Internal Structure - Brother HL-3450CN Service Manual

CHAPTER 1 PRODUCT OUTLINE
3.

INTERNAL STRUCTURE

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