Lct Paper Feed Section/Vertical Transport Section Misfeed - Konica Minolta bizhub C353 Service Manual

7. Jam display
7.3.2

LCT paper feed section/vertical transport section misfeed

A. Detection timing
Type
LCT paper feed
section misfeed
detection
LCT vertical
transport section
misfeed detection
LCT vertical
transport section
loop registration
reversing jam
LCT detection of
paper remaining
Misfeed detected
as a result of
delayed deactiva-
tion of sensor
LCT feed section
image write start
2
signal permit wait-
ing jam
B. Action
Paper feed sensor (PS1)
Vertical transport sensor (PS2)
Paper feed tray 2 vertical transport sensor (PS16)
Paper feed motor (M1)
Sensor in front of tim. roller (PS23)
2
Step
1 Initial check items
2 PS23 I/O check, sensor check
3 PS1 I/O check, sensor check
4 PS2 I/O check, sensor check
5 PS16 I/O check, sensor check
6 M1 operation check
7 PCCB replacement
8 MFPB replacement
32
2
The leading edge of the paper does not block the paper feed sensor (PS1) or the
vertical transport sensor (PS2) even after the set period of time has elapsed after
the paper feed motor (M1) is energized.
The paper feed tray 2 vertical transport sensor (PS16) is not blocked even after
the lapse of a given period of time after the vertical transport sensor (PS2) has
been blocked by a paper.
Rise timing of load for registration is earlier than the one for making the loop at
front of the timing roller at LCT paper feed.
The vertical transport sensor (PS2) is blocked when the main power switch is set
to ON, a door or cover is opened and closed, or a misfeed or malfunction is reset.
The paper feed sensor (PS1) is blocked when the main power switch is set to ON,
a door or cover is opened and closed, or a misfeed or malfunction is reset.
The paper feed sensor (PS1) is not unblocked even after the lapse of a given
period of time after PS1 has been blocked by a paper.
The vertical transport sensor (PS2) is not unblocked even after the lapse of a
given period of time after PS2 has been blocked by a paper.
For paper fed from the LCT, image write start signal permit continues to be dis-
abled for a predetermined period of time after the timing of image write start sig-
nal output.
Relevant electrical parts
Action
Field Service Ver. 3.0 Jan. 2008
Description
PC control board (PCCB)
MFP board (MFPB)
WIRING DIAGRAM
Control signal
—
PRCB CN1-3 (ON)
PCCB PJ5-2 (ON)
PCCB PJ5-5 (ON)
PCCB CN9-11 (ON)
PCCB PJ6-1 to 4
—
—
Location
(Electrical
components)
—
bizhub C353/C253/
C203 D-18
PC-405 F-9
PC-405 F-9
bizhub C353/C253/
C203 D-10
PC-405 F-10
—
—