LG GCC-4520B Service Manual page 65

D. Laser Inspection (CD Read power / Write power / DVD Read power)
1. Remove disc on the Tray.
========= Test CD Read Power ===========
2. Click "CD Read LD ON" button on menu.
3. Measure LD Power with LD Powermeter(Caution : wavelength = 780nm)
4. Verify whether the laser power is between 800µW and 1300µW.
========= Test CD Write Power ===========
5. Click "CD Write LD ON" button on menu.
6. Enter 30 at displayed dialog box.
7. Mesure LD Power with LD Powermeter(Caution : wavelength = 780nm)
8. Verify whether the laser power is between 28mW and 32mW.
========= Test DVD Read Power ===========
9. Click "DVD Read LD ON" button on menu.
10.Measure LD Power with LD Powermeter (Caution : wavelength = 650nm)
11.Verify whether the laser power is between 370µW and 430µW.
Dialog box of CD write power
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