MZ-NF610

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.

3.Press the X key once more.

Set LCD display

0 21 R e s * * *

NV reset (after several seconds)

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

Adjustment Sequence

1.

NV Reset (item number: 021)

 

 

 

(EEPROM clear)

 

 

 

 

r

 

 

 

2.

 

 

Temperature Correction (item number: 015)

 

 

r

Manual Mode

3.

Power Supply Manual Adjustment

 

 

 

r

 

 

 

4.

Laser Power Check

 

 

 

r

 

 

 

5.

CD Overall Adjustment (item number: 031)

 

 

 

r

Overall Mode

6.

MO Overall Adjustment (item number: 034)

 

 

r

 

 

 

7.

RESUME Clear (item number 043)

Manual Mode

 

r

 

 

 

 

8.Rewriting the Patch Data

(at replacement of the MAIN board) r

9.Rewriting the NV values

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).

Set LCD display

0 21

* * * S C C

 

 

2.Press the X key.

Set LCD display

0 21

R e s O K ?

 

 

0 21

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).

Set LCD display

0 15

S e t T m p

 

 

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)

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.

Note1: BATT- terminal is not GND when AC adaptor is used.

Note2: Power supply adjustment auto item feed mode (page 25) is available to perform the temperature Correction and Power Supply Adjustment without entering the manual mode.

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Sony MZ-NF610 service manual Section Electrical Adjustments

MZ-NF610 specifications

The Sony MZ-NF610 is a standout portable mini disc player and recorder that epitomizes the innovation synonymous with Sony in the early 2000s. Released as part of the Net MiniDisc series, it offered a convenient way to manage and enjoy music on the go. While the popularity of digital downloads and streaming services has eclipsed physical media formats, the MZ-NF610 remains a nostalgic piece of technology that reflects a unique era in personal audio.

One of the main features of the MZ-NF610 is its large storage capacity, leveraging the MiniDisc format to offer up to 1GB of data storage on each disc. This allows music enthusiasts to store multiple albums or hours of music in a compact form. The device supports LP2 and LP4 recording modes, which not only provide flexibility in recording quality but also enhance the total recording time, making it ideal for long journeys or extensive music libraries.

The MZ-NF610 showcases SONY’s exceptional ATRAC3 encoding technology, which compresses audio files while preserving sound quality. This technology enables users to transfer music from CD directly to MiniDisc with impressive fidelity. Additionally, with its USB connection, the MZ-NF610 provides a seamless way to transfer music files from a computer, further enhancing its usability.

An important characteristic of the MZ-NF610 is its design. This model is compact, lightweight, and equipped with an easy-to-use interface, making it perfect for portability. The ergonomically designed controls simplify navigation through tracks and menus, while the backlit LCD display ensures visibility in various lighting conditions.

Battery life is another notable feature of the MZ-NF610, with the ability to run for long periods on a single charge. The player is powered by a rechargeable lithium-ion battery, which enhances its eco-friendliness and eliminates the need for disposable batteries.

Overall, the Sony MZ-NF610 is a remarkable combination of portability, audio quality, and user convenience. It highlights Sony’s commitment to pushing the boundaries of personal audio technology, making it a cherished collector's item for those who appreciate the charm of MiniDisc players. Even in an age dominated by digital streaming, the MZ-NF610 stands as a testament to the enduring appeal of physical media and the nostalgic experience it provides.