Sony MINIDISC DECK MDS-S38 Service Manual Download

Page: 33 / 68

— 33 —

5-7. TRAVERSE ADJUSTMENT

Connection :

Oscilloscope

V : 0.5 V/div
H : 10 ms/div
Input : DC mode

BD board

CN110 pin

(TEO)

CN110 pin

(VC)

Adjusting method :
1. Connect an oscilloscope to CN110 pin

(TEO) and CN110

(VC) of the BD board.

2. Load a disc (any available on the market). (Refer to Note 1.)
3. Press the

button or

)

button and move the optical pick-

up outside the pit.

4. Rotate the AMS knob and display “EFBAL ADJUST”.
5. Press the YES button and display “EFB =

MO-R”.

(Laser power READ power/Focus servo ON/tracking servo OFF/
spindle (S) servo ON)

6. Rotate the AMS knob so that the waveform of the oscilloscope

becomes the specified value.
(When the AMS knob is rotated, the

of “EFB=

” changes

and the waveform changes.) In this adjustment, waveform var-
ies at intervals of approx. 2%. Adjust the waveform so that the
specified value is satisfied as much as possible.
(Read power traverse adjustment)

(Traverse Waveform)

Specification A = B

7. Press the YES button and save the result of adjustment to the

non-volatile memory (“EFB =

SAVE” will be displayed for a

moment. Then “EFB =

MO-W” will be displayed).

8. Rotate the AMS knob so that the waveform of the oscilloscope

becomes the specified value.
(When the AMS knob is rotated, the

of “EFB-

” changes

and the waveform changes.) In this adjustment, waveform var-
ies 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)

Specification A = B

9. Press the YES 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. Rotate the AMS knob 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)

Specification A = B

12. Press the YES button, and save the adjustment results in the

non-volatile memory. (“EFB =

SAVE” will be displayed for

a moment.)
Next “EFBAL CD” is displayed. The disc stops rotating auto-
matically.

13. Press the

button and remove the disc.

14. Load the check disc (MD) TDYS-1.
15. Press the YES button and display “EFB =

CD”. Servo is

imposed automatically.

16. Rotate the AMS knob 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)

Specification A = B

17. Press the YES button, display “EFB =

SAVE” for a moment

and save the adjustment results in the non-volatile memory.
Next “EFBAL ADJUST” will be displayed.

18. Press the

button and remove the check disc (MD) TDYS-1.

Note 1 : MO reading data will be erased during if a recorded disc is

used in this adjustment.

Note 2 : If the traverse waveform is not clear, connect the oscillo-

scope as shown in the following figure so that it can be
seen more clearly.

Oscilloscope