Pioneer DVR-A03 Service Manual page 49

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6.2.4 Focus Position Adjustment
Objective
Symptom when out of
adjustment
Measurement Instru-
ment connections
Adjustment standard
value
[Procedure]
• Clamp the DVD-ROM (Single) disc.
"3DT" (Selects DVD-ROM (Single) mode)
"#+99070000+FR "
Note: Issue the CD-ROM disc only.
"1XN"
"+100000+PL"
"0MS"
"0AS"
• Connect the jitter meter to TP125 (RF) and adjust
TE
L 13942296513
and focus position will be changed. (Value to input into ∗∗∗∗ performs coarse adjustment with 0400h step and fine adjustment with
0100h step.)
"FE"
"RJ"
"RS"
• Perform the Focus Position Adjustment as same step as in the recorded DVD-R and DVD-RW discs.
[DVD-ROM (Dual) Adjustment]
Adjust the layer 0 and layer 1 of DVD-ROM (Dual) disc together.
[Focus Position Adjustment of layer 0]
"4DT"
"1XN"
"+100000+PL"
"0MS"
"0AS"
"EE"
[Focus Position Adjustment of layer 1]
"2FC"
"0MS"
"0AS"
"EE"
CD System Adjustment
Boot the CD system disc.
"+99070000+FR"
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Note: Issue the disc only.
"4XN"
"PL"
"+20000000+FR"
.
"+200000+PL"
• Perform the Focus Position Adjustment as same step in the recorded CD-R and CD-RW discs.
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To optimize the playback characteristic of the RF signal.
Playback RF waveform is dirty (Playback jitter is defective).
REC/PLAY RF waveform is dirty (REC/PLAY jitter is defective).
Connect the total T-jitter meter to TP125
(RF) terminal.
Playback jitter is minimum.
(ACT sensitivity adjustment)
(Set the CLV normal speed)
(Search for address 100000h)
"+∗∗∗∗+DW"
(Store the adjustment value in the nonvolatile memory)
(REJECT)
(RESET)
(DVD-ROM Dual mode)
(Set the CLV normal speed)
(Search for address 100000h)
(Store the adjustment value in the nonvolatile memory)
(Focus Jump UP (layer 0 to layer 1) )
(Store the adjustment value in the nonvolatile memory)
(ACT sensitivity adjustment)
(Set the CLV 4th speed)
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y
(PLAY)
(TOC information readout, etc.)
i
(Search for 20 minutes)
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2 9
8
Player state
Adjustment location
Disc
command so that the jitter of the both total-T edges become minimum,
Q Q
3 6 7 1 3 1 5
co
.
DVR-A03
9 4 2 8
PLAY, tilt servo ON
Set the DAC value with the command input.
DVD-ROM (Single)/ DVD-ROM (Dual)/
Recorded CD-R/ New DVD-RW discs.
0 5 8 2 9 9 4 2 8
m
9 9
9 9
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