Dell 2135cn Service Manual page 254

Step
Checking the connectors of the K Mode Sensor in the
DRIVE ASSY PH for connection
Check the connections between the PWBA MCU and K
Mode Sensor.
Are P/J26 and P/J261 connected correctly?
9
Does the error still occur when the power is turned OFF and
10
ON?
Checking the HARN ASSY KSNR REGCL for continuity
Disconnect J26 from the PWBA MCU.
11
Disconnect J261 from the K Mode Sensor.
Is each cable of J26 <=> J261 continuous?
Checking the power to the K Mode Sensor
Disconnect J26 from the PWBA MCU.
12
Is the voltage across P26-1pin <=> ground on the PWBA
MCU, about +3.3 VDC?
Checking the K Mode Sensor for operation
Remove the DRIVE ASSY PH from the printer once, but P/
J261 and P/J24 should be connected.
Checked by [Digital Input]-[DI-04] of [IOT Diag] in [Printer
13
Diag] of diagnosis.
During this check, close the COVER ASSY FRONT.
Does the voltage change, when a piece of paper is inserted
into the gap of the K Mode Sensor?
Version 1 2008.02.01
Check
1 - 226
Chapter 1 Troubleshooting
Remedy
Yes
Reconnect the
connector(s) P/
Go to step 11. J26 and/or P/
J261correctly,
then go to step 10.
Go to step 11. End of work.
Replace the
Go to step 12. HARN ASSY
KSNR REGCL.
Replace the
PWBA MCU.
Go to step 13. (Refer to Removal
35/ Replacement
16.)
Replace the Replace the
PWBA MCU. DRIVE ASSY PH.
(Refer to Removal (Refer to Removal
35/ Replacement 23/ Replacement
16.) 28.)
No