Controlling The Cartridge Motor - Canon CP660 Service Manual

CHAPTER 4 IMAGE FORMATION SYSTEM
B.

Controlling the Cartridge Motor

DC controller PCB
D-CPU
(IC201)
Expansion I/O
(IC203)
A9
B4
B3
A10
M-CPU
(IC202)
The cartridge motor is a 2-phase stepping motor, and is controlled by the cartridge
motor driver (IC5001) on the high-voltage PCB 1 to drive the developing cylinder of the
color toner cartridge and the developing cylinder.
In response to a print sequence command from the D-CPU (IC202), the M-CPU
(IC201) sends the cartridge motor control signals (SLVPHA, SLVPHA*, SLVPHB,
SLVPHB*) to IC5005 on the high-voltage PCB through the expansion I/O (IC203).
IC5005 uses these signals to supply the motor with drive signals (SLVPHA, SLVPHA*,
SLVPHB, SLVPHB*) to rotate the developing cylinders of the color toner cartridges and
the black toner cartridges.
The machine's drive gear arrangement would cause the developing cylinder of the
color toner cartridges and the developing cylinder of the black toner cartridge to rotate in
opposite directions if the cartridge motor was rotated in a single direction. To avoid this,
IC5005 rotates the motor clockwise when the color toner cartridge is used, while it rotates
the motor counterclockwise when the black toner cartridge is used.
4-36
COPYRIGHT © 1999 CANON INC.
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High-voltage PCB 1
SL VPHA*
SL VPHB*
SLVPHB
SLVPHA
Figure 4-702
CANON 660/2100 REV.0 FEB. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)
Cartridge motor
+24UH
driver
(IC5005)
7 7
+24UH
12 12
SLVPHA
5 5 8 8
SLVPHA*
11 11
17 17
SLVPHB
18 18
16 16
SLVHPB*
6 6
1 1
Cartridge
J5003-1
motor
-2
-3
M3
-4
-5