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8.6 Audio Function Failure
Symptom:
No sound from speaker after audio driver is installed.
Audio Function Failure
1. Check the internal speaker cables or
External Speaker are connected properly.
2. Make sure all the drivers are installed
properly.
YES
Test
OK?
Try another known good speaker.
YES
Test
OK?
END
Replace M/B or go into
board-level
Troubleshooting.
Barracuda PDA Maintenance
NO
NO
NO
Board-level Troubleshooting
audio function test error.
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.
1. If no sound
cause of line out,
check the following
parts & signals:
Parts:
Signals:
U13
R56
LOUT_L
U16
C214
LOUT_R
U42
C213
SFRM_C
U3
Q41
SCLK_C
Speaker
U14
TXD_C
J4
R386
RXD_C
JR1
R389
L3_I2C_SDA
C58
R390
L3_I2C_SCL
C59
R391
L3_I2C_MODE
R58
R369
SPAK_MO+
R61
AMP_PW_EN#
R260
SSP_TXD
L22
SSP_RXD
L23
CLK_SSP
For
2. If no sound
cause of MIC,
check the following
parts & signals:
Parts:
Signals:
MIC
MIC_IN
C55
MIC_IN_R
C50
MIC_IN_L
C54
SW2
R370
RECORD#
C242
WHEEL_DET
C236
WHEEL_DOWN#
R53
WHEEL_UP#
SW2
WHEEL_ENTER#
R358
U14
U15
134
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