Instruction manual

Procedure D

If the green AC LED is “ON”, yellow TROUBLE LED is “ON”, and D28, AUX TRB LED is “ON”,

the EOLR is missing from the AUX RET terminals when jumper W1 is removed. . An Auxiliary

Trouble condition might be caused by:

1. Jumper W1 removed and no EOLR on the AUX RET terminals.

2. A faulty Motherboard. Replace.

Perform the following:

1. If the internal 10K Ohm resistor is desired, replace the jumper W1.

2. If a value other than 10K Ohms is desired for a EOLR, install the EOLR on the AUX RET

terminals.

3. Replace motherboard.

Procedure E

If the green AC LED is “ON”, yellow TROUBLE LED is “ON”, D22 AMP TRB LED is “ON” .

Amplifier section is defective. An amplifier trouble condition may be caused by:

1. Failed components.

2. 900 HZ tone missing

Perform the following:

1. Replace the Audio Booster PC board.

Procedure F

If the green AC LED is “ON”, yellow TROUBLE LED is “ON”, and D77 EXP SHORT LED is “ON”,

the supervision circuit is unable to read the EOLR: This can be caused by:

1. Expansion circuit is shorted.

Perform the following:

1. Check wiring to EXP OUT terminals and insure there is no short.

Procedure G

If the green AC LED is “ON”, yellow TROUBLE LED is “ON”, and D76 EXP OPEN LED is “ON”,

the supervision circuit is unable to read the EOLR: This can be caused by:

1. Missing or Improper EOLR

2. Open or loose wiring on the EXP OUT terminals.

3. Open EXP OUT appliance circuits.

Perform the following:

1. Check that EOLR is in place and is UL Listed 10K Ohm

2. Check wiring to EXP OUT terminals and insure there is no open circuit.

3. Troubleshoot expansion circuit for incorrect wiring.

Procedure H

If the green AC LED is “ON”, yellow TROUBLE LED is “ON”, and D34, GF LED is “ON”, a ground

fault condition exists on the output wiring. A GF trouble condition might be caused by:

1. Appliance wiring touching conduit.

2. Improper Installation of an appliance(s).

Perform the following:

1. Disconnect appliances from the strobe and speaker connection on the motherboard.

Troubleshoot NAC circuits by checking for a resistance reading other than infinity between

the appliance leads and the conduit.