Instruction manual

7-10
5. Replace the Motherboard (DCMB).
Procedure F
On the DCDC Module, the green NORMAL LED is “OFF”, the yellow TROUBLE LED is “ON”,
D12 “OFF”, D11 “OFF”, D10 “ON”, and on the SALL-15S module the PWR LED is “ON”, an
amplified speaker power output wiring trouble condition has occurred. An amplified speaker
power output wiring trouble condition might be caused by:
1. Missing EOLR resistor on the amplified speaker power output.
2. The Amplified Speaker Power Output field wiring is open or shorted.
3. A fuse on the SALL-15S module is blown.
4. A faulty SALL-15S module.
5. A faulty Motherboard (DCMB).
Perform the following:
1. Check EOLR resistor and verify that it is a UL LISTED a 10K Ohm, 5% Tolerance, 1W
Resistor.
2. Verify that the EOLR resistor is properly in place.
3. Verify that the Amplified Speaker Power Output field wiring is intact.
4. Verify that all fuses on the SALL-15S module are intact. (See Figure 9-8 for locations)
5. If trouble does not clear, remove SPKR AMP appliance circuit from Motherboard and place a
10K Ohm 1/4W minimum resistor on the output. If PWR LED turns “OFF”, the trouble is in the
Speaker Power NAC Circuit. If trouble does not clear, replace the SALL-15S module.
6. Replace the Motherboard (DCMB).
Procedure G
On the DCDC Module, the green NORMAL LED is “OFF”, the yellow TROUBLE LED is “ON”,
D12 “OFF”, D11 “OFF”, D10 “ON”, and the AMP LED on the SAA/SALL module is “ON”, an
amplifier trouble condition has occurred. An amplifier trouble condition may be caused by:
1. A faulty SAA/SALL module.
2. A faulty DCDC module.
3. A faulty Motherboard (DCMB).
4. Missing or Faulty MDX-2 Module or missing Shunt PCB.
Perform the following:
1. Replace the SAA/SALL module.
2. Replace the DCDC module.
3. Replace the Motherboard (DCMB).
4. If MDX-2 Module is installed, remove MDX-2 and replace with Shunt PCB. If Trouble clears,
replace MDX-2 Module.
Procedure H
On the DCDC Module, the green NORMAL LED is “OFF”, the yellow TROUBLE LED is “ON”, and
D12 “ON”, D11 “ON”, D10 “OFF”, then a faulty remote microphone condition has occurred. A
faulty remote microphone condition may be caused by:
1. Improperly configured panel.
2. Faulty wiring between the panel and the remote microphone station.
3. Faulty REM MIC Fuse (F1) on the DCDC module.
4. Faulty Remote Microphone Station.