
Barracuda PDA Maintenance
138
Symptom:
Switch Board Function is not working property when pressing the button.
8.8 Switch Board Function Failure
Board
Board
-
-
level
level
Troubleshooting
Troubleshooting
Switch Board
Switch Board
Function Test Error
Function Test Error
Re-connect
It Well
No
No
No
No
Is the
Switch Board Connector
Connected
well?
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:
Signals:
J1
J19
U42
U3
D18
D19
D20
D26
D36
D37
R388
R395
R396
VCC3
VCC_3VSB
VREF_1.25V
BT_TASKS#
BT_MEMO_PAD#
BT_CALENDAR#
BT_CONTACTS#
BUTTON_DET
BUTTON_DET1
BT_FOURWAY_UP#
BT_FOURWAY_DOWN#
Yes
Yes
Replace
Replace
Motherboard
Motherboard
Replace the
Faulty
Switch Board
Yes
Yes
Try another
Try another
known good
known good Switch Board
And Test again
And Test again
ok?
ok?
1. Check if the Switch Board function
Key is install properly.
2. Check the Setup of the programmable
function key.
R397
R398
R399
R387
R392
R393
R394
C120
C121
C124
C119
C118
C122
UCB_IRQ
SFRM_C
RXD_C
SCLK_C
TXD_C
KEY_PRESS#
C123
C125
SW2
SW3
SW4
SW5
SW6
SW7
SW8
SW9
Summary of Contents for Barracuda
Page 5: ...Barracuda PDA Maintenance 4 Block Diagram ...
Page 6: ...Barracuda PDA Maintenance 5 Power Block Diagram ...
Page 18: ...Barracuda PDA Maintenance 17 Typical Audio Amplifier Application Circuit ...
Page 24: ...Barracuda PDA Maintenance 23 Block diagram of the 10 bit ADC circuit ...
Page 26: ...Barracuda PDA Maintenance 25 BLOCK DIAGRAM ...
Page 28: ...Barracuda PDA Maintenance 27 Block Diagram ...
Page 30: ...Barracuda PDA Maintenance 29 GENERAL SPECIFICATIONS ABSOLUTE MAXIMUM RATINGS ...
Page 33: ...Barracuda PDA Maintenance 32 ...
Page 42: ...Barracuda PDA Maintenance 41 ...
Page 43: ...Barracuda PDA Maintenance 42 ...
Page 45: ...Barracuda PDA Maintenance 44 FUNCTIONAL BLOCK DIAGRAM ...
Page 47: ...Barracuda PDA Maintenance 46 Strata Flash Memory Block Diagram ...
Page 54: ...Barracuda PDA Maintenance 53 DS2760 Block Diagram ...
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