Toshiba MJ-1104 Service Manual page 66

[D] Saddle transport motor drive circuit
The saddle transport motor drive circuit controls the rotation and stoppage, rotational direction and
motor current of the saddle transport motor.
The saddle transport motor is driven by pulse signals (MOT2-OUT1A, MOT2-OUT1B, MOT2-OUT2A
and MOT2-OUT2B) output from the motor driver (IC8) under the command of a clock signal (TIOCA0),
a rotational direction signal (MOT2-DIR) and current setting signals (MOT2-CUR1 and MOT2-CUR0)
from the CPU of the saddle control PC board, and thus this motor rotates the transport roller and the
ejecting roller, and drives the paper holding cam in conjunction with the paper holding clutch.
MOT2-
TIOCA0
DIR
Clock signal H
Clock signal H
Clock signal L
Clock signal L
- -
Saddle control PC board
IC31
CPU
MOT2-CUR0
MOT2-CUR1
MJ-1103/1104
DESCRIPTION OF OPERATIONS
MOT2- MOT2-
Motor rotation
CUR1 CUR0
L H Normal (Low power)
L L Normal (Low power)
L H Reverse (Low power)
L L Reverse (Low power)
H -
3.3V
TIOCA0 10
MOT2-DIR 16
P-RESET 15
P-RESET
Motor driver
Current
13
control
circuit
Paper is transported
(at a transport speed lower than 200 mm/
s).
Paper is transported
(at a transport speed 400 mm/s or higher).
Paper is transported
(at a transport speed lower than 200 mm/
s).
Paper is transported
(at a transport speed 400 mm/s or higher).
Stop
VM
1 MOT2-A
2
3 MOT2-C
4
IC8
23 MOT2-B
22
21 MOT2-D
20
SG
Fig. 3-44
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Remarks
Saddle
transport motor
(M16)