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[6] ADU Paper Feed/Reversal Control
The paper fed from the paper reverse and eject section
is fed to the ADU by M5 (paper reverse/exit). In the
ADU, paper is reversed by transmitting the drive force
of M7 (ADU reverse) to the paper reverse roller. M5 and
M7 are controlled by the PRCB (printer control board)
via the ADUSDB (ADU stand drive board).
Related signals are PS58 (ADU paper reverse), PS59
(ADU deceleration), and PS60 (ADU pre-registration).
When the front right or left door of this machine opens
or closes, MS1 (interlock 1) or MS2 (interlock 2) oper-
ates to interrupt the DC power supply to the motors,
stopping M5 and M7.
1. Operation
a.
ADU paper feed control
The paper fed from the paper reverse and exit
section by the drive force of M5 is then fed to the
ADU paper reversal section.
24VDC
24VDC
M5 DRIVE A
M5
M5 DRIVE A
M5 DRIVE B
M5 DRIVE B
PRCB
ADUSDB
5VDC
SGND
DCPS1
2-N-13
24VDC
24VDC
M7 DRIVE A
M7 DRIVE A
M7 DRIVE B
M7 DRIVE B
5VDC
PS58
PS58
SGND
5VDC
PS59
PS59
SGND
5VDC
PS60
PS60
SGND
MS2
MS1
24VDC
24VDC
PGND
DCPS2
b.
ADU paper reversal control
When paper is fed to the ADU reversal section,
M7 turns ON to feed paper continuously. When
the trailing edge of paper passes through PS58,
M7 starts rotating in the opposite direction, thus
feeding paper to the ADU paper conveyance
unit.
M7
ADU
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