(No.YD002)1-25
4.4.7.2 Preparation for adjustment
(1) Remove the DVD unit.(Refer to the SECTION 3 Removing the major parts)
(2) Connect a extention cord between
CN502
of DVD servo control board assembly and
CN7301
of Main board assembly. (See
Fig.4-4a)
(3) Connect a extention cord between
CN501
of DVD servo control board assembly and
CN5302
of Regulator board assembly. (See
Fig.4-4a)
(4) Remove the DVD servo control board assembly attached the DVD unit.
(5) Three stud is attached in a DVD unit. (See Fig.4-4b)
NOTE:
The connector of an extended code (right or reverse) since direction of which is also connectable, be careful of the direction which a
relay wire inserts enough It will become the cause of failure if especially a Regulator board side is mistaken.
Fig.4-4a
Fig.4-4b
4.4.7.3 Adjustment
(1) Set the main body at test mode.
(2) Press the "SET UP MENU" key of the remote controller three times, and the FDP is displayed "CHECK".
(3) Insert a test disc (VT-501), and press the "PLAY" button of the front panel.
(4) After a few seconds, press the numeric key "6" of the remote controller. Then, the FDP is displays a jitter value.
(5) Turn the adjustment screws on the underside of the traverse mechanism with screw driver until the maximum jitter value is dis-
played on the FDP. (In this model, a bigger jitter value means a better result.)
NOTE:
• Reference values to judge whether the jitter is allowable or not are displayed, instead of actual jitter values.
• Please be sure to perform "all-initialization" and "optimization adjustment of front end parameter" after adjusting.
DVD unit
DVD servo
control board
assembly
CN502
CN501
CN7301
CN7302
Regulator board
assembly
Main board
assembly
Stud
****
1241
FDP (Example)
POINT:
Loading mechanism assembly
Traverse mechanism assembly
Remote controller "6" key-Jitter value
Screw
a
Screw
b
Screw
c
Turn the adjustment screws
a
and
b
to the same angle in the right direction.
And turn the adjustment screws
a
and
b
to the same angle in the left direction.
Then, turn the screws
a
and
b
in either
the right or the left direction to increase
the number of jitter.
Don't turn the adjustment screw
c
.
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3/7/2017
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