K B - 7 0 1 S P E A K E R S T A T I O N
3 - 2
TROUBLESHOOTING TIPS
SYMPTOM
CAUSE
SOLUTION
System does not operate. The
talk
button does not light.
(1) No intercom connection to the
KB-701. If the EB7-4W four-wire
option module is connected, no AC
power is reaching the KB-701.
(1) Check connections and cable.
(2) The KB-701 has an internal
failure.
(2) Unit requires servicing.
System operates incorrectly. The
talk
button does not turn amber
when the
talk
button is pressed,
or stays amber until
talk
button
is pressed and the speaker is
off
when it should be on.
(1)
Operating mode
switches are set
incorrectly.
(1) Refer to the
option
switch setting
section of this manual.
Speaker does not operate. The
talk
light turns amber when
talk
button is pressed.
(2)
Intercom
level
knob turned all the
way down.
(2) Adjust control appropriately.
(3) Speaker plug or wiring has come
loose.
(3) Make sure speaker is connected
internally.
(4) Plug
P3
missing on circuit board.
(4) Plug
P3
must be installed in jack
J3
if the EB7-4W or EB7-TW option
is not used.
Hum or buzz in system.
(1) Inductive pickup caused by close
proximity of this speaker station or
connected stations to power lines or
transformers.
(1) 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 a “long run.”)
System feedback (Acoustical).
(1)
Intercom
level
control at this
station or another station is set too
high.
(2) Adjust.
(2) Channel unterminated.
(2) Set the
main station
or
power supply
termination
switch for the appropriate
channel to the
on
position.
(3) The KB-701’s microphone is too
close to an open speaker on the same
channel.
(3) Change the unit’s location.
