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HX751EPage 34
SYMPTOM
The
[
SCAN
(
DW
)]
key
does not start the scan.
Some channels not
available when expected
or vice versa.
Cannot change any
function.
Key Lock does not
function.
Indicator does not light
when charging a battery.
PROBABLE CAUSE
No preset channels or any
Channels are not stored into
Scan memory.
Squelch is not adjusted.
Incorrect Channel Plan
selected.
Low battery.
Audio volume level is too low.
Key Lock is on.
Proper operation not
followed.
Defective battery FNB-V99LI.
REMEDY
Refer to section 6.9 MEMORY
SCAN to program channels into
scan memory.
Adjust the squelch to threshold or
to the point where noise just dis-
appears. Further adjustment of the
squelch control may eliminate in-
coming signals.
HOLD down the
[
16/9
]
key and
press the
[
CLR
]
key to select the
correct Channel Plan.
Charge battery. Refer to section 4
of this manual.
Press the
[
VOL
]
key and press the
[
]
key several times.
Turn Key Lock off. Refer to section
5,
[
H/L
( )]
key.
Hold down the
[
H/L
( )]
key for 2
seconds.
Contact your Standard Horizon
dealer.
10.2 TROUBLESHOOTING CHART
Press and holding the
[
SQL
]
switch does not
eliminate background
noise.
10. MAINTENANCE
10.1 GENERAL
The inherent quality of the solid-state components in STANDARD HORIZON
radios will provide many years of continuous use. Take the following precau-
tions to prevent damage to the radio.
To prevent corrosion of electrical contacts and keep the water resistance,
keep the microphone connected or the jack covered at all times.
Never key the transmitter unless an antenna or suitable dummy load is
connected to the antenna receptacle.
Ensure that the input voltage does not exceed the value specified in your
Owner’s Manual.
Use only STANDARD HORIZON-approved accessories and replacement
parts.
34


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