Gestetner A294, Service Manual

Page: 590 / 600

DIFFERENCES FROM THE A294 I / A295 I MODELS
A294/A295 11-4 SM
1.6 FUSING UNIT
1. Web length increased
The length of the web [A] has been
increased from 10m to 20m. This new
20m web cannot be installed on the
A294/A295 models, as there have
been changes in the machine’s frame.
In addition, a stopper (Web Break
Pad) [B] made of rubber has been
added to the web unit shaft to ensure
that slack does not develop in the 20m
web while rolling (Web Break Pad is a
600K replacement part). Note that this
part is only for the 20m web. Also note
that the upgrade kit uses a 14m web.
2. Web drive modification
With the increased length of the web,
the number of gears has been
increased from 6 to 8 in order to
maintain the balance between motor
rotation (unchanged) and the amount
of web that is rolled/unrolled.
In addition, these gears allow the
machine to switch over to a fine-
precision drive control when the web is
full and when it has run out.
3. Web rolling/unrolling control
modification
•
SP1902-2 (Web Motor Drive Interval)
Interval
Destination PPM A294 I / A295 I A294 II / A295 II
85 42 sec 21 sec
US
105 34 sec 17 sec
85 42 sec 11 sec
Europe, Asia
105 34 sec 9 sec
•
SP1902-3 (Web Motor Drive Time)
A294 I / A295 I A294 II / A295 II
0.8 sec 2.8 sec
4. Pressure roller changed from a nonconductive to a conductive type.
Since the new toner is more sensitive to static electricity, which can lead to
black spots on copies, the pressure roller has been changed to one with a
conductive surface to ensure this does not occur. The new roller has a black
surface with visible wrinkles, however these wrinkles have no effect on image
quality.
A294D736.WMF
A294D733.WMF
[A]
[B]
CÓPIA NÃO CONTROLADA
CÓPIA NÃO CONTROLADA