Instruction manual

7-5
Procedure E
If the green AC LED is “ON”, yellow TROUBLE LED is “ON”, and D22, DV LED is “ON”, the
Digital Voice messages are missing or the DV output voltage is too low. A DV low output voltage
condition might be caused by:
1. Missing memory chip.
2. No messages recorded on memory chip.
3. Digital Voice volume control (R193) set too low.
4. A faulty Motherboard.
Perform the following:
1. Check for missing memory chip.
2. Verify messages are recorded on chip by activating them using switch SW3.
3. Check Digital Voice volume control (R193) for proper volume level.
4. Replace the Motherboard.
Procedure F
If the green AC LED is “ON”, yellow TROUBLE LED is “ON”, and D35, MIC LED is “ON”, the
push-to-talk microphone is missing, improperly plugged in, or defective. A MIC trouble condition
might be caused by:
1. Missing push-to-talk Microphone
2. Microphone Improperly installed.
3. Defective Microphone.
4. A faulty Motherboard, replace.
Perform the following:
1. Install Microphone.
2. Remove microphone plug and plug it back in.
3. Replace Microphone.
4. Replace motherboard.
Procedure G
If the green AC LED is “ON”, yellow TROUBLE LED is “ON”, D36, AMP LED is “ON”, input to
amplifier section is missing or too low, or amplifier section on motherboard is defective. An
amplifier trouble condition may be caused by:
1. No message or Volume is too low on the DV Memory Chip.
2. 900 HZ tone missing
Perform the following:
Replace the Motherboard.
Procedure H
If the green AC LED is “ON”, yellow TROUBLE LED is “ON”, and D37, STB SHORT LED is “ON”,
a short condition exists on the STB OUT NAC output circuit. A STB SHORT trouble condition
might be caused by:
1. Shorted appliance on STB OUT.
2. Faulty wiring between STB OUT and strobe notification appliance circuit causing a short..
Perform the following:
Check wiring and strobe notification appliances for a short circuit condition.