CLEAR KB-702GM User Manual
K B - 7 0 2 / K B - 7 0 2 G M T W O - C H A N N E L S P E A K E R S T A T I O N S
3 - 3
TROUBLESHOOTING
SYMPTOM
CAUSE
SOLUTION
System does not operate. Talk
button does not light.
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.
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.
Speaker does not operate. Talk
button lights amber when
pressed.
button lights amber when
pressed.
Speaker switch turned off, volume
knob turned all the way down, or
channel switch set to unused channel.
knob turned all the way down, or
channel switch set to unused channel.
Adjust controls appropriately.
Speaker plug or wiring has come loose.
Make sure speaker is connected
internally.
internally.
Plug P3 missing on circuit board.
Plug P3 must be installed in jack J3 if
the EB-TW or EB7-4W options are
not used.
the EB-TW or EB7-4W options are
not used.
Hum or buzz in system
Inductive pickup caused by close
proximity of this speaker station or
connected stations to power lines or
transformers.
proximity of this speaker station or
connected stations to power lines or
transformers.
Relocate the offending unit or wiring.
If the cable run is exceptionally long,
consider adding and using the
EB7-4W four-wire option module.
(Requires an additional four-wire
interface at the opposite end of the
“long run.”)
If the cable run is exceptionally long,
consider adding and using the
EB7-4W four-wire option module.
(Requires an additional four-wire
interface at the opposite end of the
“long run.”)
System feedback (Acoustical)
Intercom level control at this station or
another station is set too high.
another station is set too high.
Adjust.
Sidetone null control at this station or
another station is not adjusted
correctly.
another station is not adjusted
correctly.
Adjust. Refer to the chapter
“Operation.”
“Operation.”
Channel not terminated.
Set the main station or power supply
termination switch for that channel to
the on position.
termination switch for that channel to
the on position.
Channel switch set to an unconnected
channel.
channel.
If only one intercom line is connected,
set option switch #1 to the on or closed
position to link both channel switch
positions to the same intercom line.
set option switch #1 to the on or closed
position to link both channel switch
positions to the same intercom line.
A headset extension cord was used.
Headset extension cords are not
recommended.
recommended.
VOX problems (KB-702GM
only)
only)
Stays tripped (amber light on).
Sensitivity set too high.
Sensitivity set too high.
Turn VOX sensitivity control in a
counter-clockwise direction.
counter-clockwise direction.