Minolta EP3010 Manual page 48

The Scanner starts the scan motion when a Scan signal is output from the Master Board.
At the start of a scan motion and other heavy load conditions, the Scanner Motor requires a
large amount of current. The Current 1 or 2 signal from the Motor Drive Board is selected
accordingly to vary the amount of current supplied to the Scanner Motor.
The Current signal selection timing is controlled by software.
Current 1
Current 2
Operation
On receiving the Scan signal, the Motor Drive Board applies motor drive pulses, which are
out of phase with each other, to the Scanner Motor. The motor speed is varied by changing
the width of the pulses applied to the Scanner Motor.
M4
PWB-F
Scan Signal
M4
Current
PWB-F
Switching
Signal 1
M4
Current
PWB-F
Switching
Signal 2
PC81 PWB-A PJ39A-1
H
H
When the scan
speed reaches a
given level.
Control Signal Energized
Control Signal
M-30
H
L
At scan start and dur-
ing scan decelera-
tion.
Deenergized WIRING DIAGRAM
L H
L H
L H
Blocked Unblocked
L H
L
H
At return start and
during return motion.
8-D
WIRING DIAGRAM
7-B