Konica Minolta bizhub C353 Service Manual page 840

Field Service Ver. 2.0 Jan. 2008
7.3.3 Tray4 feed section/vertical transport section misfeed (PC-204)
A. Detection timing
Type
The leading edge of the paper does not block the tray4 vertical transport sensor
(PS126) even after the set period of time has elapsed after the tray4 paper feed
Tray4 feed section/
motor (M123) is energized.
vertical transport
section misfeed
The tray3 vertical transport sensor (PS117) is not blocked even after the lapse of
detection
a given period of time after the tray4 vertical transport sensor (PS126) has been
blocked by a paper.
Tray 4 vertical Rise timing of load for registration is earlier than the one for making the loop at
transport section front of the timing roller at tray 4 paper feed.
loop registration
reversing jam
The tray4 vertical transport sensor (PS126) is blocked when the main power
switch is set to ON, a door or cover is opened and closed, or a misfeed or mal-
function is reset.
Tray4 detection of
paper remaining
The tray4 paper feed sensor (PS125) 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.
Misfeed detected The tray4 vertical transport sensor (PS126) is not unblocked even after the lapse
as a result of of a given period of time after PS126 has been blocked by a paper.
delayed deactiva-
tion of sensor
Tray4 feed section
For paper fed from the tray4, image write start signal permit continues to be dis-
image write start
abled for a predetermined period of time after the timing of image write start sig-
1
signal permit wait-
nal output.
ing jam
B. Action
Tray4 paper feed sensor (PS125)
Tray4 vertical transport sensor (PS126)
Tray3 vertical transport sensor (PS117)
Tray4 paper feed motor (M123)
Sensor in front of tim. roller (PS23)
1
Step
1 Initial check items
2 PS23 I/O check, sensor check
3 PS125 I/O check, sensor check
4 PS126 I/O check, sensor check
5 PS117 I/O check, sensor check
6 M123 operation check
7 PCCB replacement
Relevant electrical parts
Action
Description
PC control board (PCCB)
WIRING DIAGRAM
Control signal
—
PRCB CN1-3 (ON)
PCCB PJ10-8 (ON)
PCCB PJ11-2 (ON)
PCCB PJ6-11 (ON)
PCCB PJ9-1 to 4
—
7. Jam display
Location
(Electrical
components)
—
bizhub C353/C253/
C203 D-18
PC-204 G-5
PC-204 G-5
PC-104, PC-204 B-2
PC-204 G-6
—
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