8. Scanner Motor Control Circuit
a. Outline
Figure 3-215 shows the circuit that controls the
scanner motor, and the circuit has the following
functions:
1 Turns ON/OFF the scanner motor.
2 Controls the direction of rotation of the
scanner motor.
3 Controls the speed of rotation of the scan-
ner motor.
b. Stopping the Motor
When the scanner motor drive control signal
(
) goes ‘1’, the drive turns OFF to stop the
motor.
c. Moving the Scanner Forward
When the scanner motor drive control signal
(
) goes ‘0’ and the scanner forward signal
(M2F/R) goes ‘1’, the drive circuit turns ON to
rotate the scanner motor clockwise, thereby mov-
ing the scanner forward.
d. Moving the Scanner in Reverse
When the scanner motor drive signal (
)
goes ‘0’ and the scanner forward signal (M2F/R)
goes ‘0’, the drive circuit turns ON to rotate the
scanner motor counterclockwise, thereby moving
the scanner in reverse.
e. Controlling the Speed of the Scanner Motor
The microprocessor on the DC controller PCB
sends the scanner speed signal (M2FS) to the
scanner motor driver PCB according to the select-
ed reproduction ratio.
M2ON
M2ON
M2ON
3. OPERATIONS AND TIMING
COPYRIGHT © 1996 CANON INC.
CANON NP6085 REV.0 JULY 1996 PRINTED IN JAPAN (IMPRIME AU JAPON)
3-45
Scanner
motor
Rotor
Hall
IC
U
W
M2CLK
V
Scanner motor driver PCB
DC controller PCB
Motor stop
circuit
Motor drive circuit
Motor rotation speed
control circuit
J220
8
J124
A2
J220
6
J124
A4
J220
7
J124
A3
J220
9
J124
A1
5
A5
4
A6
3
A7
1
J220
2
J124
A8
M2BRK
M2F/R
M2ON
M2CLK
M2MD2
M2MD1
M2MD0
M2FG
M2FS
J124
A9
Figure 3-215
Содержание NP6085
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Страница 498: ...COPYRIGHT 1996 CANON INC CANON NP6085 REV 0 JULY 1996 PRINTED IN JAPAN IMPRIME AU JAPON A 5 ...
Страница 502: ...PRINTED IN JAPAN IMPRIME AU JAPON 0697AB0 6 3 This publication is printed on 70 reprocessed paper ...