MDS-MX101 - Sony Audio Service Manual (repair manual). Page 15

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Note 1: Data will be erased during MO reading if a recorded

disc is used in this adjustment.

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

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

8. Press the

= 0 button or ) + button so that the

waveforms of the oscilloscope becomes the specified value.
(When the

= 0 button or ) + button is pressed,

the “

” of “EFB=

  MO-W” changes and the waveform

changes.)
In this adjustment, waveform varies at intervals of approx.
2%.  Adjust the waveform so that the specified value is satis-
fied as much as possible.
(MO write power traverse adjustment)

(Traverse Waveform)

9. 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-P” will be displayed.)

10. The optical pick-up moves to the pit area automatically and

servo is locked.

11. Press the

=  0 button or )  + button until the

waveforms 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.

1. Connect an oscilloscope to CN110 pin 3 (TEO) and CN110

pin 2 (VC) of the BD board.

2. Load a MO disc (any available on the market).  (Refer to note

1.)

3. Press the CHARACTER button or SCROLL button and

move the optical pick-up to outer circumference outside the
pit area.

4. Press the

= 0 button or ) + button 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. Press the

= 0 button or ) + button so that the

waveforms of the oscilloscope becomes the specified value.
(When the

= 0 button or ) + button is pressed,

the “

” of “EFB=

  MO-R” 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.
(MO read power traverse adjustment)

(Traverse Waveform)

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.)

(Traverse Waveform)

12. Press the  YES  button, and save the result of adjustment to the

non-volatile memory.
(“EFB=

  SAVE” will be displayed for a moment.  Then

“EFBAL CD” will be displayed.)
The disc stops rotating automatically.

13. Press the  

6  button and remove the MO disc.

14. Load the test disc TDYS-1.
15. Press the YES button and display “EFB=

 CD”.

Servo is imposed automatically.

16. Press the

=  0 button or )  + button until the

waveforms 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.

17. Press the  YES  button, and save the result of adjustment to the

non-volatile memory.
(“EFB=

  SAVE” will be displayed for a moment.  Then

“EFBAL ADJUST” will be displayed.)

18. Press the  

6  button and remove the test disc TDYS-1.

(Traverse Waveform)

Ω

3

2

3

2