Figure 5-7.
Solenoid and clutch locations
Drum motor control
The drum motor control controls the drive of the drum motor (M3).
The drum motor is a three-phase, eight-pole DC motor with a built-in drive circuit. The drum
motor drives the four color photosensitive drums, the K (black) developing cylinder, and the
ITB. The drum motor operates under the control of the DRUM MOTOR ACCELERATION
signal (/DRMITBACC) and the DRUM MOTOR DECELERATION signal (/DRMITBDEC)
from the DC controller.
Figure 5-8.
Drum motor control circuit
The DC controller monitors the DRUM MOTOR SPEED DETECTION signal (/DRMITBFG)
to control the RPM of the drum motor.
124 Chapter 5 Theory of operation ENWW