AVC-LAN Circuit

AUDIO / VISUAL: AUDIO AND VISUAL SYSTEM: AVC-LAN Circuit

AVC-LAN Circuit

DESCRIPTION

All audio system units that are connected to the AVC-LAN (communication bus) use it as the communication line by which they transmit switch signals.
When a +B short or GND short occurs in the AVC- LAN, the audio system fails to function normally, due to the discontinuation of communication.
In the AVC-LAN, the radio receiver assembly is the main communication center and has the correct resistance necessary for transmitting communication signals.

WIRING DIAGRAM





INSPECTION PROCEDURE

PROCEDURE

1. INSPECT RADIO RECEIVER ASSEMBLY





(a) Disconnect the R1 radio receiver assembly connector.
(b) Measure the resistance.
Standard:





NG -- REPLACE RADIO RECEIVER ASSEMBLY
OK -- Continue to next step.
2. CHECK HARNESS AND CONNECTOR (RADIO RECEIVER - STEREO COMPONENT AMPLIFIER)





(a) Disconnect the R1 radio receiver assembly connector and S23 stereo component amplifier assembly connector.
(b) Check the resistance.
Standard:





NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.
3. REPLACE STEREO COMPONENT AMPLIFIER ASSEMBLY
NG -- REPLACE RADIO RECEIVER ASSEMBLY
OK -- END