MiTAC MiNote 7321, Руководство по обслуживанию

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7321 N/B Maintenance 7321 N/B Maintenance
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 the parts one at a time and test after each replacement.
AOUT_R
AOUT_L
ROUT+
ROUT-
LOUT+
LOUT-
SPK_OFF
AC97RESR
PCBEEP
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:
U10
C120
C122
C123
R110
R[106-108]
R111
J513
CDROM_L
CDROM_R
CDROM_GND
AUDIO DRIVE FAILURE
1. Check if speaker cables are connected
properly.
2. Make sure all the drivers are installed
properly.
Test
OK?
1.Try another known good
speaker, CD-ROM.
2. Exchange another known
good charger board.
Test
OK?
Replace M/B or go
into board-level
Troubleshooting.
Yes
No
Yes
No
U10, U24
U3, J510
J514 C186
C184 C28,29
C70,72 R[34-37]
R[74-77] L38
L65 R79
R38 L19,20
L30 C8
C98 R78
R150 X5
C167 C168
END
Parts: Signals: Parts: Signals: Parts: Signals:
U17
U10
L45
L44
R136
L17,18
C121
C119
L5,23
J2,508
MIC_EXT
8.16 Audio Driver Failure
Symptom:
No sound from speaker after audio driver is installed.