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UDB275MP
8. TROUBLESHOOTING
Power does not turn on.
(
No sound is produced
)
Problem Cause Measure
Power antenna lead is
shorted to ground or
excessive current is re
-
quired for remote-on the
amplifiers or power an
-
tenna.
General
1. Turn the unit off.
2. Remove all wires attached to the power an-
tenna lead. Check each wire for a possible
short to ground using an ohm meter.
3. Turn the unit back on.
4. Reconnect each amplifier remote wire to the
power antenna lead one by one. If the ampli
-
fiers turn off before all wires are attached,
use an external relay to provide remote-on
voltage
(
excessive current required
)
.
No sound output when
operating the unit with
amplifiers or power an
-
tenna attached.
No sound heard. The speaker protection
circuit is operating.
Consult your store of purchase.
Replace with a fuse of the same amperage.
If the fuse blows again, consult your store of
purchase.
1. Turn down sound volume. Function can
also be restored by turning the power off
and on again.
(
Speaker volume is reduced
automatically when the speaker protection
circuit operates
)
.
2. If the sound is muted again, consult our
service department.
Fuse is blown.
Incorrect wiring.
Nothing happens when
button are pressed.
Display is not accurate.
The microprocessor has
malfunctioned due to
noise,etc
Turn off the power, then push the
[
PUSH OPEN
]
cover to flip down.
Press the reset button with a thin rod.