Sony DVP-NS300 Training Manual page 25

Circuit descriptions & troubleshooting
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Verifying Focus Layer Jumping:
This check is only possible in service mode. A dual layer disc
must be inserted.
1. Switch ON the "Drive Manual Operation" (2).
2. Next switch to "Disc Type" (1). Now check the inserted disc
Type, select "Disc Type Auto Check" (1). The detected disc
type is shown on th bottom of the screen; it should be "DVD
DL 12 cm".
3. Push "RETURN" and select "Servo Control" (2).
4. Start disc PB by switching the following ON: "LD ON" (1), "SP
ON" (2), "Focus ON" (3), "TRK ON" (4), "Sled ON" (5) and
"CLVA ON" (6).
5. Push "RETURN" once again and select "Track/Layer Jump" (3).
6. On the right side of the screen (Figure 5-5) you will see the information for controlling layer jumping. Use the
UP & Down buttons of the remote controller as follows:
L1 to L0 push once the "UP" button.
L0 to L1 push once the "DOWN" button.
The layer jump will be performed. After jumping, PB will continue on the other layer as indicated by the advancing
sector / frame numbers .
Figure 5-6 shows the track jump to the upper layer. The top waveform is PI and the bottom waveform shows FE.
The focus layer jump was from L0 to L1. The player is in service mode with a DVD „DL disc". Figure 5-7 shows
the track jump back to the lower layer. The top waveform is PI and the bottom waveform shows FE. The focus
layer jump was from L1 to L0. The player is in service mode with a DVD „DL disc".
FIGURE 5-6 - ELECTRICAL VERIFICATION
OF JUMP TO THE UPPER DISC LAYER
PI
FE
23
FIGURE 5-5 - TRACK / LAYER JUMP
SCREEN
FIGURE 5-7 - ELECTRICAL VERIFICA-
TION OF JUMP TO THE LOWER DISC
5. Testing
PI
FE

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