Dell 3130cn Service Manual page 226

Step
Checking the HARN ASSY R SIDE for continuity
Disconnect P/J27 from the PWBA MCU.
10 Disconnect P/J272 from the HARNESS ASSY FRONT
COVER.
Is each cable of P/J27 <=> P/J272 continuous?
Checking the power to ADC SENSOR
Disconnect the connector of P/J27 on PWBA MCU.
11
Is the voltage across ground <=> J27-7pin on the PWBA
MCU, about +5 VDC?
Checking after replacing the corresponding CARTRIDGE
ASSY
12 Replace the CARTRIDGE ASSY. (Refer to Removal 6/
Replacement 38)
Does the error still occur when the power is turned ON?
Version 1 2008.02.15
Check
1 - 200
Chapter 1 Troubleshooting
Yes
Go to step 11. HARN ASSY R
Replace the
TRANSFER
ASSY. (Refer to (Refer to Removal
Removal 4/ 30/Replacement
Replacement 40)
Replace the ROS
ASSY. (Refer to
Removal 36/
Replacement 8)
No
Replace the
SIDE.
Replace the
PWBA MCU.
14)
End of work