Composite Image Signal Circuit (Video Distributor to Front Display Unit)

COMPOSITE IMAGE SIGNAL CIRCUIT (VIDEO DISTRIBUTOR TO FRONT DISPLAY UNIT)


Description

Video distributor receives the image signal from the DVD player, and auxiliary input jack, and then transmits it to the front display unit and rear display unit.




COMPOSITE IMAGE SIGNAL CIRCUIT (VIDEO DISTRIBUTOR TO FRONT DISPLAY UNIT)


Diagnosis Procedure

1.CHECK CONTINUITY COMPOSITE IMAGE SIGNAL CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect video distributor connector and front display unit connector.
3. Check continuity between video distributor harness connector terminal 8 and front display unit harness connector terminal 15.

8 - 15: Continuity should exist.

4. Check continuity between video distributor harness connector terminal 6 and front display unit harness connector terminal 5.

6 - 5: Continuity should exist.

5. Check continuity between front display unit harness connector terminal 15 and ground.

15 - Ground: Continuity should not exist.

6. Check continuity between front display unit harness connector terminal 5 and ground.

5 - Ground: Continuity should not exist.

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 front display unit connector.
2. Turn ignition switch ON.
3. Check signal between front display unit harness connector terminal 15 and 5.





Is the inspection result normal?
YES - Replace front display unit.
NO - Replace video distributor.