Maintenance | en
17
Bosch Security Systems, LLC
Customer Maintenance Manual
2020-07 | 01 | F.01U.387.060
5.5
ANR troubleshooting
ANR
Troublehoot Speaker
Troubleshoot Mic
Troublehoot Speaker
Troubleshoot Mic
Turn the power and
ANR on
Replace main PCBA
Measure Voltage on
J11 & J12
Measure Voltage on
J11 & J12
Verify continuity of
Overhead Wire
Adjust the ANR
Adjust the ANR
Adjust the ANR
Replace/Resolder
speaker
Replace
Boomside PCBA
Validate Speaker
Connections
Replace
Non-boomside PCBA
Replace
Non-boomside PCBA
No
No
No
No
No
No
No
No
No
No
Does audio pass
with no power?
Does ANR work?
No ANR on the headset
No, boomside
ANR doesn´t work
Does ANR work?
Does ANR work?
Does ANR work?
Are the
speakers good?
Is the voltage good?
Is the voltage good?
Is the voltage good?
Is Continuity Good?
Does ANR pass
the Talk Test?
Final Talk Test
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
No, non-boomside
ANR doesn´t work
Measure Voltage on
J11 & J12
Adjust the ANR
Replace
Overhead Wire
