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80 MFP unit explanation ENWW
(remaining paper/1/2) are used to detect
the remaining paper level when it lowers
below about 10 percent.
2 Signals
a PRCB input signals
1 TIUP_PS (PS2 to PRCB)
Paper upper limit detection signal
(Tray 2)
[L]: Not detected
[H]: Detected
2 TIRM_PS (PS4 to PRCB)
Remaining paper detection signal
(Tray 2)
[L]: Not detected
[H]: Detected
3 TIUP_PS (PS8 to PRCB)
Paper upper limit detection signal
(Tray 3)
[L]: Not detected
[H]: Detected
4 TIRM_PS (PS10 to PRCB)
Remaining paper detection signal
(Tray 3)
[L]: Not detected
[H]: Detected
b PRCB output signals
1 T1RISEM_24V (PRCB to M16)
M16 ON/OFF control signal (Tray 2)
2 T2RISEM_24 (PRCB to M17)
M17 ON/OFF control signal (Tray 3)
Paper size detection control
The paper size in Tray 2/3 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 resistors (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 by 11
or less
A4R to
B5R
F4 or
larger
PS5/11 OFF ON ON
PS6/12 OFF OFF ON