MD-101A
C P L AY M O D E
C - P L AY M I D
C 1 = X X X X A D = X X
C P L AY M O D E
F B I A S A D J U S T
X X X X / # # a = $ $
X X X X / # # b = $ $
X X X X / # # c = $ $
X X - X X - X X ( & & )
F B I A S A D J U S T
A
C
B
200
7
MULTI JOG
MULTI JOG
ADJUSTMENT PROCEDURES-9
Adjustment the focus bias
[Preparation]
(1) Loading the continuation recording disk to the unit.
[Adjustment]
(1) Turns the JOG knob and select the
C P L AY M O D E .
(2) Press the
JOG
knob.
(3) Press the
EDIT/NO
button .
(4) Turns the
JOG
knob, and select the
EBIAS ADJUST
mode.
(4) Press the JOG button .
(5) Turn clockwise the
JOG
knob,
adjust so that
C1 error rate becomes 200
.
C1 error rate is not stabilized.
Therefore, read average value.
C1 error rate
The value of the focus bias
in point A.
The value of the focus bias
in point
B
.
The value of the focus bias
in point
C
.
C1 error rate
C1 error rate
ADER
(6) Press the
JOG
knob.
(7) Turn counterclockwise the
JOG
knob,
adjust so that
C1 error rate becomes 200.
C1 error rate is not stabilized.
Therefore, read average value.
(8) Press the
JOG
knob.
(9) Checks the following contents.
Check that C1 error rate is value
less than 50.
Check that
ADER
is
00
.
(10) Press the
JOG
knob.
(11) Check the value of
&&
.
Rework from
(1)
, when
&&
is
less than 20.
Progresses to the next step
(12)
,
more than 19
(12) Press the
JOG
knob.
(13) Press the
STOP
button .
(14) Take out disk from the unit by pressing
the
EJECT
button.
[Explanation]
The relation between C1 error rate and focus bias is as follows.
In the structure to which the focus bias of point
C
is automatically set by adjusting the focus bias of point
A
and point
B
.
Focus bias
C1 error rate
When an error rate is worse than the standard value, perform this work.