MZ-G750/R700

SECTION 5

ELECTRICAL ADJUSTMENTS

5-1. Outline

•In this set, automatic adjustment of CD and MO can be per- formed by entering the test mode (see page 12).

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 display on the set is shown.

• Setting method of NV reset

1.Select the manual mode of the test mode, and set item number 021NV Reset (see page 13).

This set LCD display

ResNV CC 0 21

2.Press the X key.

This set LCD display

5-2. 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)

3.Unless specified otherwise, supply DC 3V from the DC IN 3V jack (J601).

4.Switch position

HOLD switch

OFF

Res OK? 0 21

3.Press the X key once more.

This set LCD display

Res

0 21

 

NV reset(after several seconds)

Reset! 0 21

5-3. Adjustment Sequence

1.NV Reset(Memory clear)

2.Power Supply Manual Adjustment

3.Temperature Correction(item number:014)

4.Laser Power Check

5.Electrical offset Adjustment

Caution: This adjustment must be made with no disc loaded.

6.CD Overall Adjustment

7.MO Overall Adjustment

8.RESUME Clear

Manual Mode

Overall Mode

Manual Mode

Overall Mode

Manual Mode

4.Press the x key to quit the manual mode, and activate the test mode (display check mode).

• Change of Adjusted Values

On the set having the microcomputer version 1.000, some adjusted values were set in the manual mode at the shipment, but these data will be cleared when the NV is reset. Therefore, on the set having the microcomputer version 1.000, modify the adjusted values through the following procedure immediately after the NV was reset.

1.Item numbers in which the adjusted values are to be modified Item number 832

Item number 862 Item number 871 Item number 872

2.Adjusted values modifying procedure

1)Select the manual mode of the test mode, and set item number 832 (see page 13).

This set LCD display

5-4. NV Reset

Caution: On the set having the microcomputer version 1.000, some adjusted values were set in the manual mode at the shipment, but these data will be cleared when the NV is reset. Therefore, on the set having the micro- computer version 1.000, change the adjusted values following the Change of Adjusted Values immediately after the NV was reset.

Pw-T W

8 32

:Adjusted value

2)Adjust with the [VOL+] key (adjusted value up) or [VOL--]key (adjusted value down) so that the adjusted value becomes E4.

18

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Sony MZ-R700 service manual ResNV CC 0, Res OK? 0, Reset! 0, Pw-T W
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MZ-R700 specifications

The Sony MZ-R700 is a compact digital minidisc recorder that has made a significant mark in the portable audio landscape since its introduction. Known for its outstanding sound quality and portable design, it appeals to audiophiles and casual listeners alike. The MZ-R700 is lauded for its ability to record and playback high-quality audio, making it a go-to device for musicians, DJs, and anyone who values sound fidelity.

One of the main features of the MZ-R700 is its ability to record music in various formats. It supports the ATRAC (Adaptive Transform Acoustic Coding) compression format, which allows users to store more audio data on a minidisc while maintaining remarkable sound clarity. This technology ensures that even with compression, the audio remains rich and engaging.

The MZ-R700 comes equipped with a digital recording feature, enabling users to transfer tracks directly from CDs or other digital sources without sacrificing quality. It is compatible with a wide range of digital audio formats, allowing for flexibility in recording options. Additionally, the device offers various recording modes, giving users the choice between standard quality and long-play modes, depending on their needs.

Portability is a key characteristic of the MZ-R700. Weighing just a few ounces and featuring a sleek, ergonomic design, it fits comfortably in the hand and can easily be carried in a pocket or bag. Its user-friendly interface includes an LCD screen that displays track information, making it easy for users to navigate through their music library.

Another notable feature is its battery efficiency. The MZ-R700 is powered by a rechargeable lithium-ion battery, providing extended playback time. Users can enjoy hours of continuous music playback, making it perfect for long journeys or outdoor activities.

The popular mic input allows for live recordings, a feature that musicians and podcasters find particularly beneficial. Moreover, the unit supports various input options, including a line-in and a 3.5mm microphone jack, ensuring versatility for different recording needs.

In summary, the Sony MZ-R700 is a robust and feature-rich digital minidisc recorder that combines portability, superior sound quality, and user-friendly design. With advanced recording technologies and efficient battery life, it caters to a variety of audio enthusiasts, making it a remarkable choice for portable sound recording and playback.
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