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◆ Remove the DECK and remove the FFC Cable (Deck to Main PCB FFC cable), and replace it with an 35-P

extension cable (at least 30cm long).
Place the Deck on a flat horizontal position.

◆ Open the LD solderland short. (See Fig. 3-10).

◆ Connect an Oscilloscope to the Envelope Waveform Test Point (See Ttable 3-6).

◆ Connect Power, Open the Tray and Play the TDV-533 Disc, Chapter 14. 

◆ Adjust the Screws “A” and “B” (See Fig. 3-6) using a Hex screwdirvier until you obtain a Flat Waveform and 

the picture is stable.
Then, go to Chapter 1 and make sure the Waveform is Flat here as well.
If not, you have to go back to Chapter 16 and adjust again. 
If you cannot obtain a Flat waveform, then the unit is defective.      

: The Deck must be in a horizontal position.

Use both “A” and “B” screws to adjust, but mostly “A”.

Typical Waveform before Adjustment

Waveform after Correct Adjustment

Fig. 3-9 Envelope Waveform

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SOLDER LAND 2 POINTS SHORT

Fig. 3-10

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◆ 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

: Do not turn the Voltage up too high, as this may damage the Laser Diode permanently.

Fig. 3-11 RF SUM Level Wavefrom

Fig. 3-12 Location of VR1 (Main PCB - Top View)

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2003G0500-1

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