1. Zone page or All-Call
page cannot be
accessed
1. Telephone system must have touchtone (DTMF)
dialing.
2. Check presence and polarity of -24VDC and
GND for both "A" and "B" battery.
3. Check sidetone in handset. If there is no side
tone, recheck "A" and "B" battery, at least
-20VDC required.
2. No background music.
1. Verify unit has released from last page.
2. Check program source, and adjust its volume
control, as desired.
3. Check presence of music audio input at "T" in
and "R" in and if necessary also at the music
source.
4. Check presence of music audio input at "T" out
and "R" out and if necessary also at speaker
amps. or paging amp. input.
3. No sound or low page
volume.
1. Check presence and level of audio input at Tip
Ring and if necessary also at the CO Port.
2. Check presence and level of audio at "T" out
and "R" out and if necessary also at speaker
amps. input.
4. The alert tone is
too high or too low.
1. Set the alert Tone Volume to the desired
level.
5. Talkback does not
function properly.
1. If ZC-3 and TBM-101 or TBH-104 use separate
power supplies, then check to insure there is a
common GND connection between ZC-3 and
TBM-101 or TBH-104.
2. TBM-101 or TBH-104 inhibit (INH) terminal
must be connected to the ZC-3's proper zone
inhibit (INH) terminal.
3. Refer TBM-101 or TBH-104 installation
instructions.
P81414 K
Sheet 5 of 6
Limited Warranty
Wheelock products must be used within their published specifications and must be PROPERLY specified, applied, installed, operated, maintained and
operationally tested in accordance with these instructions at the time of installation and at least twice a year or more often and in accordance with local,
state and federal codes, regulations and laws. Specification, application, installation, operation, maintenance and testing must be performed by qualified
