Phaser 4500/4510 Service Manual 2-3
Theory of Operation
10. Two-sided printing reverses the direction of the exit rollers to route the
paper through the duplex unit rollers and back to the registration roller. A
sensor in the duplex unit detects the presence of paper.
Block Diagram of the Print Cycle
The block diagram of the print cycle shows the sequence of events for the
xerographic process (dashed lines) and the paper flow (solid lines) into and
out of the printer.
Components Associated with the Xerographic Process
This cut-away side view of the printer shows the location of individual
components within the printer, and the major components that are directly
related to the print cycle and to the paper path.
s4500-007
1
Charge
2
Exposure
3
Development
4
Paper
Transport
5
Transfer
Paper Enters
6
Discharge
7
Fusing
Paper Exit
8
Cleaning
Two-sided
Printing
10
9
Xerographic Cycle
Cycle Repeats for the Next Print
Fuser Assembly
Print Cartridge
Paper
ransport
Laser Beam
Magnetic Roller
Charge Metering Blade
Cleaning
Blade
Detack Saw
Paper
Drum
BCR
Pressure
Roller
Heat Roller
s4500-008
Transfer Roller
1. Charging
3. Development
5. Transfer
6. Discharge
7. Fusing
2. Exposure
8. Cleaning