Sony RDR-GX210 Service Manual page 63

QQ
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No 33VT
Is the R139 Normal?
YES
Is there about 33V at the
Q123 pin1?
YES
Is the ZD152 is normal?
YES
Check or Replace the D128
TE
L 13942296513
No 5.0VT
Is the Vcc(5.3V) supplied
to Q124 Emittor?
YES
Is the Q122 Base 'H'?
YES
Check or Replace the Q124
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NO
Replace the R139
NO
Check or Replace
the Q123
NO
Replace the ZD152
NO
Check or Replace the D134
YES
NO
Check the TIMER "H"
signal from µ-com
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