TRAY 1/2 (7155/7165), TRAY 3/4 (7255/7272) PAPER FEED UNIT
2-J-6
2 UNIT EXPLANATION
2. Signals
a. PRCB input signals
(1) T1UP_PS (PS2 to PRCB)
Paper upper limit detection signal (tray 1)
[L]: Not detected.
[H]:Detected.
(2) T1RM_PS (PS4 to PRCB)
Remaining paper detection signal (tray 1)
[L]: Not detected.
[H]:Detected.
(3) T2UP_PS (PS8 to PRCB)
Paper upper limit detection signal (tray 2)
[L]: Not detected.
[H]:Detected.
(4) T2RM_PS (PS10 to PRCB)
Remaining paper detection signal (tray 2)
[L]: Not detected.
[H]:Detected.
b. PRCB output signals
(1) T1RISEM_24V (PRCB to M16)
M16 ON/OFF control signal (tray 1)
(2) T2RISEM_24 (PRCB to M17)
M17 ON/OFF control signal (tray 2)
[5] Paper Size Detection Control
The paper size in tray 1/2 is detected using PS5/
6/11/12 (paper size/1-1/2-1/1-2/2-2), and VR1/2
(paper size/1/2). Based on the detection signals,
the PRCB (printer control board) judges the
paper size.
1. Operation
The length of paper is detected using PS5/6/11/
12 (paper size/1-1/2-1/1-2/2-2) . Variable resis-
tors (VR1/2) interlocked with the guide position
are installed at the bottom of the tray to detect the
width of paper.
The relationships between the sensors and
paper sizes (lengths) are as follows:
Paper size
Sensor
8.5 x 11
or less
A4R to
B5R
F4 or
larger
PS5/11 OFF ON ON
PS6/12 OFF OFF ON
VR1
PRCB
DCPS
5V2
S.GND
3.3V2
T1SIZE_VR
AGND
PS6
5V3
T1SIZE_L_PS
SGND
PS5
5V3
T1SIZE_S_PS
SGND
VR2
3.3V2
T2SIZE_VR
AGND
PS12
5V3
T2SIZE_L_PS
SGND
PS11
5V3
T2SIZE_S_PS
SGND
Tray 1
Tray 2
To Next Page
Loading...
Need help?
General
