IC551

BD6602KUT

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

NC

NC VCC2

VCC1

H3PG1

FO3

FO3

H3VM

H3VM

 

RO3

RO3

 

H3PG2

 

CPUI

 

CPVI

CPWI

COM

 

 

 

48 47 46 45

44

43 42

41 40

 

39 38

 

37

 

36

 

35

34

33

 

H4PG2 49

 

 

 

 

 

 

 

 

 

 

 

 

 

+

+

+ –

 

 

RO4 50

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

VCC2

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

32

CPWO

 

 

 

 

 

 

 

 

PRE-DRIVE

 

 

 

 

 

 

 

 

 

 

31

CPVO

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

30

CPUO

H4VM 51

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

29

VMU

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

28

UO

FO4 52

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

H4PG1 53

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

27

GNDUV

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

RI4 54

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

26

VO

 

 

PRE-DRIVE

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

FI4 55

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

25

NC

PWM24 56

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

RI2 57

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

24

VMVW

 

 

PRE-DRIVE

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

FI2 58

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

23

WO

 

 

 

 

 

 

 

 

 

 

 

 

 

PRE-DRIVE

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

H2PG2 59

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

22

GNDW

RO2 60

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

21

NC

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

20

NC

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

VCC1

19

SGND

 

 

 

 

 

 

 

 

 

 

 

 

 

DECODER

 

 

 

 

18

ASGND

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

H2VM 61

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

TO

 

STANDBY

17 OE

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

EACH

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

BLOCK

 

 

VCC2

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

TO

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

BIAS

 

 

FO2 62

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

BEMF

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

COMPARATOR

 

 

 

H2PG1 63

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

FI3 64

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

PRE-DRIVE

 

 

 

 

 

 

 

 

 

 

 

 

 

1

2

3

4

5

 

6

7

8

9

 

10 11

12 13 14 15 16

 

 

 

 

 

RI3

FI1

RI1

VG

H1PG1

 

FO1

FO1

H1VM

H1VM

 

RO1

RO1

H1PG2

PWM

WI

VI UI

 

 

 

 

 

IC802

AK93C55AV-L

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

VREF

 

 

 

 

 

VPP

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

GENERATOR

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

XCS

1

 

 

 

 

 

 

 

 

 

 

 

 

VPP SW

 

 

8

VCC

 

 

INSTRUCTION

 

 

 

 

SK

2

DECODE

 

 

7

XBUSY

CONTROL

 

 

 

 

 

 

 

 

 

 

AND

ADD

 

 

 

 

 

CLOCK

DECODER

 

 

 

 

BUFFERS

 

 

 

 

GENERATION

 

 

 

 

 

 

 

 

 

DO

3

 

 

 

6

RST

 

 

 

 

 

EEPROM

 

DI

4

INSTRUCTION

 

R/W AMPS

5

GND

REGISTER

 

 

 

 

AND

 

 

 

 

 

 

 

 

 

 

 

DATA

AUTO ERASE

 

 

 

 

 

 

 

 

 

 

 

REGISTER

 

 

 

– 36 –

Page 26
Image 26
Sony MZ-E90 service manual IC551, IC802

MZ-E90 specifications

The Sony MZ-E90 is a notable portable mini-disc player, emblematic of early 2000s technology that revolutionized how music was consumed. Launched during a time when CDs and cassette tapes were dominant, the MZ-E90 provided a compact solution for digital audio playback, embodying Sony's commitment to audio quality and portability.

One of the standout features of the MZ-E90 is its ability to record audio in real-time. Users can easily create their own mini-discs by recording tracks directly from a CD, vinyl, or even from the radio. This flexibility allowed music enthusiasts to curate personalized playlists on a single medium, which was a significant advantage over traditional physical formats.

The player utilizes Sony's ATRAC (Adaptive TRAnsform Acoustic Coding) compression technology, which enables high-quality sound reproduction in a space-efficient manner. The MZ-E90 supports MDLP (MiniDisc Long Play) mode, allowing users to store multiple albums on a single disc. This capability enhanced its appeal, especially for those with extensive music collections.

In terms of design, the MZ-E90 is compact and lightweight, making it easy to transport. The player features a user-friendly interface, equipped with a backlit LCD display that shows track information and playback status. The controls are intuitive, allowing users to navigate through their music selections effortlessly.

Battery life is another crucial aspect of the MZ-E90, offering long playback hours thanks to its efficient power management. This aspect made it a preferable choice for those on the go, as it ensured that users could enjoy their music for extended periods without frequent recharging.

Moreover, the MZ-E90 includes a headphone jack for private listening and features an integrated bass boost function that augments low-frequency sounds, enhancing the listening experience for those who enjoy richer audio. The use of high-quality components further ensures that the sound reproduction does justice to the original recordings.

While the Sony MZ-E90 may not have the mainstream recognition of today’s streaming platforms, it played a pivotal role in advancing portable digital music technology. Its combination of recording capabilities, sound quality, and portability made it a cherished device for audiophiles and casual listeners alike during its production run. The legacy of such devices remains evident in the evolution of portable music, paving the way for modern digital audio players and streaming services.