5-13. ERROR RATE CHECK

5-13-1. CD Error Rate Check

Checking Procedure :

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

2.Press the =0/MD/CD/TUNING – button or )+/ MD/CD/TUNING + button and display “CPLAY MODE”.

3.Press the ENTER/YES “R” button twice and display “CPLAY MID”.

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

5.Check that the C1 error rate is below 20.

6. Press the MENU/NO “R” button, stop playback, press the 6 (MD) button, and remove the test disc.

5-13-2. MO Error Rate Check

Checking Procedure :

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

2.Press the =0/MD/CD/TUNING – button or )+/ MD/CD/TUNING + button and display “CPLAY MODE”.

3.Press the ENTER/YES “R” button and display “CPLAY MID”.

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

5.If the C1 error rate is below 50, check that ADER is 00.

6. Press the MENU/NO “R” button, stop playback, press the 6 (MD) button, and remove the test disc.

5-14. FOCUS BIAS CHECK

Change the focus bias and check the focus tolerance amount.

Checking Procedure :

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

2.Press the =0/MD/CD/TUNING – button or )+/ MD/CD/TUNING + button and display “CPLAY MODE”.

3.Press the ENTER/YES “R” button twice and display “CPLAY MID”.

4. Press the

MENU/NO “R”

button when “C1 =

AD = ”

is displayed.

 

5.Press the =0/MD/CD/TUNING – button or )+/ MD/CD/TUNING + button and display “FBIAS CHECK”.

6.

Press the ENTER/YES “R” button and display “

/

 

c =

 

”.

 

 

 

 

 

 

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 50 and ADER is below 2.

 

7.

Press the

ENTER/YES “R”

button and display “

/

 

b =

 

”.

 

 

 

 

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

8.

Press the

ENTER/YES “R”

button and display “

/

 

a =

 

”.

 

 

 

 

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

 

9.

Press the

MENU/NO “R”

button, next press the

6(MD)

but-

 

ton, and remove the test disc.

 

 

 

Note 1 : If the C1 error and ADER are above other than the speci- fied value at points a (step 8. in the above) or b (step 7. in the above), the focus bias adjustment may not have been carried out properly. Adjust perform the beginning again.

5-15. AUTO GAIN CONTROL OUTPUT LEVEL ADJUSTMENT

Be sure to perform this adjustment when the pickup is replaced. If the adjustment results becomes “Adjust NG!”, the pickup may be faulty or the servo system circuits may be abnormal.

5-15-1. CD Auto Gain Control Output Level Adjustment

Adjusting Procedure :

1.Insert the check disc (MD) TDYS-1.

2.Press the =0/MD/CD/TUNING – button or )+/ MD/CD/TUNING + button to display “AG Set (CD)”.

3.When the ENTER/YES “R” button is pressed, the adjustment will be performed automatically.

“Complete!!” will then be displayed momentarily when the value is recorded in the non-volatile memory, after which the display changes to “AG Set (CD)”.

4.Press the 6(MD) button to remove the disc.

5-15-2. MO Auto Gain Control Output Level Adjustment

Adjusting Procedure :

1.Insert the reference disc (MDW-74/AU-1) for recording.

2.Press the =0/MD/CD/TUNING – button to display “AG Set (MO)”.

3.When the ENTER/YES “R” button is pressed, the adjustment will be performed automatically.

“Complete!!” will then be displayed momentarily when the value is recorded in the non-volatile memory, after which the display changes to “AG Set (MO)”.

4.Press the 6(MD) button to remove the disc.

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Sony HCD-MD373 service manual Error Rate Check, Focus Bias Check, Auto Gain Control Output Level Adjustment
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HCD-MD373 specifications

The Sony HCD-MD373 is a compact mini audio system that offers an impressive blend of sound quality, versatility, and advanced technology, making it an ideal choice for audio enthusiasts and casual listeners alike. One of the standout features of the HCD-MD373 is its MiniDisc recorder/player, a legacy technology that allows users to record high-quality audio onto MiniDiscs, providing an alternative to traditional CDs and cassettes. This feature is particularly appealing for those looking to capture live music or create personalized playlists.

Another notable aspect of the HCD-MD373 is its integrated CD player, which supports a variety of formats including CD, CD-R, and CD-RW. This versatility means that users can enjoy their favorite albums without the hassle of switching devices. The audio system also includes a built-in AM/FM tuner, enabling users to easily tune into their favorite radio stations and enjoy live broadcasts.

The HCD-MD373 is equipped with a powerful amplifier that delivers impressive sound output, complemented by its two-way speaker system. The speakers provide a rich audio experience with clear highs and deep lows, making it suitable for various music genres, from classical to contemporary. The system also features a bass boost function that enhances low-frequency sounds, allowing for a more immersive listening experience.

In terms of connectivity, the HCD-MD373 offers multiple inputs and outputs, including audio line-in, headphone jacks, and a digital optical output. These features make it easy to connect external devices such as MP3 players, smartphones, or even home theater systems. Additionally, the audio system supports various playback options, including shuffle and repeat modes, providing enhanced flexibility for users.

The design of the HCD-MD373 is sleek and modern, with a compact form factor that allows it to fit seamlessly into any living space. Its user-friendly interface, complete with an LCD display, makes it easy to navigate and control playback settings. Overall, the Sony HCD-MD373 is a testament to Sony's commitment to quality audio experiences, combining innovative features, robust technology, and elegant design into a single, powerful audio system. Whether enjoying a quiet evening at home or hosting a gathering with friends, the HCD-MD373 is sure to deliver satisfying sound and performance.
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