16. Jam display Field Service Ver. 1.0 Jun. 2008
282
Troubleshooting
16.3.4 Misfeed at 2nd image transfer section
A. Detection timing
B. Action
Type Description
Detection of
misfeed at 2nd
image transfer
section
• A sheet of paper does not turn OFF the sensor in front of tim. roller (PS1) after
a predetermined period of time has elapsed since the sheet has turned ON the
PS1.
• A sheet of paper does not turned ON the paper exit sensor (PS2) after a prede-
termined period of time has elapsed since the sheet has turned ON the sensor
in front of tim. roller (PS1).
Detection of paper
left in 2nd image
transfer section
• The sensor in front of tim. roller (PS1) is turned ON when the main power
switch is turned ON, a door or cover is opened and closed, or a misfeed or mal-
function is reset.
2nd image transfer
section loop
registration
reversing jam
• For paper fed from the tray, 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.
Relevant parts
Transport motor (M1)
Fusing motor (M2)
Tim. roller clutch (CL1)
Sensor in front of tim. roller (PS1)
Paper exit sensor (PS2)
Printer control board (PRCB)
Step Action
WIRING DIAGRAM
Control signal
Location (Electri-
cal component)
1 Initial check items — —
2 PS1 I/O check, sensor check PRCB CN1-3 (ON) C to D-19
3 PS2 I/O check, sensor check — —
4 CL1 operation check PRCB CN1-5 (ON) C to D-18
5 M1 operation check
PRCB CN27-14 (REM)
PRCB CN28-2 (LOCK)
C to D-23
6 M2 operation check
PRCB CN27-4 (REM)
PRCB CN27-7 (LOCK)
C to D-22
7 Change PRCB — —
d-Color MF201
Service Manual Y109660-1
d-Color MF201
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