Dell 3130cn Service Manual page 216

Step
Checking the HARN ASSY C2 MOT for continuity
Disconnect P/J422 from the PWBA OPT FDR.
10
Disconnect P/J4222 from the DRIVE ASSY OPT FDR.
Is each cable of P/J422 <=> P/J4222 continuous?
Checking the power to DRIVE ASSY OPT FDR
Disconnect the connector of P/J422 on the PWBA OPT
FDR.
11
Is the voltage across ground <=> J422-6pin on the PWBA
OPT FDR, about +24 VDC when the interlock switch
(HARN ASSY INTERLOCK) is pushed?
Checking the connectors of the PWBA OPT FDR and
PWBA MCU for connection
12 Check the connections between the PWBA OPT FDR and
PWBA MCU.
Are P/J419, P/J281 and P/J28 connected surely?
Checking the HARN ASSY FDR UNIT for continuity Dis-
connect P/J419 from the PWBA OPT FDR.
13
Disconnect P/J281 from the HARN ASSY R SIDE.
Is each cable of P/J419 <=> P/J281 continuous?
Checking the HARN ASSY R SIDE for continuity
Disconnect P/J281 from the HARNESS ASSY FDR UNIT.
14
Disconnect P/J28 from the PWBA MCU.
Is each cable of P/J281 <=> P/J28 continuous?
Checking the power to the PWBA OPT FDR
Disconnect the connector of P/J28 on the PWBA MCU.
15 Is the voltage across ground <=> J28-4pin/J28-5pin on the
PWBA MCU, about +24 VDC when the interlock switch
(HARN ASSY INTERLOCK) is pushed?
Version 1 2008.02.15
Check
1 - 190
Chapter 1 Troubleshooting
Yes
Go to step 11. HARN ASSY C2
Replace the
DRIVE ASSY
OPT FDR.
(Refer to Removal
44/Replacement
46)
Go to step 13. P/J419, P/J281
Go to step 14. HARN ASSY FDR
Go to step 15. HARN ASSY R
Replace the
PWBA OPT FDR.
(Refer to Removal (Refer to Removal
44/Replacement 30/Replacement
46)
No
Replace the
MOT.
Go to step 5.
Reconnect the
connector(s)
and/or
P/J28 surely.
Replace the
UNIT.
Replace the
SIDE.
Replace the
PWBA MCU.
14)