Konica Minolta bizhub C658 Service Manual page 1966

bizhub C658/C558/C458/C368/C308/C258
3.2.2 Document registration loop formation process
1. The registration sensor detects the leading edge of the original.
2. The registration roller remains stationary.
3. Because the document feed roller (document switchback exit roller for the 2nd side of the original) continues rotating to feed the original, a
loop is formed at the leading edge of the original.
4. The loop corrects skew in the original.
5. The registration roller is started to rotate to transport the original.
[6]
[4]
[5]
[8]
[7]
[1] Original
[3] Document feed roller
[5] Document registration sensor (PS3)
[7] Registration roller
[9] Document switchback exit roller
3.3 Document reading section
3.3.1 Transport mechanism
• The original transported from the document feed section will be transported to the document reading section by the registration roller, the
document reading roller/1 and /2, and the document switchback exit roller.
• The registration roller is driven by the registration motor.
• The document reading roller/1 and /2 are driven by the document reading motor.
[3]
[4]
[1] Registration motor (M3)
[3] Registration roller
[5] Document reading roller/2
3.3.2 Document reading glass cleaning mechanism
(1) DF original glass cleaning
• A reading line can occur if the DF original glass is contaminated with dust or dirt. The DF original glass cleaning mechanism prevents this
fault from occurring.
• A half face of the document reading glass cleaning roller is provided with the document reading glass cleaning brush. While the original is
being read, the document reading glass cleaning brush faces up. When the DF original glass is to be cleaned, the document reading
glass cleaning roller rotates, so that the document reading glass cleaning brush faces the DF original glass.
• The document reading glass cleaning brush is drive by the glass cleaning motor.
• The position of the cleaning brush is controlled by the document reading glass cleaning sensor.
[3]
[2]
[9]
[2]
[1]
[5]
PB THEORY OF OPERATION DF-629 > 3. OPERATION
[1]
[2] Document separation roller
[4] Loop formation (1st side)
[6] Registration roll
[8] Loop formation (2nd side)
- -
[2] Document reading motor (M1)
[4] Document reading roller/1
- -
PB-9