Composite Image Signal Circuit (Video Distributor to AV Control Unit)

COMPOSITE IMAGE SIGNAL CIRCUIT (VIDEO DISTRIBUTOR TO AV CONTROL UNIT)


Description

- DVD is played by inserting DVD into the AV control unit.
- DVD image signals are transmitted to the front display unit and video distributor.
- AV control unit receives the image signal from the auxiliary input jacks and USB (video data) and then transmits it to the video distributor.
- Video distributor receives the image signal from the AV control unit and then transmits it to the rear display unit.




COMPOSITE IMAGE SIGNAL CIRCUIT (VIDEO DISTRIBUTOR TO AV CONTROL UNIT)


Diagnosis Procedure

1.CHECK CONTINUITY COMPOSITE IMAGE SIGNAL CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect video distributor connector and AV control unit connector.
3. Check continuity between video distributor harness connector and AV control unit harness connector.





4. Check continuity between rear display unit harness connector and ground.





Is the inspection result normal?
YES - GO TO 2.
NO - Repair harness or connector.
2.CHECK COMPOSITE IMAGE SIGNAL
1. Connect video distributor connector and AV control unit connector.
2. Turn ignition switch ON.
3. Check signal between video distributor harness connector using an oscilloscope.





Is the inspection result normal?
YES - Replace video distributor.
NO - Replace AV control unit.