Brother HL-3450CN Series, Service Manual

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CHAPTER 1 PRODUCT OUTLINE
1-8
3. INTERNAL STRUCTURE
<Cross Sectional View >
K
Y
M
C
Fig. 1-3
No. Components Name Outline of Functions
1 Toner Cartridge
Contain the toner (K, Y, M, C) for developing.
Each toner cartridge (K, Y, M, C) is independent.
2 OPC Belt Cartridge Forms images and includes the OPC belt.
3 Drum Cleaner
Cleans and collects waste toner adhering to the transfer
drum.
4 Fusing Unit Fixes by heat and pressure the toner image onto the paper.
5 Transfer unit Transfers toner images from the transfer drum to the paper.
6 Transfer Drum
Forms color images, combining the toner images from the
OPC belt on the drum.
7 Paper Discharger
Emits a corona charge for separating the paper from the
transfer drum.
8 Transfer Roller Transfers the toner image on the transfer drum to the paper.
9 Media Cassette Feeds paper automatically.
10 Paper Pick-up Roller Feeds paper automatically from the media cassette.
11 Laser Unit
Generates a modulated laser beam and scans the OPC belt
to produce the image.
4. Fusing Unit
3. Drum Cleaner
2. OPC Belt Cartridge
1. Toner Cartridge
(K, Y, M, C)
5. Transfer Unit
7. Paper Discharger
8. Transfer Roller
6. Transfer Drum
10. Paper Pick-up
Roller
9. Media Cassette
11. Laser Unit