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HCD-PX333
8. Press the
.
“R”
or
>
“R”
button so that the waveform of
the oscilloscope becomes the specified value.
(When the
.
“R”
or
>
“R”
button is pressed, the
of
“EFB=
” changes and the waveform changes) In this
adjustment, waveform varies at intervals of approx. 2%. Adjust
the waveform so that the specified value is satisfied as much as
possible.
(Write power traverse adjustment)
Traverse Waveform
9. Press the
ENTER/YES “R”
button, and save the adjustment
results in the non-volatile memory. (“EFB =
SAVE” will be
displayed for a moment)
10. “EFB =
MO-P” will be displayed.
The optical pick-up moves to the pit area automatically and
servo is imposed.
11. Press the
.
“R”
or
>
“R”
button until the waveform of
the oscilloscope moves closer to the specified value.
In this adjustment, waveform varies at intervals of approx. 2%.
Adjust the waveform so that the specified value is satisfied as
much as possible.
Traverse Waveform
12. Press the
ENTER/YES “R”
button, and save the adjustment
results in the non-volatile memory. (“EFB =
SAVE” will be
displayed for a moment)
Next “EF MO ADJUST” (C07) is displayed. The disc stops
rotating automatically.
13. Press the
Z
(MD) button and take out the disc.
14. Load the check disc (TDYS-1).
15. Press the
.
“R”
or
>
“R”
button to display “EF CD
ADJUST” (C08).
16. Press the
ENTER/YES “R”
button to display “EFB =
CD”.
Servo is imposed automatically.
17. Press the
.
“R”
or
>
“R”
button so that the waveform of
the oscilloscope moves closer to the specified value.
In this adjustment, waveform varies at intervals of approx. 2%.
Adjust the waveform so that the specified value is satisfied as
much as possible.
Traverse Waveform
18. Press the
ENTER/YES “R”
button, display “EFB =
SAVE”
for a moment and save the adjustment results in the non-volatile
memory.
Next “EF CD ADJUST” (C08) will be displayed.
19. Press the
Z
(MD) button and take out the check disc.
Adjustment Location:
BD (MD) board (see page 47)
13.FOCUS BIAS ADJUSTMENT
Procedure:
1. Load the continuously-recorded disc. (Refer to “5. USING
THE CONTINUOUSLY RECORDED DISC” (See page 40))
2. Press the
.
“R”
or
>
“R”
button to display “CPLAY2
MODE” (C36).
3. Press the
ENTER/YES “R”
button to display “CPLAY2MID”.
4. Press the
MENU/NO “R”
button when “C =
AD =
)” is
displayed.
5. Press the
.
“R”
or
>
“R”
button to display “FBIAS
ADJUST” (C09).
6. Press the
ENTER/YES “R”
button to display “
/
a =
”.
The first four digits indicate the C1 error rate, the two digits
after “/ ” indicate ADER, and the 2 digits after “a =” indicate
the focus bias value.
7. Press the
>
“R”
button and find the focus bias value at which
the C1 error rate becomes about 200 (refer to Note 2).
8. Press the
ENTER/YES “R”
button to display “
/
b =
”.
9. Press the
.
“R”
button and find the focus bias value at which
the C1 error rate becomes about 200.
10. Press the
ENTER/YES “R”
button to display “
/
c =
”.
11. Check that the C1 error rate is below 20 and ADER is 00. Then
press the
ENTER/YES “R”
button.
12. If the “(
)” in “
-
-
(
)” is above 20, press the
ENTER/
YES “R”
button.
If below 20, press the
MENU/NO “R”
button and repeat the
adjustment from step 2.
13. Press thet
Z
(MD) button and take out the disc.
Note 1:
The relation between the C1 error and focus bias is as shown in
the following figure. Find points A and B in the following figure
using the above adjustment. The focal point position C is auto-
matically calculated from points A and B.
Note 2:
As the C1 error rate changes, perform the adjustment using the
average vale.
A
B
VC
Specification A = B
A
B
VC
Specification A = B
A
B
VC
Specification A = B
C1 error
about
200
B
C
A
Focus bias value
Содержание HCD-PX333
Страница 49: ...49 HCD PX333 Checking Location IC171 IC101 TP VC TP FE TP TE TP RF BD CD BOARD Conductor Side ...
Страница 50: ...50 HCD PX333 MEMO ...
Страница 63: ...63 63 HCD PX333 6 10 SCHEMATIC DIAGRAM MD DIGITAL SECTION 2 3 IC B D See page 79 for IC Block Diagrams ...
Страница 64: ...64 64 HCD PX333 6 11 SCHEMATIC DIAGRAM MD DIGITAL SECTION 3 3 IC B D IC B D See page 79 for IC Block Diagrams ...
Страница 66: ...66 66 HCD PX333 6 13 SCHEMATIC DIAGRAM MAIN BOARD 1 2 See page 80 for IC Block Diagrams IC B D IC B D ...
Страница 69: ...69 69 HCD PX333 6 17 SCHEMATIC DIAGRAM AMP BOARD ...
Страница 70: ...70 70 HCD PX333 6 18 SCHEMATIC DIAGRAM SP BOARD ...
Страница 72: ...72 72 HCD PX333 6 20 SCHEMATIC DIAGRAM PANEL SECTION1 ...
Страница 75: ...75 75 HCD PX333 6 24 SCHEMATIC DIAGRAM POWER BOARD ...
Страница 111: ...111 HCD PX333 MEMO ...