MDS-JA30ES - Sony Audio Service Manual (repair manual). Page 15

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Save the temperature data at that time in the non-volatile memory
as 25 ˚C reference data.
Note :
1.

Usually, do not perform this adjustment.

2.

Perform this adjustment in an ambient temperature of 22 ˚C to
28 ˚C. Perform it immediately after the power is turned on
when the internal temperature of the unit is the same as the
ambient temperature.

3.

When D101 has been replaced, perform this adjustment after
the temperature of this part has become the ambient
temperature.

Adjusting Method :
1.

Rotate the AMS knob and display “TEMP ADJUS”.

2.

Press the YES button and select the “TEMP ADJUS” mode.

3.

“TEMP = 

” and the current temperature data will be

displayed.

4.

To save the data, press the YES button.
When not saving the data, press the NO button.

5.

When the YES button is pressed, “TEMP = 

 SAV” will be

displayed for some time, followed by “TEMP ADJUS”.
When the NO button is pressed, “TEMP ADJUS” will be
displayed.

The “TEMP =  

” should be within “E0 - EF”, “F0 - FF”, “00 -

0F”,  “10 - 1F” and “20 - 2F”.

Laser power
meter

Optical pick-up
objective lens

Digital voltmeter

BD board

TP (I + 5V)

TP (IOP)

Adjusting Method :
1.

Set the laser power meter on the objective lens of the optical
pick-up. (When it cannot be set properly, press the 

0 button

or 

) button and move the optical pick-up.)

Connect the digital volt meter to TP (IOP) and TP (I+5V).

2.

Rotate the AMS knob and display “LDPWR ADJUS”.
(Laser power : For adjustment)

3.

Press the YES button twice and display “LD $ 4B = 3.5 m”.

4.

Adjust RV102 of the BD board so that the reading of the laser
power meter becomes 3.45 ± 0.1mW.

5.

Press the YES button and display “LD $ 96 = 7.0 m”.
(Laser power : MO writing)

6.

Check that the laser power meter and digital voltmeter readings
satisfy the specified value.

Laser power meter reading : 7.0 

+ 0.2

 mW

Digital voltmeter reading : Optical pick-up displayed value ± 10%

(Optical pick-up label)

lop = 82.5 mA in this case
lop (mA) = Digital voltmeter reading (mV)/ 1 (

Ω

)

7.

Press the YES button and display “LD $ 0F = 0.7 m”.
(Laser power : MO reading)

8.

Check that the laser power meter at this time satisfies the
specified value.

Laser power meter reading : 0.70 

+ 0.05

 mW

9.

Press the NO button and display “LDPWR ADJUS”, and stop
laser emission.
(The NO button is effective at all times to stop the laser
emission.)

KMS

210A

27X40
B0825

– 0.3

– 0.1