Unitron UTMD, Installation Manual

Page: 11 / 11

11
A DJUSTING P.A. VOLUME
MICROPHONE P.A. and
RADIO REBROADCAST
The Volume Control knob, located on the front panel,
adjusts the outgoing volume of both the P.A. and
Radio Rebroadcast signals
. Adjust for clear sound.
1. Sit inside car: Make test count while slowly
rotating control until desired sound output is
attained.
NO MICROPHONE P.A.
1. Plug a known good microphone fully into the
microphone jack in the front faceplate.
2. If using an LM Radio Microphone Adapter, verify that
correct model has been installed for radio being used. If
model is correct, interchange adapter with another
known to be operational.
3. If above procedures are followed without results, audio
input or drive circuitry is defective.
WARNING LIGHT SWITCHING
1. Control terminals: emit +12V. Use test light or a
voltmeter to check voltage at related terminals. Connect
one probe to ground.
2. If no voltage is present at tested terminals, check the
input voltage at the “WLT” wire.
3. If the input voltage is correct the warning light control
circuit is defective.
ACCESSORY SWITCHING
1. Accessory connections can be made only as shown on
Page 9.
2. TAKEDOWN, LEFT, RIGHT and AUX1 and AUX2
light terminals do not become functional until the
ACCESS primary wire is connected.
3. RELEASE terminal becomes functional only when the
ignition wire has been connected.
ASSISTANCE
Technical help is available by phone 7:00 AM to 3:30 PM
Pacific Standard Time, Monday through Friday,
except holidays.
(800) 854-3375 is toll free within the United States
and Canada. Phone (714) 871-3336 from other areas.
If it is necessary to return a unit, please observe
this procedure:
a) Call for RMA number.
b) Pack to prevent damage in transit.
c) Include brief description of problem and RMA No.
d) Include name and phone number of a person
who can be contacted in the event the bench test
does not reveal problem experienced with vehicle.
NO SIREN SOUNDS
If SIREN KILL feature has been connected, shift car out of
Park or Neutral before testing.
1. W. LTS 10 Ga. Wire not hook to 12Vdc.
2. Check siren speaker or its wiring for a short circuit.
3. Repairing the short in the circuit will automatically
restore siren operations. No damage to electronic
components can result from speaker or speaker wiring
problems.
4. Remove speaker wires. Turn siren on and listen
for siren sound from Touchmaster
Delta ™
cabinet. If sound can be heard, speaker or speaker
wiring is “open” (not connected).
NO HORN RING SIREN CONTROL
1. (-) or (+) polarity may be connected to the RNG
terminal. Compensation is automatic.
2. Verify that cut ends of horn ring wire have been
correctly connected to HRN (HORN) and RNG
(RING) terminals. Reversed connections may
result in a malfunction.
3. A relay is used in all models to transfer horn ring
circuitry (Relay #K2 at top left of top circuit board).
Remove cabinet cover and verify contact integrity.
SECTION VII
SERVICE AND MAINTENANCE
ADJUSTMENTS & TROUBLE-SHOOTING