Paper Size Detection Control - Konica Minolta 7085/FORCE 85 Service Manual

BY-PASS TRAY
2. Signals
3
a. Input signals
(1) PS23 (PS23 to PRCB)
Paper upper limit position detection signal (by-
pass tray).
[L]: Detected
[H]: Not detected
(2) PS43 (PS43 to PRCB)
Paper lower limit position detection signal (by-
pass tray).
[L]: Detected
[H]: Not detected
(3) M22 FEM (DCDB to PRCB: 7075 only)
Signal indicating whether M22's 24 V fuse is
blown (by-pass tray).
[L]: Not detected
[H]: Detected
b. Output signal
(1) M22 TR1-4 (PRCB to DCDB: 7075 only)
M22 drive control signal.
(2) M22 DRIVE 1, 2 (DCDB to M22: 7075)
M22 drive control signal.
MODEL
7075/7085
SERVICE HANDBOOK
(PRCB to M22: 7085)
MANUAL REVISED EDITION

[5] Paper Size Detection Control

PRCB
The size of paper in the by-pass tray is detected by
PS55 (paper size 1 (by-pass tray)), PS56 (paper size
2 (by-pass tray)), and VR4 (paper size detection (by-
pass tray)). Based on the detection signals, the PRCB
(printer control board) judges the paper size.
1. Operation
The length of paper is detected using PS55 and
PS56. The by-pass tray is provided with a vari-
able resistor (VR4) interlocked with the guide
position to judge the width of paper according to
the change in the resistance value.
2. Signals
a. Input signals
(1) PS55 (PS55 to PRCB)
Paper size detection switch ON/OFF signal.
(2) PS56 (PS56 to PRCB)
Paper size detection switch ON/OFF signal.
(3) VR4 (VR4 to PRCB)
Paper width detection signal.
DATE
2 - L - 4
Jan. 2002
3
5VDC
PS55
PS55
SGND
PS56
PS56
VR4
VR4
5VDC
SGND
DCPS1
PAGE METHOD
2-L-4 REPLACEMENT