8170 N/B MAINTENANCE

8.14 Audio Failure

No sound from speaker after audio driver is installed.

Audio Drive Failure

1.Check if speaker cables are connected properly.

2.Make sure all the drivers are installed properly.

Replace

Board-level

Troubleshooting

Check the following parts for cold solder or one of the following parts on the motherboard may be defective,use an oscilloscope to check the following signal or replace parts one at a time and test after each replacement.

Test

Yes

 

Correct it.

OK?

 

 

 

No

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

1.Try another known good speaker, CD-ROM.

2.Exchange another known good charger board.

Re-test

Yes

 

Correct it.

OK?

 

 

 

 

 

 

No

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Motherboard

1.If no sound cause of line out, check the following parts & signals:

Parts:

Signals:

U15 X2

AOUT_R

U510 U507

AOUT_L

U17

U511

SPKROUT+

VR1

U18

SPKROUT-

C[707:710]

SPKLOUT+

R[664:667]

C[691:694]

SPKLOUT-

L47 Q514

LINE_OUT_5

Q515 Q10

LINE_OUT_2

L[537:539]

SPK_OFF

L523 L524

SPDIFOUT

L528 L531

 

J[18:20]

 

2.If no sound cause of MIC, check the following parts & signals:

Parts:

Signals:

J16 J22 U15

MIC

L535 L525

MIC_2

C701

R148

MIC_3

R149

R669

 

U513 C194

 

R151

C209

 

R670

C686

 

3.If no sound cause of CD-ROM, check the following parts & signals:

Parts: Signals:

J10 CDROM_RIGHT

R[132:134] CDROM_LEFT

R[140:142] CDROM_COMM C[191:193]

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