CDX-MP40

• IC801 MN101C49KSJ (SYSTEM CONTROL) (MAIN BOARD)

Pin No.

 

Pin Name

I/O

Pin Description

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

1

 

 

 

 

VREF–

—

Power supply pin for A/D converter

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

2

 

 

 

 

 

VSM

I

S-meter voltage detection signal input from the tuner unit (TU601)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

3

 

 

 

 

 

NIL

I

Not used. (Connected to ground.)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

4

 

 

KEYIN1

I

Key signal input

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

5

 

 

KEYIN0

I

Key signal input

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

6

 

 

 

RC_IN0

I

Rotary commander key signal input from the remote-in jack

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

7

 

QUALITY

I

Noise detection signal input (AEP, UK model)/Connected to ground. (US, Canadian model)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

8

 

DST SEL

I

Destination setting pin (US, Canadian model)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

9

 

 

 

 

 

NIL

I

Not used. (Connected to ground.)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

10

 

 

 

 

VREF+

—

Power supply pin for A/D converter

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

11

 

 

 

 

 

VDD

—

Power supply pin

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

12

 

OSCOUT

O

High speed clock output (18.43 MHz)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

13

 

 

 

 

 

OSCIN

I

High speed clock input (18.43 MHz)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

14

 

 

 

 

 

VSS

—

Ground pin

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

15

 

 

 

 

 

XIN

I

Low speed clock input (32.768 kHz)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

16

 

 

 

 

 

XOUT

O

Low speed clock output (32.768 kHz)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

17

 

 

 

MMOD

—

Memory mode selection input “L”: single chip mode (connected to ground)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

18

 

 

 

LCDSO

O

Serial data output to the LCD driver

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

19

 

 

 

LCDCE

O

Chip enable signal output to the LCD driver

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

20

 

LCDCKO

O

Serial clock output to the LCD driver

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

21 – 23

 

 

 

 

 

NCO

O

Not used. (Open)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

24

 

 

 

 

 

 

 

 

 

 

 

 

O

System reset signal output

 

 

SYSRST

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

25

 

 

 

 

 

 

 

 

 

 

 

O

Bus on signal output to the bus interface

 

 

 

BUSON

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

26

 

KEYACK

I

Key acknowledge detection signal input

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

27

DAVN (NIL)

I

RDS data block sync detection signal input (AEP, UK model)/Connected to

ground. (US, Canadian model)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

28

 

 

 

 

 

BU_IN

I

Back up power supply detection signal input

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

29

 

 

 

 

 

SIRCS

I

Remote control signal input from the remote control receiver

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

30

 

TUATT IN

I

ATT control signal input from tuner unit.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

31

 

 

 

 

 

NIL

I

Not used. (Connected to ground.)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

32

 

 

 

 

 

NIH

I

Not used. (Connected to power supply.)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

33

 

 

 

 

 

 

 

 

 

 

I

Microcomputer reset signal input from the reset IC

 

 

 

 

RESET

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

34

 

 

 

I

Front panel with/without detection signal input “L”: panel with

 

NOSE SW

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

35

 

 

 

 

 

BEEP

O

Beep signal output to the power amplifier

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

36

 

 

 

 

 

NCO

O

Not used. (Open)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

37

 

 

 

 

 

 

 

 

I

Test mode detection signal input

 

 

 

TESTIN

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

38

 

 

 

 

 

 

 

 

I

Accessory power supply detection signal input

 

 

 

 

ACCIN

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

39

 

 

 

 

 

NCO

O

Not used. (Open)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

40

 

 

TELATT

I

TEL ATT detection signal input

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

41

 

 

 

 

 

NIH

I

Fixed at “H”.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

42

 

 

 

BUSSO

O

Sony_Bus serial data output to the bus interface IC

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

43

 

 

 

 

 

BUSSI

I

Sony_Bus serial data input from the bus interface IC

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

44

 

BUSCKO

O

Sony_Bus serial clock output to the bus interface IC

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

45

 

 

 

 

I2CSIO

I/O

I2C bus serial data input/output

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

46

 

 

 

 

 

NCO

O

Not used. (Open)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

47

 

 

I2CCKO

O

I2C bus serial clock output

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

48

 

 

 

 

 

NCO

O

Not used. (Open)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

49

 

 

 

 

 

NCO

O

Not used. (Open)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

50

 

POW_ON

O

System power supply control signal output

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

51 – 66

 

 

 

 

 

NCO

O

Not used. (Open)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

67

 

 

 

 

 

ATT

O

System ATT control signal output

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

68

 

 

 

 

 

NCO

O

Not used. (Open)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

18

Page 17 Page 19
Page 18
Image 18
Sony CDX-MP40 service manual IC801 MN101C49KSJ System Control Main Board
Page 17 Page 19

CDX-MP40 specifications

The Sony CDX-MP40 is a versatile car audio receiver designed to enhance the in-car listening experience. Known for its combination of modern features and reliable performance, this model has gained popularity among music enthusiasts who value both functionality and sound quality.

At the core of the CDX-MP40 is its CD playback capability, allowing drivers to enjoy their favorite albums on the go. The device is compatible with CD-Rs and CD-RWs, ensuring a wide range of playback options. In addition to traditional CDs, the CDX-MP40 stands out with its MP3 playback capability, enabling users to load hundreds of tracks onto a single disc. This eliminates the clutter of multiple CDs, making music access more convenient during long drives.

One of the key features of the CDX-MP40 is its front auxiliary input, which allows for seamless connection of external devices such as smartphones and MP3 players. This connectivity expands the range of audio sources available to users and makes it easy to stream music from various devices. Moreover, the receiver offers an option for optional USB connectivity, providing even more versatility for music playback.

The CDX-MP40 also benefits from advanced technologies to improve sound quality. With 52 watts of peak power per channel, this unit delivers robust audio performance that can fill any car with rich sound. The built-in EQ (equalizer) presets allow users to customize their audio settings based on musical preferences, while the additional power output ensures that even at high volumes, the sound remains clear and undistorted.

Safety and usability are also prioritized in the design of the CDX-MP40. The user interface is straightforward, featuring a large, easy-to-read display and intuitive controls, making it user-friendly for drivers. The electronic skip protection feature minimizes playback interruptions, ensuring a smooth listening experience even on bumpy roads.

In summary, the Sony CDX-MP40 is a well-rounded car audio solution, equipped with essential features such as CD and MP3 playback, auxiliary input, and USB connectivity. With powerful audio performance and user-friendly controls, it caters to a wide array of audio preferences, making it an excellent choice for anyone looking to upgrade their in-car entertainment system. Its blend of modern technology and classic functions establishes the CDX-MP40 as a reliable option for car audio enthusiasts.
Top Page Image Contents