Misfeed At Tray 3 To 5 Paper Feed, Tray 3 To 5 Vertical Transport Section - Konica Minolta magicolor 7450 Service Manual

Field Service Ver. 1.0 May 2006
13.4.8

Misfeed at Tray 3 to 5 paper feed, Tray 3 to 5 vertical transport section

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