Mita PointSource Ai 5555 - 1000 Tray Paper Feed;No Paper Detection Control

2 - M - 5
LCT-1000 TRAY PAPER FEED/CONVEYANCE SECTION
DCPS
78-2
88-5
88-3
24VDC
40VDC
PGND
CL3 DRIVE
CL1 DRIVE
SD141 DRIVE
SGND
PS141
5VDC
PS144
PS210
5VDC
M140 CONT
M140 PLL
SGND
M140 CLOCK
120-B9
120-B10
120-B11
83-B1
83-B4
83-B5
83-B8
83-B9
120-A1
120-A2
120-A3
120-A4
120-A5
CB
M140
723-1
723-2
723-3
PS141
CL1
CL3
SD141
727-1
727-2
727-3
PS144
726-1
726-2
726-3
PS210
[4] 1000 Tray Paper Feed/No Paper
Detection Control
The 1st paper feed from the 1000 tray takes place as a result
of the transmission of the rotational force of M140 (LCT paper
feed) by means of CL1 (LCT 1st paper feed (1000)). The paper
feed roller does not touch the paper at this time, so SD141 (LCT
1st paper feed (1000)) swivels, bringing the paper feed roller
into contact with the paper.
The fed paper is conveyed to the paper feed unit by drive force
from M140 which is transmitted to the conveyance roller via
CL3 (LCT conveyance).
M140, CL1, CL3 and SD141 are driven by the CB (control
board). Related signals are PS141 (LCT no paper detection
(1000)), PS144 (LCT conveyance (1000)), and PS210 (LCT
pre-feed (1000)).
1. Operation
a. 1st paper feed operation timing
(1) Start of paper feed for 1st copy
Timing determined by the P counter from when the
charging corona unit goes ON
(2) Start of paper feed for 2nd copy
After the specified period from when PS14 (registra-
tion) goes ON during the 1st copy operation.
(3) OFF timing
Specified count on the P counter
b. No paper detection control
When there is no more copy paper in the LCT1000 tray,
PS141 goes ON, and a message is displayed on the
indicating board via OB1 (operation board 1).
2. Signals
a. Input signals
(1) PS141 (PS141 → CB)
No paper detection signal from the 1000 tray
[H]: No paper in tray
[L]: Paper in tray
(2) PS144 (PS144 → CB)
Paper passage detection signal from the 1000 tray
conveyance section.
This signal is [L] while paper is passing through the
1000 tray conveyance section.
(3) PS210 (PS210 → CB)
1st paper feed detection signal from the 1000 tray.
This signal becomes [L] when paper is detected.
b. Output signals
(1) M140 CONT (CB → M140)
M140 ON/OFF control signal
[H]: M140 OFF
[L]: M140 ON
(2) M140 PLL (CB → M140)
PLL control clock signal for M140
(3) M140 CLOCK (CB→ M140)
(4) CL1 DRIVE (CB → CL1)
ON/OFF drive signal for CL1
[H]: CL1 OFF
[L]: CL1 ON
(5) CL3 DRIVE (CB → CL3)
ON/OFF drive signal for CL3
[H]: CL3 OFF
[L]: CL3 ON
(6) SD141 DRIVE (CB → SD141)
ON/OFF drive signal for SD141
[H]: SD141 OFF
[L]: SD141 ON