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8399
8399
N/B Maintenance
N/B Maintenance
120
Test
OK?
Audio Failure
1. Check if speaker cables are connected
properly.
2. Make sure all the drivers are installed
properly.
Try another known good speaker,
CD-ROM.
Re-test
OK?
Board-level
Troubleshooting
Replace
Motherboard
Yes
Correct it.
Yes
No
No
Parts:
U10
U14
U26
U13
J13
J21
L45
L47
L48
L43
R200
R191
R194
R213
L62
R172
R173
Signals:
+AVDDAD
VREF_OUT
MIC1
MIC2
CDROM_LEFT
CDROM_RIGHT
CDROM_ROMM
AUDIO_14M
AC97_SYNC
AC97_SDIN
AC97_SDOUT
AC97_RST#
AC97_BITCLK
SB_SPKR
CARDSPK#
AOUT_L
Replace the
faulty parts.
Check following parts and signals:
C148
R403
U11
L52
R205
Q13
C235
J12
L39
L41
L50
L51
L53
.
.
.
L56
AOUT_R
AC_GPI3
TP534
+5V_AMP
SHUTDOWN
SPKR_ROUT+
SPKR_ROUT-
SPKR_LOUT+
SPKR_LOUT-
HP_SENSE
There is trouble with the sound from speaker or completely no sound.
8.11 Audio Failure(1)
MiTac Secret
Confidential Document