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 the microphone signal from the telephone microphone assembly to the radio receiver.

It also supplies power source from the radio receiver to the telephone microphone assembly.

WIRING DIAGRAM





INSPECTION PROCEDURE

PROCEDURE

1. INSPECT RADIO RECEIVER

(a) Disconnect the radio receiver connector.





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

Standard Voltage:





Text in Illustration





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

2. CHECK HARNESS AND CONNECTOR (MICROPHONE - RADIO RECEIVER)

(a) Disconnect the telephone microphone assembly and radio receiver connectors.





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





Standard Resistance:





Text in Illustration





NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR

OK -- PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE Problem Symptoms Table