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

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.

Speaker does not operate. Talk 
button lights amber when 
pressed.

Speaker switch turned off, volume 
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.

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.

Hum or buzz in system

Inductive pickup caused by close 
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.”)

System feedback (Acoustical)

Intercom level control at this station or 
another station is set too high.

Adjust.

Sidetone null control at this station or 
another station is not adjusted 
correctly.

Adjust. Refer to the chapter 
“Operation.”

Channel not terminated.

Set the main station or power supply 
termination switch for that channel to 
the on position.

Channel switch set to an unconnected 
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.

A headset extension cord was used.

Headset extension cords are not 
recommended.

VOX problems (KB-702GM 
only)

Stays tripped (amber light on). 
Sensitivity set too high.

Turn VOX sensitivity control in a 
counter-clockwise direction.