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Laser Printing Process

Once a laser printer receives the print information from the PC (or sometimes from a file server), it goes through a certain process in order to print:

1. Cleaning
2. Conditioning
3. Writing
4. Developing
5. Transferring
6. Fusing

This process is important to learn and understand as there is guaranteed to be a question regarding this information on the exam:

1. Cleaning – the EP drum is cleaned with a rubber blade.

2. Conditioning – the EP drum is given a negative charge of about -600 Volts by the primary corona wire.

3. Writing – a laser beam writes to the EP Drum. This laser causes portions of the drum to become almost positively charged.

4. Developing – toner is applied to the drum by the particles being transferred to the areas of positive charge.

5. Transferring - the Transfer Corona wire charges the paper with a positive charge, the EP drum turns the paper as it runs beneath.

6. Fusing – the paper runs through the Fusing Assembly which is heated to 350 degrees F. The toner is fused onto the paper.

 

This printing process will be in one or more questions on the exam. Memorize it!