MZ-NF810/NF810CK

SECTION 5

ELECTRICAL ADJUSTMENTS

Outline

In this set, automatic adjustment of CD and MO can be per- formed by entering the test mode.

However, before starting automatic adjustment, the memory clear, power supply adjustment, and laser power check must be performed in the manual mode.

A key having no particular description in the text, indicates a set key.

For the LCD display, the LCD on the remote commander is shown, but the contents of LCD display on the set are same.

Precautions for Adjustment

1.Adjustment must be done in the test mode only. After adjusting, release the test mode.

2.Use the following tools and measuring instruments.

• Test CD disc

TDYS-1

 

(Part No. : 4-963-646-01)

SONY MO disc available on the market

Digital voltmeter

• Laser power meter LPM-8001

(Part No. : J-2501-046-A)

Thermometer (using the Temperature Correction)

Personal computer

USB cable

3.Unless specified otherwise, supply DC 3V from the DC IN 3V jack (J951).

4.Switch position

HOLD switch ............................................... ON

2.Press the X key.

Remote commander LCD display

021ResOK?

3.Press the X key once more.

Remote commander LCD display

021R e s * * *

NV reset (after several seconds)

021 R e s e t !

4.Press the xCANCEL/CHG key to quit the manual mode, and return to the test mode (display check mode).

Temparature Correction

• Adjustment Method of Temperature Correction

1.Select the manual mode of the test mode, and set the item num- ber 015 (see page 14).

Remote commander LCD display

015 SetTmp **

**: Adjusted value

Adjustment Sequence

1.NV Reset (item number: 021)

(EEPROM clear) r

2.Temperature Correction (item number: 015) r

3.Power Supply Manual Adjustment

r

4.Laser Power Check r

5.CD Overall Adjustment (item number: 031) r

6.MO Overall Adjustment (item number: 034) r

7.RESUME Clear (item number 043)

r

8.Rewriting the Patch Data

(at replacement of the MAIN board) r

9.Rewriting the NV values

Manual Mode

Overall Mode

Manual Mode

2.Measure the ambient temperature.

3.Adjust with [VOL +] or [VOL --]key so that the adjusted value (hexadecimal value) becomes the ambient temperature. (Initial value : 19h = 25˚C, Adjusting range : 80h to 7fh (–128˚C to +127˚C))

4.Press the X key or press the key on the remote commander to write the adjusted value.

Power Supply Manual Adjustment

• Adjustment sequence

Adjustment must be done with the following steps.

1.

VC1_LOW (PB) adjustment (item number : 741)

2.

VC1_HIGH (REC) adjustment (item number : 742)

3.

VC2_LOW adjustment (item number : 743)

4.

VC2_HIGH adjustment (item number : 744)

5.

REG1 adjustment (item number : 745)

6.

REG3_LOW1 adjustment (item number : 747)

7.

REG3_LOW2 adjustment (item number : 748)

8.

REG3_HIGH adjustment (item number : 749)

9.

VREC_LOW (X2 speed) adjustment (item number : 751)

10.

VREC_MIDDLE (X4 speed)adjustment (item number : 752)

11. VREC_HIGH (HEAD MOTOR) adjustment (item number : 753)

12.

CHGV_LOW adjustment (item number : 755)

NV Reset

• Setting Method of NV Reset

1.Select the manual mode of the test mode, and set item number 021 NV Reset (see page 14).

Remote commander LCD display

021 ResNV CC

13.

CHGV_HIGH adjustment (item number : 756)

14.

CHGI_LOW (current) adjustment (item number : 757)

15.

CHGI_HIGH (current) adjustment (item number : 758)

• Setting Method of Power Supply Manual Adjustment

1.Make sure that the power supply voltage is 3V.

2.Select the manual mode of the test mode (see page 14).

3.Set item number.

Note: Power supply adjustment auto item feed mode (page 23) is available to perform the temperature Correction and Power Supply Adjustment without entering the manual mode.

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Sony MZ-NF810 service manual ResOK?, E s e t, SetTmp, ResNV CC

MZ-NF810 specifications

The Sony MZ-NF810 is a notable entry in the portable digital music player market, primarily aimed at users who seek high-quality audio playback and advanced recording capabilities. This MiniDisc player is celebrated for its compact design, making it an ideal companion for on-the-go listeners who value both audio quality and portability.

One of the standout features of the MZ-NF810 is its support for ATRAC compression technology. ATRAC, short for Adaptive Transform Acoustic Coding, provides a means to compress audio files while still maintaining impressive sound fidelity. This technology was specifically designed to optimize audio for the MiniDisc format, allowing users to enjoy longer playtimes without sacrificing sound quality. The MZ-NF810 can store up to 40 hours of music on a single battery charge, a significant advantage for audiophiles and casual listeners alike.

The device also boasts a high-resolution LCD display, providing crucial information about the currently playing track, including title, artist, and remaining battery life. Navigation is smooth and user-friendly, allowing users to access their music collections with ease. In addition, the MZ-NF810 supports USB connectivity, enabling users to transfer music and files directly from their computers. This feature eliminates the need for additional software, streamlining the process of loading music onto the device.

An important aspect of the MZ-NF810 is its recording capabilities. The player allows users to record live audio directly onto MiniDiscs, providing the freedom to capture concerts, lectures, or personal notes. The addition of various recording modes, including long-play options, enhances its utility for users who need diverse functionality.

Sound quality is further augmented with features such as Dynamic Bass Boost and a five-band equalizer, allowing users to tailor their listening experience to their preferences. The MZ-NF810 also supports various audio formats, adding to its versatility as a personal audio device.

Lastly, the MZ-NF810's sleek and lightweight design makes it not only aesthetically pleasing but also comfortable to carry, making it a practical choice for those who lead active lifestyles. In summary, the Sony MZ-NF810 MiniDisc player stands out for its audio quality, recording features, and user-friendly design, catering to music enthusiasts who demand both performance and portability in their listening experience.