Sony MZ-R700 Pause KEY, MIC Sense, MIFVSS3, Set Key, Rec Key, Half Lock SW, Rmc Key, Avss, Vdiosc

Page 30

MZ-G750/R700

• IC801 CXD2671-204GA (SYSTEM CONTROLLER, DIGITAL SIGNAL PROCESSOR, 16M BIT D-RAM)

Pin No.

Pin Name

I/O

Description

 

 

 

 

 

1

PAUSE KEY

I

Set key input terminal (X key input)

 

 

 

 

 

 

2

MIC SENSE

O

Control signal output to the microphone amp

 

“H”: HIGH, “L”: LOW, normally: “H”

(Not used)

 

 

 

 

 

 

 

3

XTEST

I

Input terminal for the test mode set up “L”: test mode (normally fixed at “H”)

 

 

 

 

 

4, 5

NC

O

Not used (open)

 

 

 

 

 

6

MCUVDD0

—

Power supply terminal (for microcomputer block) (+1.5 V)

 

 

 

 

 

7

MIFVSS3

—

Ground terminal (for microcomputer I/F)

 

 

 

 

 

8

XRST

I

System reset signal input terminal from the power control (IC901) “L”: reset

 

 

 

 

9

S MON

I

Servo signal monitor input terminal (A/D input) from RF amp (IC501)

 

 

 

 

10

VB MON

I

Voltage monitor input terminal of UNREG power supply (A/D input)

 

 

 

 

11

CHG MON

I

Charge voltage monitor input terminal (A/D input) from XPC18A22FCR2 (IC601)

 

 

 

 

12

VREF MON

I

Clear reference voltage input terminal (A/D input) from RF amp (IC501)

 

 

 

 

 

13, 14

SET KEY 1,

I

Set key input terminal (A/D input)

 

SET KEY 2

 

 

 

 

 

 

 

 

 

15

VL MON

I

VL voltage monitor input terminal (A/D input) (G750 only)

 

 

 

 

16

HIDC MON

I

HIGH DC voltage monitor input terminal (A/D input)

 

 

 

 

17

WK DET

I

Set key start switching detection signal input terminal (A/D input)

 

 

 

 

 

18

REC KEY

I

REC key input terminal (A/D input)

 

 

 

 

 

19

HALF LOCK SW

I

Open button detection switch (S805) input terminal (A/D input)

“L”: when normal position, “H”: when locked

 

 

 

 

 

 

 

20

RMC KEY

I

Key input terminal (A/D input) of the remote commander attached headphone

 

 

 

 

21

AVDD

—

Power supply terminal (for the analog circuit block) (+2.8 V)

 

 

 

 

22

AVSS

—

Ground terminal (for the analog circuit block)

 

 

 

 

23

VDIOSC

—

Power supply terminal (for OSC cell) (+2.4 V)

 

 

 

 

 

24

OSCI

I

System clock (45.1584 MHz) input terminal

 

 

 

 

 

 

25

OSCO

O

System clock (45.1584 MHz) output terminal

 

 

 

 

 

 

26

VSIOSC

—

Ground terminal (for OSC cell)

 

 

 

 

 

27

DAVDD

—

Power supply terminal (for the built-in D/A converter) (+2.4 V)

 

 

 

 

28

VREFL

I

Reference voltage input terminal (for the internal D/A converter L-CH)

 

 

 

 

29

AOUTL

O

Built-in D/A converter (L-CH) output terminal

 

 

 

 

30

AOUTR

O

Built-in D/A converter (R-CH) output terminal

 

 

 

 

31

VREFR

I

Reference voltage input terminal (for the built-in D/A converter R-CH)

 

 

 

 

32

DAVSS

—

Ground terminal (for the built-in D/A converter)

 

 

 

 

 

33

ASYO

O

Playback EFM duplex signal output terminal

 

 

 

 

 

34

ASYI

I

Playback EFM comparison slice level input terminal

 

 

 

 

 

35

AVD1

—

Ground terminal (for the analog) (+2.4 V)

 

 

 

 

 

 

36

BIAS

I

Bias input for the playback EFM comparison

 

 

 

 

 

37

RFI

I

Playback EFM RF signal input from RF amp (IC501)

 

 

 

 

 

38

AVS1

—

Ground terminal (for the analog)

 

 

 

 

 

39

PCO

O

Phase comparison output for the master clock of playback EFM system master PLL

 

 

 

 

 

40

PDO

O

Phase comparison output for the analog PLL

Not used (open)

 

 

 

 

41

FILI

I

Filter input for the master clock of the playback EFM system master PLL

 

 

 

 

42

FILO

O

Filter output for the master clock of the playback EFM system master PLL

 

 

 

 

43

CLTV

I

Internal VCO control voltage input for the playback EFM system master PLL

 

 

 

 

44

PEAK

I

Peak hold signal input of the light amount signal (RF/ABCD) from RF amp (IC501)

 

 

 

 

45

BOTM

I

Bottom hold signal input of the light amount signal (RF/ABCD) from RF amp (IC501)

 

 

 

 

46

ABCD

I

Light amount signal (ABCD) input from RF amp (IC501)

 

 

 

 

47

FE

I

Focus error signal input from RF amp (IC501)

 

 

 

 

48

AUX1

I

Support signal (I3 signal/temperature signal) input terminal (A/D input)

 

 

 

 

 

49

VC

I

Middle point voltage (+1.2 V) input terminal

 

 

 

 

 

 

50

ADIO

O

Monitor output of A/D converter input signal

Not used (open)

 

 

 

 

51

ADRT

I

A/D converter the upper limit voltage input (fixed at “H” in this set)

 

 

 

 

 

30

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Contents Specifications MZ-G750/R700Flexible Circuit Board Repairing MZ-G750/R700Disassembly Table of ContentsElectrical Adjustments DiagramsSection Servicing Note Optical PICK-UP Flexible BoardSection General MZ-G750MZ-R700 Section Disassembly Panel ASSY, LowerPanel ASSY, Upper LCD Module Main BoardService ASSY, OP MD Mechanism DeckHolder Assy Motor Flexible BoardMOTOR, DC M602 MOTOR, DC M601, MOTOR, DC M603Section Test Mode 8888eVersion Ver 1.200 00 Transition method in Manual Mode Configuration of Test ModeManual Mode ManualSelf-Diagnosis Result Display Mode Setting Method Overall Adjustment ModeSelf-Diagnosis Result Display Mode LrefPw 1D 0Setting method of Reset the Error Display Code Reset the error display codeDescription of Error Indication Codes Description of Indication HistorySound Skip Check Result Display Mode Key Check ModeRPLAY SET OK Res OK? 0 Reset! 0ResNV CC 0 ResV5dat V1datV5num AssyLrefPw SetTmpLaser HrefPwConfiguration of overall adjustment Main Boardside aAdjustment Method of Overall CD and MO Adjustment Mode Overall Adjustment Mode Title DisplayElectrical Offset Adjusting Method OfstResClr Patch Data Rewriting When Nonvolatile Memory was ReplacedResume CC 0 PatClr CC 00D5900 Patch 00 00D581E 0D59B20D6500 0D62000D6204 0D65200D64F4 0D61200D6400 0D651C0D6D00 0D6C000D6CF6 0D6D1C0D7600 0D75000D751C 0D7603Section Diagrams IC PIN Function DescriptionMIFVSS3 Pause KEYMIC Sense SET KEYXtsl DSPVDD0DSPVSS0 LrckSlcv SldwSlcu SlcwSET CODE0 Open Close SWGND SW SET CODE2Flashvdd Xhold SWSycn REC 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 IC303 IC501 SN761057DBTIC551 SC111257FCR2 IC1006 XC6371C271PR MZ-G750IC601 IC901IC301 AK5354VT IC302 TA2131FLSection Exploded ViewsPanel Section Chassis Section 56 @122 110 112 111 MD Mechanism Deck Section MT-MZR700-172101 102 103 104 109 103 117 119 120 118 105 106 108 107 115 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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