2 - Q - 7
ADU PAPER FEED/CONVEYANCE SECTION
[4] Paper Feed/Reversal Control
PGND
24VDC
24VDC
78-6
78-1
78-3
5VDC
SGND
M151 DRIVE
M151 CLOCK
M151 LD
CL151 DRIVE
CL152 DRIVE
PS151
PS152
PS153
SGND
PS157
5VDC
57-B4
57-B6
83-A8
83-A9
83-A11
83-A4
83-A5
57-B3
57-A1
57-A2
57-B7
57-A3
57-B5
CB
DCPS
M151
550-1
550-2
550-3
PS151
CL151
CL152
555-1
555-2
555-3
PS152
556-1
556-2
556-3
PS153
560-1
560-2
560-3
PS157
The paper feed and reversal operations take place as a result
of the transmission of rotational force from M151 (ADU paper
feed) to the conveyance roller and the reversal roller by means
of CL151 (ADU paper feed) and CL152 (ADU reversal).
M151, CL151 and CL152 drive the CB (control board).
Related signals are PS151 (ADU no paper detection), PS152
(ADU paper feed),PS153 (ADU reversal detection) and
PS157(ADU gate).
1. Operation
a. Paper feed control
M151 goes ON in synchronism with M1 (main). When
PS152 detects the leading edge of the paper conveyed
from the ADU paper exit/conveyance section, CL151 goes
ON, causing the rotational force of M151 to be transmitted
to the conveyance roller. As a result, paper is fed to the
stacker from the bottom of the selector gate. CL151 goes
OFF after the specified time from when PS152 detects the
trailing edge of the paper.
For the second sheet of paper, CL151 goes ON again after
the specified time from when CL152 is turned OFF by the
passage of the 1st sheet. The same operation is repeated
for the subsequent sheets as well.
M151 goes OFF 80 ms after PS19 (optics sync) goes OFF
when the series of control operations in the ADU is com-
pleted.
M151 goes OFF after the end of a series of control
operations in the ADU.
b. Reversal control
When CL151 goes OFF, CL152 goes ON after the speci-
fied time, and the rotational force of M151 is transmitted to
the reversal roller. As a result, the paper in the ADU paper
feed section is reversed and conveyed, then exited to the
conveyance section. CL152 is turned OFF after the speci-
fied time from when PS153 goes OFF as a result of
detecting the trailing edge of the paper.
2. Signals
a. Input signals
(1) PS151 (PS151 → CB)
“No paper in stacker” detection signal
[H]: Paper in stacker
[L]: No paper in stacker
(2) PS152 (PS152 → CB)
“Paper at entrance of ADU paper feed/conveyance
section” detection signal.
This signal becomes [L] when paper is detected.
(3) PS153 (PS153 → CB)
“Paper at entrance of ADU paper feed section” detec-
tion signal.
This signal becomes [H] when paper is detected.
(4) PS157 (PS157 → CB)
“Paper jam at border section (paper exit side) of main
body and ADU” detection signal.
[H]: Paper in stacker
[L]: No paper in stacker
(5) M151 LD (PS151 → CB)
This signal becomes [L] when M151 reaches the
specified speed.
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