10.Observe the waveform of the oscilloscope, and check that the specified value is satisfied. Do not press the =, + but- tons.

(Traverse Waveform)

A

VC

B

Specified value : Below 10% offset value

Offset value (%) = IA – BI X 100 2 (A + B)

11.Press the ^“PROGRAM” button display “EF MO CHECK” The disc stops rotating automatically.

12.Press the 6(EJECT) button and remove the disc.

13.Load the check disc (MD) TDYS-1.

14.Press the + button and display “EF CD CHECK”.

15. Press the ^ “PROGRAM” button and display “EFB = CD”. Servo is imposed automatically.

16.Observe the waveform of the oscilloscope, and check that the specified value is satisfied. Do not press the =, + but- tons.

(Traverse Waveform)

A

VC

B

Specified value : Below 10% offset value

Offset value (%) = IA – BI X 100 2 (A + B)

17.Press the ^ “PROGRAM” button and display “EF CD CHECK”.

18.Press the 6(EJECT) 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

BD board

330 kΩ

CN110 pin 3 (TE)

10pF

CN110 pin 1

(VC)

 

5-6-4. Focus Bias Check

Change the focus bias and check the focus tolerance amount.

Checking Procedure :

1.Load a test disk (MDW-74/AU-1).

2.Rotate the + button and display “CPLAY MODE”.

3.Press the ^“PROGRAM” button twice and display “CPLAY

 

MID”.

 

 

4.

Press the

p“PROGRAM”

button when “C1 =

AD =

”

 

is displayed.

 

 

5.

Press the

 

 

button and display “FBIAS CHECK”.

 

+

 

6.

Press the

 

 

 

 

 

 

button and display “

/

c =

 

 

^“PROGRAM”

 

”.

 

 

 

The first four digits indicate the C1 error rate, the two digits

 

after “/” indicate ADER, and the 2 digits after “c =” indicate the

 

focus bias value.

 

 

 

Check that the C1 error is below 220 and ADER is below 2.

7.

Press the

^“PROGRAM”

button and display “

/

b =

 

”.

 

 

 

Check that the C1 error is below 220 and ADER is below 2.

8.

Press the

 

^“PROGRAM”

button and display “

/

a =

 

”.

 

 

 

Check that the C1 error is below 220 and ADER is below 2.

9.

Press the

p“PROGRAM”

button, next press the

6 (EJECT)

 

button, and remove the test

disc.

 

 

5-6-5. C PLAY Checking

MO Error Rate Check

Checking Procedure :

1.Press a test disk (MDW-74/AU-1).

2.Rotate the + button knob and display “CPLAY MODE” .

3.Press the ^“PROGRAM” button and display “CPLAY MID”.

4.The display changes to “C1 = AD = ”.

5.If the C1 error rate is below 80, check that ADER is below 2.

6. Press the p“PROGRAM” button, stop playback, press the 6

(EJECT) button, and test disc.

CD Error Rate Check

Checking Procedure :

1.Load a check disc (MD) TDYS-1.

2.Press the + button knob and display “CPLAY MODE”.

3.Press the ^“PROGRAM” button and display “CPLAY MID”.

4.The display changes to “C1 = AD = ”.

5.Check that the C1 error rate is below 50.

6. Press the

p“PROGRAM”

button, stop playback, press the

6

 

 

 

 

 

 

(EJECT)

button, and the test disc.

5-6-6. Self-Recording/playback Check

Prepare a continuous recording disc using the unit to be repaired and check the error rate.

Checking Procedure :

1.Insert a recordable disc (blank disc) into the unit.

2.Press the + button knob to display “CREC MODE”.

3.Press the ^“PROGRAM” button to display the “CREC MID”.

4.When recording starts, “ REC ” is displayed, this becomes “CREC (@@@@)" (@@@@ is the address), and recording starts.

5.About 1 minute later, press the p“PROGRAM” button to stop continuous recording.

6.Press the = button to display “C PLAY MODE”.

7.Press the ^“PROGRAM” button to display “C PLAY MID”.

8.“C1 = AD = ” will be displayed.

9.Check that the C1 error becomes below 80 and the AD error below 2.

10.Press the p“PROGRAM” button to stop playback, and press the 6(EJECT) button and remove the disc.

24

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Sony MDS-PC2 service manual Focus Bias Check, Eject, Play Checking MO Error Rate Check, CD Error Rate Check
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MDS-PC2 specifications

The Sony MDS-PC2 is a compact yet powerful digital MiniDisc recorder that was designed to bring studio-quality recording capabilities to the consumer level. Launched in the late 1990s, this device was particularly notable for its versatility and advanced audio technologies, making it a favorite among audiophiles and home studio enthusiasts alike.

One of the standout features of the MDS-PC2 is its ability to record and playback audio with exceptional clarity. It utilizes the MiniDisc format, which employs a magneto-optical technology that allows for higher-quality recordings compared to traditional cassette formats. The MDS-PC2 supports various audio bit rates, including standard Stereo at 292 kbps and long play modes, which double the recording time at the cost of some audio fidelity. This flexibility allows users to tailor their recording settings to their specific needs.

The MDS-PC2 features an intuitive interface, including an easy-to-read LCD display that shows vital information about the track, such as its name, length, and remaining recording time. The device is equipped with multiple input options, including optical and analog connections, facilitating seamless integration into any audio setup. The built-in digital signal processor (DSP) enhances the recording quality by minimizing background noise and distortion, providing a clean and crisp listening experience.

Another notable characteristic is the MDS-PC2's editing capabilities. Users can easily create custom playlists, erase tracks, and rearrange audio sequences with a few simple commands. The unit also supports fade-in and fade-out functionalities, allowing for smooth transitions between tracks. The flexibility in editing makes it a potent tool for podcasters, musicians, and anyone looking to produce high-quality audio content.

Portability is another key aspect of the Sony MDS-PC2. Its lightweight design and durable build make it easy to transport, catering to users who are frequently on the move. Battery operation options provide additional convenience for those who wish to use the recorder away from a power source.

In summary, the Sony MDS-PC2 combines innovative technology with user-friendly features, making it an excellent choice for anyone seeking an efficient and high-quality MiniDisc recorder. Its capability to produce superior audio recordings, coupled with its adaptability and portability, has solidified its place as an essential tool for audio recording and playback in various settings.
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