Konica Minolta magicolor 7450, Руководство по обслуживанию

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Field Service Ver. 1.0 May 2006 13. Jam Display
185
magicolor 7450
T
roubleshooting
13.4.8 Misfeed at Tray 3 to 5 paper feed, Tray 3 to 5 vertical transport section
A. Detection Timing
B. Action
Type Description
Detection of
misfeed at Tray 3 to
5 paper feed
section
The leading edge of the paper does not block the Vertical Transport Sensor (PC8)
even after the lapse of a given period of time after the Paper Feed Motor (M1) has
been energized.
Detection of
misfeed at Tray 3 to
5 vertical transport
section
The Registration Roller Sensor (PC1) is not blocked even after the lapse of a
given period of time after the paper has blocked the Vertical Transport Sensor
(PC8).
Vertical Transport Sensor (PC8) does not transmit the paper even after the lapse
of a given period of time after the paper has blocked PC8.
Tray 3 to 5 Vertical
Transport section
Loop Registration
Reversing JAM Rise timing of load for registration is earlier than the one for making the loop at
front of the Registration Roller at Tray 3 to 5 feed.
Detection of paper
left in Tray 3 to 5
Vertical Transport Sensor (PC8) is blocked when the Main Power Switch is turned
ON, a door or cover is opened and closed, or a misfeed or malfunction is reset.
Paper Take-Up Sensor (PC9) is blocked when the Main Power Switch is turned
ON, a door or cover is opened and closed, or a misfeed or malfunction is reset.
Relevant Electrical Parts
Paper Take-Up Sensor (PC9)
Vertical Transport Sensor (PC8)
Registration Roller Sensor (PC1)
Paper Feed Motor (M1) Control Board (PWB-Z)
Mechanical Control Board (PWB-M)
Step Action
WIRING DIAGRAM
Control Signal
Location (Electri-
cal Component)
1 Initial check items — —
2 PC9 I/O check, Sensor check PWB-Z PC PJ6Z PC-8 (ON) V-22
3 PC8 I/O check, Sensor check PWB-Z PC PJ6Z PC-11 (ON) V-22
4 PC1 I/O check, Sensor check PWB-M CNSEN-3 (ON) C-3 to 4
5 M1 operation check PWB-Z PC PJ5Z PC-1 to 4 Q-22
6 Change PWB-Z — —
7 Change PWB-M — —