External microphone troubleshooting
Troubleshooting flow
Internal earpiece troubleshooting
Check for obvious blocked holes, magnetic filings or debris jamming the earpiece, broken gauze, misplaced
gaskets, dirty contacts. Clean, fix or replace if required.
Electrical tests using the Phoenix audio sweep, measure:
•
D.C. voltage plus audio at J2100
•
Same D.C. voltage plus inverse audio at J2101
RM-609
BB Troubleshooting and Manual Tuning Guide
Issue 1
COMPANY CONFIDENTIAL
Page 3 – 37
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