Canon 3260 Other Controls Main motor control, Figure below shows the main motor control circuit

CHAPTER 2

F. Other Controls

1. Main motor control

Figure below shows the main motor control circuit.

DC controller PCB

CPU	+24VB
IC201	+5V
P62	38
	+5V
P63	39

J218-5J36-5

-6-6

-1 /MMRDY -1

-2 /MMOTD -2

-3-3

-4-4

Main motor

MT1

M

Figure 2-2-13

The main motor is a DC brushless motor with hall elements, and is unified with the motor drive circuit.

The CPU (IC201) sets the MAIN MOTOR DRIVE signal (/MMOTD) to “L” and rotates the main motor.

When the main motor rotates and reaches its specified speed, it sets the MAIN MOTOR READY signal (/MMRDY) to “L.”

The CPU notifies the video controller PCB of a main motor failure in the following cases:

1)The /MMRDY signal does not become “L” withing 2.5 seconds after from the main motor rotation starts.

2)The /MMRDY signal becomes “L” once, but becomes “H” for more than 0.1 seconds contin- uously during the specified speed rotation.

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