DHC-MD5, HCD-MD5 - Sony Audio Service Manual (repair manual). Page 22

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Data will be erased during MO reading if a recorded
disc is used in this adjustment.

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.

11. Turning the MULTI JOG dial until the waveforms of the oscil-

loscope moves closer to the specified value.
In this adjustment, waveform varies at intervals of approx. 3%.
Adjust the waveform so that the specified value is satisfied as
much as possible.

9. Press the  ENTER/YES  key, display “EFB=$    SAVE” for a

moment and save the adjustment results in the non-volatile
memory.
Next “EFBAL MO-P” is displayed.

10. Press the  ENTER/YES  key and display “EFB=$    MO-P”.

The optical pick-up moves to the pit area automatically and servo
is imposed.

+
–

oscilloscope

10 pF

330 k 

Ω

TP (TEO)

TP (VC)

+
–

BD (MD) board

TP (TEO)

TP (VC)

oscilloscope

Adjusting Method:
1. Connect an oscilloscope to TP (TEO) and TP (VC) of the BD

(MD) board.

2. Load a MO disc (any available on the market).
3. Press the 

0 key or ) key and move the optical pick-up

outside the pit.

4. Turning the MULTI JOG dial and display “EFBAL ADJUST”.
5. Press the  ENTER/YES  key and display “EFBAL MO-W”.

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

6. Adjust RV101 of the BD (MD) board so that the waveform of

the oscilloscope becomes the specified value.
(MO groove write power traverse adjustment)

(Traverse Waveform)

A

B

VC

specification: A=B

7. Press the  ENTER/YES  key and display “EFB=$    MO-R”.

(Laser power: MO reading)

8. Turning the MULTI JOG dial so that waveforms of the oscillo-

scope becomes the specified value.
(When the MULTI JOG dial is turned, the    of “EFB=     ”
changes and the waveform changes.) in this adjustment, wave-
form varies at intervals of approx. 3%. Adjust the waveform so
that the specified value is satisfied as much as possible.
(MO groove read power traverse adjustment)

(Traverse Waveform)

A

B

VC

specification: A=B

(Traverse Waveform)

12. Press the  ENTER/YES  key, display “EFB=$

SAVE” for a

moment and save the adjustment results in the non-volatile
memory.
Next “EFBAL CD” is displayed. The disc stops rotating auto-
matically.

13. Press the  

§ (MD)  key and remove the MO disc.

14. Load the test disc TDYS-1.
15. Press the  ENTER/YES  key and display “EFB=$

CD”. Servo

is imposed automatically.

16. Turning the MULTI JOG dial so that the waveforms of the os-

cilloscope moves closer to the specified value.
In this adjustment, waveform varies at intervals of  approx. 3%.
Adjust the waveform so that the specified value is satisfied as
much as possible.

A

B

VC

specification: A=B

17. Press the  ENTER/YES  key, display “EFB=$   SAVE” for a

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

18. Press the  

§ (MD)  key and remove the test disc TDYS-1.

(Traverse Waveform)

A

B

VC

specification: A=B