22 en | Maintenance AIRMAN 8+
2024-11 | 07 | F.01U.387.060
Customer Maintenance Manual
Bosch Security Systems, LLC
1. Connect the main cable plugs to a test circuit or power as follows.
– Refer to ANR troubleshooting, page 21 and Wiring Diagrams and Connectors, page
42 for wiring details.
– Airman8P-0210 - Connect mic+ of circuit 5.3.2 to the PJ-068 connector ring;
connect mic- of the circuit 5.3.2 to the PJ-068 connector sleeve.
– Airman8P-0211 - Connect mic+ of circuit 5.3.2 to pin 3 of the XLR connector;
connect mic- of the circuit 5.3.2 to pin 4 of the XLR connector.
– Airman8P-0212 - Connect 12-28 Vdc positive to pin 5, negative to pin 2 of the XLR
connector.
– Airman8P-0214 - Connect 12-28 Vdc positive to pin 5, negative to pin 2 of the XLR
connector.
2. Using a voltage meter, place the ground probe at J10.
3. Place the positive probe on TP14.
If the measurement is 3.3Vdc, the power regulator is good. If the measurement is
anything other than 3.3Vdc ±10%, the power regulator is bad. Replace the board.
To measure the switch functionality on the boom side, do the following:
1. If the regulator is good, verify the ANR switch is in the off position.
2. Place the positive probe at J11.
If the measurement is near zero, the switch is open.
3. Move the ANR switch to the on position.
If the measurement is at 3.3Vdc ±10%, the switch is good. If the measurement is
anything else, the switch is bad. Replace the board.
To measure the fail-safe control logic for ANR, do the following:
1. Verify the ANR switch is in the on position.
2. Place the voltage meter probe at J12 on the boom-side.
If the measurement is -6Vdc or more negative, the fail-safe logic is working properly. If
the measurement is anything more positive -6Vdc, the fail-safe logic is not working.
Replace the board.
To measure voltage and switch function on the non-boom side, do the following:
1. If the boom side is good, place the positive probe at J11 on the non-boom side.
If the measurement is near 0, the switch is open
2. Move the ANR switch to the on position.
If the measurement is at 3.3Vdc ±10%, the switch is good. If the measurement is
anything else, the switch is bad. Replace the board.
To measure the fail-safe control logic for ANR, do the following:
1. Verify the ANR switch is in the on position.
2. Place the voltage meter probe at J12 on the non-boom-side.
If the measurement is -6Vdc or more negative, the fail-safe logic is working properly. If
the measurement is more positive than -6Vdc, the fail-safe logic is not working. Replace
the board.
Notice!
For board replacement, contact Bosch ASA or a Bosch certified facility for replacement and
adjustment.
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