Pioneer XV-DV370 Service Manual page 47

1
A
DVD Error Rate Adjustment
2
Notes:
· Use disc: GGV1025
START
· Play the DVD test disc
at inner track
· Display ERROR RATE
on the monitor
B
ESC CHP/TIM
C
1E-3
ERROR
RATE
5E-4
C
Anticlock wise
Rotation of Radial screw
and Tangential screw
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
E the Screw tight.
Screw tight: GYL1001
Disc playback normally.
· The measurement of
block error rate
F
44
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 .
ESC
· Record the number of rotation (N1).
· Fasten the tangential adjustment screw
Service mode end
XV-DV363
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