Misfeed At 2Nd Image Transfer Section - Konica Minolta bizhub C353 Service Manual

Field Service Ver. 4.0 Jun. 2008
15.3.8

Misfeed at 2nd image transfer section

A. Detection timing
Type
• A sheet of paper does not turn OFF the sensor in front of tim. roller (PS23) after
Detection of
misfeed at 2nd
image transfer • A sheet of paper does not turned ON the paper exit sensor (PS25) after a pre-
section
Detection of paper • The sensor in front of tim. roller (PS23) is turned ON when the main power
left in 2nd image
transfer section
2nd image transfer • For paper fed from the tray, loop forming has not been complete before a sheet
section loop
registration
reversing jam
B. Action
Transport motor (M1)
Fusing motor (M5)
Tim. roller clutch (CL6)
Sensor in front of tim. roller (PS23)
Paper exit sensor (PS25)
Step
2
1 Initial check items
2 PS23 I/O check, sensor check
3 PS25 I/O check, sensor check
4 CL6 operation check
5 M1 operation check
6 M5 operation check
7 Change PRCB
a predetermined period of time has elapsed since the sheet has turned ON the
PS23.
determined period of time has elapsed since the sheet has turned ON the sen-
sor in front of tim. roller (PS23).
switch is turned ON, a door or cover is opened and closed, or a misfeed or mal-
function is reset.
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.
Relevant parts
Action
Description
Printer control board (PRCB)
WIRING DIAGRAM
Control signal
—
PRCB CN1-3 (ON)
—
PRCB CN1-5 (ON)
PRCB CN34-10 (REM)
PRCB CN34-13 (LOCK)
PRCB CN34-2 (REM)
PRCB CN34-5 (LOCK)
—
15. Jam display
Location (Electri-
cal component)
—
D-18
—
D-17
D-23
D-23
—
475
2