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7. POWER AMP PART CHECK
POWER AMP PART CHECK
Check
CN105 Pin2: +12 V
Pin13,15: 29 V.
Check IC700, IC701
Pin30,31,38,39,42,43,50,51 input voltage.
Check each IC603
Pin64:+12 V input.
Check PWM Modulator input
IC700 Pin4,5,10,11 / IC701 Pin4, 5.
Check IC701, IC702
Pin28,29,36,37,43,44,52,53.
Check output
line coil.
OK
YES
YES
YES
YES
YES
YES
YES
NO
Refer to SMPS troubleshooting.
NO
Check each line resistor output voltage.
NO
3-9
Replace the coil.
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