• IC501 MASTER CONTROL (M30620ECFP-A21) (MAIN board)

Pin No.

 

Pin Name

I/O

 

Function

1

 

STK-POWER

O

 

Power amp ON/OFF signal output

 

 

 

 

 

 

 

2

 

P

O

 

Power ON/OFF signal output (Not used)

 

 

 

 

 

 

 

3

 

F-RY

O

 

Front speaker relay control output

 

 

 

 

 

 

 

4

 

R-RY

O

 

Rear speaker relay control output (Not used)

 

 

 

 

 

 

5

 

CD-POWER

O

CD power on signal output

 

 

 

 

 

 

 

6

 

 

 

O

 

Line mute ON/OFF signal output

 

TA-MUTE

 

 

 

 

 

 

 

 

7

 

DBFB-H

O

 

DBFB H/L select signal output (Not used)

 

 

 

 

 

 

 

8, 9

 

—

—

Not used

 

 

 

 

 

 

 

10

 

SUBXIN

I

 

X’tal (32.768kHz) input

 

 

 

 

 

 

 

11

 

SUBXOUT

O

 

X’tal (32.768kHz) output

 

 

 

 

 

 

 

12

 

RESET

I

 

Reset signal input

 

 

 

 

 

 

 

13

 

X-OUT

O

 

X’tal (16MHz) output

 

 

 

 

 

 

 

14

 

VSS

—

Ground

 

 

 

 

 

 

 

15

 

X-IN

I

 

X’tal (16MHz) input

 

 

 

 

 

 

 

16

 

VCC

—

Power supply (+5V)

 

 

 

 

 

 

 

17

 

NMI

I

 

Not used (PULL UP EVER+5V)

 

 

 

 

 

 

 

18

 

WAKE UP

I

 

WAKE UP (Fixed at fixed at “L”)

 

 

 

 

 

 

 

19

 

SCOR

I

 

Subcode data request signal output

 

 

 

 

 

 

 

20

 

RDS-INT

I

 

RDS data input

 

 

 

 

 

 

21

 

RDS-DATA

I

 

 

 

 

 

 

 

 

 

 

 

22

 

AC-CUT

I

 

AC power cut detection signal input

 

 

 

 

 

 

 

23

 

PL-CLK

O

 

Clock signal to pro-logic (Not used)

 

 

 

 

 

 

 

24

 

PL-DATA

O

 

Data signal to pro-logic (Not used)

 

 

 

 

 

 

 

25

 

PL-LAT

O

 

Latch signal to pro-logic (Not used)

 

 

 

 

 

 

 

26

 

TIMER LED

O

 

Timer LED ON/OFF (Not used)

 

 

 

 

 

 

 

27

 

PROTECTOR IN

I

 

Speaker protect signal input

 

 

 

 

 

 

 

28

 

MD-RESET

O

 

MD reset signal output

 

 

 

 

 

 

 

29

 

IIC-CLK

I/O

 

I2C bus CLK input/output

30

 

IIC-DATA

I/O

 

I2C bus DATA input/output

31

 

TXQ

—

Not used

 

 

 

 

 

 

 

32

 

SQ-DATA

I

 

Subcode Q data input

 

 

 

 

 

 

 

33

 

SQ-CLK

O

 

Subcode Q data output

 

 

 

 

 

 

 

34

 

FL-RESET

O

 

FL reset signal

 

 

 

 

 

 

 

35

 

FL-DATA

O

 

FL data output

 

 

 

 

 

 

 

36

 

FL-CHIP SELECT

O

 

FL chip select signal

 

 

 

 

 

 

 

37

 

FL-CLK

O

 

FL clock output

 

 

 

 

 

 

 

38

 

62-LAT

O

 

M62428AFP (IC301) latch signal output

 

 

 

 

 

 

 

39

 

ST-BY LED

O

 

Sub clock signal output (Test mode)

 

 

 

 

 

 

 

40, 41

 

V-CINE

O

 

Not used

 

 

 

 

 

 

 

42

 

FL-ON

O

 

FL switch ON

 

 

 

 

 

43

 

POWER-ON

O Stand by relay ON

 

 

 

 

 

 

 

44

 

B-FREQ

O

 

FREQ high/low signal for SYNC bass (Not used)

 

 

 

 

 

 

 

45

 

FUNC-SEL1

O

 

Function select signal output “L” : TAPE, “H” : LINE IN

 

 

 

 

 

 

 

46

 

OPT-SEL

O

 

Digital input select signal output

 

 

 

 

 

 

 

47

 

62-DATA

O

 

M62428AFP (IC301) data output

 

 

 

 

 

 

 

48

 

62-CLK

O

 

M62428AFP (IC301) clock output

 

 

 

 

 

 

 

49

 

ST-MUTE

O

 

ST mute signal output

 

 

 

 

 

 

 

75

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Image 75
Sony HCD-MD373 service manual IC501 Master Control M30620ECFP-A21 Main board
Page 74 Page 76

HCD-MD373 specifications

The Sony HCD-MD373 is a compact mini audio system that offers an impressive blend of sound quality, versatility, and advanced technology, making it an ideal choice for audio enthusiasts and casual listeners alike. One of the standout features of the HCD-MD373 is its MiniDisc recorder/player, a legacy technology that allows users to record high-quality audio onto MiniDiscs, providing an alternative to traditional CDs and cassettes. This feature is particularly appealing for those looking to capture live music or create personalized playlists.

Another notable aspect of the HCD-MD373 is its integrated CD player, which supports a variety of formats including CD, CD-R, and CD-RW. This versatility means that users can enjoy their favorite albums without the hassle of switching devices. The audio system also includes a built-in AM/FM tuner, enabling users to easily tune into their favorite radio stations and enjoy live broadcasts.

The HCD-MD373 is equipped with a powerful amplifier that delivers impressive sound output, complemented by its two-way speaker system. The speakers provide a rich audio experience with clear highs and deep lows, making it suitable for various music genres, from classical to contemporary. The system also features a bass boost function that enhances low-frequency sounds, allowing for a more immersive listening experience.

In terms of connectivity, the HCD-MD373 offers multiple inputs and outputs, including audio line-in, headphone jacks, and a digital optical output. These features make it easy to connect external devices such as MP3 players, smartphones, or even home theater systems. Additionally, the audio system supports various playback options, including shuffle and repeat modes, providing enhanced flexibility for users.

The design of the HCD-MD373 is sleek and modern, with a compact form factor that allows it to fit seamlessly into any living space. Its user-friendly interface, complete with an LCD display, makes it easy to navigate and control playback settings. Overall, the Sony HCD-MD373 is a testament to Sony's commitment to quality audio experiences, combining innovative features, robust technology, and elegant design into a single, powerful audio system. Whether enjoying a quiet evening at home or hosting a gathering with friends, the HCD-MD373 is sure to deliver satisfying sound and performance.
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