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I
TROUBLESHOOTING
Sympto m
Cause/Remedy
1)
Display dose not
light and
no sound
1)
Defect
iv e batteries: Change batteries.
when POWER is
on.
2)
Wrong
polarity
of
batteries: Correct the polarity
of
batteries.
Volume contral: MAX.
3)
Defective
external power jack or charge jack:Replace.
Squelch
control:
counterclockwise
4)
Defective
ON
-OFF
sw
itch on volume
control:
Replace.
(CCW
)
1)
Defect iv e speaker
or
EXT. SPKR jack:
Replace
the detect ive
parts.
2) Detective audio
amplifier ICg
and/or
associated
circuit
components: Replace
2)
Display light s but no sound.
the def ectiv e
components.
3)
De/ective
IF
amplif
ier
IC10 1
and/
or
associated
circuit
components:
Repl
ace
Volume contro
l:
MAX.
the def ective
components.
Squelch
control: CCW
4
) Def ectiv e functional squelch
contral
and/or
associ ated
circuit
components:
Replace
the
cetective
components.
5)
Defective
a1 g, IC1
and/or
associat ed circuit:
Replace
t
he
defect ive parts.
3
)
Sound co
mes out
but display
dose not
light.
1)
Defective LCD or rubber
connector: Replace t
he def ecti ve
part s.
Volume con
trot
MAX.
2
) Defective
IC
1 and/or associated circuit:
Replace
the
detective
parts.
s
oueicn
control
: CCW.
•
1) Defect iv e IC10 1
and/
or
associ ated
circuit
cornponents:
Repl
ace
th
e
4)
Does not scan and squelch does not
defective
components.
operate.
2)
Defect ive IC1
and/
or
associated
circuit
components:
Replace
th
e defective
compo
nents.
1) Defective
IC1
and/or associated circuit components: Replace
t
he defect ive
5
) Does
not
scan
but squelch operates.
compo
nents.
•
6)
Displays incorrectly
and/
or unable to
1)
Defective
Keyboard
and/or
associ at ed circuit:
Replace
the
detective parts.
enter
correct ly when
RESET switch
is
2)
Defect ive
CPU
(lC
1)
and/
or
associ at ed circuit:
Replace
t
he
defecti ve parts
.
pushed.
7)
Displays
correctl
y
at the time of pro-
gramming. But after scanning, it
be-
1)
Defect
ive
CPU (lC
1)
and/or
associated circuit:
Replace the
detective
parts.
comes
t
aulty,
8)
MANUAL
select
operates
but SCAN
1) Squelc h
contral
is
not adlusted
right: Turn
soueten
contral
clockwise.
does
not
operate.
1 ) Faulty
connection between linear
and
logie PCBs: Replace
the defective
parts.
All bands do
not operate
but display is
2) Defective
a
15-18
in
low-pass
f
ilter:
Replace the
defective parts.
g)
3)
Defective IC7, 8
and/
or associated
circuit:
Replace the
defect ive
parts.
OK.
4)
Defect ive
ei.
2,
5 voltage regulator and/or
oz.
8,
06, 7, 30,
31 DC- DC
converter circuit
and/
or
a3,
6
power saving
c
ircu it:
Replace
the defect ive
parts.
- 18
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