SECTION 6

DIAGRAMS

6-1. EXPLANATION OF IC TERMINALS IC503 DIGITAL SERVO, ATRAC (CXD2652AR)

Pin No.

Pin name

I/O

 

Description

 

 

 

 

 

1

MNT 0

O

 

Traverse count signal output.

 

 

 

 

 

2

MNT 1

O

 

Track jump detect output.

 

 

 

 

 

3

MNT 2

–

 

Not used (Open).

 

 

 

 

 

4

MNT 3

–

 

Not used (Open).

 

 

 

 

 

5

SWDT

I

 

Inputs write data signal from system controller (IC801).

 

 

 

 

 

6

SCLK

I

 

Inputs serial clock signal from system controller (IC801).

 

 

 

 

 

7

XLAT

I

 

Inputs serial latch signal from system controller (IC801).

 

 

 

 

 

8

SRDT

O

 

Outputs write data signal to system controller (IC801).

 

 

 

 

 

9

SENS

O

 

Outputs internal status (SENSE) to system controller (IC801).

 

 

 

 

 

10

XRST

I

 

Inputs reset signal from system controller (IC801). Reset : L

 

 

 

 

 

11

SQSY

O

 

Output subcode Q sync (SCOR) to system controller (IC801).

 

Outputs “L” every 13.3msec. Outputs “H” at all most mostly.

 

 

 

 

 

 

 

 

 

12

DQSY

O

 

Outputs digital-in U-bit CD format subcode Q sync (SCOR) to system controller (IC801).

 

Outputs “L” every 13.3msec. Outputs “H” at all most mostly.

 

 

 

 

 

 

 

 

 

13

WRPWR

I

 

Inputs laser power switching signal from system controller (IC801).

 

 

 

 

 

14

NC

–

 

Not used (Open).

 

 

 

 

 

15

TX

I

 

Input of write data taransmission timing from system controller (IC801).

 

Also used as magnetic field head ON/OFF output.

 

 

 

 

 

 

 

 

 

16

OSC1

O

 

Clock output (22.5MHz).

 

 

 

 

 

17

OSC0

I

 

Clock input (22.5MHz).

 

 

 

 

 

18

XTSL

–

 

Not used (Fixed at “L”)

 

 

 

 

 

19

NC

–

 

Not used (Ground).

 

 

 

 

 

20

RVSS

–

 

Connect to ground.

 

 

 

 

 

21

DIN

I

 

Digital audio signal input pin (For optical input).

 

 

 

 

 

22

NC

–

 

Not used (Open).

 

 

 

 

 

23

ADDT

I

 

Audio data input from A/D converter (IC303).

 

 

 

 

 

24

DATA

O

 

Monitor/decode audio data output to A/D converter (IC303).

 

 

 

 

 

25

ALRCK

O

 

L/R clock output to D/A converter (IC303).

 

 

 

 

 

26

ABCK

O

 

Bit clock signal output to A/D, D/A converter (IC303).

 

 

 

 

 

27

FS256

O

 

11.2896MHz clock output (MCLK).

 

 

 

 

 

28

DVDD

–

 

Power supply (+2.8V) for digital.

 

 

 

 

 

29 – 39

A00 – A08, A10, A11

O

 

Address signal output to RAM (IC509).

 

 

 

 

 

40

DVSS

–

 

Ground terminal.

 

 

 

 

 

41

XOE

O

 

Output enable contol signal output to RAM (IC509).

 

 

 

 

 

42

XCAS

O

 

Column address strobe singal output to RAM (IC509).

 

 

 

 

 

43

A09

O

 

Address signal output to RAM (IC509).

 

 

 

 

 

44

XRAS

O

 

Row address strobe signal output to RAM (IC509).

 

 

 

 

 

45

XWE

O

 

Read/write control signal output to RAM (IC509).

 

 

 

 

 

46 – 49

D0 – D3

I

 

Data signal input from RAM (IC509).

 

 

 

 

 

50

MVCI

–

 

Not used (Connect to ground).

 

 

 

 

 

51

ASYO

O

 

Playback EFM full-swing output (L : VSS, H : VDD).

 

 

 

 

 

52

ASYI

I

 

Playback EFM asymmetry comparate voltage input.

 

 

 

 

 

53

AVDD

–

 

Power supply (+2.8V) for analog.

 

 

 

 

 

54

BIAS

I

 

Playback EFM asymmetry circuit constant current input.

 

 

 

 

 

55

RFI

I

 

Inputs playback EFM RF signal from RF amplifier (IC501).

 

 

 

 

 

– 35 –

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Image 35
Sony MZ-R50 service manual Section Diagrams, Pin No Pin name Description
Page 34 Page 36

MZ-R50 specifications

The Sony MZ-R50, launched in the late 1990s, is a notable model in the MiniDisc player genre, which revolutionized how consumers listened to music. Part of Sony's first generation of MiniDisc recorders, the MZ-R50 quickly gained popularity for its sleek design and innovative features.

One of the standout features of the MZ-R50 is its compact size and lightweight construction. It weighs just 160 grams, making it one of the most portable audio devices of its time. This portability paired with a stylish aesthetic allowed users to carry their music with ease, appealing to young, active lifestyles.

The MZ-R50 utilizes MiniDisc technology, which employs a small, flat disc encased in a protective shell. This format offers superior sound quality compared to cassette tapes, allowing for digital recording and playback. Users can record audio directly onto the disc in real-time or transfer music from CDs with ease. The player supports several recording modes, including LP2 and LP4, which allow users to maximize recording time without sacrificing quality.

Another significant feature of the MZ-R50 is its impressive battery life. It can run for up to 10 hours on a single charge, enabling long listening sessions without frequent recharging. The device also includes a digital pitch control, allowing users to change the tempo of tracks without affecting the pitch, which is especially useful for musicians and DJs.

Moreover, the MZ-R50 incorporates Sony's ATRAC (Adaptive Transform Acoustic Coding) compression technology. This advanced algorithm was designed to reduce the file size of audio while maintaining high sound fidelity, ensuring that music stored on MiniDiscs sounded close to the original recording. The player is compatible with both standard and long-play MiniDiscs, providing flexibility for users who want to store more music on a single disc.

In terms of connectivity, the MZ-R50 features an optical input for high-quality digital recording from other devices, along with a headphone output and a line out option for connecting to external speakers or audio systems. Its user-friendly interface allows for easy navigation through tracks and playlists, making it accessible for users of all ages.

Overall, the Sony MZ-R50 remains a beloved piece of audio technology, reflecting a unique combination of portability, sound quality, and user-friendly features, establishing its place in the history of personal music players. Its legacy continues to inspire later generations of audio enthusiasts.
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