II-4
2. LASER
SYSTEM
Laser unit driver
Collimator lens
Cylindrical lens
Laser unit motor
Scanning mirror
Focusing lenses
Beam detect mirror
Reflective mirror
Photosensitive drum
Optical sensor
To external device
Main PCB
SBD
DATA VOFF
Figure 2.4
In response to the print signal transmitted from the external device, the main PCB
generates the drive signals (DATA,VOFF) for the laser diode and sends the signals to the
laser unit.
The laser diode in the laser unit generates a laser beam modulated by DATA.
The modulated laser beam is aligned into a parallel beam by a collimator lens and a
cylindrical lens and then brought to the scanning mirror which is rotating at a constant
speed.
The laser beam reflected by the scanning mirror focuses on the photosensitive drum via
the focusing lenses arranged in front of the scanning mirror.
The path of the beam coming through the focusing lenses is reflected by the reflective
mirror.
As the scanning mirror rotates at a constant speed, the laser beam scans the
photosensitive drum at a constant speed.
As the photosensitive drum rotates at a constant speed and the laser beam scans the
drum, an images is formed on the drum.
Summary of Contents for HL-2060
Page 1: ...MECHANICS ELECTRONICS SERVICE MANUAL LASER PRINTER ...
Page 41: ...III 8 A B F C D E 1 E 2 E 3 E 4 E 5 F Figure 3 7 Paper Feed Size SW PCB Circuit ...
Page 129: ...VII 16 Test for memory MEMORY DISPLAY MEMORY DEBUG MEMORY TEST exit MENU ...
Page 137: ...Appendix A 3 Main PCB Circuitry Diagram 1 7 CODE UK4058000 B512006 CIR 1 7 NAME A 3 ...
Page 138: ...Appendix A 4 Main PCB Circuitry Diagram 2 7 CODE UK4058000 B512006 CIR 2 7 NAME A 4 ...
Page 139: ...Appendix A 5 Main PCB Circuitry Diagram 3 7 CODE UK4058000 B512006 CIR 3 7 NAME A 5 ...
Page 140: ...Appendix A 6 Main PCB Circuitry Diagram 4 7 CODE UK4058000 B512006 CIR 4 7 NAME A 6 ...
Page 141: ...Appendix A 7 Main PCB Circuitry Diagram 5 7 CODE UK4058000 B512006 CIR 5 7 NAME A 7 ...
Page 142: ...Appendix A 8 Main PCB Circuitry Diagram 6 7 CODE UK4058000 B512006 CIR 6 7 NAME A 8 ...
Page 143: ...Appendix A 9 Main PCB Circuitry Diagram 7 7 CODE UK4058000 B512006 CIR 7 7 NAME A 9 ...
Page 144: ...Appendix A 10 Control Panel PCB Circuitry Diagram 1 1 CODE UK4077000 B512005 CIR NAME A 10 ...
Page 145: ...Appendix A 11 Laser LD PCB Circuitry Diagram 1 1 CODE UK3253000 B48K253 CIR NAME A 11 ...
Page 147: ...June 98 54T046NE0 HL2060 ...