Dell 2135cn Service Manual page 486

Clutch and Solenoid name
(Diag. Code)
Yellow Toner Motor(DO-21)
Magenta Toner Motor (DO-
23)
Cyan Toner Motor (DO-25)
Black Toner Motor (DO-27)
Version 1 2008.02.01
NOTE: These procedures are for the technical staff. Described below
is the check procedure common among the four toner motor. Note the
operation for the toner in the PHD ASSY spills if the motor is rotated
for a long time.
1) Turn on the power and enter the Printer Diag.
2) Open the Cover and remove the toner cartridge.
3) Open the toner cartridge holder.
4) Execute the DO-21, DO-23, DO-25 or DO-27.
5) Check the TONER MOTER rotation.
6) Press the "Cancel" key to stop the test.
7) Replace the toner cartridge and close the toner cartridge
holder.
8) Close the Cover.
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Chapter 2 Operation of Diag.
Confirmation procedure
Gear
Mnt02016KA