First Paper Feed Control - Konica Minolta 7085/FORCE 85 Service Manual

BY-PASS TRAY
Paper up/down plate
*3 Paper size detection
The paper size is automatically detected by the
following three sensors:
• Lateral: Paper size detection VR (VR4)
• Longitudinal: Paper size PS 1/2 (PS55/PS56)
Paper size PS1 (PS55)
By-pass
Paper size
tray
detection
VR(VR4)
MODEL
7075/7085
SERVICE HANDBOOK
Up/down motor
(by-pass) (M22)
Paper size
PS2 (PS56)
MANUAL REVISED EDITION

[3] First Paper Feed Control

3
24VDC
SD11 CONT
24VDC
24VDC
M6 DRIVE A
M6 DRIVE A
M6 DRIVE B
M6 DRIVE B
SD11 CONT
24VDC
M6 F/R
M6 CLK
M6 RES
M6 OFF
M6 VREF
M6 24FEM
PRCB
The 1st paper feed from the by-pass tray takes place
as the result of the transmission of the drive force from
M6 (loop roller) to the paper feed roller. SD11 (pick
up (by-pass tray)) moves up and releases the paper
feed roller contacting to the paper after the roller picked
up and fed the first paper to the feed roller side to
facilitate paper feeding.
The above operations are controlled by the PRCB
(printer control board).
1. Operation
a. First paper feed operation timing
Controlled at M6 ON/OFF timings and by M6 ro-
tation direction.
2. Signals
3
a. Input signals
(1) M6 24FEM (DCDB to PRCB: 7075 only)
Signal indicating whether M6's 24 V fuse is blown.
[L]: Not detected
[H]: Detected
b. Output signals
(1) M6 CLK (PRCB to DCDB: 7075 only)
M6 clock signal
(2) M6 RES (PRCB to DCDB: 7075 only)
M6 reset signal.
(3) M6 OFF (PRCB to DCDB: 7075 only)
M6 deenergizing signal (L: Deenergized)
DATE
2 - L - 2
Jan. 2002
3
SD11
M6
For 7085
MS2 MS1
24VDC 24VDC
PGND PGND
DCPS2
24VDC
SD11
SD11 CONT
24VDC
24VDC
M6 DRIVE A
M6
M6 DRIVE A
M6 DRIVE B
M6 DRIVE B
DCDB
For 7075
PAGE METHOD
2-L-2 REPLACEMENT