Sony MZ-R700 service manual Section Servicing Note, Optical PICK-UP Flexible Board

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MZ-G750/R700

SECTION 1

SERVICING NOTE

NOTES ON HANDLING THE OPTICAL PICK-UP BLOCK OR BASE UNIT

The laser diode in the optical pick-up block may suffer electro- static break-down because of the potential difference generated by the charged electrostatic load, etc. on clothing and the human body.

During repair, pay attention to electrostatic break-down and also use the procedure in the printed matter which is included in the repair parts.

The flexible board is easily damaged and should be handled with care.

NOTES ON LASER DIODE EMISSION CHECK

Never look into the laser diode emission from right above when checking it for adjustment. It is feared that you will lose your sight.

NOTES ON HANDLING THE OPTICAL PICK-UP BLOCK (LCX-4R)

The laser diode in the optical pick-up block may suffer electro- static break-down easily. When handling it, perform soldering bridge to the laser-tap on the flexible board. Also perform mea- sures against electrostatic break-down sufficiently before the op- eration. The flexible board is easily damaged and should be handled with care.

laser-tap

OPTICAL PICK-UP FLEXIBLE BOARD

•In performing the repair with the power supplied to the set, removing the MAIN board causes the set to be disabled.

In such a case, fix a convex part of the open/close detect switch (S806 on MAIN board) with a tape in advance.

Handle the FLEXIBLE board (overwrite head) with care, as it has been soldered directly to the MAIN board.

In repairing the component side of MAIN board, connect the FLEXIBLE board (overwrite head) and the MAIN board with the lead wires in advance. (See page 8)

FLEXIBLE board (Over write head)

panel assy, upper

Tape

S806

MAIN board

•Replacement of CDX2671-204GA (IC801) used in this set requires a special tool.

•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, change the adjusted values following the Change of Adjusted Values immediately after the NV was reset. (See page 18)

•If the nonvolatile memory was replaced on the set, the modified program data must be written to the nonvolatile memory. In such a case, write the modified data that meets the microcomputer version following the patch data rewriting procedure at the replacement of nonvolatile memory. (See page 23)

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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, Lower Section DisassemblyPanel ASSY, Upper LCD Module Main BoardService ASSY, OP MD Mechanism DeckHolder Assy Motor Flexible BoardMOTOR, DC M602 MOTOR, DC M601, MOTOR, DC M6038888e Section Test ModeVersion Ver 1.200 00 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 HistoryKey Check Mode Sound Skip Check Result Display ModeRPLAY 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 TA2131FLExploded Views SectionPanel Section 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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