Table of Contents
Advertisement
8.1 No Power
When the power button is pressed, nothing happens ,power indicator does not light up.
No power
No power
Is the
PDA connected
to power AC adaptor
or battery)?
Yes
Yes
1. Check the J20 Power Connector.
2. Try another known good battery or AC adapter.
Power
Power
OK?
OK?
No
No
Replace
Replace
Motherboard
Motherboard
Barracuda PDA Maintenance
Connect
No
No
AC adaptor
or battery
Replace the faulty
Yes
Yes
AC adaptor or
The Battery or
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:
J20
U25
Q22
D7
U48
Q23
Q19
L18
D15
L13
Q53
U32
Q13
D27
Q54
D9
D34
Q16
Q42
D10
Q43
Q17
Q34
C159
U29
Q19
Q18
C162
D2
U39
L21
BT1
SW7
Q6
Q49
SW9
Q5
U26
Q51
L17
Q52
Q50
U45
-
level
level
Signals:
VCC_P+
BAT_IN
VCC_IN
BK_VCC
VCC_3VSB
BACK_DET
VCC_CORE
SA_BATT_FAULT
VCC3
SA_PWR_EN
5V_ON
PROTECT
IRDA_3V
SA_PWR_EN#
VCC_AUD
BAT_FAULT_IRQ#
VCC_LCD
5V_PWR_ON
VCC_5V
IR_EN#
VCC_+15
AUD_PWR_ON#
VCC_-15
LCD_PWR_ON#
122
Advertisement
Table of Contents
