ZS-M30 - Sony Audio Service Manual (repair manual). Page 23

23

10. Press the  NO/CANCEL  button to display “LDPWR

 CHECK” and stop the laser emission.
(The  NO/CANCEL  button is effective at all times to stop
the laser emission)

Note 1: After step 9, each time the 

 YES/ENTER

  button is pressed, the

display will be switched “LD 0.7 mW $ 

 ”, “LD 6.2 mW $ 

 ”,

and “LD WP 

 $ 

 ”. Nothing needs to be performed here.

( 

 = correction)

KMS260B

27X40
B0825

lOP=82.5 mA in this case
lOP (mA) = Digital voltmeter reading (mV)/3.3 (

Ω

)

(Optical pick-up label)

Adjusting Procedure:
1. Connect an oscilloscope to TP504 (TE) and TP506 (VC) on

the MD board.

2. Load a disc (any available on the market). (Refer to Note 1)
3. Press the  M  button to move the optical pick-up outside the

pit.

4. Turn the JOG dial to display “EFBAL ADJUST”.
5. Press the  YES/ENTER  button to display “EFB = MO-R”.

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

6. Turn the JOG dial so that the waveform of the oscilloscope be

comes the specified value.
(When the JOG dial is turned, the 

 of “EFB = 

 ”  changes

and the waveform changes ) In this adjust-ment, wave form 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)

7. Press the  YES/ENTER  button and save the result of adjust-

ment to the non-volatile memory. (“EFB = SAVE” will be
displayed for a moment. Then “EFB = MO-W” will be dis-
played)

8. Turn the JOG dial so that the waveform of the oscilloscope be

comes the specified value.
(When the JOG dial is turned, the 

 of “EFB- 

 ” changes and

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

 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

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

 

 

 

 

 

 

 

 

C521

C526

L509

5

17

C519

C520 C522

R519

R518

R533

R531

R535

IC502

R524

R532

R525

R540

R542

R5

4

C546

R538

C550

 

 

 

 

 

 

 

 

 

TP505

(RF)

TP506

(VC)

TP504

(TE)

36

25

24

20

37

40

30

35

 (SIDE B)

Ω

oscilloscope
(DC range)

 

 

 

 

 

 

 

 

C521

C526

L509

5

17

C519

C520 C522

R519

R518

R533

R531

R535

IC502

R524

R532

R525

R540

R542

R5

4

C546

R538

C550

 

 

 

 

 

 

 

 

 

TP505

(RF)

TP506

(VC)

TP504

(TE)

36

25

24

20

37

40

30

35

[MD BOARD]
 (SIDE B)

oscilloscope
(DC range)

A

B

VC

Specification : A = B

Traverse Waveform

A

B

VC

Specification : A = B

Traverse Waveform

Specified Value:
Laser power meter reading : 7.0 

±

 0.2 mW

Digital voltmeter reading : Value on the optical pick-up label

±

 10%