Olivetti d-color MF651, Service Manual, Page: 785 / 1053

Field Service Ver. 2.0 Jul. 2009 19. TROUBLE CODE
725
TROUBLESHOOTING
C2151 Secondary transfer roller
pressure welding alien-
ation
• The pressure welding alienation sensor
doesn’t turn OFF (retracting) even after the
lapse of a given period of time after the 2nd
image transfer pressure retraction motor
has started rotating during the 2nd image
transfer roller is retracting.
• The pressure welding alienation sensor
doesn’t turn ON (pressuring) even after the
lapse of a given period of time after the 2nd
image transfer pressure retraction motor
has started rotating during the 2nd image
transfer roller is pressuring.

B
C2152 Transfer belt pressure
welding alienation
• At the completion of transfer belt pressure/
retraction operations, the pressure welding
alienation sensor/K or the pressure welding
alienation sensor/color is not in the status
corresponding to each of the transfer belt
pressure/retraction operations. See the
table below.
• Even after a predetermined period of time
has elapsed since the transfer belt starts
pressure/retraction operation, the pressure
welding alienation sensor/K or the pressure
welding alienation sensor/color is not in the
status corresponding to each of the transfer
belt pressure/retraction operations. See the
table below.
 B
Code Item Detection timing
Trouble iso-
lation
Rank
Operation Position
Sensor status
(K: Color)
• Color and K
retraction o K
pressure
• Color and K
pressure
o
K
pressure
K
pressure
ON (not
blocked)
:OFF (blocked)
• Color and K
retraction o
Color and K
pressure
• K pressure
o
Color and K
pressure
Color
and K
pressure
ON (not
blocked):ON
(not blocked)
• K pressure
o
Color and K
retraction
• Color and K
pressure
o Color and K
retraction
Color
and K
retraction
OFF (blocked):
OFF (blocked)
Y110571-1 Service Manual