175
8175 N/B MAINTENANCE
8175 N/B MAINTENANCE
Test
OK?
Audio Drive Failure
1. Check if speaker cables are connected
properly.
2. Make sure all the drivers are installed
properly.
1.Try another known good speaker,
CD-ROM.
2. Exchange another known good
charger board.
Re-test
OK?
Replace
Motherboard
Yes
Correct it.
Correct it.
Yes
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.
Signals:
AOUT_R
AOUT_L
SPKROUT-
SPKLOUT-
LINE_OUT_5
LINE_OUT_2
SPK_OFF
SPDIFOUT
1.If no sound cause
of line out, check
the following
parts & signals:
2. If no sound cause
of MIC, check
the following
parts & signals:
3. If no sound cause
of CD-ROM, check
the following
parts & signals:
Parts:
Signals:
MIC
MIC_2
MIC_3
Parts:
Signals:
CDROM_RIGHT
CDROM_LEFT
CDROM_COMM
Parts:
No
No
J10
R[132:134]
R[140:142]
C[191:193]
J16 U15
L535 C701
R148 R149
R669 U513
C194 R151
C209 R670
C686
U15 X2
U510 U507
U17 U511
U18
C[707:710]
R[664:667]
C[691:694]
L47 Q514
Q515 Q10
Board-level
Troubleshooting
8.14 Audio Failure
No sound from speaker after audio driver is installed.
Audio BD:
J7 J1 L10
Audio BD:
L[2:5] L14 L16
L24 L19 J3
J501 J502 VR1
