Dell 3130cn Service Manual page 268

Step
Checking the SENSOR PHOTO (CST NO PAPER) for
operation
Does the number on the screen increase by one, every
8 time the actuator of the SENSOR PHOTO: CST NO
PAPER is operated?
Checked by [Digital Input] - [DI-d(Control Panel)/CST2 NO
PAPER(PC)] in diagnosis.
Checking the ACTUATOR ASSY MSI for operation
9
Does the ACTUATOR ASSY MSI operate smoothly?
Checking the SENSOR PHOTO (MPF NO PAPER) for
operation
Does the number on the screen increase by one, every
10 time the actuator of the SENSOR PHOTO (MSI NO
PAPER) is operated?
Checked by [Digital Input] - [DI-10(Control Panel)/MSI NO
PAPER(PC)] in diagnosis.
Checking the connectors of the SENSOR PHOTO (CST
NO PAPER SENSOR) for connection
11 Check the connections between the PWBA MCU and
SENSOR PHOTO (CST NO PAPER SENSOR).
Are P/J29, P/J292 and P/J2921 connected surely?
Checking the HARN ASSY R SIDE for continuity
Disconnect P/J29 form the PWBA MCU.
12
Disconnect P/J292 from the HARN ASSY REGI SNR.
Is each cable of P/J29 <=> P/J292 continuous?
Checking the HARNESS ASSY REGI SNR for continuity
Disconnect P/J292 form the HARN ASSY R SIDE.
13 Disconnect P/J2921 from the SENSOR PHOTO (CST NO
PAPER SENSOR).
Is each cable of P/J292 <=> P/J2921 continuous?
Checking the power to SENSOR PHOTO (CST NO
PAPER SENSOR)
14 Disconnect P/J29 on the PWBA MCU.
Is the voltage across ground <=> J29-5pin on the PWBA
MCU, about +3.3 VDC?
Checking the SENSOR PHOTO (CST NO PAPER SEN-
SOR) for operation
Measure the voltage across ground <=> J29-7pin on the
15 PWBA MCU.
Does the voltage change, every time the ACTUATOR NO
PAPER A4 of the SENSOR PHOTO (CST NO PAPER
SENSOR) is operated?
Checking the connectors of the SENSOR PHOTO (CST
NO PAPER SENSOR) for connection
16 Check the connections between the PWBA OPT FDR and
SENSOR PHOTO (CST NO PAPER SENSOR).
Are P/J421, P/J4212 and P/J42121 connected surely?
Version 1 2008.02.15
Check
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Chapter 1 Troubleshooting
Yes
Replace the
PWBA MCU.
(Refer to Removal
30/Replacement
14)
Go to step 10.
Replace the
PWBA MCU.
(Refer to Removal
30/Replacement
14)
Go to step 12.
and/or P/J2921
Go to step 13. HARN ASSY R
Go to step 14.
Go to step 15. (Refer to Removal
30/Replacement
Replace the
Replace the SEN-
PWBA MCU.
(Refer to Removal
(CST NO PAPER
30/Replacement
14.)
Go to step 17. P/J421, P/J4212
and/or P/J42121
No
Go to step 16.
Replace the
ACTUATOR
ASSY MSI.
Go to step 26.
Reconnect the
connector(s)
P/J29, P/J292
surely.
Replace the
SIDE.
Replace the
HARN ASSY
REGI SNR.
Replace the
PWBA MCU.
14.)
SOR PHOTO
SENSOR).
Reconnect the
connector(s)
surely.