Tip & How-To about Epson EPL 5900L Laser Printer

Understanding how laser printer works

Printing technology on organic photoconductor drum (OPC Drum) is summarized by the following 6 steps:
STEP1:The OPC drum must be charged with a negative charge, (electrons)
the primery charge roller apply a hight voltage to the drum.Note:if this step missing, (poor contact in the high voltage) the page will be printed all black) the charge roller is located on the drum.



STEP2: The laser beam reach the drum surface to discharge the zone of text that will be printed on the paper. Note: if the laser beam don't reach the drum,( the interlock switch is not actuated when the front cover is closed) the image will not be formed on the drum. the laser unit is showing on this picture:




STEP3:the developping cylinder prepare the toner to be taken by the drum, the surface that was touched by the laser beam are positive, they attract the toner by electrostatic force, the other zone push the toner because they have the same charge (both negative, coulomb law). the image will be formed on the drum surface.the developping roller is located on the cartridge.


STEP4:the transfer roller attract the image formed on the drum surface to the paper.Note: if the high voltage not reach the transfer roller, the paper comes out blank (poor contact), or if the transfert roller is dirty the quality of printing is bad. these is the picture of the transfert roller and the paper pickup roller :







STEP5:the image was transfered to the paper, and must be fixed by temperature, and pressure. the fixing unit or fusing unit is composed of :the hot roller and a pressure roller.






STEP 6: the clean blade or cleaning roller remove the residuel toner on the drum surface, to prepare for a new print operation. Note :if the cleaning step was not performed the page comes out with the trace of the last print page.

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1020 drum laserjet


The OPC drum is contained inside the toner cartridge.. just buy a new toner cartridge! OPC stands for (Organic Photo Conductor) and its part of the toner cartridge.. Buy a new cartridge HP order number is Q2612X or aftermarket

Feb 04, 2014 | HP LaserJet 1020 Printer

1 Answer

what does opc belt do ?


OPC Belt (Organic Photo Conductor)
A photoconductor is a material that conducts electricity only when exposed to light. Photocopiers and laser printers have a large roller or belt coated with photoconductive material. As this drum turns it is electrically charged by a high voltage corona wire. The next step is to reflect an image using a laser beam or reflected light from mirrors onto the drum as it turns neutralizing the charge where light hits leaving a latent image or static charge in the shape of the image you want to copy.

The next step is to turn the roller past a brush made of toner (colored plastic particles). The static charge will pull the particles onto the charged area of the drum forming an image you can see, next feed a piece of paper onto this turning drum, as you do apply an opposite charge using a second high voltage wire (transfer corona) to the back side of the paper, causing the paper to stick to the toner/drum (opposite charges attract). Separate the paper from the drum using a high voltage alternating current (separation corona wire). Melt the toner into the paper with hot rollers. This will create a black and white image.

Jun 17, 2011 | Brother MFC-9420CN All-In-One Laser...

1 Answer

AL-1631 Repalced drum, but light is still on


If you will replaced the drum you should reset the drum counter .
To reset follow these steps:
Step1: Press continuously Clear key then press Exposure key then Clear key then Exposure key
Step2: You are inside the simulation if the display turns off but if not do again step1
Step 3: Press 24 then press print button then press 7 then press print button
If not canceled try step4
Step4: Do step1 to step2 then Press 24 then press print button then press 6 then press print button

Mar 03, 2009 | Sharp AL 1631 Copier

2 Answers

We have a Sharp 1641CS copier and the drum light came on a few weeks ago, we replaced it, and the light never turned off, now it blinks, and the will not copy at all? Help!


If you will replaced the drum you should reset the drum counter .
To reset follow these steps:
Step1: Press continuously Clear key then press Exposure key then Clear key then Exposure key
Step2: You are inside the simulation if the display turns off but if not do again step1
Step 3: Press 24 then press print button then press 7 then print button
If not canceled try step4
Step4: Do step1 to step2 then Press 24 then press print button then press 6 then print button

Mar 02, 2009 | Sharp AL-1641CS Copier

2 Answers

How to clean scratch on OPC Drum


you cannot take the scratches off the drum---sorry!

Sep 27, 2008 | Canon CLC 1120 Color Copier

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