Horizontal Synchronizing (HP) Signal Circuit

HORIZONTAL SYNCHRONIZING (HP) SIGNAL CIRCUIT


Description

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





HORIZONTAL SYNCHRONIZING (HP) SIGNAL CIRCUIT


Diagnosis Procedure

1.CHECK CONTINUITY HORIZONTAL SYNCHRONIZING (HP) SIGNAL CIRCUIT





1. Turn ignition switch OFF.
2. Disconnect display unit connector M93 and AV control unit connector M43.
3. Check continuity between display unit harness connector M93
(A) terminal 8 and AV control unit harness connector M43 (B) terminal 28.





4. Check continuity between display unit harness connector M93
(A) terminal 8 and ground.





Are continuity results as specified?
YES - GO TO 2.
NO - Repair harness or connector.
2.CHECK HORIZONTAL SYNCHRONIZING (HP) SIGNAL





1. Connect display unit connector M93 and AV control unit connector M43.
2. Turn ignition switch ON.
3. Check signal between display unit harness connector M93 terminal 8 and ground.





Are voltage readings as specified?
YES - Replace AV control unit. Refer to Service and Repair.
NO - Replace display unit. Refer to Service and Repair.