Operation; Web Solenoid Control - Konica Minolta BIZHUB 750 Service Manual

Theory of Operation Ver1.0 Aug.2005

21.3 Operation

21.3.1

Web solenoid control

A. Cleaning web mechanism
Turning ON and OFF the web solenoid (SD2) [1] rotates in the ratchet mechanism section [2]. The drive force
thus generated is transmitted to the cleaning web wind-up shaft [3] through the gear to wind up the cleaning
web. The cleaning web contains silicone oil and the pressure roller [4] allows it to come into contact with the fus-
ing roller /Up to clean the roller surface. The feed per revolution of the cleaning web is about 0.04 to 0.05 mm/
print.
[1] Web solenoid (SD2)
[2] Ratchet mechanism
[3] Cleaning web wind-up shaft
B. Operation timing
The web solenoid (SD2) turns ON and OFF based on the turning ON of the fusing exit sensor (PS30) when the
paper passes through it. However, in order to make the wind-up amount of the cleaning web per print at a fixed
rate, the number of prints is changed, which operates according to the print count value by cleaning web parts
that are required to be replaced. The following shows the count value of the cleaning web and the number of
operations of the SD2.
Count value of the cleaning web
1 to 350,000
350,000 or more *
* Be sure to replace the cleaning web at the number of 250,000 prints. The performance of the cleaning web
is not necessarily guaranteed up to 350,000 prints.
[5]
[4]
[3]
Operates according to the prescribed table values.
Stops.
[1]
[2]
[4] Pressure roller
[5] Cleaning web unwinding shaft
Number of operations of SD2
21. FUSING SECTION
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