Yamaha T3n Service Manual page 58

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T5n/T4n/T3n
9 Check "2. Electrical Performance".
58
D
Waveform check OK ?
YES
Turn the power switch off.
Install F101 and F102.
Turn the power switch on.
"2. Electrical Performance"
OK ?
END
Test point
NO
D136 cathode – E DC voltage =
approx. +16 V ?
C
Replace IC104.
C
If IC103 has been replaced, replace IC101.
NO
Replace PST circuit board.
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NO
YES