40
2.2 No sound is output from Phones. (The headphones are connected to PHONES jack.)
NG
OK
NG
OK
NG
OK
OK
NG
OK
NG
OK
NG
NG
Are the connector (J950, J951) voltage
line normal? 8pin and 10pin,+8VA,–8VA
Is the 1pin of connector (J950, J951)
voltage line normal?
HP connection: L / HP un-connecting: H
(3.3V)
Is the 6pin of Q950 MCLK signal normal?
Is the waveform of Q950 (3 to 5pin)
normal?
Is the waveform of Q950 (14,15,19pin)
normal?
Is the 2pin of connector (J950, J951)
voltage line normal?
PLAY: L (–8V), STOP: H (3V)
Are the MUTE signals normal?
Check the +8VA and –8VA voltage line of
PM01 PCB, PA01 PCB and P801 PCB.
Replace J952.
Check the MCLK signal of PM01 PCB.
Check the Audio data output line of
PM01 PCB.
Replace Q950
Check the HP-MUTE output signal of
PA01 PCB.
Replace defect component.
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