Konica Minolta magicolor 4690MF Service Manual page 404

Field Service Ver. 1.0 May 2008
6.3.3 Misfeed at the document transport section
A. Detection timing
Type
Detection of mis-
The registration sensor (on REYB2) is not blocked even after the lapse of a prede-
feed at the docu-
termined period of time after the media feed sensor (on REYB1) has been
ment transport
unblocked.
section
Detection of paper The media feed sensor (on REYB1) is unblocked and the registration sensor (on
left at the document REYB2) is blocked when the power switch is turned ON, the cover is opened and
transport section closed, or a misfeed or malfunction is reset.
B. Action
Transport motor (M1)
Media feed sensor (on REYB1)
Registration sensor (on REYB2)
Step
1 Initial check items.
Check the DFCB connector for proper con-
2
nection and correct as necessary.
3 M1 operation check.
4 Media feed sensor sensor check.
5 Registration sensor sensor check.
6 Change DFCB.
Relevant electrical parts
Action
Description
DF control board (DFCB)
WIRING DIAGRAM
Control signal
—
—
DFCB PA7-1 to 4
DFCB PA3-1 (ON)
DFCB PA1-2 (ON)
—
6. Jam display
Location (Electrical
component)
—
—
G-3
B-4
B-3
—
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