Sony UP-D70 Service Manual page 54

2. Mechanism Control Section
a) Capstan motor control
Capstan is driven by a stepping motor. Excitation system of stepping motor uses 1-2 phase
excitation system (negative logic). This motor (CN4-2, 5) rotates paper delivery roller and
capstan by head position and combination.
Drive IC, IC101 (MEC-11 board) performs constant current drive. And when printing 150dpi,
width of 1 line becomes two times by rotating two times motor speed.
b) Head motor drive
This motor performs the thermal head up and down. This motor and head home position
sensor (described later) move thermal head four positions, home, paper feed, paper sending,
printing. (CN4-10, 11)
Drive IC is IC102 (MEC-11 board).
CN4-10pin
UP 1
DOWN 0
BRAKE 1
OTHERS 0
c) Paper feed lever motor drive
This motor performs paper feed lever up and down. Paper feed lever has three positions,
home, printing, paper feed. (CN4-8, 9)
Drive IC is IC105 (MEC-11 board).
CN4-8pin
UP 1
DOWN 0
BRAKE 1
OTHERS 0
d) Paper feed roller motor drive
This motor rotates paper feed roller, pick-up roller and bar-code gear. When paper feed lever
is placed at printing, bar-code gear transmits power by rotating reversely. And when yellow
printing, rotation of paper feed roller is controlled by PWM driving. (CN4-6, 7)
Drive IC is IC106 (MEC-11 board).
CN4-6pin
Feeding direction 1
Reverse direction 0
BRAKE 1
OTHERS 0
4-6
CN4-11pin
0
1
1
0
CN4-9pin
0
1
1
0
CN4-7pin
0
1
1
0
UP-D70/D70A (UC,CE)