TRAY 1/2 (7155/7165), TRAY 3/4 (7255/7272) PAPER FEED UNIT
2-J-7
2 UNIT EXPLANATION
2. Signals
a. PRCB input signals
(1) T1SIZE_S_PS (PS5 to PRCB)
Paper size detection signal (tray 1)
[L]: Paper does not exist.
[H]:Paper exists.
(2) T1SIZE_L_PS (PS6 to PRCB)
Paper size detection signal (tray 1)
[L]: Paper does not exist.
[H]:Paper exists.
(3) T2SIZE_L_PS (PS11 to PRCB)
Paper size detection signal (tray 2)
[L]: Paper does not exist.
[H]:Paper exists.
(4) T2SIZE_S_PS (PS12 to PRCB)
Paper size detection signal (tray 2)
[L]: Paper does not exist.
[H]:Paper exists.
(5) T1SIZE_VR (VR1 to PRCB)
Paper width detection signal (tray 1)
(6) T2SIZE_VR (VR2 to PRCB)
Paper width detection 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) which are con-
trolled 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.
PRCB
DCPS
5V2
S.GND
PS9
5V3
T2_0PS
SGND
PS3
5V3
T1_0PS
SGND
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