Dell 5110cn Color Laser Printer Service Manual - Page 520
Printing Process - color laser printer toner
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1. Printing Process 1.1 Summary of Printing Process Chapter 6 Principles of Operation This printer is a "Full-color laser printer" which applies the principal of an electrophotographic recording system. The tandem system comprising a drum and developing unit respectively for each color of yellow, magenta, cyan and black (Y, M, C and K) places toner image of each color on paper producing full-color prints finally through 3 intermediate transfer units (IDT 1: 2, IDT 2: 1). Printing processes of this printer is composed of the basic steps as follows. (1) Charging with electricity:Drum surface is charged with electricity. (2) Exposure Image unit is exposed to laser beams. (3) Development Image is developed with toner. (4) Primary transfer Toner image is transferred to the intermediate transfer unit (IDT 1). (5) Secondary transfer Toner image on the intermediate transfer unit (IDT 1) is transferred to the intermediate transfer unit (IDT 2). (6) Cleaning The intermediate transfer unit (IDT 1) is cleaned. (7) Tertiary transfer Four-color finished toner image on the intermediate transfer unit (IDT 2) is transferred onto the paper. (8) Cleaning Intermediate transfer unit (IDT 2) is cleaned. (9) Static elimination Electric charge of the paper is eliminated. (10) Fixing Toner on the paper is fixed by heat and pressure. (11) Cleaning Remaining toner on the drum and intermediate transfer units are collected. IMAGING DRUM Drum Y Charged (1) with electricity (2) Exposure Drum M Charged (1) with electricity (2) Exposure Drum C Charged (1) with electricity (2) Exposure Drum K Charged (1) with electricity (2) Exposure (3) Development (3) Development (3) Development (3) Development (4) Primary transfer (Drum → IDT1) (4) Primary transfer (Drum → IDT1) Intermediate transfer unit ( IDT1) (6) Cleaning ( IDT1) Intermediate transfer unit ( IDT1) (6) Cleaning ( IDT1) (5) Secondary transfer ( IDT1 → IDT2) Intermediate transfer unit ( IDT2) (8) Cleaning ( IDT2) (7) Tertiary transfer ( IDT2 → Paper) (11) Cleaning (general) Paper (9) Static elimination TRANSFER ROLLER (10) Fixing Ten06014KA 6 - 1