Sony MZ-N707 service manual S N V C C, S O K ?, S e t, Section Electrical Adjustments

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MZ-N707

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.

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 ............................................... ON

ADJUSTMENT SEQUENCE

1.

NV Reset (EEPROM clear)

 

Manual Mode

 

r

 

 

2.

Power Supply Manual Adjustment

 

Manual Mode

 

 

 

r

 

 

3.

Temperature Correction (item number: 015)

 

 

r

 

 

Manual Mode

4.

Laser Power Check

 

 

r

 

 

 

5.

Electrical Offset Adjustment

 

 

Caution: This adjustment must be made with

 

 

 

no disc loaded.

 

 

r

Overall Mode

 

6.

CD Overall Adjustment

 

 

 

r

 

 

 

7.

MO Overall Adjustment

 

 

 

r

 

 

Manual Mode

8.

RESUME Clear

 

Note: If the version of the microcomputer is 1.000 or later, “3. Tempera- ture Correction” and “2. Power Supply Manual Adjustment” can be performed continuously in reverse order with pressing the [END SEARCH] key in the overall adjustment mode.

NV RESET

Caution: The shipment data will be cleared when the NV is reset. Therefore, change the NV adjusted values following the Change of NV Adjusted Values immediately after the NV was reset.

Change the NV adjustment values according to the mi- crocomputer version.

• 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

R e s N V C C

021

2.Press the X key.

Set LCD display

R e s O K ?

021

3.Press the X key once more.

Set LCD display

R e s * * *

0 21

rNV reset (after several seconds)

R e s e t !

021

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

•Change of NV Adjusted Values (Version 1.100)

Caution: Change the NV adjustment values according to the mi- crocomputer version.

In this set, some adjusted values were set in the manual mode at the shipment, but these will be cleared when the NV is reset. Therefore, modify the NV adjusted values through the following procedure immediately after the NV was reset.

1.Item numbers in which the NV adjusted values are to be modi- fied

–Change ABCD gain [Hpit] initial value (item number 336) Caution: The ABCD gain [Hpit] initial value must be changed before the overall adjustment.

–Change BatFlg value (item number 741)

–Change NiRec0 to 4 values (item numbers 771 to 775)

–Change NiPb 0 to 4 values (item numbers 776 to 779, 781)

–Change CLV drive voltage limiter (item numbers 865, 866)

–Change x2 CLV speed gain, +6dB compared to conventional (item numbers 867, 868)

–Change x2 CLV phase gain, +3dB compared to conventional (item numbers 871, 872)

–Change x2/x1 switching temperature threshold value (+10° C t +5° C) (item numbers 873, 874)

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Contents 873-458-01 SpecificationsMZ-N707 Flexible Circuit Board Repairing Table of ContentsDisassembly DiagramsSystem requirements Section Servicing NotesSection General Looking at the controlsDisassembly Flow Section DisassemblyUpper Panel Section Case LowerMechanism Deck MT-MZN707-177 LCD MODULE, Upper Panel SUB AssyMain Board Gear SA Screw M1.4 OP Service Assy LCX-5RHolder Assy Gear HA Releasing the Test Mode Section Test ModeSetting Method of Test Mode Operation in Setting the Test ModeN u a l Configuration of Test ModeManual Mode Transition Method in Manual Mode8 S 1 B Overall Adjustment ModeSELF-DIAGNOSIS Result Display Mode Self-Diagnosis Result Display Mode Setting MethodDescription of Indication History Reset the Error Display CodeDescription of Error Indication Codes Setting Method of Reset the Error Display CodeL a Y * * 0 Sound Skip Check Result Display ModeV r A t U l R s R y M p # # # # # #C O K * * 8 T O K * * 8S e t Section Electrical AdjustmentsS N V C C S O K ?R e c 1 * * 7 C d G n * * 3T F l g * * 7 R e c 0 * * 7U m * * 8 P b 2 * * 7P b 3 * * 7 P b 4 * * 7L P W M * * 7 Power Supply Manual AdjustmentH P W M * * 7 C p w H * * 7 P w m L * * 7P w m H * * 7 C p w L * * 7I t P w T T m p * * 0S e r E f P wMain Board Component Side IC501S y 1 S y * * 0S t CD and MO Overall Adjustment Items Adjustment Method of CD and MO Overall Adjustment ModeResume Clear Resume Clear Setting Method# # # S 0 0 0 S C l r 0Rewriting the Patch Data PreparationServicing Notes Pre-checkMZ-N707 MZ-N707 Block Diagram SERVO/USB Section Section DiagramsBlock Diagram Audio Section Block Diagram DISPLAY/KEY CONTROL/POWER Supply Section Lead Layouts Main Board Component Side Semiconductor LocationIC902 Components identified by mark 0or dotted F1VM Schematic Diagram Main Board 3/4 See page 42 for Waveforms KCT 22.7 ∝ s WaveformsIC302 TA2131FL EL IC Block Diagrams IC301 AK5354VT-E2IC501 SN761057A IC551 SC111258FCR2 IC601 XPC18A22AFCR2 IC901 XPC18A32FCR2 IC PIN Function Description SSB Data DRAMVSS0DVSS0 DVDD0REC OPR LED TrstVG CTL Aout SELREC KEY Vref MONVbus DET WK DETVrefr DavddVrefl AoutlIFVSS3 DVSS3DVDD3 IFVDD3Flashvss FlashvddUpper PANEL, Case Lower Section Section Exploded ViewsMT-MZN707-177 Main board section Chassis Section101 104 102 103 Main Board Section301 353 Section Main Electrical Parts ListMain XPC18A22AFCR2 Resistor OPEN/CLOSE Detect EMI Filter Card Operating Instruction Revision History

MZ-N707 specifications

The Sony MZ-N707, released in the early 2000s, is a remarkable portable MiniDisc player that represents a significant leap forward in digital audio technology. Known for its compact size and impressive sound quality, the MZ-N707 quickly became a favorite among music enthusiasts during its heyday.

One of the standout features of the MZ-N707 is its advanced ATRAC (Adaptive Transform Acoustic Coding) audio compression technology. This proprietary format allows for high-quality audio playback while minimizing file size, making it easier for users to store and carry their favorite tracks. The MiniDisc format supports a variety of bit rates, enabling listeners to choose between higher quality or more storage capacity based on their personal preferences.

The MZ-N707’s sleek and lightweight design is ideal for on-the-go listening, fitting comfortably in a pocket or bag. It boasts a clear LCD display that provides essential information such as track titles, playback time, and battery life, ensuring users stay informed while enjoying their music.

Battery life is another major selling point for the MZ-N707. With the ability to run for several hours on a single charge, this player is perfect for long journeys or extended listening sessions. Additionally, it uses a rechargeable lithium-ion battery, which was a welcome feature at the time, reducing the need for frequent battery replacements and promoting environmental sustainability.

Connectivity options also make the MZ-N707 an appealing choice. It comes with an integrated USB port for easy data transfer between the player and a computer, allowing users to upload their favorite audio tracks with minimal hassle. Furthermore, it supports various audio formats, enabling compatibility with a wide range of music sources.

The MZ-N707 is equipped with a range of customizable sound settings, including equalizer presets that allow users to tailor the audio output to fit their listening preferences. This flexibility enhances the user experience, making it suitable for different genres and environments.

In summary, the Sony MZ-N707 MiniDisc player features cutting-edge technology, portability, excellent battery life, and user-friendly options that appeal to audiophiles and casual listeners alike. Its legacy is a testament to Sony's commitment to innovation in portable audio solutions during the early 21st century. Whether for casual listening or serious music collection, the MZ-N707 remains a notable device in the history of digital audio.
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