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8.8 Switch Board Function Failure
Symptom:
Switch Board Function is not working property when pressing the button.
Switch Board
Switch Board
Function Test Error
Function Test Error
1. Check if the Switch Board function
Key is install properly.
2. Check the Setup of the programmable
function key.
Is the
Switch Board Connector
Connected
well?
Yes
Yes
Try another
Try another
known good Switch Board
known good
And Test again
And Test again
ok?
ok?
No
No
Replace
Replace
Motherboard
Motherboard
Barracuda PDA Maintenance
No
No
Re-connect
It Well
Yes
Yes
Replace the
Faulty
Switch Board
Board-
Board
Troubleshooting
Troubleshooting
Check the following parts for cold solder or one of the following parts on
the mother-board may be defective, use an oscilloscope to check the
following signal or replace the parts one at a time and test after each
replacement.
Parts:
J1
R397
C123
J19
R398
C125
U42
R399
SW2
U3
R387
SW3
D18
R392
SW4
D19
R393
SW5
D20
R394
SW6
D26
C120
SW7
D36
C121
SW8
D37
C124
SW9
R388
C119
R395
C118
R396
C122
-
level
level
Signals:
VCC3
UCB_IRQ
VCC_3VSB
SFRM_C
VREF_1.25V
RXD_C
BT_TASKS#
SCLK_C
BT_MEMO_PAD#
TXD_C
BT_CALENDAR#
KEY_PRESS#
BT_CONTACTS#
BUTTON_DET
BUTTON_DET1
BT_FOURWAY_UP#
BT_FOURWAY_DOWN#
138
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