CDX-MP40

Pin No.

 

Pin Name

I/O

Pin Description

 

 

 

 

 

 

 

 

 

 

 

 

69

 

 

 

TU ON

O

Tuner power supply control signal output

 

 

 

 

 

 

 

 

 

 

 

 

70

 

 

 

 

 

 

 

 

 

O

Electronic volume ATT control signal output to the electronic volume

 

 

VOLATT

 

 

 

 

 

 

 

 

 

 

 

 

71

 

 

 

NCO

O

Not used. (Open)

 

 

 

 

 

 

 

 

 

 

 

 

72

 

 

AMPON

O

Power amplifier standby control signal output to the power amplifier

 

 

 

 

 

 

 

 

 

 

 

 

73

 

 

 

NCO

O

Not used. (Open)

 

 

 

 

 

 

 

 

 

 

 

 

74

 

 

AMPATT

O

Power amplifier ATT control signal output to the power amplifier

 

 

 

 

 

 

 

 

 

 

 

 

75

DOORIND

O

Sub panel power supply control signal output

 

 

 

 

 

 

 

 

 

 

 

 

76 – 84

 

 

 

NCO

O

Not used. (Open)

 

 

 

 

 

 

 

 

 

 

 

 

85

 

NS MASK

O

Noise mask signal output

 

 

 

 

 

 

 

 

 

 

 

 

86

 

 

EE_CKO

O

EEPROM serial clock output

 

 

 

 

 

 

 

 

 

 

 

 

87

 

 

 

EE_SIO

I/O

EEPROM serial data input/output

 

 

 

 

 

 

 

 

 

 

 

 

88

 

 

 

TUATT

O

Tuner ATT signal output to the tuner unit

 

 

 

 

 

 

 

 

 

 

 

 

89, 90

 

 

 

NCO

O

Not used. (Open)

 

 

 

 

 

 

 

 

 

 

 

 

91

 

 

 

 

 

 

 

O

Power supply control signal to the function key

 

XKEYON

 

 

 

 

 

 

 

 

 

 

 

 

92

 

 

 

ILL ON

O

Illumination power supply control signal output

 

 

 

 

 

 

 

 

 

 

 

 

93

 

 

 

NCO

O

Not used. (Open)

 

 

 

 

 

 

 

 

 

 

 

 

94

 

 

 

 

 

 

I

Front panel open/close detection signal input “L”: close, “H”: open

 

DOORSW

95

 

 

 

DAVSS

Ground pin for D/A converter

 

 

 

 

 

 

 

 

 

 

 

 

96

 

 

 

NCO

O

Not used. (Open)

 

 

 

 

 

 

 

 

 

 

 

 

97

 

 

 

 

 

I

Flash write detection signal input

 

FLASH W

98

 

 

 

 

 

I

Remote commander shift key signal input from the remote-in jack “L”: shift key on

 

 

 

RC_IN1

99

 

 

 

NCO

O

Not used. (Connected to ground.)

 

 

 

 

 

 

 

 

 

 

 

 

100

 

 

 

DAVDD

Power supply pin for D/A converter

 

 

 

 

 

 

 

 

 

 

 

 

19

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Image 19
Sony CDX-MP40 service manual Nco

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.