Sony MZ-R700 service manual V1dat, V5num, V5dat, Assy, VclPWM, VchPWM, Vl PWM

Page 19

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

4)Select the manual mode of the test mode, and set item number 862 (see page 13).

This set LCD display

V1dat

8 62

:Adjusted value

5)Adjust with the [VOL+] key (adjusted value up) or [VOL--]key (adjusted value down) so that the adjusted value becomes 01.

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

7)Select the manual mode of the test mode, and set item number 871 (see page 13).

This set LCD display

V5num

8 71

:Adjusted value

8)Adjust with the [VOL+] key (adjusted value up) or [VOL--]key (adjusted value down) so that the adjusted value becomes 20.

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

10)Select the manual mode of the test mode, and set item number 872 (see page 13).

This set LCD display

V5dat

8 72

:Adjusted value

11)Adjust with the [VOL+] key (adjusted value up) or [VOL--]key (adjusted value down) so that the adjusted value becomes 39.

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

5-5. Power Supply Manual Adjustment

• Adjustment sequence

Adjustment must be done with the following steps.

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

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

3.Vl PWM Duty adjustment (item number 764)

•Setting method of power supply manual adjustment

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

2.Set the test mode (see page 12).

3.Press the . or [VOL--]key to activate the overall adjustment mode.

This set LCD display

Assy 00

0 00

4.Press the [END SEARCH] key. (the [END SEARCH] key causes the item number to be switched to 762.)

MZ-G750/R700

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

This set LCD display

VclPWM

7 62

:Adjusted value

1.Connect a digital voltmeter to the TP901 (VC) on the MAIN board, and adjust [VOL +] key (voltage up) or [VOL --]key (voltage down) so that the voltage becomes G750: 2.50 ± 0.01 V, R700: 2.40 ± 0.01 V.

digital

voltmeter

MAIN board

TP901(VC)

TP912(GND)

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

(The item number changes to 763 when X key is pressed)

Adjustment and Connection Location: MAIN board (see page 21)

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

This set LCD display

VchPWM

7 63

:Adjusted value

1.Connect a digital voltmeter to the TP901 (VC) on the MAIN board, and adjust [VOL +] key (voltage up) or [VOL --]key (voltage down) so that the voltage becomes G750: 2.50 ± 0.01 V, R700: 2.75 ± 0.01 V.

digital

voltmeter

MAIN board

TP901(VC)

TP912(GND)

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

(The item number changes to 764 when X key is pressed)

Adjustment and Connection Location: MAIN board (see page 21)

•Adjustment method of Vl PWM Duty (item number: 764)

This set LCD display

Vl PWM

7 64

: Adjusted value

 

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Contents MZ-G750/R700 SpecificationsMZ-G750/R700 Flexible Circuit Board RepairingDiagrams Table of ContentsElectrical Adjustments DisassemblyOptical PICK-UP Flexible Board Section Servicing NoteMZ-G750 Section GeneralMZ-R700 Panel ASSY, Lower Section DisassemblyPanel ASSY, Upper Main Board LCD ModuleMD Mechanism Deck Service ASSY, OPMotor Flexible Board Holder AssyMOTOR, DC M601, MOTOR, DC M603 MOTOR, DC M6028888e Section Test ModeVersion Ver 1.200 00 Manual Configuration of Test ModeManual Mode Transition method in Manual ModeLrefPw 1D 0 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 CodeKey Check Mode Sound Skip Check Result Display ModeRPLAY SET OK Res Reset! 0ResNV CC 0 Res OK? 0Assy V1datV5num V5datHrefPw SetTmpLaser LrefPwMain Boardside a Configuration of overall adjustmentOfst Overall Adjustment Mode Title DisplayElectrical Offset Adjusting Method Adjustment Method of Overall CD and MO Adjustment ModePatClr CC 0 Patch Data Rewriting When Nonvolatile Memory was ReplacedResume CC 0 ResClr0D59B2 Patch 00 00D581E 0D59000D6520 0D62000D6204 0D65000D651C 0D61200D6400 0D64F40D6D1C 0D6C000D6CF6 0D6D000D7603 0D75000D751C 0D7600IC PIN Function Description Section DiagramsSET KEY Pause KEYMIC Sense MIFVSS3Lrck DSPVDD0DSPVSS0 XtslSlcw SldwSlcu SlcvSET CODE2 Open Close SWGND SW SET CODE0Flashvss Xhold SWSycn REC FlashvddBoard Block Diagram Servo SectionMain Board Block Diagram Audio SectionMain Board 3/3 System CONTROL/POWER Section Block Diagram System Control / Power SectionMain Board Side a Printed Wiring Board Main SectionMotor Flexible Board Waveforms Common note on Schematic DiagramIC B/D 184 R104,204 Except US model10k US model 33k IC1006 XC6371C271PR MZ-G750 IC501 SN761057DBTIC551 SC111257FCR2 IC303IC901 IC601IC302 TA2131FL IC301 AK5354VTExploded Views SectionPanel Section 56 @ Chassis Section109 103 117 119 120 118 105 106 108 107 115 121 MD Mechanism Deck Section MT-MZR700-172101 102 103 104 122 110 112 111Resistors Main Electrical Parts ListMain Short FET Filter Miscellaneous Revision History

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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