Olivetti d-color MF651, Service Manual, Page: 739 / 1053

Field Service Ver. 2.0 Jul. 2009 17. JAM DISPLAY
679
TROUBLESHOOTING
17.3 Solution
17.3.1 Initial check items
• When a paper misfeed occurs, first perform the following initial check items.
17.3.2 Misfeed at manual bypass feed section
Check item Action
Does paper meet product specifications? Replace paper.
Is the paper curled, wavy, or damp? Replace paper.
Is a foreign object present along the paper path, or
is the paper path deformed or worn?
Clean the paper path and replace if necessary.
Are rolls/rollers dirty, deformed, or worn? Clean or replace the defective roll/roller.
Are the edge guide and trailing edge stop at the cor-
rect position to accommodate the paper?
Set as necessary.
Are the actuators operating correctly? Correct or replace the defective actuator.
Relevant parts
Bypass paper feed motor (M27)
Tray 1 vertical transport sensor (PS4)
Bypass paper limit sensor (PS35)
Bypass paper lower sensor (PS36) Paper feed/transport drive board (PFTDB)
Printer control board (PRCB)
Step Action
WIRING DIAGRAM
Control signal
Location (Electri-
cal component)
1 Initial check items — —
2 PS4 I/O check, sensor check PFTDB CN11-8 (ON) Q-2
3 PS35 I/O check, sensor check PFTDB CN6<B>-10 (ON) Q-12
4 PS36 I/O check, sensor check PFTDB CN6<A>-11 (ON) Q-11
5 M27 operation check PFTDB CN6<B>-1~4 Q-11
6 Change PFTDB — —
7 Change PRCB — —
Y110571-1 Service Manual