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Prestigio Cavaliere 141
8.13 Audio Failure
Symptom:
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.
Yes
Test
OK?
1.Try another known good speaker,
CD-ROM.
2. Exchange another known good
charger board.
Yes
Re-test
OK?
Board-level
Troubleshooting
Correct it.
Replace
Motherboard
Correct it.
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.
1.If no sound cause
2. If no sound cause
of line out, check
the following
parts & signals:
Signals:
Parts:
U516
C266
AOUT_R
U521
C267
AOUT_L
U522
R714
ROUT+
J3
R713
ROUT-
J501
R205
LOUT+
C269
R206
LOUT-
C265
L501
AC97_RESET#
C264
L502
C774
Charge BD
127
Technical Service Manual
3. If no sound cause
of MIC, check
of CD-ROM, check
the following
the following
parts & signals:
parts & signals:
Parts:
Signals:
Parts:
U522
MIC
U516
C814
MIC_VREF
U522
L34
C806
L37
C811
L541
C805
L542
R728
J515
R733
MIC1
R725
R731
R729
J512
Signals:
CDROM_L
CDROM_R
CDROM_GND
CDROM_LEFT
CDROM_RIGHT
CD_COMM
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