SECTION 6

 

 

 

 

 

 

 

 

 

 

 

DIAGRAMS

 

 

6-1. IC PIN DESCRIPTION

 

 

 

 

6-1-1. IC801 RU6915MF-0006 (SYSTEM CONTROL)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Pin No.

 

 

Pin Name

I/O

 

Description

 

 

1

 

 

S MON

I

S-MON monitor signal input from the ∝ PD63732GC (IC601)

 

 

 

 

 

 

 

 

 

 

2

 

 

UREG MON

I

Un-regulator power supply voltage monitor input terminal (A/D input)

 

 

 

 

 

 

 

 

 

 

 

 

 

3

 

 

 

NC

—

Not used. (open)

 

 

 

 

 

 

 

 

 

 

 

 

 

4

 

 

 

VREF

I

Input terminal for power supply voltage adjustment reference voltage (+2 V) (A/D input)

 

 

 

 

 

 

 

 

 

 

 

 

 

5

 

 

DVDD MON

I

Not used. (Fixed at “H”.)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

6

 

 

 

NC

—

Not used. (open)

 

 

 

 

 

 

 

 

 

 

 

 

 

7

 

 

RMC KEY

I

Remote commander with headphone key input terminal (A/D input)

 

 

 

 

 

 

 

 

 

 

8

 

 

SET KEY

I

Set key input terminal (A/D input) S801 to S804 (x, >/N, ., +/– VOLUME keys input)

 

 

 

 

 

 

 

 

 

 

 

 

9

 

 

MRST

I

System reset signal input “L”: reset

 

 

 

 

For several hundreds msec. after the power supply rises, “L” is input, then it change to “H”

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

10

 

 

AVDD

—

Power supply pin (+2.4 V or +2.8 V)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

11

 

 

 

AVSS

—

Ground terminal (for A/D converter)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

12 – 15

 

 

TYPE0 – 3

I

Setting terminal for model discrimination (bit 0 to bit 3)

Fixed at “L” in this set

 

 

 

 

 

 

 

 

 

 

 

 

16

 

 

XOUT

O

Main system clock output terminal (16.9344 MHz)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

17

 

 

 

XIN

I

Main system clock input terminal (16.9344 MHz)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

18

 

 

SX OUT

O

Sub system clock output terminal

Not used. (open)

 

 

 

 

 

 

 

 

 

 

 

 

 

19

 

 

 

SXIN

I

Sub system clock input terminal Not used. (fixed at “L”)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

20

 

 

COUT

O

Not used. (open)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

21

 

 

 

VDD

—

Power supply terminal (+2 V) (digital system)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

22

 

 

 

VSS

—

Ground terminal (digital system)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

23

 

 

HOLD SW

I

HOLD switch (S808) input terminal

“L”: hold off, “H”: hold on

 

 

 

 

 

 

 

 

 

 

 

 

24

 

 

VG CON

O

Power supply control signal output to each ICs

 

 

 

 

 

 

 

 

 

 

 

 

 

25

 

 

XCLK

O

System clock supply output terminal (16.934 MHz) to the ∝

PD63732GC (IC601) or AK4352

 

 

(IC302)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

26

 

 

KEY EN

O

Ground control output terminal of remote control

 

 

 

 

 

 

 

 

 

 

 

 

 

 

27

 

 

AVLS SW

I

AVLS switch (S803) input terminal

“L”: LIMIT

“H”: NORM

 

 

 

 

 

 

 

 

 

 

 

28

 

 

DSP SINT

I

Interruption status input from the ∝ PD63732GC (IC601)

 

 

 

 

 

 

 

 

 

 

 

 

29, 30

 

DBB0, DBB1

I

DIGITAL MEGABASS switch (S806) input terminal *1

 

 

 

 

 

 

 

 

 

 

 

 

31

 

 

OPR LED

O

OPERATE LED (D802) drive signal output terminal

“H”: LED on

 

 

 

 

 

 

 

 

 

 

32

OPEN CLS SW

I

Upper panel open/close detect switch (S801) input terminal

“L”: upper panel close, “H” : upper panel open

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

33

 

 

 

 

 

 

 

I

Wake up signal input from remote control key

 

 

 

XWAKE RMC

 

 

 

 

 

 

 

 

 

 

 

 

 

 

34

 

 

 

 

 

 

I

Wake up signal input from this set key

 

 

 

 

XWAKE SET

 

 

 

 

 

 

 

 

 

 

 

 

 

 

35

 

 

SBUS CLK

O

SSB serial clock signal output terminal

 

 

 

 

 

 

 

 

 

 

 

 

 

 

36

 

 

SBUS DATA

I/O

SSB serial data input/output terminal

 

 

 

 

 

 

 

 

 

 

 

 

 

 

37

 

 

 

 

 

O

Reset signal output terminal to each ICs

 

 

 

 

 

XRST

 

 

 

 

 

 

 

 

 

 

 

 

38

 

 

SLD 1 MON

I

Sled servo timing signal input from the TLC372CPW (IC552)

 

 

 

 

 

 

 

 

 

 

39

 

 

SLD 2 MON

I

Sled servo timing signal input from the TLC372CPW (IC552)

 

 

 

 

 

 

 

 

 

 

 

 

 

40

 

 

 

VDD

—

Power supply terminal

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

41

 

 

 

VPP

—

Test terminal (fixed at “L”)

 

 

 

 

 

 

 

 

 

 

 

 

 

42

 

 

CLV VCON

O

Spindle servo drive voltage control signal output to the BD6602KUT (IC551) or ∝ PD63732GC

 

 

(IC601)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

43

 

 

APC REF

O

Laser power control signal output terminal

 

 

 

 

 

 

 

 

 

 

 

 

44

 

 

RM VCON

O

Remote control power voltage select signal output to power circuit “L”:2.4 V, “H”: 2.8 V

 

 

 

 

 

 

 

 

 

 

45

 

 

CLV U MON

I

Spindle servo (U) timing signal input from the BD6602KUT (IC551)

 

 

 

 

 

 

 

 

 

 

46

 

 

CLV V MON

I

Spindle servo (V) timing signal input from the BD6602KUT (IC551)

 

 

 

 

 

 

 

 

 

 

47

 

 

CLV W MON

I

Spindle servo (W) timing signal input from the BD6602KUT (IC551)

 

 

 

 

 

 

 

 

 

 

48

 

 

CLV U CON

I

Spindle servo (U) drive signal input from the BD6602KUT (IC551)

 

 

 

 

 

 

 

 

 

 

49

 

 

CLV V CON

I

Spindle servo (V) drive signal input from the BD6602KUT (IC551)

 

 

 

 

 

 

 

 

 

 

 

 

 

– 14 –

Page 13 Page 15
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Image 14
Sony MZ-E90 service manual Section Diagrams, IC PIN Description, 1. IC801 RU6915MF-0006 System Control, Pin No
Page 13 Page 15

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.
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