit X-RADIATION emissions. For continued X-RADIATION protection, the replacement tube must be the same type as the original including suffix letter. Excessive high voltage may produce potentially hazardous X - RADIATION. To avoid such hazards, the high voltage must be maintained within specified limit. Refer to this service manual, high voltage adjustment for specific high voltage limit. If high voltage exceeds specified limits, take necessary corrective action. Carefully follow the instructions for + B1 volt power supply adjustment, and high voltage check to maintain the high voltage within the specified limits.

PRODUCT SAFETY NOTICEProduct safety should be considered when a component replacement is made in any area of a receiver. Components indicated by mark in the parts list and the schematic diagram designate components in which safety can be of special significance. It is particularly recommended that only parts designated on the parts list in this manual be used for component replacement designated by mark . No deviations from resistance wattage or voltage ratings may be made for replacement items designated by mark .

-2-

Antenna+5VRC +5V

+8V

P10/21 CRT DRIVE+8V

KEY SW+5VRC

R/G/B

CRT

R/G/B+28V

+200V HV/Fo/Sc

R/C PRE-AMP TUNER IF (LV76113) SAW filter SUSOC-16V +16V

BUS

H-OUT

DY-H

DY-V

HORIZ-DRIVE E W OU T FBP IN

HORIZ-OUT FBT PLUSE

MONITOR OUT VIDEO NJM2533MPS-VIDEO Y/AV1-V

VV+ VIDEO+8V

(LA78141-E/ LA7846NZ) VERT-OUT AUDIO BUSAUDIO L/R+8V +5V

Chassis Block Diagrams

SIGNAL PROCESSING CIRCUIT

AV1/AV2/DVD AUDIO IN MONITOR OUT AUDIO

10V

SPEAKER(L) SIF OUT+32V

+140V +28V

(LA72703) AV1/AV2/DVD L/R AUDIO INPUT AUDIO OUTPUT

L/R TC4052BFP

L L/R (LA42205-E) R

AC220V

(SANKEN)

AUDIO-OUT

SPEAKER(R)10V

POWER

-3-

AV2/DVD/S-VIDEO C

VIDEO

IC Block DiagramsIC601 POWER SUPPLY IC (STRW6754)

FUNCTIONAL BLOCK DIAGRAM

-4-

IC Block DiagramsIC201 < IF/Video/Chroma/Def./CPU > LA76113

-5-

IC Block DiagramsIC501 LA78141

IC001 LA42205

-6-

LA72703

BTSC Decoder

- Reference Apprication -

OUT(L) MODE Monitor+

OUT(R) 10u 33n 4u7+ + + + +

Vcc 5V 10u 33n 4u7 22u 4u7

1u 2u2+

+

IC3401LA72703

4k7 1u + 47u+

0.1?

1u

100u 0.1u

24 22 20MODE OUT

23 21 19 14MUTE MATRIX

IC Block Diagrams

18

17

16

15

13

Spectral In

Offset Cancel

L+R L-R/SAP LPF MUTEL-R DEMOD ST/SAP SW

PILOT LEVEL DET

-6dB

dbx processor

STEREO PLL

PILOT CANCELLER

LPF ControlSAP DET SYSTEM CONTROL

Offset Cancell

SAP DEMOD

PILOT DET

LPF SAP BPF SIF DEMOD GND

ST SAP AddressIIC DECODE

Wide RMS DET

Spectral DET

REGULATOR

1 44u7+

20.1u 4.5M BPF

3

5

6

7

8

9

10

11+

12+

1u

+

1u to 0.33u

0.1u 560k

Address Control

IIC DATA SIF SIGNAL from Tuner

IIC CLOCK

2u2

22u

Slave Address = 80h ( 1000 000* ) :Pin8=OPEN/G Slave Address = 84h ( 1000 010* ) :Pin8=H

Spectral RMS DET

-7-

IC Block DiagramsIC1001 TC4052BF

IC1002

NJM2533M

-8-

Service AdjustmentsGeneralThis set has an On-screen Service Menu system included in the CPU that allows remote operation for most of the service adjustments.

IC802 (EEPROM) ReplacementWhen IC802 (EEPROM) is replaced, IC201 (CPU) will automatically write the initial reference data into IC802 for basic TV operation. However, the bus data should be checked and some bus data should be set up before attempting the service adjustments. (See pages 9 ~ 11 for detailed information.)

Service Adjustment-11. Enter the Service MenuWhile pressing the MENU button on the television, press the Number Key 2 on the remote control unit. The Service Menu now appear.

Item No.

LB6A NO. 00 1.11101111

VER1.14 NAME DATA RFAGC 17H XX010111 2.11111000

MENU

Status Register Bit Allocations

Item Name

Data value

CHANNEL UP

[ Service Mode Display ]

2. Service Adjustments:Press the CHANNEL UP/DOWN button on the remote control handset to select the desired service menu item you want to adjust. Use the VOLUME + / - button to adjust the data. The + or - button will increase or decrease the data sequentially. VOLUME VOLUME +

CHANNEL DOWN

3. Exit from the Service MenuPress the MENU button to turn off the Service Menu display. The data which is set in the service mode is stored into the memory IC automatically.

MENU

-9-

Service AdjustmentsOn-screen Service MenuFollowing table shows the initial values which have been stored in the CPU ROM, and items for the service adjustments. When IC802 (EEPROM) is replaced, check the bus data to confirm they are the same as below. The shaded menu should be checked and be set up or readjusted according to the procedures described in the following pages. Initial Setup Data marked with an should be changed from Initial Value Data.

No0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38

Item

Description

Initial Data

Range

RFAGC Align RF AGC threshold 17 003F HPHA Alignsynctoflybackphase 10 001F VSIZE Align vertical amplitude 72 007F V DC Align vertical DC bias 22 003F VSIFT Align vertical position 08 000F V LIN Align vertical linearity 0F 001F V SC Align vertical S-correction 16 001F VCOMP Align vertical size compensation 07 0007 EWDC Align East/West DC bias 33 003F EWAMP Align East/West amplitude 06 003F EWTIL Align East/West Trapezoid 32 003F EWTOP Align East/West Top corner correction 01 000F EWBOT Align East/West Bottom corner correction 02 000F EWCSW Select control range for Corner correction 01 0001 HSCMP Align horizo