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1
DVD Error Rate Adjustment
2
A
Notes:
• Use disc: GGV1025
START
• Play the DVD test disc
at inner track
• Display ERROR RATE
on the monitor
ESC
CHP/TIM
B
C
1E-3
BER
5E-4
Anticlock wise
Rotation of Radial screw
and Tangential screw
C
D
Turn the POWER OFF in
case of NG once, and
perform the adjustment
once again.
If error rate is OK,
locks a root of
tangential and radial
adjustment screws with
the Screw tight.
Screw tight: GYL1001
E
Disc playback normally.
• The measurement of
block error rate
F
88
1
2
Traverse Mechanism
Assy-S
Adjust the radial adjustment
screw so that
ERROR RATE becomes
around "5E-4".
B
A
A
Best point
Clock wise
Player
CHECK
In this check, the error rate
OK
that is less than "5E-5"is
better.
ESC
CHP/TIM
2
3
A
ERROR RATE : "5E-4"
ERROR RATE: - - - -
Monitor
• Unfasten the tangential screw
by 90 degrees step till ERROR RATE
becomes around "1E-3" again .
• Record the number of rotation (N1).
ESC
• Fasten the tangential adjustment screw
Service mode end
XV-EV500
3
4
• Play the DVD test disc
at inner track
(around #30000)
Traverse Mechanism
Assy-S
Fasten the radial
adjustment screw so that
ERROR RATE becomes
around "1E-3".
ERROR RATE : "1E-3"
• Unfasten the radial adjustment screw
by 90 degrees step till ERROR RATE
becomes around "1E-3" again .
• Record the number of rotation (N1).
(memorizing how much the screw was rotated.)
• Fasten the radial adjustment screw
till the number of rotation becomes
harf of N1.
Best Radial point
ESC
Service mode end
• Play the DVD test disc
at outer track
(around #200000)
\ Service mode
ESC
Traverse Mechanism
Assy-S
Fasten the tangential
adjustment screw so that
ERROR RATE becomes
around "1E-3".
ERROR RATE : "1E-3"
till the number of rotation becomes
harf of N1.
Best tangential point
4
B
C
CHP/TIM
B
C
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