FrameMaker Ver.5.5(PC) EP1054/EP1085/EP2030 MECHANICAL/ELECTRICAL
98.04.24
M-25
The Scanner starts the scan motion as 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.
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.
Current 1 H H L
Current 2 H L H
Operation
When the scan
speed reaches a
given level.
At scan start and dur-
ing scan decelera-
tion.
At return start and
during return motion.
Control Signal Energized Deenergized WIRING DIAGRAM
M5
Scan Signal
PWB-F (23 cpm Copier)
PWB-E (15/18 cpm
Copier)
LH
8-D/8-H
M5
Current
Switching
Signal 1
PWB-F (23 cpm Copier)
PWB-E (15/18 cpm
Copier)
LH
M5
Current
Switching
Signal 2
PWB-F (23 cpm Copier)
PWB-E (15/18 cpm
Copier)
LH
Control Signal Blocked Unblocked WIRING DIAGRAM
PC81 PWB-A PJ17A-7B L H 11-A
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