Microphone Circuit Between Microphone and Radio Receiver

AUDIO / VISUAL: AUDIO AND VISUAL SYSTEM: Microphone Circuit between Microphone and Radio Receiver
- Microphone Circuit between Microphone and Radio Receiver

DESCRIPTION

This circuit sends a microphone signal from the microphone to the radio receiver.

It also supplies power from the radio receiver to the microphone.

WIRING DIAGRAM





INSPECTION PROCEDURE

PROCEDURE

1. INSPECT RADIO RECEIVER ASSEMBLY

(a) Measure the voltage according to the value(s) in the table below.





Standard Voltage:





NG -- REPLACE RADIO RECEIVER ASSEMBLY
OK -- Continue to next step.

2. CHECK HARNESS AND CONNECTOR (OVERHEAD J/B (MICROPHONE) - RADIO RECEIVER)

(a) Disconnect the P5 overhead J/B (microphone) and E80 receiver connectors.





(b) Measure the resistance according to the value(s) in the table below.

Standard Resistance:





NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR

OK -- PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE

3. PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE

4. REPLACE RADIO RECEIVER ASSEMBLY

5. REPAIR OR REPLACE HARNESS OR CONNECTOR