CDX-MP40

Pin No.

 

Pin Name

I/O

Pin Description

 

 

 

 

 

 

 

 

 

 

 

67

 

 

 

MD2

—

CPU operation mode setting pin

 

 

 

 

 

 

 

 

 

 

 

68

 

 

 

 

 

 

 

 

I

Flash write selection signal input (“L”: flash write mode)

 

FL_BOOT

 

 

 

 

 

 

 

 

 

 

 

69

 

 

 

FL_W

O

Flash write control signal output connected to pin 66 (FWE)

 

 

 

 

 

 

 

 

 

 

 

70

 

 

 

NC

O

Not used. (Open)

 

 

 

 

 

 

 

 

 

 

 

71

 

CDMON

O

CD mechanism power supply control signal output

 

 

 

 

 

 

 

 

 

 

 

72

 

DECINT

I

Interrupt signal input from the DSP IC

 

 

 

 

 

 

 

 

 

 

 

73

 

 

CLOSE

O

Front panel operation request output (Close)

 

 

 

 

 

 

 

 

 

 

 

74

 

 

 

OPEN

O

Front panel oparation request output (Open)

 

 

 

 

 

 

 

 

 

 

 

75

 

LINKOFF

O

LINK OFF signal output for UNI_LINK “H”: link off, “L”: link on

 

 

 

 

 

 

 

 

 

 

 

76

 

UNI_SO

O

Sony-Bus serial data output to the bus interface

 

 

 

 

 

 

 

 

 

 

 

77

 

 

UNI_SI

I

Sony-Bus serial data input from the bus interface

 

 

 

 

 

 

 

 

 

 

 

78

 

UNI_CK

I

Sony-Bus serial clock input from the bus interface

 

 

 

 

 

 

 

 

 

 

 

79

 

 

 

NC

O

Not used. (Open)

 

 

 

 

 

 

 

 

 

 

 

80

 

 

 

SDA

I/O

I2C interface data input/output

 

 

 

 

 

 

 

 

 

 

 

81

 

 

 

SCL

O

I2C interface clock output

 

 

 

 

 

 

 

 

 

 

 

82

 

 

 

NC

O

Not used. (Open)

 

 

 

 

 

 

 

 

 

 

 

83

 

 

 

TSO

O

Serial data output to the servo IC

 

 

 

 

 

 

 

 

 

 

 

84

 

 

 

TSI

I

Serial data input from the servo IC

 

 

 

 

 

 

 

 

 

 

 

85

 

 

 

TSCK

O

Serial clock output to the servo IC

 

 

 

 

 

 

 

 

 

 

 

86

 

LEDDAT

O

LED data output for the jig

 

 

 

 

 

 

 

 

 

 

 

87

 

LEDCLK

O

LED clock output for the jig

 

 

 

 

 

 

 

 

 

 

 

88

 

LEDLAT

O

LED latch signal output for the jig

 

 

 

 

 

 

 

 

 

 

 

89, 90

 

 

 

NC

O

Not used. (Open)

 

 

 

 

 

 

 

 

 

 

 

91

 

 

 

 

 

 

 

I

Sony-Bus BUS ON signal input from the bus interface

 

 

BUSON

 

 

 

 

 

 

 

 

 

 

 

92

 

 

 

 

 

 

I

Back up power supply detection signal input

 

BUCHK

93

 

 

 

A-ATT

O

Audio muting control signal output

 

 

 

 

 

 

 

 

 

 

 

94

 

 

 

CDON

O

Power control signal output for the CD servo “H”: servo on, “L”: during loading

 

 

 

 

 

 

 

 

 

 

 

95

 

 

 

NC

O

Not used. (Open)

 

 

 

 

 

 

 

 

 

 

 

96

 

U/J_SEL

I

Destination setting pin

 

 

 

 

 

 

 

 

 

 

 

97

 

 

 

 

 

I

CD text function setting pin

 

TEXTSEL

98

 

 

 

NC

O

Not used. (Open)

 

 

 

 

 

 

 

 

 

 

 

99

 

 

 

 

 

I

Custom file function setting pin

 

 

CFSEL

100

DOUT SEL

I

Digital output selection setting pin “H”: digital output available

 

 

 

 

 

 

 

 

 

 

 

16

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Sony CDX-MP40 service manual Close
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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.
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