NEC Barracuda Service Manual page 129

Pda
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8.3 Memory Test Error
Symptom:
An error message of memory failure is shown.
Memory Test Error
Memory Test Error
Remove All external IO device.
( EX: SD Card & Cradle device) from the PDA.
Is the
Memory fail error message
still occur?
Yes
Yes
Re-
-
flash The image and test again.
Re
flash The image and test again.
Yes
Yes
Test ok?
Test ok?
No
No
Replace
Replace
Motherboard
Motherboard
Barracuda PDA Maintenance
No
No
Replace the
External
IO device
Correct
the image
setting
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
J15
J16
U5
U7
U6
U46
U3
U10
U12
-
level
level
Signals:
SA_A[0:25]
SA_SDCAS#
SA_D[0:15]
SA_SDRAS#
SA_D[16:31]
SA_SDCKE0
SA_PSKTSE#
SA_SDCKE1
SA_PREG#
SA_RD/WR#
SA_PWE#
SA_RDY
SA_POE#
DQM[0:3]
SA_PIOW#
SA_PIOR#
SA_SDCS0#
SA_SDCS1#
SA_SDCS2#
SA_SDCS3#
SA_WE#
128

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