AUDIO AND VISUAL SYSTEM > Microphone Circuit between Microphone and Radio Receiver |
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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
1.INSPECT RADIO RECEIVER ASSEMBLY |
Measure the voltage according to the value(s) in the table below.
- Standard Voltage:
Tester Connection Switch Condition Specified Condition 3 (MACC) - Body ground Ignition switch on (ACC) 4 to 6 V
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OK | |
2.CHECK HARNESS AND CONNECTOR (OVERHEAD JUNCTION BLOCK [MICROPHONE] - RADIO RECEIVER) |
Disconnect the R8 overhead junction block (microphone) and E102 radio receiver connectors.
Measure the resistance according to the value(s) in the table below.
- Standard Resistance:
Tester Connection Specified Condition E102-3 (MACC) - R8-12 (ACC) Below 1 Ω E102-2 (MIN+) - R8-11 (MI1+) Below 1 Ω E102-5 (MIN-) - R8-10 (MIC-) Below 1 Ω E102-3 (MACC) - Body ground 10 kΩ or higher E102-2 (MIN+) - Body ground 10 kΩ or higher E102-5 (MIN-) - Body ground 10 kΩ or higher E102-6 (SGND) - Body ground 10 kΩ or higher
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OK | ||
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