Chapter 2
2-46
2.6.6 Controlling the Reversal Motor (M1)
0011-7324
The following is a diagram of the circuit used to control the reversal motor (M1), which is a 4-phase stepping motor. The circuit has the following functions:
- turning off/on the motor
- controlling the direction of motor rotation
- controlling the speed of motor rotation
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[1] ADF controller PCB
[2] reversal motor drive PCB
M1: reversal motor
PI5: reversal motor clock sensor
The CPU (Q18) on the ADF controller PCB sends various motor control signals to the reversal motor driver PCB, which in turn controls the motor as dictated by
these signals.
T-2-13
2.6.7 Manual Feeder Pickup/Delivery Operation
0011-7325
The machine uses 'manual feeder pickup/delivery' only for fixed reading mode.
1) When an original is placed in the manual feeder, the manual feeder placement sensor (PI12) detects it.
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2) When the Start key is pressed, the machine uses the delivery roller to move the original until the lead edge of the original butts against the manual feeder regis-
tration roller (thus removing the skew).
F-2-116
3) The machine moves the original to move the delivery roller and the transport belt. The original stops when its lead edge reaches the reversal sensor (S1).
Signal name
Description
INA
phase control (direction and speed of rotation)
INB
phase control (direction and speed of rotation)
IN_A
phase control (direction and speed of rotation)
IN_B
phase control (direction and speed of rotation)
T-Vref
motor rotation torque setting
IC18
CPU
Q601
+24U
+24R
A
A*
B
B*
M1
+5R
IN_B
IN_A
INB
INA
T-Vref
J602
J71
J6
PI 5
J14
TRCLK
13
12
11
10
9
8
7
6
5
4
3
2
1
1
2
3
4
5
6
7
8
9
10
11
12
13
B9
3
1
4
6
2
5
[1]
Manual feeder placement sensor(PI12)
Manual feeder registration sensor(S9)
Содержание DADF-Q1
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