Dell 3130cn Service Manual page 256

Step
Checking the connectors of the PWBA DUP-H and PWBA
MCU for connection
18 Check the connections between the PWBA DUP-H and
PWBA MCU.
Are P/J428, P/J2720, P/J272 and P/J27 connected surely?
Checking the HARNESS ASSY DUP UNIT for continuity
Disconnect P/J428 from the PWBA DUP-H.
19 Disconnect P/J2720 from the HARN ASSY FRONT
COVER.
Is each cable of P/J428 <=> P/J2720 continuous?
Checking the HARNESS ASSY FRONT COVER for conti-
nuity
20 Disconnect P/J2720 from the HARNESS ASSY DUP UNIT.
Disconnect P/J272 from the HARN ASSY R SIDE.
Is each cable of P/J2720 <=> P/J272 continuous?
Checking the HARN ASSY R SIDE for continuity
Disconnect P/J272 from the HARNESS ASSY FRONT
21 COVER.
Disconnect P/J27 from the PWBA MCU.
Is each cable of P/J272 <=> P/J27 continuous?
Checking the power to the PWBA DUP-H
Disconnect the connector of P/J27 on the PWBA MCU.
22
Is the voltage across ground <=> J27-15pin on the PWBA
MCU, about +3.3 VDC?
Checking the connectors of the PWBA DUP-H and
MOTOR ASSY DUP for connection
23 Check the connections between the PWBA DUP-H and
MOTOR ASSY DUP.
Are P/J429 connected surely?
Checking the power to the MOTOR ASSY DUP
Disconnect the connector of P/J429 on the PWBA DUP.
24
Is the voltage across ground <=> J429-2pin on the PWBA
DUP, about +24 VDC?
Version 1 2008.02.15
Check
1 - 230
Chapter 1 Troubleshooting
Yes
Go to step 19. P/J428, P/J2720,
Replace the HAR-
Go to step 20. NESS ASSY DUP
Replace the HAR-
Go to step 21.
FRONT COVER.
Go to step 22. HARN ASSY R
Replace the
FEEDER ASSY
DUP
(Refer to Removal
(Refer to Removal
30/ Replacement
5/ Replacement
39.)
Go to step 24.
Replace the
FEEDER ASSY
DUP
(Refer to Removal
5/ Replacement
39.)
No
Reconnect the
connector(s)
P/J272 and/or
P/J27 surely.
UNIT.
NESS ASSY
Replace the
SIDE.
Replace the
PWBA MCU.
14.)
Reconnect the
connector(s)
P/J429 surely.
Go to step 18.