Clear-Com KB-702 - 4.3 Troubleshooting

User Guide| KB-702/KB-702GM/KB-802-GM-IM
EQ/
LIM
Mic Select
Headset
Mic
Panel
Mic
Ta l k
Sidetone
Null
Call
Light
Call
Intercom
Volume
Red /
Green
Speaker
On/Off
TW Option
Channel
Switch
Ch. A
Speaker
Power
Ch. B
Call Send &
Receive
RMK
Microprocessor
Ta l k/
VOX
Headset
Output
Balanced
Program
Input
Speaker
Dip
Program
Mute
Mic Dip /
Mute
VOX
Common
+30 VDC
Ground
Latch
Disable
Long Line
Program
Level
Call Alert
To n e Level
4-Wire
Input
4-Wire
Output
2-Wire / 4-Wire
Select
Rectifier
16 VAC
Power
Ch. B
Ch. B
Ch. A
Ch. A
4-Wire
Option
Single
Chan.
4.3 Troubleshooting
Symptom Cause Solution
System does not
operate. Talk button
does not light.
No intercom connection to
the KB-702. If the EB7-4W
four-wire option module is
connected, the KB-702
may not be receiving AC
power.
Check connections and
cable.
The KB-702 has an internal
failure.
Unit requires servicing.
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