Misfeed At Manual Bypass Feed Section - Konica Minolta bizhub C353 Service Manual

15. Jam display
15.3.5

Misfeed at manual bypass feed section

A. Detection timing
Type
Detection of
misfeed at manual
bypass feed section
Manual bypass
feed section
loop registration
reversing jam
Manual bypass
2
feed section
image write start
signal permit wait-
ing jam
B. Action
Transport motor (M1)
Manual paper feed clutch (CL4)
Sensor in front of tim. roller (PS23)
Step
2
1 Initial check items
2 PS23 I/O check, sensor check
3 CL4 operation check
4 M1 operation check
5 Change PRCB
472
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 manual bypass
tray starts to feed paper.
• For paper fed from the manual bypass, loop forming has not been complete
before a sheet enters the timing roller because the rise timing of load to perform
registration is earlier than the rise timing of load to form a loop.
• For paper fed from the manual bypass, the image write start signal permit con-
tinues 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 CN1-3 (ON)
PRCB CN6-2 (ON)
PRCB CN34-10 (REM)
PRCB CN34-13 (LOCK)
—
Location (Electri-
cal component)
—
D-18
D-1
D-23
—