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7. Power Circuit(SMPS)
(2) No 12VA.(Capstan)
No 12VA.
Does 5.3VA work normally?
Is the D109 normal?
Check 12VA Line of the Main PCB short.
(3) No 12VA (Hi-Fi, Buffer)
No 12VA.
Is Vcc(about 14VA) put into the Q155
Collector?
Is Voltage(about 14V) put into the Q155
Base?
Check or Replace the Q155.
YES
YES
YES
YES
YES
YES
NO
Check whether 5.3VA is out of order.
NO
Replace the D109.
NO
Replace the Peripheral Circuitry of Q155.
NO
1. Check the ZD151 and the Peripheral
Circuitry.
2. Check the R105.
3-4
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