Barracuda PDA Maintenance
136
Symptom:
Touch Screen Function is not working property when using Touch Pen on the Touch Screen.
8.7 Touch Screen Function Failure
Board
Board
-
-
level
level
Troubleshooting
Troubleshooting
Touch Screen
Touch Screen
Function Test Error
Function Test Error
Re-connect
It Well
Replace the
Faulty
Touch Screen
Module
No
No
Yes
Yes
No
No
Is the
Touch Screen Cable
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:
J5
L2
L3
L4
L5
U42
U3
VCC3
VREF_1.25V
TSPY
TSMX
TSMY
TSPX
UCB_IRQ
SFRM_C
RXD_C
SCLK_C
TXD_C
Yes
Yes
Replace
Replace
Motherboard
Motherboard
C64
C65
C66
C67
C177
Try another known good
Try another known good
Touch Screen Module
And Test again
And Test again
Ok
Ok
?
?
Содержание Barracuda
Страница 5: ...Barracuda PDA Maintenance 4 Block Diagram ...
Страница 6: ...Barracuda PDA Maintenance 5 Power Block Diagram ...
Страница 18: ...Barracuda PDA Maintenance 17 Typical Audio Amplifier Application Circuit ...
Страница 24: ...Barracuda PDA Maintenance 23 Block diagram of the 10 bit ADC circuit ...
Страница 26: ...Barracuda PDA Maintenance 25 BLOCK DIAGRAM ...
Страница 28: ...Barracuda PDA Maintenance 27 Block Diagram ...
Страница 30: ...Barracuda PDA Maintenance 29 GENERAL SPECIFICATIONS ABSOLUTE MAXIMUM RATINGS ...
Страница 33: ...Barracuda PDA Maintenance 32 ...
Страница 42: ...Barracuda PDA Maintenance 41 ...
Страница 43: ...Barracuda PDA Maintenance 42 ...
Страница 45: ...Barracuda PDA Maintenance 44 FUNCTIONAL BLOCK DIAGRAM ...
Страница 46: ...Barracuda PDA Maintenance 45 1 3 1 2 Strata Flash ROM 1 3 1 2 1 Intel Strata Flash 128M bit Memory Features ...
Страница 47: ...Barracuda PDA Maintenance 46 Strata Flash Memory Block Diagram ...
Страница 54: ...Barracuda PDA Maintenance 53 DS2760 Block Diagram ...
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