Service manual

The specifications of each motor are listed in the following table.
Table 4-2 Motor specifications
Name Purpose Type Direction of
rotation
Failure detection
Motor Main motor (M1) Drive ETB belt,
photosensitive
drum and
developing cylinder
DC motor CW Yes
Fuser/delivery
motor (M2)
Drive fuser
pressure roller,
delivery roller and
automatic release
of fuser pressure
Stepping motor CW/CCW No
Pickup motor (M3) Drive pickup roller
and registration
roller
Stepping motor CW No
Fan (FM1) Cool down around
cartridge
DC motor — Yes
Main motor failure detection
The CPU determines the main motor failure, stops the printer, and notifies the formatter of error
status, when it encounters the following conditions.
● Main motor start-up abnormality
The interval of the MAIN MOTOR SPEED DETECTION signal (/MAINMFG) does not become
the specified interval after 1000 ms of the main motor drive start.
● Main motor rotation abnormality
The interval of the /MAINMFG signal stays at an irregular interval for 100 ms and longer after
once it has become the specified interval.
Fan motor failure detection
The CPU determines the fan motor failure and notifies the formatter when it encounters the following
condition.
The FAN LOCK signal (FANLCK) is “H” for approximately 10 seconds and longer during fan motor
rotation.
38 Chapter 4 Operational theory ENWW