TOSHIBA SD-270EKB2
Manual de Servicio

1-7

Trouble shooting chart

Distorted audio and loud noise
Distorted audio and loud noise Yes Check the power supply voltages +12V to the operation amplifying Q27 and -12V are normal. Yes

No Check Q27

Check whether the muting transistor R176 andR175 are normal Yes

No Replace R176 and R175

Check whether the muting transistor Q17,Q18, are normal Yes

No Replace Q17~Q18

Checking the U15 leads the feet has no to break to open Yes

No

Correct connection

Replace U1 No if the clock signal AOUT0, ABCK and ALRCK output by U1 are normal

SACLK waveform

SBCLK waveform

SSLRCK waveform

Yes

Check whether the U1 or U15 powersupply normal Yes
Replace U1 or U15

No Check U15