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