Gestetner A294, Service Manual

Page: 155 / 600

FUSING
SM 2-105 A294/A295
D
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2.10.5 OIL SUPPLY AND CLEANING
The oil supply and cleaning web [A] feeds
the web felt soaked with silicone oil. The
roller [B] contacting the web felt also
contacts the hot roller because of pressure
from springs [C]. It applies a light coat of
silicone oil to the hot roller and removes
paper dust from the hot roller. A spring
clutch inside the mechanism pulls the web
to take up the slack, to prevent it getting
pulled in between the fusing rollers.
Every 42 s (A294) or 34 s (A295) during
printing, the oil supply/cleaning web motor
turns for 0.8 s to move the oil supply and
cleaning web felt. This 42 or 34 second
interval starts when the first copy reaches
the fusing exit sensor, and ends 2 s after
the last copy has passed this sensor. SP1-
902-2 & 3 adjust the motor rotation interval
and rotation time.
SP1-902-1 displays the web consumption.
When the web consumption exceeds the
value set with SP1-902-4 (web near-end),
the machine indicates web near-end on
the operation display. The machine still
works until the oil supply/cleaning web end
sensor [D] detects when the feeler [E]
drops from the web. At this time, SC550 is
indicated in the operation panel display. In
this condition, a technician must install a
new oil supply and cleaning web, and
return SP1-902-1 to 0. Then, the SC will
be cleared.
Adjust SP1-902-4 (web near-end) to
change the near-end period. The default is
100%. With this setting, about 300 k
copies can be made before the near-end
message is displayed. After that, another
40 k can be made until the web ends. If
this SP is changed to 80%, about 240 k
copies can be made before the near-end
message is displayed. After that, another
100 k can be made until the web ends.
These figures assume that 80% of the
user’s output is A4 sideways.
A294D553.WMF
A294D504.WMF
A294D555.WMF
[B] [C]
[C]
[A]
[D]
[B] [C]
[E]
[D]
Rev. 6/2000
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CÓPIA NÃO CONTROLADA