Xerox 495 manual Operation Outline, Information transfer cycle

OPERATION OUTLINE

Operation Outline

This section gives an outline of printing by this printer.

The printing operation consists of four cycles for every sheet. These are:

1.Information transfer cycle - the transfer of data from the Host computer to the Page buffer.

2.Recording cycle - the transfer of data from the page buffer to the Photoconductor drum. This cycle places toner on the electrostatic image in preparation for the transfer cycle.

3.Transfer cycle - transferring the image on the Photoconductor drum to the paper.

4.Fusing cycle - fusing the image on the paper.

The following illustration shows the areas where these cycles take place.

The numbers represent the cycles shown above.

4. Fuser A

3. Transfer Charger A

Cleaner Brush B4. Fuser B

Cleaner Blade B

Discharge LED B

Precharger B

Cleaner Brush A

Cleaner Blade A

Discharge LED A

Precharger A

2.Optical Unit A (LED Array)

1.Page Buffer Bit Map Memory

From Host

Computer

					Photo-
					conductor
					Drum A
Stacke	r
					Developer
			Photo-		Unit A
		conductor
		Drum B
		Develo		per
		Unit B			Tractor Assembly

		A - Front side printing
2. Optical Unit A	(LED Array)
		B - Back side printing

3. Transfer Charger B

Hopper

Information transfer cycle

The information transfer cycle follows the IPDS datastream.

One sheet of data for the front and back sides is transferred sequentially from the host computer to the page buffer in this printer.

Printing data transferred from the host computer is first stored in the intermediate buffer of the printer.

The data stored in the intermediate buffer is processed according to the

Page C-2 Xerox 495 Continuous Feed Duplex Printer Operator Guide