HP Compaq Presario,Presario 7479 Reference Manual page 88

11-8 Government Approvals
The CD drive is classified as a Class 1 laser product. This label is located on the
outside of the CD drive:
Figure A-1. Laser Label
Laser Type
Wavelength
Divergence Angle
Output Power
Polarization
Numerical Aperture
WARNING: Only authorized technicians trained by Compaq should attempt to repair
this equipment. All troubleshooting and repair procedures are detailed to allow only
subassembly/module-level repair. Because of the complexity of the individual boards
and subassemblies, no one should attempt to make repairs at the component level
or to make modifications to any printed wiring board. Improper repairs can create a
safety hazard.
Laser Label Information
Semiconductor GaAIAs
650-780 +/- 35 nm
53.5 Degree +/- 5 Degree
Less than 0.2 mW or 10.869 W/m 2 sr
Circular
0.45 +/- 0.04