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ADU
2. Signals
a.
PRCB input signals
(1) PS54 (PS54 to PRCB)
Loop formation reference timing detection sig-
nal.
The leading edge or trailing edge of paper is
detected.
[L]: Paper exists
[H]: Paper does not exist
b.
ADUSDB input signal
(1) M12 EM (M12 to ADUSDB to PRCB)
M12 fault detection signal.
[L]: Normal
[H]: Abnormal
(2) PS1 VIDEO (PS1 to ADUSDB to PRCB)
PS1 sensor output signal.
(3) PS44 (PS44 to ADUSDB to PRCB)
Second paper feed reference timing detection
signal.
[L]: Paper exists
[H]: Paper does not exist
(4) PS45 (PS45 to ADUSDB to PRCB)
Paper leading edge detection signal (reference
timing for various control operations)
[L]: Paper exists
[H]: Paper does not exist
c.
ADUSDB output signals
(1) M12 CONT (ADUSDB to M12)
M12 drive control signal.
[L]: M12 ON
[H]: M12 OFF
(2) M12 CLK (ADUSDB to M12)
M12 clock signal.
(3) MC1 CONT (ADUSDB to MC1)
MC1 drive control signal.
[L]: MC1 ON
[H]: MC1 OFF
(4) PS1 SI (ADUSDB to PS1)
PS1 start pulse.
(5) PS1 CLK (ADUSDB to PS1)
PS1 drive clock signal.
(6) PS1 LED (ADUSDB to PS1)
PS1 LED control signal.
[4] Paper Conveyance Control
PRCB
Conveyance of the paper fed from the second paper
feed unit is controlled by the pre-transfer roller driven
by M9 (transfer). M9 is controlled by the PRCB (printer
control board) via the ADUSDB (ADU stand drive
board). When the front right or left door of this machine
opens or closes, MS1 (interlock 1) or MS2 (interlock 2)
operates to interrupt the DC power supply to the motor,
stopping M9.
1. Operation
A 24V stepping motor is used for M9 in order to
drive constantly at low speed.
2. Signals
a.
Output signals
(1) M9 DRIVE A, A (M9 to ADUSDB)
M9 A-phase drive control pulse signal.
(2) M9 DRIVE B, B (M9 to ADUSDB)
M9 B-phase drive control pulse signal.
2-N-10
24VDC
24VDC
M9 DRIVE A
M9
M9 DRIVE A
M9 DRIVE B
M9 DRIVE B
ADUSDB
MS2 MS1
24VDC
PGND
DCPS2
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