Misfeed At Tray 1 Feed Section - Konica Minolta bizhub C353 Service Manual

15. Jam display
15.3.3

Misfeed at tray 1 feed section

A. Detection timing
Type
Detection of
misfeed at tray 1
feed section
Detection of paper
left in tray 1 feed
section
Tray 1 feed
section
loop registration
reversing jam
Tray 1 feed section
2
image write start
signal permit wait-
ing jam
B. Action
Transport motor (M1)
Paper feed tray 1 paper feed clutch (CL1)
Paper feed tray 1 chain feed sensor (PS1)
Sensor in front of tim. roller (PS23)
Step
2
1 Initial check items
2 PS1 I/O check, sensor check
3 PS23 I/O check, sensor check
4 CL1 operation check
5 M1 operation check
6 Change PRCB
470
2
• The leading edge of the paper does not turn ON the sensor in front of tim. roller
(PS23) even after the lapse of a given period of time after the tray 1 starts to
feed paper.
• The paper feed tray 1 chain feed sensor (PS1) is turned ON when the main
power switch is turned ON, a door or cover is opened and closed, or a misfeed
or malfunction is reset.
• For paper fed from the tray 1, due to a delay in paper arrival, loop forming in
front of the timing roller is not complete before the rise timing of the transport
motor (M1).
• For paper fed from the tray1, the image write start signal permit continues to be
disabled for a predetermined period of time after the timing of the image write
start signal output.
Relevant parts
Action
Field Service Ver. 3.0 Jan. 2008
Description
Printer control board (PRCB)
WIRING DIAGRAM
Control signal
—
PRCB CN12-8 (ON)
PRCB CN1-3 (ON)
PRCB CN12-11 (ON)
PRCB CN34-10 (REM)
PRCB CN34-13 (LOCK)
—
Location (Electri-
cal component)
—
D-8
D-18
D-9
D-23
—