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VOLTAGE CHECK
ALL Fuse CHECK
YES
C904(+),C905(-)DC VOLT OUTPUT CHECK
YES
IC901,IC902 INPUT DC VOLT CHECK
YES
IC903 Output DC VOLT CHECK (6.2V)
YES
IC903 Output DC VOLT CHECK (6.2V)
YES
MUTE
Muting CIRCUIT Troubleshooting (MUTE CONDITION)
Q201,Q251,Q600,Q650 Base "High"
YES
Q201,Q251,Q600,Q650 Collector "Low"
YES
MUTE
NO
FUSE CHANGE
NO
CN900 (-)1,2 PIN,(+)5,6 PIN OUTPUT VOLTAGE,D900 CHECK
D700 CHANGE
NO
CN901 7 Pin DC VOLTOUTPUT CHECK
D901,D902,D903,D904 COMPONENT CHECK AND CHANGE
NO
D909,D910 VOLT CHECK
D908 +12V CHECK AND CHANGE
NO
IC904 1PIN (+)High CHECK
IC904 CHANGE
NO
IC201Troubleshooting CHECK (ONLY Q201/Q251)
NO
Q504 EMITTER "HIGH"(ONLY Q714/Q715)
Q504 CHANGE
NO
TR CHANGE
- 2-15 -
NO
YES
TransformerCHANGE
NO
YES
Transformer CHANGE
NO
YES
IC901 CHANGE
NO
YES
SECTION CHECK
NO
YES
Q500 CHECK AND CHANGE
YES
NO
IC301 Troubleshooting CHECK
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