Microphone Circuit Between Overhead J/B and Multi-Display

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Microphone Circuit between Overhead J/B and Multi-display

DESCRIPTION

This circuit sends a microphone signal from the overhead J/B to the multi-display. It also supplies power from the multi-display to the overhead J/B.

WIRING DIAGRAM





INSPECTION PROCEDURE

PROCEDURE

1. CHECK HARNESS AND CONNECTOR (OVERHEAD J/B - MULTI-DISPLAY)




(a) Disconnect the overhead J/B connector R5 and multi-display connector J51.
(b) Measure the resistance according to the value(s) in the table below.
Standard resistance:






NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.
2. INSPECT MULTI-DISPLAY




(a) Reconnect the multi-display connector J51.
(b) Measure the voltage according to the value(s) in the table below.
Standard voltage:






NG -- REPLACE MULTI-DISPLAY
OK -- PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE