SRT LAN Radar sensor S-band up-mast Service Manual · 8RT LAN radar sensor S-band up-mast S 8 Component location 9 SRT Control PCB 10 SRT PWR-DC PCB 11 SRT MOS PCB 12reventive maintenance

ENGLISH

SRT LAN Radar sensorS-band up-mastService Manual

www.navico.com/commercial

| 3Preface | SRT LAN radar sensor S-band up-mast Service Manual

Preface

DisclaimerAs Navico is continuously improving this product, we retain the right to make changes to the product at any time which may not be reflected in this version of the manual. Please contact your nearest distributor if you require any further assistance.

It is the owner’s sole responsibility to install and use the equipment in a manner that will not cause accidents, personal injury or property damage. The user of this product is solely responsible for observing maritime safety practices.

NAVICO HOLDING AS AND ITS SUBSIDIARIES, BRANCHES AND AFFILIATES DISCLAIM ALL LIABILITY FOR ANY USE OF THIS PRODUCT IN A WAY THAT MAY CAUSE ACCIDENTS, DAMAGE OR THAT MAY VIOLATE THE LAW.

This manual represents the product as at the time of printing. Navico Holding AS and its sub-sidiaries, branches and affiliates reserve the right to make changes to specifications without notice.

Governing languageThis statement, any instruction manuals, user guides and other information relating to the product (Documentation) may be translated to, or has been translated from, another language (Translation). In the event of any conflict between any Translation of the Documentation, the English language version of the Documentation will be the official version of the Documentation.

CopyrightCopyright © 2018 Navico Holding AS.

TrademarksNavico® is a registered trademark of Navico Holding AS.

Simrad® is used by license from Kongsberg.

NMEA® and NMEA 2000® are registered trademarks of the National Marine Electronics Association.

WarrantyThe warranty card is supplied as a separate document. In case of any queries, refer to the brand website of your unit or system:

www.navico-commercial.com

Compliance statementNavico declare under our sole responsibility that the product conforms with the requirements of:

• European Council Directive 2014/90/EU on Marine Equipment modified by Commissioning Directive (EU) 2018/773 - Wheelmark

The relevant declaration of conformity is available in the product’s section at the following website: www.navico-commercial.com

About this manual

Intended audienceThis manual is written for service engineers.

The manual assumes that the reader has basic knowledge about this type of equipment in regards to:

• Maintenance work to be carried out

• Nautical terminology and practices

4 | Preface | SRT LAN radar sensor S-band up-mast Service Manual

Important text conventionsImportant text that requires special attention from the reader is emphasized as follows:

¼ Note: Used to draw the reader’s attention to a comment or some important information

! Warning: Used when it is necessary to warn personnel that they should proceed carefully to prevent risk of injury and/or damage to equipment/ personnel.

Change log

Part no Date and description

988-12288-0012018-10-12

First version

Safety precautionsSafety precautions described in this section are applicable to the radar system. They are general safety precautions that are not related to any specific procedure, and they might therefore not appear elsewhere in this manual. They are recommended precautions that personnel must understand and apply during operation and maintenance of the system.

You are obliged to read these operating instructions prior to operation, and to adhere to the operating instructions in order to prevent possible danger. Prevention of danger includes that operator personnel are trained and authorized for safe operation of the equipment. We assume no liability for damage due to improper operation which could have been prevented.

The system must only be operated by persons who have passed the relevant mandatory training on the respective systems and applications. Only reading these operating instructions cannot replace such training. Persons authorized to operate, maintain and troubleshoot the system are instructed and trained by Simrad. Persons operating or servicing this radar system must be familiar with the general safety regulations and specific safety systems, and they must have passed all required training. They must have read the relevant operating instruc-tions and manuals before starting to work.

Have these operating instructions always at hand on all relevant locations, and ensure that copies are available to all operators. Operating personnel must at all times follow all safety regulations.

During normal operation, the unit can be quickly disconnected from the main power line by turning OFF the relevant circuit breaker located on the electric switchboard.

Do not replace components or make adjustments inside the unit when the voltage supply is turned ON. Always remove power and discharge to ground a circuit before touching it. Under no circumstances should any person initiate servicing or repairing the unit except in the presence of a qualified person.

Ensure unobstructed access to all operator panels, controls, and relevant switchgear cabinets in order to enable instant response to alarms.

Whenever it is necessary to disconnect the waveguide from a radar transmitter for mainte-nance purpose, the transmitter output should be terminated with a matched load. If this is not possible, care should be taken. Do not stand in front of an open-ended waveguide from which power is being radiated.

¼ Note: Main power is always present on the terminal board unless the main break from the power distribution panel of the vessel is turned off.

! Warning: Never look down a waveguide from which power is being radiated.

Warnings

High voltageRadar equipment includes high voltage that can cause injury or loss of life. Danger exists only

| 5Preface | SRT LAN radar sensor S-band up-mast Service Manual

when the units are opened, exposing internal circuits, as when servicing the equipment.

This radar has been carefully designed to protect personnel from possible injury from high voltages. Although every effort has been made to eliminate danger to personnel, no responsi-bility is accepted for any injury or loss of life suffered in connection with this equipment.

Radio frequency radiationHarmful effects (particularly to the eyes) may be caused by exposure of any part of the human body to high power radio frequency radiation.

The system is however designed to always disable the microwave radiation when the antenna is not rotating.

Configuration Distance 100 W/m2 point (m)

Distance 50 W/m2 point (m)

Distance 10 W/m2 point (m)

30 KW Transceiver

12’ S-band Antenna

18

(at antenna surface)

18

(at antenna surface)0.4

X-Ray radiationThis radar system does not generate X-ray radiation.

6 | Contents | SRT LAN radar sensor S-band up-mast Service Manual

Contents

8 Component overview8 SRT LAN radar sensor S-band up-mast

8 Component location

9 SRT Control PCB

10 SRT PWR-DC PCB

11 SRT MOS PCB

12 Preventive maintenance12 External inspection of the radar sensor

12 Internal inspection of the SRT LAN S-band up-mast transceiver

13 Magnetron replacement

14 Software

14 Tuning and performance monitor calibration

18 Diagnostics18 SRT PWR-DC PCB LED indicators

18 Brushless motor controller PCB LED indicators

19 SRT Control PCB

20 Troubleshooting20 Symptom table

20 Potential cause and corrective action table

20 TXRX missing data

21 Antenna failures

22 Main possible failures

24 Fault repair24 Opening the covers

24 Performance monitor arm replacement

24 Magnetron replacement

25 PCBs and RF Head disassembly

25 RF detector and LNFE replacement

26 Limiter replacement

26 Circulator replacement

27 SRT PWR-DC PCB replacement

27 SRT MOS PCB replacement

28 SRT Control PCB replacement

28 SRT Mini PSU PCB replacement

28 SRT LAN CPU PCB replacement

29 Motor unit disassembly

29 Brushless motor replacement

30 Gearbox with the driving gear replacement

30 Noise diode replacement

30 Brushless controller replacement

31 Bearing reader PCB replacement

| 7Contents | SRT LAN radar sensor S-band up-mast Service Manual

31 RF cable replacement

31 Rotating joint replacement

32 SRT LAN S-band up-mast transceiver replacement

33 Spare parts

34 System diagrams34 Transceiver internal interconnection diagram

8 | Component overview | SRT LAN radar sensor S-band up-mast Service Manual

Component overview

SRT LAN radar sensor S-band up-mast

A

B

E

CD

F

GH

I J K

Description

A Antenna 12 ft

B SRT LAN S-band up-mast transceiver

C Rotating joint

D Performance monitor arm

E Cover - magnetron side

F Cover - motor side

G Safety switch

H Grounding terminal

I Power cable

J Ethernet cable

K Heater kit connector location (optional)

Component location

A

B

CD

E

F

H

G

Motor side Magnetron side

A Motor unit

B RF detector and LFNE

11

| 9Component overview | SRT LAN radar sensor S-band up-mast Service Manual

C RF cable

D Noise diode

E Brushless controller

F Bearing reader PCB

G PCBs location and RF head frame

H Magnetron

Component Motor side cover Magnetron side cover

RF cable √

Mini PSU PCB √

SRT LAN CPU PCB √

Bearing reader PCB √

Magnetron √

Brushless controller √

Motor unit √

Noise diode √

S-band gearbox with driver steel gear

√

Circulator √ √

SRT Control PCB √ √

SRT MOS PCB √ √

SRT PWR-DC PCB √ √

RF Detector and LNFE √ √

SRT Control PCB

Connector Purpose

TB1 Interlock

TB5 Performance monitor

TB6 Cable for the optical read-out connection

10 | Component overview | SRT LAN radar sensor S-band up-mast Service Manual

Connector Purpose

TB2 Motor signals

P1 Controls to srt_pwr_dc

TB7 Accelerometer data signal

P2 Power from SRT PWR-DC

J12 Lan connector

J15 Trigger pull

J18 Trigger push

J17 Magnetron current

P3 Signal to display

TB8 Safety switch connector

J19 Video out

J14 Video in

J11 Tuning input

TB3 Signal from/to l.n.f.e.n.i.f.

J5 Noise source

J1 Noise detect

SRT PWR-DC PCB

EB

C

F

D

A

Label Purpose

A P1 PW_ON (normally open, closed puts the TXRX in STBY)

B DL2 LED ON (green): + 5,1 V DC OK

C DL3 LED ON (red): High voltage OK (700 V DC for modulator)

D R27, R32, R42 Modulation H .V. Adjustments factory made

E DL1 LED ON (green): + 52 V DC input OK

F TB2 Main Power input

| 11Component overview | SRT LAN radar sensor S-band up-mast Service Manual

SRT MOS PCBA

B

C

D

SRT-MOS973271A( ) Rev. ( )

Label Purpose

A K Magnetron cathode terminal

B FIL Magnetron filament terminal

C GND Ground wire

D Transparent cover

12 | Preventive maintenance | SRT LAN radar sensor S-band up-mast Service Manual

Preventive maintenanceFollow the procedures that are described in this chapter to ensure the radar system operates at its optimum.

! Warning: High voltage is present inside the unit. Do not open the cabinet cover before the main radar breaker has been turned to the off position. Switch off the power supply before connecting measurement instruments inside the unit.

! Warning: Before starting any maintenance or repair work, it is mandatory that, for the safety of personnel, all high-voltage capacitors be short circuited by means of an insulated screwdriver or other suitable tool.

¼ Note: All work performed on the transceiver must be recorded in the unit log book.

External inspection of the radar sensorThe operation is performed twice a year.

1 On the electric switchboard, switch OFF the radar main breaker and place a card reading WORK IN PROGRESS - DO NOT SWITCH ON

2 Turn off the power supply unit

3 Place a card at the radar controls stating unit is being serviced

4 Check that no parts of the plastic covering the up-mast transceiver have been painted

5 Check the state of the casing preservation

6 Unscrew and grease the 4 fastening screws of the cover to avoid corrosion and facilitate future inspections

7 If paint has been scratched off at any point

• Degrease the part to be painted

• Scuff lightly with emery paper

• Dust off with a dry brush

• Apply a rust resistance paint system suited to harsh environments. Refer to paint supplier instructions for details

8 On the electric switchboard, set the radar main breaker to ON and remove the warning card reading WORK IN PROGRESS - DO NOT SWITCH ON

9 Turn on the power supply unit.

Internal inspection of the SRT LAN S-band up-mast transceiverThis operation should be performed twice a year.

1 On the electric switchboard, switch OFF the radar main breaker and place a card reading WORK IN PROGRESS - DO NOT SWITCH ON

2 Turn off the power supply unit

3 Position the antenna so it is facing the bow of the vessel

4 Unscrew the six nuts securing each cover

5 Open the cover fully

6 Check for any signs of water ingress

Connectors and cables inspection1 Check the condition of all connector contacts (pins and plugs)

2 Clean with dry brush if necessary

2

| 13Preventive maintenance | SRT LAN radar sensor S-band up-mast Service Manual

3 Repair or replace any corroded or defect parts

Mechanical inspection1 Check the gear integrity

2 Add a thin coating of grease if the main gear shows lack of lubrication

3 Check that there are no loose screws inside the housing

4 Replace or tighten screws as necessary.

General cleaningInternal cleaning is necessary only when a visible buildup of dirt is present. Use IPA alcohol if necessary.

Dry any damp surfaces by using a soft cloth.

Final steps1 Grease the fastening screws to prevent corrosion and ease future removal

2 Apply a small amount of silicone grease to the O-ring to refresh the water sealing

3 Secure the cover in place


5 Turn on the power supply unit

Magnetron replacementThis operation should be performed as required or after 8000 hours of operation

Hardware1 On the electric switchboard, switch OFF the radar main breaker and place a card reading

WORK IN PROGRESS - DO NOT SWITCH ON

2 Switch safety switch to the Off position

3 Remove the six nuts securing the magnetron side cover

4 Move the cover towards the outside

¼ Note: When the cover is free ensure that the safety chain is properly anchored both to the cover and the structure of the SRT S-band up mast.

5 Open the cover fully

¼ Note: The cover should be supported by the chain. The top housing is very heavy and if unsecured and accidentally allowed to close, it could cause serious injuries.

6 Remove the magnetorn cables from the cable tie

7 On the SRT MOS PCB remove the four nuts (A) securing the protective transparent cover (B) over the magnetron high voltage connections

8 Remove the two nuts securing the magnetron cables taking note of their position

9 Remove the six screws securing the magnetron (C)

10 Remove the magnetron (D)

A

C

B

D


11 Before fitting the new magnetron spread a layer of silicone compound on the contact surface to improve the magnetron’s heat dissipation

12 In order to install the new magnetron, perform the removal steps in reverse order, leaving the transceiver housing open at this stage

13 Switch the safety switch to the ON position


15 Warm up the radar for 30 minutes

16 Following the procedures of display manual, perform the VCO calibration

17 Perform the following operation:

• on the SRT PWR-DC PCB remove the link P1

• on SRT Control PCB, position S1 on 0 (zero)

18 Close the cover

SoftwareThere is a timer that counts the number of hours the magnetron has been transmitting. The system gives a warning when the magnetron is close to the end of its expected lifetime.

From the radar data dialog, it is possible to view the hour count and the magnetron end of life status (which reports OK or FAIL). When the magnetron is replaced, the timer should be reset.

Access the Installation dialog, and select the magnetron timers reset option.

Tuning and performance monitor calibrationAfter magnetron replacement, it is required to test the following:

1 Tuning adjustment

2 Performance monitor adjustment (if needed).

3 Timers reset

Tuning adjustmentSet radar on 48Nm. Set manual tuning to 50% and verify that the radar video performance is good with the tuning indicator bar at 80%.


It is mandatory to carry out tuning adjustment following replacement of the magnetron. Please follow the procedure below.

1 From the Menu, select Settings and then Access control.

2 Enter password “QWERTY” to enable the Service mode.

3 From the Settings dialog go to Radar and select Installation...

4 Select Extended tune

Extended tuneThe extended tune allows for initial tuning and adjustment of the radar system.

A

B

C

D

Adjustment options

A Tuning

B Pre-STC

C Performance monitor


Adjustment options

D Sidelobe suppression

¼ Note: The status and controls icons are located on the left side of the extended tune image. The adjustment settings on the right side are to be carry out by the service engineers.

Auto coarse tune adjustmentThe coarse tune can be automatic or manual. The Auto coarse tune adjustment is used to do initial automatic tuning of the radar system and to adjust the radar when a new magnetron has been fitted. Automatic tuning will work well in most installations. Manual tuning is used if it is required to adjust the result from an automatic tuning.

When the automatic tuning is selected, a progress bar indicates status. The value is stored automatically when the tuning is completed.

Coarse tuneBe sure that radar is on 24 Nm range. Set the Fine Tune on manual at 50% .

STC and FTC filter at 0%. IR off. Performance monitor On.

Adjust the Coarse Tune to obtain maximum echoes brightness on the screen with 80% on tune bar.

¼ Note: Adjusting the Coarse tune from 0% to 100% causes the echo brightness and target detection to increase then decrease again as the tuning is increased. Adjust the course tune to give maximum echo brightness and target detection. Some small targets that were previ-ously hidden will appear on the panel.

The Coarse tune position will be automatically saved.

Performance monitor adjustmentThe performance monitor is used to check the output performance of the transceiver. It is very important that it is initially adjusted at time of installation, and when the magnetron is replaced, when power output is still optimal.

Ring Thickness must be 2 Nm with radar tuned. Set distance from 21Nm to 23 Nm.

Performance monitor open (A)Select the Performance monitor open control and adjust to get an opening of about 50 - 100 degrees. This signal comes from the external PM lamp.

Performance monitor Distance (B)Activate the Distance control and adjust the distance so that the ring is completely visible on 24 NM range.

Noise Diode (C)Select the Noise Diode control and adjust so that the ring brightness is visible above the noise floor.

A

BC


Timers reset There is a timer to counts the number of hours the magnetron has been transmitting. The system gives a warning when the magnetron is close to the end of its expected lifetime.

From the radar data dialog, it is possible to view the hours count and the magnetron end of life status (which reports OK or FAIL).

When the magnetron is replaced the timer must be reset.

The transceiver lifetime cannot be reset, however, all the other counters will be reset.

18 | Diagnostics | SRT LAN radar sensor S-band up-mast Service Manual

Diagnostics

SRT PWR-DC PCB LED indicators

B

C

A

D

PCB label LED color Indication

A Link/P1 default open

B DL2 Green LED ON: + 5,1 V DC OK

C DL3 Red HV and radiation ON

D DL1 Green LED ON: + 52 V DC input OK

Brushless motor controller PCB LED indicators

LED Purpose

OK (green) Normally ON. It signals the correct functioning of the equipment. It switches off in the event of any anomaly “except for the intervention of the nominal current” and for the Min/Max voltage protection intervention (reversible alarm).

IN (red) Normally OFF. In the event of switching on, it indicates that the limit set of the nominal current of the motor has been exceeded (reversible alarm).

ST (red) Normally OFF. It signals when the maximum temperature set of the dissipater has been reached. The intervention causes the converter to block and the memorization of the alarm. The alarm can be reset when the dissipater has cooled down. Switch off and then switch back on the power supply to reset the function.

3

| 19Diagnostics | SRT LAN radar sensor S-band up-mast Service Manual

LED Purpose

OC (red) Normally OFF. This signal could occur due to a short circuit between the terminals of the motor or a short circuit of an output towards Earth. The intervention causes the converter to block and the memorization of the alarm.

Switch off the power supply, eliminate the cause and switch back on the power supply.

AH (red) Normally OFF. The alarm is visualized due to the lack of a Hall signal or for the lack of a power supply to the Hall cells. The intervention causes the converter to block and the memorization of the alarm.

SRT Control PCB

Color labels on SRT Control PCB:

• Red circles - Test points

• Green circles - LEDs

• Blue circles - Jumpers

Opening the metallic cover gives access to EEPROM U18.

Magnetron life time and internal transceiver setup is resident on this device.

In case of SRT Control PCB replacement we suggest to also swap the memory to transfer the original setting to the new PCB.

¼ Note: Please use standard anti-static precautions to avoid damage to the EEPROM from electrostatic discharge.

PCB label LED color Indication

A D23 Green TX / Red RX Tx Rx Comm (RS232 or RS422)

B D26 Green Line ok /Power out Ok

C D3 Red

Green

Blue

ST-BY

Radiation and antenna in rotation

20 | Troubleshooting | SRT LAN radar sensor S-band up-mast Service Manual

Troubleshooting

Symptom tableSymptom Potential cause

Transceiver does not turn on 1, 3, 7

Transceiver cannot be controlled 7

Transceiver performance is low 4, 7

Transmitter does not generate RF 2, 5, 6, 7

Potential cause and corrective action table

Potential cause Check Corrective action

1 Power supply is damaged Check 52 V on TB2 on SRT PWR-DC PCB; if missing check line (220 V).

If it is 220V replace the power supply.

2 SRT PWR-DC PCB is damaged

Check the 700 V on TB3 and the 15 V on TB1.

If a voltage is missing replace SRT PWR-DC PCB.

3 Video signal interrupted Check video signal quality. Repair damaged video cable.

4 Magnetron is in End Of Life Check fail and the magnetron work time.

Replace the magnetron.

5 SRT MOS PCB is damaged Check TR-Pull and TR-Push on SRT Control PCB.

If the two signals are presents replace the SRT MOS PCB.

6 SRT Control PCB is damaged

Check on SRT Control PCB TR-Push, TR-Pull.

If the two signals are missing replace the SRT Control PCB.

7 Call assistance Contact the manufacturer’s service department.

TXRX missing data

Step Check Yes No Corrective action

1 Presence of 52 V on SRT PWR-DC PCB TB1 and Mini CPU .

√ External problem or connection.

2 Led D1 SRT PWR-DC PCB lighted. √ Check the voltage (52 V) on SRT PWR-DC PCB.

3

Led D1 SRT PWR-DC PCB lighted. √ Problem of interconnection.Check the voltage (52 V) on SRT

PWR-DC PCB.√

4

Led D1 SRT PWR-DC PCB lighted. √ Replace the SRT PWR-DC PCB.Check the voltage (52 V) on SRT

PWR-DC PCB.√

5

Led D2 SRT PWR-DC PCB lighted. √ Replace the SRT PWR-DC PCB

(After that, repeat step three and continue).

6

Led D1 SRT_PWR lighted. √ Check if the condition of the SRT Control PCB’s LEDs are met.Led D2 SRT_PWR lighted. √

4

| 21Troubleshooting | SRT LAN radar sensor S-band up-mast Service Manual


7

The condition of the SRT Control PCB’s LEDs are met.

√ Contact manufacturer’s service department.

The condition of the SRT Control PCB’s LEDs are met.

√ Replace the SRT Control PCB.

Antenna failures

Antenna missing data


1 Check HL IN and AZ IN signal on the SRT Control PCB.

√ Replace Bearing reader PCB.


√

Replace the SRT Control PCB.3 Check HL OUT and AZ OUT signals on

the SRT Control PCB.√


√

Problem external of TXRX or interconnection problem.8 Check HL OUT and AZ OUT signals on

the SRT Control PCB.√

¼ Note: Follow the order of steps for proper control of the system.

The antenna doesn’t rotate


1

Check that the Brushless controller is on.

Check that the Fail LED is on.

√ The controller is not enabled.

Switch ON the safety switch.

Switch ON the interlock.

Check the presence of 10V on gray wire on the Motor controller connector.

√

Check if 10V is pressent on gray wire on the Motor controller assy.

√ Check the EN connection (gray wire) from the SRT Control PCB to the Motor controller.

EN connection (gray wire) is present from the SRT Control PCB to the Motor controller

√ Replace the SRT Control PCB.

√ Restore the connection.

2



√ Check that voltage (15V) arrives at the TB2 connector (SRT Control PCB).√

3



Check that voltage (15V) arrives at the TB2 connector ( SRT Control PCB).

√ Substitute the connection cable of the SRT Control PCB Brushless controller.√

√

22 | Troubleshooting | SRT LAN radar sensor S-band up-mast Service Manual


4



Check that voltage (15V) arrives at the TB2 connector ( SRT Control PCB).

√ Check that voltage (52V) arrives at the Brushless controller TB.√

√

5



Check that voltage (15V) arrives at the TB2 connector (SRT Control PCB).

Check that voltage (52V) arrives at the Brushless controller TB.

√ External problem outside the SRT S-band up-mast.

√

√

√

Main possible failures

Failure message Corrective action Other

Magnetron heat fail Replace the SRT MOS PCB. If the problem still exists replace the SRT PWR-DC PCB.

24 VCO fail Replace the SRT PWR-DC PCB.

+15 fail Replace the SRT PWR-DC PCB.

RX fail Replace the SRT Control PCB.

CRC fail Replace the SRT Control PCB.

Interlock open Check if the door is correctly closed. If it is, replace the internal safety switch.

Safety switch open Close the safety switch.

+48 Fail Replace the power supply.

Front end fail Replace the RF detector LNFE assy.

Magnetron EOL Replace the Magnetron.

Modulation fail and low PWR line level

Replace the Magnetron. If the problem still exists replace the SRT MOS PCB.

Poor quality image on the screen (performance

is degraded)

Proceed to automatic tuning. If the tuning bar is too low replace the RF detector LNFE assy.

If the poor quality image is still on the screen replace the S-band TR Limiter.

Big ball on the center of the screen and weak signal from far ranges

echoes

The waveguide is damaged. Proceed to a full inspection of the waveguide. Dry it if it is necessary and if it seems corroded then replace the duplexer and/or the S-band TR Limiter and/or the Magnetron and/or the RF detector and LNFE assy.

Low PWR level Replace the diode assembly.

No ring on the screen using performance

monitor test

Replace the diode assembly.

TX/RX overheating Check the environment of the TX/RX room.

Radar fail Check the SRT LAN CPU PCB and replace it if broken.

Check the external LAN cable.

Check the internal LAN connection.

| 23Troubleshooting | SRT LAN radar sensor S-band up-mast Service Manual

Failure message Corrective action Other

No spoke data Check the Bearing reader PCB and replace it if broken.

Check the SRT Control PCB and replace it if broken.

Check the connection cable from the SRT Control PCB to the Bearing reader PCB.

24 | Fault repair | SRT LAN radar sensor S-band up-mast Service Manual

Fault repair ¼ Note: Maintenance must only be carried out after the equipment has been switched off.

Before commencing with repair work, ensure the spare part is available, and its condition has been verified as good.

! Warning: The replacement operations must be carried out exclusively by skilled personnel with appropriate equipment training.

Opening the covers1. On the electric switchboard, switch OFF the radar main breaker and place a card reading


2. Switch the safety switch to the OFF position

3. Remove the six nuts securing the motor side cover and/or the six nuts securing the magnetron side cover

4. Move the covers towards the outside

¼ Note: When the covers are free ensure that the safety chain is properly anchored both to the covers and the structure of the SRT S-band up mast.

5. Open the covers fully

¼ Note: The covers should be supported by the chain. The top housing is very heavy and if unsecured and accidentally allowed to close, it could cause serious injuries.

Performance monitor arm replacement1. On the electric switchboard, switch OFF the radar main breaker and place a card reading



3. Remove the four screws securing the performance monitor arm (A)

4. Remove the Performance monitor arm (B)

B

A

5. In order to install the new Performance monitor arm, perform the removal steps in reverse order, leaving the SRT LAN S-band up-mast transceiver housing open at this stage

6. Switch the safety switch to the ON position

7. On the electric switchboard, set the radar main breaker to ON and remove the warning card reading WORK IN PROGRESS - DO NOT SWITCH ON

Magnetron replacementSee “Magnetron replacement” on page 13

5

| 25Fault repair | SRT LAN radar sensor S-band up-mast Service Manual

PCBs and RF Head disassembly1. Follow the steps for “Opening the covers” on page 24

2. Unscrew and remove the RF cable connector from the duplexer

3. From the motor side, remove the two screws (A)

4. From the magnetron side remove the two screws (B)

5. Remove the PCBs and the RF Head frame by pulling them towards the outside

B A

¼ Note: If any cable prevents the frame from moving, disconnect their connector taking note of its position.

RF detector and LNFE replacement1. Follow the steps for “Opening the covers” on page 24

2. Remove the PCBs and RF Head frame. See “PCBs and RF Head disassembly” on page 25

3. Disconnect the connectors that are connected to the RF detector and LNFE, taking note of their positions.

4. Remove the two screws (A)

5. Remove the two screws and nuts (B)

6. Remove the RF detector and LNFE (C)

C

A B

7. In order to install the new RF detector and LNFE, perform the removal steps in reverse order




Limiter replacement1. Follow the steps for “Opening the covers” on page 24


3. Remove the RF detector and LNFE. See “RF detector and LNFE replacement” on page 25

4. Remove the four screws securing the Limiter(A)

5. Remove the Limiter (B)

A

B

A

6. In order to install the new Limiter, perform the removal steps in reverse order



Circulator replacement1. Follow the steps for “Opening the covers” on page 24



4. Remove the Limiter. See “Limiter replacement” on page 26

5. Unscrew the four screws securing the duplexer (A)

6. Remove the duplexer (B)

7. Remove the RF filter

8. Remove the four screws securing the circulator to the magnetron

9. Remove the circulator (C)

A

A

BC

10. In order to install the new circulator, perform the removal steps in reverse order

11. Switch the safety swtich to the ON position

12. On the electric switchboard, set the radar main breaker to ON and remove the warning card


reading WORK IN PROGRESS - DO NOT SWITCH ON

SRT PWR-DC PCB replacement1. Follow the steps for “Opening the covers” on page 24


3. Remove the cabling connectors, taking note of their position

4. Remove the eleven M3 nuts and two screws fixing the SRT PWR-DC PCB

5. Remove the SRT PWR-DC PCB (A)

A

6. In order to install the new SRT PWR-DC PCB, perform the removal steps in reverse order



SRT MOS PCB replacement1. Follow the steps for “Opening the covers” on page 24




5. Remove the four nuts (A) and tree screws (B) securing the SRT MOS PCB

6. Remove the four nuts securing the protective transparent cover (C)

7. Remove the cable tie

8. Remove the protective transparent cover (D)

9. Remove the two nuts securing the magnetron cables, taking note of their position

10. Remove the four spacers (E)

11. Remove the SRT MOS PCB

B

DE

EC

C

A

A

12. In order to install the new SRT MOS PCB, perform the removal steps in reverse order




SRT Control PCB replacement1. Follow the steps for “Opening the covers” on page 24




5. Remove the four nuts securing the SRT Control PCB (A)

6. Remove the SRT Control PCB (B)

B

A

A

7. Before installing the new SRT Control PCB remove the EEPROM U18 from the old SRT Control PCB and replace it with the one on the new SRT Control PCB. If this operation is skipped the unit must be set up manually from blank to recover values and settings stored in the old EEPROM.

8. In order to install the new SRT Control PCB, perform the removal steps in reverse order



SRT Mini PSU PCB replacement1. Follow the steps for “Opening the covers” on page 24

2. Follow the steps for “PCBs and RF Head disassembly” on page 25


4. Remove the six screws securing the Mini PSU PCB

5. Remove the Mini PSU PCB

6. In order to install the new Mini PSU PCB, perform the removal steps in reverse order



SRT LAN CPU PCB replacement1. Follow the steps for “Opening the covers” on page 24

2. Follow the steps for “PCBs and RF Head disassembly” on page 25

3. Remove the cabling connectors from the Mini PSU PCB, taking note of their position

4. Remove the six screws securing the Mini PSU PCB

5. Remove the Mini PSU PCB


6. Remove the ethernet cable connector

7. Remove the six spacers securing the SRT LAN CPU PCB

8. Remove the SRT LAN CPU PCB

9. In order to install the new SRT LAN CPU PCB, perform the removal steps in reverse order

10. Switch the safety switch in ON position


Motor unit disassembly The motor unit is composed of the brushless motor and the gearbox with the driving gear.

1. Follow the steps for “Opening the covers” on page 24

2. Remove the cabling connectors taking note of their position

3. Remove the two screws securing the motor unit (B)

4. Partially unscrew the two screws (A)

5. Remove the motor unit (C)

CB

A

Brushless motor replacement1. Follow the steps for “Opening the covers” on page 24

2. Remove the motor unit. See “Motor unit disassembly” on page 29

3. Rotate the riving gear until the head of the screw isn’t visible anymore in the hole on the gearbox (A) and partially unscrew it.

¼ Note: Do not remove the screw.

4. Unscrew the four screws securing the brushless motor (B)

5. Remove the brushless motor (C)

A

B

B

C

6. In order to install the new brushless motor, perform the removal steps in reverse order




Gearbox with the driving gear replacement1. Follow the steps for “Opening the covers” on page 24

2. Remove the brushless motor. See “Brushless motor replacement” on page 29

3. Remove the gearbox with the driving gear

4. In order to install the new gearbox with the driving gear perform the removal steps in reverse order



Noise diode replacement1. Follow the steps for “Opening the covers” on page 24

2. Disconnect the connectors from the noise diode, taking notes of their position

3. Unscrew to remove the noise diode (A)

A

4. In order to install the new noise diode, perform the removal steps in reverse order



Brushless controller replacement1. Follow the steps for “Opening the covers” on page 24

2. Disconnect the cabling connectors from the brushless controller, taking notes of their position

3. Remove the two screws securing the brushless controller (A)

4. Remove the brushless controller (B)

AB

5. In order to install the new brushless controller, perform the removal steps in reverse order




Bearing reader PCB replacement1. Follow the steps for “Opening the covers” on page 24

2. Remove the cabling connector taking note of its position

3. Remove the two screws securing the bearing reader PCB (A)

4. Remove the Bearing reader PCB (B)

B

A

5. In order to install the new bearing reader PCB, perform the removal steps in reverse order



RF cable replacement1. Follow the steps for “Opening the covers” on page 24

2. Unscrew the RF cable from the rotating joint (A) and from the duplexer (B)

3. Remove the RF cable.

A

B

4. In order to install the new RF cable, perform the removal steps in reverse order



Rotating joint replacement1. Follow the steps for “Opening the covers” on page 24

2. Outside the SRT LAN radar sensor s-band up-mast, unscrew and disconnect the RF antenna cable from the rotating joint (A)

3. Secure the antenna to avoid any damage during removal

4. Remove the twelve nuts securing the antenna (B)

5. Remove the antenna

6. Remove the four nuts securing the rotating joint (C)


7. Unscrew and disconnect the RF cable from the lower part of the rotating joint. See “RF cable replacement” on page 31

C

B

A

B

8. In order to install the new rotating joint, perform the removal steps in reverse order



SRT LAN S-band up-mast transceiver replacement1. On the electric switchboard, switch OFF the radar main breaker and place a card reading



3. Unscrew and disconnect the RF antenna cable from the rotating joint (A)

4. Secure the antenna to avoid any damage during nuts removal

5. Remove the twelve nuts securing the antenna (B)

6. Remove the antenna

7. Disconnect any cables from the SRT LAN S-band up-mast transceiver, taking note of their position

8. Remove the nut securing the grounding cable to the grounding terminal

9. Remove the grounding cable

10. Remove the fasteners securing the SRT LAN S-band up-mast transceiver (C)

11. Remove the SRT LAN S-band up-mast transceiver

B

A

B

C

12. In order to install the new SRT LAN S-band up-mast transceiver, perform the removal steps in reverse order



| 33Spare parts | SRT LAN radar sensor S-band up-mast Service Manual

Spare partsThe most up-to-date spare parts list is available at:

www.navico-commercial.com

Part number Description Compatible

151-10626-001 SRT LAN, 30U S-band, replacement unit

30 kW transceiver

151-10627-001 SRT LAN, 30U HSC S-Band, replacement unit

30 kW transceiver

000-14826-001 Mini PSU 12/25/30 kW transceiver

000-14827-001 SRT LAN CPU 12/25/30 kW transceiver

000-10671-001 SRT PWR-DC 12/25/30 kW transceiver

000-10673-001 SRT MOS 25/30 kW transceiver

000-10674-001 SRT Control 12/25/30 kW transceiver

000-14331-001 S-band gearbox with driver steel gear 30 kW transceiver

SP-47V201P001-001 Brushless controller 30 kW transceiver

SP-304823A1-001 RF Detector and LNFE 30 kW transceiver

SP-89A505P003-001 Circulator 30 kW transceiver

SP-89A505P040-001 Limiter 30 kW transceiver

SP-305356A1-001 Magnetron 30 kW transceiver

SP-302237A2-001 Noise diode 30 kW transceiver

SP-305279A1-001 Brushless motor 30 kW transceiver

SP-305358A1-001 Rotating joint 30 kW transceiver

000-10681-001 Bearing reader PCB 12/25/30 kW transceiver

SP-304958A1-001 Performance monitor arm 30 kW transceiver

SP-56C034P007-001 RF Cable 30 kW transceiver

6

34 | System diagrams | SRT LAN radar sensor S-band up-mast Service Manual

System diagrams

Transceiver internal interconnection diagramG

ND

GN

D

RE

DB

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CK

GR

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Yellow

Red-Brown

White

Violet

Green

Gray-Black

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4

RM

RM

05

TB

5

IL IL

TB

1

J1 1 2

J2

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IL IL

RM

05

Inte

rlock

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S2

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TB2

HALL2

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VD

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T

1

P3 TO Mini PSU

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

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

J2

VD In

Vin

GND

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2

P1

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P2

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GN

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TB

2

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GN

D

AN

TS

R

GN

D

54321 54321

1

2

3

4

5

1

2

3

4

5

1 234 65

12

Black1 mm

²Black1 m

m²

Red 1 mm

²Red 1 m

m²

032-21555-06

2 1

F1

10

A

Red 1 mm

²

Red 1 mm

²

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112

2

Black 1 mm

²

Black 1 mm

²

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910

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White 0.35mm²Black 0.56mm²Grey 0.35mm²White 0.35mm²White 0.35mm²

Violet 0.35mm

²

Violet 0.35mm

²

1 Violet 0.35mm

²

2 Grey 0.35m

m²

3 Red 0.56mm

²

4 Black 0.56mm

²

5 Green 0.35m

m²

6 White 0.35m

m²

PCBM

ini PSUPCB

Kahaway CPU

LAN

2 Red 0.8mm

²

1 Black 0.8mm

²

1 Black 0.5mm

²

2 Red 0.5mm

²

SAFETY

Black 0.35 mm

²

Violet 0.35 mm

²

SRT Control PCB

SRT PWR-D

C PCB

SRT MO

S PCB

POWER

Black 1 mm²Red 1mm²

HEATER

301885A5

302550A10

302550A10

305051A1

CAB-000002-002

304441A2

303296A7

303296A3

302550A5

304278A1

302898A2

305103A1

032-20745-05

Black 0.35 mm

²

Violet 0.35 mm

²

032-21556-06

032-21557-06

Red 1 mm

²

Red 1 mm

²Black1 m

m²

Black1 mm

²

Black 1mm

²

Black 1mm

²Red 1m

m²

Red 1mm

²

302898A1

304219A1

304217A1

302445A1

305149A1

Black 1 mm²Red 1mm²

Red 1 mm

²

Red 1 mm

²

OPTIO

NA

L

R1 18ohm 180W

HEATER Board

J1

R2 18ohm 180W

032-22553-00

7

*988

-122

88-0

01*

www.navico.com/commercial

Documents

SRT LAN Radar sensor S-band up-mast Service Manual · 8RT LAN radar sensor S-band up-mast S 8 Component location 9 SRT Control PCB 10 SRT PWR-DC PCB 11 SRT MOS PCB 12reventive maintenance