Dell 2135CN, Service Manual

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Chapter 1 Troubleshooting
Version 1 2008.02.01
FIP-1. 87 093-965 Reseat PHD Unit
Step Check
Remedy
Yes No
Possible causative parts:
PHD UNIT (PL4.1.21)
PWBA MCU (PL10.7.7)
HARN ASSY PHD XPRO (PL10.8.11)
1
Does the error still occur when the power is turned OFF and
ON?
Go to step 2. End of work.
2
Checking the PHD UNIT type
Is the seated PHD UNIT for 2135c?
Go to step 4.
Replace the PHD
UNIT for 2135c,
then go to step 3.
3
Does the error still occur when the power is turned OFF and
ON?
Go to step 4. End of work.
4
Checking after reseating the PHD UNIT
Reseat the PHD UNIT.
Does the error still occur when the power is turned OFF and
ON?
Go to step 5. End of work.
5
Checking the connectors for connection
Check the connectors between the PWBA MCU and PHD
UNIT.
Are P/J42 and P/J422 connected correctly?
Go to step 7.
Reconnect the
connector(s) P/
J42 and/or P/J422
surly, then go to
step 6.
6
Does the error still occur when the power is turned OFF and
ON?
Go to step 7. End of work.
7
Checking the HARN ASSY PHD XPRO for continuity
Disconnect P422 from the PHD UNIT.
Disconnect J42 from the PWBA MCU.
Is each cable of P422 <=> J42 continuous?
Go to step 8.
Replace the
HARN ASSY PHD
XPRO.
8
Checking after replacing the PHD UNIT
Replace the PHD UNIT. (Refer to Removal 3/Replacement
57.)
Does the error still occur when the power is turned OFF and
ON? Replace the
PWBA MCU.
(Refer to Removal
31/ Replacement
29.)
End of work.