Symptom
Possible CauselRemedy
Sound does not come
out in AM mode but
• Detective IC1:
NFM and WFM operate
Replace.
• Detective
switching circuit (IC303, IC305)
and/or
associated circuit:
Replace the detective components.
Sound does not come out in AM and NFM
• Detective IC301 and/or associated circuit:
modes but WFM operates
Replace the detective components.
Sound does not come out in WFM mode but
• Detective IC1:
AM and NFM operates Replace IC
1.
• Detective switching circuit (IC303, IC305,
0303, 0304,
0306)
and/or associated circuit:
Replace the detective components.
Sound does not come out in WFM and AM
• Detective IC102 and/or associate circuit:
modes but NFM operates
Replace the detective components.
• Detective
switching circuit (IC303, IC305) and/or
associated circuit: Replace the detective components.
Low sensitivily
between 30.000 and 87.495
•
Defective decoder switching circuit (0101):
MHz
Replace
0101.
• Detective bandpass filter (BPF):
Replace the detective components.
Low sensitivily between 87.5 and 174 MHz
• Detective switching circuit (0102):
Replace
0102.
• Defective BPF:
Replace the detective components.
Low sensitivity between 174.005 and 350 MHz
• Defective switching circuit (0102):
Replace
0102.
• Detective BPF:
Replace the detective components.
Low sensitivity between 350 and 512 MHz • Detective switching circuit (0103):
Replace
0103.
• Defective BPF:
Replace the detective components.
Low sensitivily between 760 and 999.9875
•
Defective switching circuit (0103):
MHz Replace
0103.
• Detective BPF:
Repiace the detective components.
Does not operate between 30 and 512 MHz • Detective
0110
and/or VC01 circuit:
Replace the detective components.
Does not operate between 760 and 999.9875 • Detective
0113
and/or
VC02
circuit:
MHz
Replace the detective components.
All bands do not operate but display is OK. • Detective PLL
(IC1
01, IC102, IC1) andlor associated circuit:
Replace the detective components.
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