Dell 3115cn Service Manual page 377

Clutch and Solenoid name
(Diag. Code)
PH Motor (DO-a/DO-b/DO-c/
DO-d)
Version 1 2006.11.21
NOTE: This procedure is for the technical staff. The customer check
is the procedure 1, 4 and 5. The PH motor is in the FEED DRIVE.
When performing operation for five minutes or longer with the
front cover open, remove all toner cartridges, and cover the drum
to avoid exposure to light.
The rotational speed of the motor is as follows.
DO-d<DO-c<DO-a<DO-b
1) Turn on the power and enter the Printer Diag.
2) Open the Front Cover.
3) Cheat the safety Interlock System.
4) Execute the DO-a. (The customer can confirm the motor noise
only.)
5) Press the "Cancel" key to stop test.
6) Remove the cheater.
7) Close the Front Cover.
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Chapter 2 Operation of Diag.
Confirmation procedure
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