Service manual

ADU
2-N-15
2 UNIT EXPLANATION
[7] ADU Paper Conveyance/Feed Control
The paper fed from the ADU paper reversal section is
fed to the paper conveyance rollers by transmitting the
drive force of M8 (ADU conveyance) to the paper con-
veyance rollers. Paper is then fed to the second paper
feed section by the drive force of M12 (registration).
Related signals are PS9 (ADU paper conveyance),
PS10 (ADU handle release), PS13 (ADU no paper),
PS46 (ADU exit), PS59 (ADU deceleration), and PS60
(ADU pre-registration). SD1 (ADU lock) is provided to
lock the handle of the ADU.
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 M8 and M12.
1. Operation
a. ADU conveyance control
Paper is fed at the high linear velocity until PS59
is turned ON at detection of the paper edge.
b. ADU feed control
When the leading edge of the paper conveyed at
high speed by ADU conveyance turns PS59 ON,
the M8 linear velocity is reduced to low speed
and the paper is conveyed at low speed by M12
after a specified interval. Then when the leading
edge of the paper turns PS60 ON, MC1 is turned
OFF when MC2 (ADU pre-registration) is turned
ON once more, and conveys at low speed after
loop forming time has elapsed.
c. M8 (ADU conveyance) control
(1) On timing
When M8 is turned on at start of copying.
(2) OFF timing
When PS58 is turned OFF at passage of the last
paper.
PRCB
DCPS1
DCPS2
ADUSDB
M8
SD1
MC2
PS9
PS59
PS60
PS10
PS13
PS46
MS2 MS1
24VDC
M12 CONT
M12 CLK
M12 EM
PGND
5VDC
PS59
SGND
PS60
24VDC
24VDC
M8 DRIVE A
M8 DRIVE A
M8 DRIVE B
M8 DRIVE B
24VDC
SD1 CONT
M12
24VDC
24VDC
PGND
5VDC
SGND
24VDC
MC2 CONT
5VDC
PS9
SGND
PS10
PS13
PS46
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