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

6. Jam Display
6.3.2

Misfeed at Tray 3 to 5 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 feed section been energized.
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 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
34
Relevant Electrical Parts
Action
Field Service Ver. 1.0 May 2006
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
—
—
Location
(Electrical Com-
ponent)
—
V-22
V-22
C-3 to 4
Q-22
—
—