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DRIVE SECTION
[3] M1 (Main) Control
24VDC
PGND
DCPS2
M1 CONT
M1 EM
CLK
PRCB
M1 (main) is controlled by the PRCB (printer control
board) and the motor drive power is supplied from
DCPS2 (DC power supply unit 2).
1. Operation
M1 is a motor driven by 24V DC. It drives fixing
upper and lower rollers, paper conveyance belts,
and thick paper conveyance roller. M1 incorpo-
rates a speed controller circuit to send a signal
indicating abnormal rotation to PRCB when the
PLL lock has been released for longer than the
specified period of time.
M1 starts rotating when the START PRINT but-
ton is pressed and stops when the last copied
paper has been ejected. During the warm-up
operation, M1 rotates to rotate the fixing rollers.
When either one of the front doors of this
machine opens or closes, MS1 (interlock 1) or
MS2 (interlock 2) actuates to stop supplying the
DC power to the motor, causing the M1 to stop.
2. Signals
a.
Input signal
(1) M1 EM (M1 to PRCB)
M1 fault detection signal.
[H]: Abnormal rotation (PLL lock has been
released for 2 to 3 seconds or longer.)
[L]: Normal rotation
b.
Output signal
(1) M1 CONT (PRCB to M1)
M1 drive control signal.
[H]: M1 ON
[L]: M1 OFF
(2) CLK (PRCB to M1)
Clock signal for M1.
MS2
MS1
M1
2-B-2
[4] M2 (Drum) Control
24VDC
PGND
DCPS2
M2CONT
M2 F/R
SGND
M2 EN
PRCB
M2 (drum) is controlled by the PRCB (printer control
board) and the motor drive power is supplied from
DCPS2 (DC power supply unit 2).
1. Operation
M2 is a motor driven by 24V DC. It drives a drum,
toner guide brush, toner guide shaft, toner con-
veyance screw, and separation claw swing sec-
tions. M2 incorporates a speed sensor (encoder)
to send a feedback signal to PRCB. Using this
signal, PRCB detects the rotational speed and
calculates the PWM duty to be given to the
motor, controlling the M2 speed. In addition to
the speed sensor, M2 also has a flywheel mech-
anism to ensure accurate and steady rotation.
M2 starts rotating when the START PRINT but-
ton is pressed and stops when the last copied
paper has been ejected.
When either one of the front doors of this
machine opens or closes, MS2 (interlock 1) or
MS2 (interlock 2) actuates to stop supplying the
DC power to the motor, causing the M2 to stop.
2. Signals
a.
Input signal
(1) M2 EN (M2 to PRCB)
M2 motor encoder signal.
b.
Output signals
(1) M2 CONT (PRCB to M2)
M2 drive control signal (PCOM).
[L]: M2 ON
[H]: M2 OFF
(2) M2 F/R (PRCB to M4)
M2 rotational direction switchover signal.
[H]: CCW (relative to motor shaft)
[L]: CW (relative to motor shaft)
MS2
MS1
M2
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