Instruction manual

7-11
Perform the following:
1. If the system does not have a remote microphone attached then switch the Remote
Microphone DIP switch (RM) “OFF”. (See Figure 3-18 for switch location)
2. Verify field wiring between the panel and the remote microphone station. (See Appendix B)
3. Replace Fuse F1 on the DCDC module. (See Figure 9-3 for fuse location)
4. Replace the Remote Microphone Station.
Procedure I
On the DCDC Module, the green NORMAL LED is “OFF”, the yellow TROUBLE LED is “ON”,
D12 “ON”, D11 “OFF”, D10 “ON”, an input power condition to the Dual-Circuit Power Supply
(DCPS) has occurred. This condition may be caused by:
1. Loss or low AC input power.
2. Fully discharged or low Battery Backup power.
3. Faulty DCPS Module.
Perform the following:
1. Remove Power Supply Cover. Observe AC LED “ON”. If “OFF”, check AC input. If “ON”,
disconnect AC and check Battery Backup. If Battery Backup low, replace batteries.
2. Replace the DCPS.
Procedure J
On the DCDC Module, the green NORMAL LED is “OFF”, the yellow TROUBLE LED is “ON”,
D12 “OFF”, D11 “ON”, D10 “ON”, panel microphone trouble has occurred. A panel microphone
trouble condition may be caused by:
1.The panel microphone is not properly plugged in.
2.Faulty wiring in the panel microphone circuit.
Perform the following:
1.Check to insure that the panel microphone is properly plugged in.
2.Unplug and re-plug panel microphone.
3. Replace panel microphone.
Procedure K
On the DCDC Module, the green NORMAL indicator is “OFF”, the yellow TROUBLE indicator is
“ON”, D12 “ON”, D11 “OFF”, D10 “OFF”, and the Digital Voice Module NORMAL LED, SYSTEM
TROUBLE LED, and TROUBLE LED are “OFF”, the Digital Voice Module (MDX-2) may be
completely inoperative due to power loss. This condition is caused by:
1. Input voltage is not within proper range or polarity is incorrect.
2. Blown fuse (F2) on the MDX-2.
3. Faulty MDX-2 Module.
4. One or more LED's are broken.
5. Faulty Motherboard (DCMB)
Perform the following:
1. Check voltage at TB1 on the Motherboard (DCMB) for 24VDC ± 5VDC and that correct
polarity.
2. Check Fuse F2 on MDX-2. If Fuse is good, replace MDX-2 Module.