Composite Image Signal Circuit (Video Distributor To Headrest Display Unit)

COMPOSITE IMAGE SIGNAL CIRCUIT (VIDEO DISTRIBUTOR TO HEADREST DISPLAY 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 front auxiliary input jacks and then transmits it to the front display unit.
- AV control unit receives the image signal from the USB (video data) and then transmits it to the front display unit and video distributor.
- Video distributor receives the image signal from the AV control unit and then transmits it to the headrest display unit.


Diagnosis Procedure


1. CHECK CONTINUITY COMPOSITE IMAGE SIGNAL CIRCUIT

1.Turn ignition switch OFF.
2.Disconnect video distributor connector and headrest display unit connector.
3.Check continuity between video distributor harness connector and headrest display unit harness connector.





*1: Headrest display unit LH
*2: Headrest display unit RH
4.Check continuity between headrest display unit harness connector and ground.





*1: Headrest display unit LH
*2: Headrest display unit RH
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 rear display unit connector.
2.Turn ignition switch ON.
3.Check signal between rear display unit harness connector using an oscilloscope.





*1: Headrest display unit LH
*2: Headrest display unit RH
Is the inspection result normal?
YES- Replace headrest display unit. Exploded View.
NO- Replace video distributor. Service and Repair.