A D V A N C E D T R O U B L E S H O O T I N G
33.
G) THERE IS A LOUD SQUEAL IN THE INTERCOM SYSTEM WHEN THE
INTERCOM VOLUME IS TURNED UP
1.
Check for an open mic too near the speakers of a headset. Feedback problems are
often fixed by turning the intercom volume down, moving the mic away from the
headset speakers, or unplugging a headset when not in use.
2.
If the problem persists, unplug the headset locations one at a time from the rear of
the Intercom Unit until the squeal stops.
3.
Check the headset location for faulty connections or components.
See “Troubleshooting a Headset Location” (page 30).
H) THE RADIO RECEIVE AUDIO IS WEAK
1.
Check the setting of the radio’s volume control. The radio’s volume should be set
at the normal volume for use with
NO
intercom system present.
2.
Adjust the Receive Audio adjustment. See “Intercom Adjustments” (page 16).
3.
Verify proper connection to pins 6 & 7 on the Radio Interface Cable.
4.
Try swapping the Intercom Unit with a known good one (if one is available). If
the problem persists, the problem is in the radio or the Mobile Radio Interface
wiring.
5.
If no fault can be found, then the fault must lie in the Intercom Unit. Contact
Firecom for a Return Materials Authorization (RMA) Number to return the
Intercom Unit for repair.
.
I)
THE RADIO KEYS BUT HAS NO TRANSMIT AUDIO (CARRIER BUT
NO AUDIO)
1.
Check the affected headset location for faulty connections or components.
See “Troubleshooting a Headset Location” (page 31).
2.
Check the Transmit Audio adjustment See “Intercom Adjustments” (page 17).
3.
Verify connection of pins 1 & 2 on the Radio Interface Cable and the Radio
Interface Port.
4.
Try swapping the Intercom Unit with a known good one (if one is available). If
the problem persists, the problem is in the Mobile Radio Interface wiring.
5.
If no fault can be found, then the fault must lie in the Intercom Unit. Contact
Firecom for a Return Materials Authorization (RMA) Number to return the
Intercom Unit for repair.
.
