Service manual

TRAY 1/2 PAPER FEED UNIT
2-J-8
2 UNIT EXPLANATION
[6] No Paper Detection Control
No paper in the tray is detected by PS26 (no paper 1)
and PS27 (no paper 2) which are controlled by the
PRCB (printer control board).
1. Operation
When the tray becomes empty, PS26 or PS27 is
turned ON, displaying a message on LCD via the
OB1 (operation board 1).
2. Signals
a. Input signals
(1) PS26 (PS26 to PRCB)
No paper detection signal (tray 1).
[L]: Paper does not exist in tray
[H]:Paper exists in tray
(2) PS27 (PS27 to PRCB)
No paper detection signal (tray 2).
[L]: Paper does not exist in tray
[H]:Paper exists in tray
5VDC
PS26
SGND
5VDC
PS27
SGND
5VDC
SGND
PRCB DCPS1
PS26
PS27
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