HX270EPage 22
TROUBLESHOOTING CHART
6. MAINTENANCE
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.
Keep the microphone connected or the jack covered at all times to pre-
vent corrosion of electrical contacts;
Never key the transmitter unless an antenna or suitable dummy load is
connected to the antenna receptacle.
Use only STANDARD HORIZON-approved accessories and replacement
parts.
SYMPTOM
The SCAN key
does not start the
scan.
The USA/INTL/
CAN modes do not
function.
Press and holding
the SQL key does
not eliminate back-
ground noise.
Cannot change
any function.
Key Lock does not
function.
Indicator does not
light when charg-
ing a battery.
PROBABLE
CAUSE
No channels
memorized.
Squelch is not ad-
justed.
Proper operation
not followed.
Low battery.
Key Lock is on.
Proper operation
not followed.
Defective battery
FNB-83 or cor-
roded contacts on
battery or charger.
REMEDY
Use the MEM key to enter
desired channels into the
transceiver’s memory.
Adjust the squelch to thresh-
old or to the point where noise
just disappears. Further ad-
justment of the squelch con-
trol may eliminate incoming
signals.
HOLD down the 16/9 key and
press the DW key.
Charge battery. Refer to sec-
tion 3 of this manual.
Turn Key Lock off. Refer to
section 4.1. .
Hold down the H/L key for 1
second.
Contact your Standard
Horizon dealer.