48
DVR-A03
6.2.3 Radial Tilt Circuit Adjustment
To adjust the target value of tilt servo so that pickup and disc become to be level relatively.
Playback RF waveform is dirty (Playback jitter is defective).
Connect the total T-jitter meter to TP125
(RF) terminal.
Playback jitter is minimum.
PLAY, Tilt servo ON
Set the tilt error value with the command
input.
DVD-ROM(Dual)/ DVD-ROM(Single)/
Unrecorded DVD-RW/ Recorded CD-R
discs.
"3TL" (Initialize the tilt)
• Enters code "
4TL
" in the state that does not clamp a disc.
• Calmp the unrecorded DVD-RW disc and enters code "
5TL
".
• Calmp the DVD-ROM (Dual) disc and enters code "
6TL
".
• Calmp the DVD-ROM (Single) disc.
"3DT" (Selects DVD-ROM (Single) mode)
"1XN" (Set the CLV normal speed)
"+PL" (Search for address 100000h)
• Monitor the pin 54 (AGCOUT) of IC112 (RF63). ("RF" is marked on the test land of the DVD ATAPI MAIN Assy.)
• Connect the jitter meter to TP125 (RF), search for a point where the jitter of both total-T edges become minimum with
"1TL" (Tilt UP)
/
"2TL" (Tilt Down)
. At this time, turn the equalizer of jitter meter to OFF.
"7TL" (Obtain the TILT TARGET)
"RJ"
(REJECT)
• Clamp the recorded CD-R disc.
"1DT" (Selects CD-R mode)
"4XN" (Set the CLV 4th speed)
"+PL" (Search for 20 minutes)
"1TL" (Tilt UP)
/
. At this time, turn the equalizer of jitter meter to OFF.
"7TL" (Obtain the TILT TARGET)
"RJ"
Player state
Adjustment location
Disc
Objective
Symptom when out of
adjustment
Measurement Instru-
ment connections
Adjustment standard
value
[Procedure]
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