Misfeed At Tray 1 Feed Section - Konica Minolta bizhub C650 Service Manual

Field Service Ver. 8.0 Jun. 2008
15.3.2

Misfeed at tray 1 feed section

A. Detection timing
Type
Detection of • The leading edge of the paper does not turn ON the tray1 vertical transport
misfeed at tray 1
feed section
Detection of paper • The tray1 vertical transport sensor (PS4) is turned ON when the main power
left in tray 1 feed
section
Tray 1 feed • For paper fed from the tray1, due to a delay in paper arrival, loop forming in
section
loop registration
reversing jam
Tray 1 feed section • For paper fed from the tray1, the image write start signa permit continues to be
4
image write start
signal permit wait-
ing jam
B. Action
Take-up motor (M22)
Tray 1 paper feed clutch (CL1)
Tray1 vertical transport sensor (PS4)
Step
1 Initial check items
2 PS4 I/O check, sensor check
3 CL1 operation check
4 M22 operation check
5 Change PFTDB
6 Change PRCB
sensor (PS4) even after the lapse of a given period of time after the tray1 starts
to feed paper.
switch is turned ON, a door or cover is opened and closed, or a misfeed or mal-
function is reset.
front of the timing roller is not complete before the rise timing of the registration
motor.
disabled for a predetermined period of time after the timing of the image write
start signal output.
Relevant parts
Action
Description
Paper feed/transport drive board (PFTDB)
Printer control board (PRCB)
WIRING DIAGRAM
Control signal
—
PFTDB CN4PFTDB-8 (ON)
PFTDB CN4PFTDB-14 (ON)
PFTDB CN5PFTDB-5 to 8
—
—
15. Jam display
Location (Electri-
cal component)
—
P-5
P-5
P-3
—
—
585
4