Toshiba MJ-1103, Service Manual

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MJ-1103/1104 © 2008, 2009 TOSHIBA TEC CORPORATION All rights reserved
DESCRIPTION OF OPERATIONS
3 - 38
[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.
Fig. 3-44
TIOCA0
MOT2-
DIR
MOT2-
CUR1
MOT2-
CUR0
Motor rotation Remarks
Clock signal H L H Normal (Low power) Paper is transported
(at a transport speed lower than 200 mm/
s).
Clock signal H L L Normal (Low power) Paper is transported
(at a transport speed 400 mm/s or higher).
Clock signal L L H Reverse (Low power) Paper is transported
(at a transport speed lower than 200 mm/
s).
Clock signal L L L Reverse (Low power) Paper is transported
(at a transport speed 400 mm/s or higher).
- - H - Stop
IC31
CPU
TIOCA0
MOT2-CUR1
MOT2-A
VM
MOT2-C
MOT2-B
MOT2-D
SG
MOT2-DIR
1
21
3
23
15
16
10
13
P-RESET
P-RESET
3.3V
IC8
Motor driver
2
4
22
20
MOT2-CUR0
CN8
Saddle
transport motor
(M16)
Saddle control PC board
Current
control
circuit