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Phaser 6121MFP Service Manual
2-55
Theory of Operation
ADF Pick Operation
1. The media feed sensor detects media loaded in the document feeder.
2. The document stopper establishes the leading edge position of the document.
The stopper is lowered in the standby state and raised when the document is
taken up and fed in.
3. The document stopper is raised and lowered in synchronism with the raising
and lowering motion of the pick-up roller.
4. The pick-up roller and media feed roller turn to take up and feed the original
properly.
5. The pick-up roller transports the original up to the media feed roller.
6. The ADF Transport Motor drives the pick-up roller and media feed roller
through a gear train.
Double feeding of paper is prevented using coefficient of friction between the feed
roller and separator pad.
Single sheet feeding
The coefficient of friction on the front side of the paper fed
between the media feed roller and separator pad is equal to that on the backside
of the paper. This allows the media feed roller to transport the paper.
Multiple sheet feeding
The coefficient of friction between the paper and
separator pad is greater than that between sheets of paper. This ensures that only
the first sheet of paper is transported by the media feed roller.
s6121mfp-225
s6121mfp-112
Paper Feed Roller
Separator Pad
Summary of Contents for PHASER 6121MFP
Page 1: ...Phaser 6121MFP Multi Function Printer Phaser 6121MFP Service Manual...
Page 2: ......
Page 12: ...x Phaser 6121MFP Service Manual Contents...
Page 22: ...xx Phaser 6121MFP Service Manual...
Page 42: ...1 20 Phaser 6121MFP Service Manual General Information...
Page 106: ...2 64 Phaser 6121MFP Service Manual Theory of Operation...
Page 109: ...Phaser 6121MFP Service Manual 3 3 Error Messages and Codes s6121mfp 372...
Page 194: ...3 88 Phaser 6121MFP Service Manual Error Messages and Codes...
Page 306: ...6 44 Phaser 6121MFP Service Manual Adjustments and Calibrations...
Page 405: ...Phaser 6121MFP Service Manual 8 85 Service Parts Disassembly 3 Remove the spring s6121mfp 255...
Page 432: ...8 112 Phaser 6121MFP Service Manual Service Parts Disassembly...
Page 437: ...Phaser 6121MFP Service Manual 9 5 Parts List...
Page 477: ...Phaser 6121MFP Service Manual 9 45 Parts List...
Page 488: ...9 56 Phaser 6121MFP Service Manual Parts List...
Page 489: ...10 Chapter Wiring In this chapter Plug Jack Designations and Locator Diagrams Wiring Diagrams...
Page 530: ...1 6 Phaser 6121MFP Service Manual Index...
Page 531: ......