Sony MZ-R700 service manual SetTmp, Laser, LrefPw, HrefPw, WritPw

Page 20

MZ-G750/R700

1.Connect a digital voltmeter to the TP902 (VL) on the MAIN board, and adjust [VOL +] key (voltage up) or [VOL --]key (voltage down) so that the voltage becomes 2.30 ± 0.01 V.

digital

voltmeter

MAIN board

TP902(VL)

TP912(GND)

2.When press the X key to write the adjusted value, LCD dis- plays as follows and power supply manual adjustment has com- pleted.

This set LCD display

ADJ OK

0 00

Adjustment and Connection Location: MAIN board

5-6. Temperature Correction

• Adjustment Method of temperature correction

1.Select the manual mode of test mode, and set the mode num- ber 014 (see page 13).

This set LCD display

SetTmp

0 14

:Adjusted value

2.Measure the ambient temperature.

3.Adjust with [VOL +], [VOL --]key so that the adjusted value

(hexadecimal value) becomes the ambient temperature. (Initial value: 14h = 20 ° C, Adjusting range: 80h to 7fh (–128

°C to +127 ° C)

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

5-7. Laser Power Check

Connection :

laser

power meter

Optical pick-up objective lens

digital voltmeter

MAIN board

TP(+)

TP(–)

Checking Method :

1.Select the manual mode of test mode (see page 13), and set the laser power adjusting mode (item number 010).

This set LCD display

Laser

0 10

2.Press the . key continuously until the optical pick-up moves to the most inward track.

3.Open the cover and set the laser power meter on the objective lens of the optical pick-up.

4.Press the N key, and set the laser MO read adjustment mode (item number 011).

This set LCD display

LrefPw

0 11

:Adjusted value

5.Check that the laser power meter reading is 0.81 ± 0.08 mW.

6.Check that the voltage both ends (TP (+) and TP (–)) of resistor R521 at this time is below 44 mV.

7.Press the N key, and set the laser CD read adjustment mode (item number 012).

This set LCD display

HrefPw

0 12

:Adjusted value

8.Check that the laser power meter reading is 0.97 ± 0.10 mW.

9.Check that the voltage both ends (TP (+) and TP (–)) of resistor R521 at this time is below 44 mV.

10.Press the N key, and set the laser MO write adjustment mode (item number 013).

This set LCD display

WritPw

0 13

:Adjusted value

11.Check that the laser power meter reading is 4.95 ± 0.50 mW.

12.Check that the voltage both ends (TP (+) and TP (–)) of resistor R521 at this time is below 80 mV.

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

Checking and Connection Location: MAIN board

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Contents Specifications MZ-G750/R700Flexible Circuit Board Repairing MZ-G750/R700Table of Contents Electrical AdjustmentsDisassembly DiagramsSection Servicing Note Optical PICK-UP Flexible BoardSection General MZ-G750MZ-R700 Panel ASSY, Upper Section DisassemblyPanel ASSY, Lower LCD Module Main BoardService ASSY, OP MD Mechanism DeckHolder Assy Motor Flexible BoardMOTOR, DC M602 MOTOR, DC M601, MOTOR, DC M603Version Ver 1.200 00 Section Test Mode8888e Configuration of Test Mode Manual ModeTransition method in Manual Mode ManualOverall Adjustment Mode Self-Diagnosis Result Display ModeSelf-Diagnosis Result Display Mode Setting Method LrefPw 1D 0Reset the error display code Description of Error Indication CodesSetting method of Reset the Error Display Code Description of Indication HistoryRPLAY Sound Skip Check Result Display ModeKey Check Mode SET OK Reset! 0 ResNV CC 0Res OK? 0 ResV1dat V5numV5dat AssySetTmp LaserLrefPw HrefPwConfiguration of overall adjustment Main Boardside aOverall Adjustment Mode Title Display Electrical Offset Adjusting MethodAdjustment Method of Overall CD and MO Adjustment Mode OfstPatch Data Rewriting When Nonvolatile Memory was Replaced Resume CC 0ResClr PatClr CC 0Patch 00 0 0D581E0D5900 0D59B20D6200 0D62040D6500 0D65200D6120 0D64000D64F4 0D651C0D6C00 0D6CF60D6D00 0D6D1C0D7500 0D751C0D7600 0D7603Section Diagrams IC PIN Function DescriptionPause KEY MIC SenseMIFVSS3 SET KEYDSPVDD0 DSPVSS0Xtsl LrckSldw SlcuSlcv SlcwOpen Close SW GND SWSET CODE0 SET CODE2Xhold SW Sycn RECFlashvdd FlashvssBlock Diagram Servo Section BoardBlock Diagram Audio Section Main BoardBlock Diagram System Control / Power Section Main Board 3/3 System CONTROL/POWER SectionPrinted Wiring Board Main Section Main Board Side aMotor Flexible Board Common note on Schematic Diagram WaveformsIC B/D 184 R104,204 Except US model10k US model 33k IC501 SN761057DBT IC551 SC111257FCR2IC303 IC1006 XC6371C271PR MZ-G750IC601 IC901IC301 AK5354VT IC302 TA2131FLPanel Section SectionExploded Views Chassis Section 56 @MD Mechanism Deck Section MT-MZR700-172 101 102 103 104122 110 112 111 109 103 117 119 120 118 105 106 108 107 115 121Main Electrical Parts List ResistorsMain 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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