Trouble Shooting - Toshiba 34HFX84 Service Manual

TROUBLE SHOOTING

NO SOUND(All source)
Check the output of Q670.
Check the existence of the waveform
of C682, C681, and C683.
NG
Check the voltage of Q670.
Pin8 13.25V/Pin9 26.50V
Pin11 13.25V/Pin12 13.25V
OK
Check the existence
of the input waveform
of Q670.
NG
Check the voltage of
QS102 and Q601.
Pin8 22V
OK
Check the existence
of the input waveform of
QS102 and Q601.
NG
Check the voltage of H002.
Pin27 9V
Pin11 5V
OK
Check the existence
of the input waveform
of H002.
NG
Check the power
supply voltage of QS01.
Pin32 9V
OK
Check the existence of
the input waveform of QS01.
Pin33
Pin34
NG
H002 exchange
OK
Check the connection with SPK.
NG
Check the Q670 recheck
OK
OK
Check the Q670
NG
QS102 and Q601 exchange
OK
QS102 and Q601 exchange
NG
To power supply block
OK
H002 exchange
NG
To power supply block
OK
QS01 exchange
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NG
To power supply block