Misfeed At Vertical Transport Section - Konica Minolta bizhub C650 Service Manual

Field Service Ver. 8.0 Jun. 2008
15.3.8

Misfeed at vertical transport section

A. Detection timing
Type
• The tray 1 vertical transport sensor (PS4) is not turned ON even after the lapse
• The timing roller sensor (PS38) is not unblocked even after the lapse of a given
• The OHP detection sensor (PS40) is not turned ON even after the lapse of a
Detection of
misfeed at vertical
transport section
• The tray 1 vertical transport sensor (PS4) is not turned OFF even after the
• The tray2 vertical transport sensor (PS12) is not turned OFF even after the
• The intermediate roller sensor (PS28) is not blocked even after the lapse of a
Vertical transport • For paper fed from the tray 1/2/3/4 or LU-301, loop forming has not been com-
section loop
registration
reversing jam
B. Action
Tray 1 vertical transport motor (M5)
Tray 2 vertical transport motor (M7)
Vertical transport motor (M26)
Tray 1 vertical transport sensor (PS4)
Tray 2 vertical transport sensor (PS12)
Intermediate roller sensor (PS28)
Timing roller sensor (PS38)
OHP detection sensor (PS40)
Step
1 Initial check items
2 PS4 I/O check, sensor check
3 PS12 I/O check, sensor check
4 PS28 I/O check, sensor check
5 PS38 I/O check, sensor check
6 PS40 I/O check, sensor check
7 M5 operation check
8 M7 operation check
9 Change PFTDB
10 Change PRCB
of a given period of time after the paper has turned ON the tray2 vertical trans-
port sensor (PS12).
period of time after the paper has turned ON the tray 1 vertical transport sensor
(PS4).
given period of time after the paper has turned ON the tray 1 vertical transport
sensor (PS4).
lapse of a given period of time after the paper has turned ON the PS4.
lapse of a given period of time after the paper has turned ON the PS12.
given period of time after the paper has unblocked the PS12.
plete before a sheet enters the timing roller because the rise timing of load to
perform registration is earlier than the rise timing of load to form a loop.
Relevant parts
Action
Description
Paper feed/transport drive board (PFTDB)
Printer control board (PRCB)
WIRING DIAGRAM
Control signal
—
PFTDB CN4PFTDB-8 (ON)
PFTDB CN8BPFTDB-2 (ON)
PFTDB CN11BPFTDB-18 (ON)
PRCB CN36PRCB-6 (ON)
PRCB CN36PRCB-2 (ON)
PFTDB CN5PFTDB-1 to 4
PFTDB CN5PFTDB-9 to 12
—
—
15. Jam display
Location (Electri-
cal component)
—
P-5
P-6
V-11
K-4
K-4 to 5
P-3
P-4
—
—
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