TRAY 1/2 PAPER FEED UNIT (7255/7272)
2-J-15
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) T1UP_PS (PS8 to PRCB)
Paper upper limit detection signal (tray 2)
[L]: Not detected.
[H]:Detected.
(4) T1RM_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)
[6] No Paper Detection Control
No paper in the tray is detected by PS3 (no paper
/1) and PS9 (no paper /2), and which is controlled
by the PRCB (printer control board).
1. Operation
When the tray becomes empty, PS3/9 (no paper/
1/2) is turned OFF, displaying a message on the
LCD via OB1 (operation board/1).
2. Signals
a. PRCB input signals
(1) T1_0PS (PS3 to PRCB)
No paper detection signal (tray 1)
[L]: Paper does not exist in tray.
[H]:Paper exists in tray.
(2) T2_0PS (PS9 to PRCB)
No paper detection signal (tray 2)
[L]: Paper does not exist in tray.
[H]:Paper exists in tray.
7272ma2010
PRCB
DCPS
5V2
S.GND
PS9
5V3
T2_0PS
SGND
PS3
5V3
T1_0PS
SGND
MODEL MANUAL REVISED EDITION DATE PAGE METHOD
SERVICE MANUAL Dec. 2003
7155/7165/7255/7272
2-J-15 ADDITION
4
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