Symptom
Cause/Remedy
Alrcraft band does not operate but 1) Defective 012, T3,
5 and/or assoclated circuit: Replace the
VHF Lo, VHF Hl, UHF Lo and UHF
defective
parts,
Hl band operate. 2) Defectlve AM IF Amp Including 022, 23: Replace the defectlve
parts.
3) Defective 031 In band switch circuit: Replacethe defectlve parts.
VHF Hl band does not operate but 1) Defectlve 06, 10, T4, 6 and/or assoclated circuit: Replace the
Air, VHF
Lo,
UHF Lo and UHF Hl
defective parts.
band operate. 2)
Defective
029
In band switch circuit: Replace the defectlve parts.
UHF Lo band does not operate 1)
DefectlVe
04,
5 and/or associated circuit: Replace the defectlve
but Air, VHF
Lo,
VHF Hl and UHF parts.
Hl band operate. 2)
Defectlve
028
In band switch circuit: Replace the defectlve parts.
UHF Hl band does not operate but 1) Defectlve 012-14, 16 and/or assoclated circuit: Replace the
Air, VHF Lo, VHF Hl and UHF Lo defectlve parts.
band operate. 2) Defectlve 015, 17VCO circuit: Replace the defectlve parts.
3)
Defectlve
027
and/or assoclated circuit: Replace the defectlve
parts.
Does not make beep tone. 1)
Defectlve
1C3
and/or assoclated circuit: Replace the defectlve parts.
2)
Defectlve IC7 and/or assoclated circuit: Replace the defectlve parts.
LOW BATT does not Indlcate 1)
Defectlve IC2 and/or assoclated circuit: Replace the defectlve parts.
when battery voltage went down.
"Zeromatic" does not operate or 1)
Defectlve
1C2,
024
and 033, 34 In Zeromatlc circuit: Replace the
holds on a drifted frequency at
defectlve parts.
search operation. 2)
DIscriminator
coU
Is out of adjustment: TP5 shall have 1/2Vcc
(approx. 2.7
V)
In
normaJ
recelvlng mode.
3)
Referto "Reference Frequency OSC Allgnment" on page 1
O.
Important Note:
Pulse, generated while checklng circuits and / or certaln combinations of key operation may cause Improper opera-
tion. To clear the malfunctlon, re-Initlallzatlon of CPU Is necessary: Push
RESET
switch while pressing CLEAR, and
then release the RESETswitch. All channels (200 ch) wlll be cleared and frequency Indicator displays 000.0000. (Be
sure the power is on when dolng the above.)
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