Horizontal Synchronizing Signal Circuit (Rear Display Unit To Video Distributor)

HORIZONTAL SYNCHRONIZING SIGNAL CIRCUIT (REAR DISPLAY UNIT TO VIDEO DISTRIBUTOR)





Description
In composite image (DVD and AUX images), transmit the vertical synchronizing (VP) signal and horizontal synchronizing (HP) signal from rear display unit to video distributor so as to synchronize the RGB images displayed with video distributor such as the image quality adjusting menu, etc.




Diagnosis Procedure
1.CHECK CONTINUITY HORIZONTAL SYNCHRONIZING (HP) SIGNAL CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect rear display unit connector and video distributor connector.
3. Check continuity between rear display unit harness connector and video distributor 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 HORIZONTAL SYNCHRONIZING (HP) SIGNAL
1. Connect rear display unit connector and video distributor connector.
2. Turn ignition switch ON.
3. Check signal between rear display unit harness connector and ground using an oscilloscope.





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