Pioneer DVR-A03 Service Manual page 50

DVR-A03
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3 7 63 1515 0
6.2.5 Wobble SPDL Bias Adjustment
Objective
Correct the dispersion of spindle motor.
Symptom when out of
Recording performance becomes poor, and jitter value of self recording/playback becomes outside of standard
adjustment
specification.
Measurement Instru-
ment connections
[Procedure]
• Clamp the unrecorded 4.7GB DVD-R disc.
"PL" (PLAY)
"+99050000+FR" (Wobble SPDL adjustment command)
"2XN" (Set the CLV double speed)
"+99050000+FR" (Wobble SPDL adjustment command)
"RJ" (REJECT)
"RS" (RESET)
6.2.6 Playback Ability Confirmation
TE
L 13942296513
Symptom when out of
adjustment
Measurement Instru-
ment connections
Adjustment standard
value
[Procedure]
(1) DVD System
• Clamp the recorded DVD-R disc.
"5DT" (Selects 4.7R mode)
"1XN" (Set the CLV normal speed)
"PL" (PLAY)
Connect the jitter meter to TP125 (RF) and measure the jitter of both total-T edges. Confirm that jitter is less than 12%.
"RJ" (REJECT)
"RS" (RESET)
(2) CD System
• Clamp the recorded CD-R disc.
"1DT" (Selects CD-R mode)
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"4XN" (Set the CLV 4th speed)
"PL" (PLAY)
"+20000000+FR" (TOC information readout, etc.)
.
Connect the jitter meter to TP125 (RF) and measure the jitter of both total-T edges. Confirm that jitter is less than 12%.
"RJ" (REJECT)
"RS" (RESET)
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Confirm that the adjustment was done correctly.
Connect the total T-jitter meter to TP125
(RF) terminal.
jitter is less than 12%.
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8
Player state
Adjustment location
Disc
Q Q
3 6 7 1 3
Player state
Adjustment location
Disc
u163
.
2 9 9 4 2 8
PLAY
None
New 4.7GB DVD-R disc
1 5 0 5 8 2 9 9 4
PLAY
None
Recorded DVD-R disc
Recorded CD-R disc
m
co
9 9
2 8 9 9