TROUBLE SHOOTING
5ymptom
Cause/Remedy
Display
does
not light and no 1) Detective AC Line Cord or ext. power jack: Replace.
sound when POWER is on. 2) Detective power transtormer T201: Replace.
Volume control: MAX. 3) Detective Rectifier
06
: Replace.
Squelch control: counterclockwise 4) Detective voltage regulator: Replace.
(CCW)
5)
Detective On/oft switch on volume control: Replace.
Display lights but no sound. 1) Detective speaker or headphone jack: Replace the detective parts.
Volume control: MAX 2) Detective audio
amp
litier IC3 and
/or
associated circuit components:
Squelch control: CCW Replace the detective components.
3) Detective IF amplitier
ICl
and lor associated circuit components:
Replace the detective components.
4) Detective tunctional squelch control and
/or
associated circu it
components: Replace the detective components.
5) Defective
020
, 21, IC7 and
/or
associated circuit: Replace the
defective parts.
Sound
comes
out
but display 1) Detective LCD: Replace the defective parts.
does
not light.
2) Defective IC7 and
/or
associated circuit: Replace the defective parts.
Volume control: MAX
Squelch control: CCW
Does not scan and squelch does 1)
Defective
ICl
and/or associated circuit components: Replace the
not operate.
detective components.
2)
Detective IC7 and/or associated circuit components: Replace the
detective components.
Does not
scan
but squelch
1)
Detective IC7 and/or associated circuit components: Replace the
operates. detective components.
Displays incorrectly and
/or
unable 1) Defective Keyboard and
/or
associated circuit components: Replace
to enter correctly when RESET the defective components.
switch is pushed. 2) Defective CPU (IC7)
and
/or
associated circuit components:
Replace the detective components.
Displays correctly at the time of 1) Detective CPU (IC7)
and
/or
associated circuit components:
;
programming. But after scanning, Replace the detective components.
it becomes taulty.
MANUAL
select operates but 1) Squelch control is not adjusted
right: Turn
squelch
SCAN does not operate. controlclockwise.
All
bands
do
not
operate
but
1)
Detective
036-38
in lowpass tilter: Replace the detective parts.
display is OK.
2) Detective IC8 and/or associated circuit: Replace the detective parts.
3) Detective
034
, 35, 054, 55, 56 DG-DC converter circuit: Replace
the defective parts.
VHF
Lo (Mid) band
does
not 1)
Detective
01-4
,
Tl
, 2 Tuning circuit and/or
06
, 7, 8 VCO circuit:
operate but Air, VHF Hi, UHF Lo Replace the detective parts.
and UHF Hi band operate. 2) Detective
032
and/or associated circuit: Replace the defective
parts.
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