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TRAY 1/2 PAPER FEED UNIT
c.
Remaining Paper Detection Control
The level of paper remaining in each tray is
detected according to the time that M19 or M20
requires to lift up the paper up/down plate when
the tray is set. This lift-up time (operation time of
M19 or M20) is recorded in the PRCB. Subse-
quently, remaining paper is detected by the
paper feed counter. The detected remaining
paper level is displayed on the operation panel in
5 steps. PS34 and PS37 are used to detect the
remaining paper level when it lowers below about
10%.
d.
Tray lock control
When the tray handle is gripped, PS14 or PS15
is turned ON. This signal then causes SD5 or
SD6 to go ON, releasing the lock.
2. Signals
a.
PRCB input signals
(1) PS14 (PS14 to PRCB)
Tray drawer handle detection signal (tray 1).
[L]: Detected
[H]: Not detected
(2) PS15 (PS15 to PRCB)
Tray drawer handle detection signal (tray 2).
[L]: Detected
[H]: Not detected
(3) PS20 (PS20 to PRCB)
Paper upper limit detection signal (tray 1).
[L]: Not detected
[H]: Detected
(4) PS21 (PS21 to PRCB)
Paper upper limit detection signal (tray 2).
[L]: Not detected
[H]: Detected
(5) PS34 (PS34 to PRCB)
Remaining paper detection signal (tray 1).
[L]: Detected
[H]: Not detected
(6) PS37 (PS37 to PRCB)
Remaining paper detection signal (tray 2).
[L]: Detected
[H]: Not detected
b.
PRCB output signals
(1) M19 CONT (PRCB to M19)
M19 ON/OFF control signal (tray 1).
[L]: M19 ON
[H]: M19 OFF
(2) M20 CONT (PRCB to M20)
M20 ON/OFF control signal (tray 2).
[L]: M20 ON
[H]: M20 OFF
(3) SD5 CONT (PRCB to SD5)
SD5 drive control signal (tray 1).
[L]: SD5 ON
[H]: SD5 OFF
(4) SD6 CONT (PRCB to SD6)
SD6 drive control signal (tray 2).
[L]: SD6 ON
[H]: SD6 OFF
2-J-6
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