Misfeed At Tray 4 Feed Section - Konica Minolta bizhub C650 Service Manual

15. Jam display
15.3.5

Misfeed at tray 4 feed section

A. Detection timing
Type
Detection of
misfeed at tray 4
feed section
Detection of paper
left in tray 4
Tray 4 feed section
4
image write start
signal permit wait-
ing jam
B. Action
Transport motor (M25)
Tray 4 paper feed clutch (CL7)
Tray 4 paper feed sensor (PS26)
Step
1 Initial check items
2 PS26 I/O check, sensor check
3 CL7 operation check
4 M25 operation check
5 Change PFTDB
6 Change PRCB
588
4
• The leading edge of the paper does not unblock the tray4 paper feed sensor
(PS26) even after the lapse of a given period of time after the tray 4 starts to
feed paper.
• Tray 4 paper feed sensor (PS26) is unblocked when the main power switch is
turned ON, a door or cover is opened and closed, or a misfeed or malfunction is
reset.
• For paper fed from the tray4, the image write start signal permit continues to be
disabled for a predetermined period of time after the timing of the image write
start signal output.
Relevant parts
Action
Field Service Ver. 8.0 Jun. 2008
Description
Paper feed/transport drive board (PFTDB)
Printer control board (PRCB)
WIRING DIAGRAM
Control signal
—
PFTDB CN9PFTDB-3 (ON)
PFTDB CN24PFTDB-2 (ON)
PFTDB CN12PFTDB-6 (LOCK)
—
—
Location (Electri-
cal component)
—
V-8
V-7
V-12
—
—