Firecom 3000C Installation & Operation Manual page 31

A D V A N C E D T R O U B L E S H O O T I N G
F) YOU CAN'T HEAR OTHERS ON THE INTERCOM, BUT THEY CAN
HEAR YOU
1. Check the headset location for faulty connections or components. See
"Troubleshooting a Headset Location" (Page 25).
2. If the headset location checks good, the fault must lie in the Intercom Unit.
Contact Firecom for a Return Authorization to return the Intercom Unit for
repair.
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 25).
H) THE RADIO RECEIVE 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 14).
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 Authorization 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 25).
2. Check the Transmit Audio adjustment. See "Intercom Adjustments" (page 14).
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.
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