Toshiba SD-270EKB2, Руководство по обслуживанию

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1 -3
All output voltages on the power board is 0V or deviated.
No
No
No
Yes
No
U1(PIN 8 - Drain waveform)
Replace F1
Replace C1&C2 if D1, D2, D3, D4
are normal.
Check/ replace U1.
Check whether U1 are eroded.
All output voltages on
the power board is 0V or
deviated
Check whether
there is 300V on C1
Check whether 100KHz
oscillating signal on
Pin6 of U1
Check if +5V, , +12V and
-12V are short.
Check whether the components in the
short-circuit voltage are defected or eroded.
Yes
Yes
Yes
Yes
U1(PIN 3 - RC waveform)
Check whether F1 is
blown
Trouble shooting chart