DPS-7.3
ADJUSTMENT PROCEDURES-4
ADJUSTMENT OF DVD MECHANISM-4
Monitor
Mechanism Assy
Adjust the Tangential Adjustment Screw
so that jitter becomes minimum.
Use disc: GGV1025
DVD Jitter Adjustment
2
J4 : - - - -
Disc playback normally.
• The measurement of block error rate
If error rate is OK,
locks a root of
tangential and radial
adjustment screws with
the Screw tight, and
go to step
Screw tight : GYL1001
Turn the POWER OFF in
case of NG once, and
perform the adjustment
once again.
Confirm the error rate that is
displayed "
OK
"
(Example
ER (av): 2.5e - 5-*OK
)
Playback method of inner and outer address for the purpose is refererd to "5. TEST MODE".
Test mode
Play the DVD test disc at outer track
(around #200000)
Test mode
Play the DVD test disc at innerouter track
(around #30000)
Mechanism Assy
Adjust the Radial Adjustment Screw so that
jitter becomes minimum.
Test mode
Play the DVD test disc at outer track
(around #200000)
Mechanism Assy
Adjust the Tangential Adjustment Screw
so that jitter becomes minimum.
Test mode end
Check
J4 : Min
J4 : Min
J4 : Min
Tangential
adjustment
screw
Radial
adjustment
screw
Front side
J4 :
3
OK
NG
5
42/48
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