Other Control - Canon LBP-2000 Service Manual

G. Other Control
1 . Controlling the main motor
The following shows the circuit used to control the main motor:
DC controller PCB
CPU
The main motor is a 3-phase DC brushless motor with a built-in Hall element, and is mounted to
the motor drive PCB.
The CPU causes the main motor drive signal (MTRON) to go High to rotate the main motor.
When the main motor starts to rotate and reaches a specific revolution, it causes the main motor
rotation detection signal (/MLOK) to go Low.
The CPU will identify a fault in the main motor under any of the following conditions, commu-
nicating to the video controller and indicating 'E011' on the LCD of the control panel:
1 . At the start of warm-up rotation (WMUPR), the /MLOK signal does not go High within 2 sec.
2 . 1.25 sec after the main motor is started, the /MLOK signal is continuously High for 0.1 sec or
m o r e .
3 . 2 sec after the main motor is started, the /MLOK signal is continuously Low for 0.1 sec or
m o r e .
+24VR
J106-8
J106-9
+5V
J106-12
+3.3V
J106-13
J106-10
J106-11
Figure 2-2-16
Main motor
MTRON
M101
/MLOCK
CHAPTER 2
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