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3-6-2 RF SUM Level Adjustment Method
◆ Connect an Oscilloscope to the RF SUM LEVEL Test Point.
◆ Play a Normal DVD disc and set the Oscilloscope Range as follows :
(Voltage ; 50mV/Div., Frequency ; 10m Sec.)
◆ Adjust the RF Sum Level by turning the Semi-Variable Resistor (VR1) on the Main PCB (See Fig. 3-12).
◆ Adjust according the to table on the previous pages :
✓ 1.7V +/- 0.2V
Warning
: Do not turn the Voltage up too high, as this may damage the Laser Diode permanently.
1.7V +/- 0.2V
Fig. 3-11 RF SUM Level Wavefrom
Fig. 3-12 Location of VR1 (Main PCB - Top View)
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