Sony MZ-N707 service manual L P W M * * 7, H P W M * * 7, Power Supply Manual Adjustment

Page 22

MZ-N707

55)Select manual mode of the test mode, and set item number 873 (see page 14).

Set LCD display

V 6 n u m * * 8 73

**: Adjusted value

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

57)Press the X key to write the adjusted value.

58)Select manual mode of the test mode, and set item number 874 (see page 14).

Set LCD display

V 6 d a t * * 8 74

**: Adjusted value

59)Adjust with the [VOL +] key (adjusted value up) or [VOL --]key (adjusted value down) so that the adjusted value becomes 05.

60)Press the X key to write the adjusted value.

POWER SUPPLY MANUAL ADJUSTMENT

• Adjustment Sequence

Adjustment must be done with the following steps.

1.Vc PWM Duty (L) adjustment (item number: 762) r

2.Vc PWM Duty (H) adjustment (item number: 763) r

3.Vl PWM Duty (L) adjustment (item number: 764) r

4.Vl PWM Duty (H) adjustment (item number: 765) r

5.Vrec PWM Duty (L) adjustment (item number: 766) r

6.Vrec PWM Duty (H) adjustment (item number: 767)

• 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.

•Adjustment Method of Vc PWM Duty (L) (item number: 762)

Set LCD display

V c l P W M * * 7 62

**: Adjusted value

1.Connect a digital voltmeter to the AP912 (VCO) on the MAIN

board, and adjust [VOL +] key (voltage up) or [VOL --]key (volt- age down) so that the voltage becomes 2.40 ± 0.05 V.

digital voltmeter

MAIN board

AP912 (VCO)

AP602 (GND)

2. Press the X key to write the adjusted value.

Adjustment and Connection Location: MAIN board (see page 25)

•Adjustment Method of Vc PWM Duty (H) (item number: 763)

Set LCD display

V c h P W M * * 7 63

**: Adjusted value

1.Connect a digital voltmeter to the AP912 (VCO) on the MAIN

board, and adjust [VOL +] key (voltage up) or [VOL --]key (voltage down) so that the voltage becomes 2.75 ± 0.05 V.

digital voltmeter

MAIN board

AP912 (VCO)

AP602 (GND)

2. Press the X key to write the adjusted value.

Adjustment and Connection Location: MAIN board (see page 25)

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Contents Specifications 873-458-01MZ-N707 Diagrams Table of ContentsDisassembly Flexible Circuit Board RepairingSection Servicing Notes System requirementsLooking at the controls Section GeneralSection Disassembly Disassembly FlowCase Lower Upper Panel SectionLCD MODULE, Upper Panel SUB Assy Mechanism Deck MT-MZN707-177Main Board OP Service Assy LCX-5R Gear SA Screw M1.4Holder Assy Gear HA Operation in Setting the Test Mode Section Test ModeSetting Method of Test Mode Releasing the Test ModeTransition Method in Manual Mode Configuration of Test ModeManual Mode N u a lSelf-Diagnosis Result Display Mode Setting Method Overall Adjustment ModeSELF-DIAGNOSIS Result Display Mode 8 S 1 BSetting Method of Reset the Error Display Code Reset the Error Display CodeDescription of Error Indication Codes Description of Indication HistoryA t U l R s R y M p # # # # # # Sound Skip Check Result Display ModeV r L a Y * * 0T O K * * 8 C O K * * 8S O K ? Section Electrical AdjustmentsS N V C C S e tR e c 0 * * 7 C d G n * * 3T F l g * * 7 R e c 1 * * 7P b 4 * * 7 P b 2 * * 7P b 3 * * 7 U m * * 8L P W M * * 7 Power Supply Manual AdjustmentH P W M * * 7 C p w L * * 7 P w m L * * 7P w m H * * 7 C p w H * * 7E f P w T T m p * * 0S e r I t P wIC501 Main Board Component SideS y 1 S y * * 0S t Adjustment Method of CD and MO Overall Adjustment Mode CD and MO Overall Adjustment ItemsS C l r 0 Resume Clear Setting Method# # # S 0 0 0 Resume ClearPre-check PreparationServicing Notes Rewriting the Patch DataMZ-N707 MZ-N707 Section Diagrams Block Diagram SERVO/USB SectionBlock Diagram Audio Section Block Diagram DISPLAY/KEY CONTROL/POWER Supply Section Lead Layouts Semiconductor Location Main Board Component SideIC902 Components identified by mark 0or dotted F1VM Schematic Diagram Main Board 3/4 See page 42 for Waveforms KCT Waveforms 22.7 ∝ sIC Block Diagrams IC301 AK5354VT-E2 IC302 TA2131FL ELIC501 SN761057A IC551 SC111258FCR2 IC601 XPC18A22AFCR2 IC901 XPC18A32FCR2 IC PIN Function Description DVDD0 DRAMVSS0DVSS0 SSB DataAout SEL TrstVG CTL REC OPR LEDWK DET Vref MONVbus DET REC KEYAoutl DavddVrefl VrefrIFVDD3 DVSS3DVDD3 IFVSS3Flashvdd FlashvssSection Exploded Views Upper PANEL, Case Lower SectionChassis Section MT-MZN707-177 Main board sectionMain Board Section 101 104 102 103301 353 Main Electrical Parts List SectionMain 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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