CDX-MP40

3-5. BLOCK DIAGRAM — DISPLAY SECTION —

 

 

 

 

 

 

 

 

 

 

 

 

 

IC901

 

 

 

 

 

 

 

LCD DRIVER

 

 

 

 

IC801 (2/2)

 

(US,Canadian MODEL)

 

 

 

 

SYSTEM CONTROL

 

(AEP,UK MODEL)

 

AEP,UK :S902,903,931,LSW901(1/2),904(1/2)-910(1/2)

 

5

KEY IN0

 

 

 

 

 

US,CND:S901,903,931,LSW901(1/2)-907(1/2)

 

 

 

 

 

 

FUNCTION SWITCH

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

S1

1

 

 

 

 

 

 

 

I

I

 

 

 

 

LCDSO 18

78 DATA

S64 64

 

 

 

 

LCDCKO 20

77 CLK

 

LCD901

AEP,UK :S911,LSW912(1/2)-922(1/2)

 

 

 

LCDCE 19

76 CE

 

LIQUID

 

 

 

 

CRYSTAL

US,CND:S902,LSW908(1/2)-917(1/2)

 

4

KEY IN1

 

 

 

 

 

 

 

 

 

DISPLAY

FUNCTION SWITCH

 

 

 

 

 

 

 

 

 

 

 

 

 

COM1 65

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

COM4 68

D809

 

 

 

 

 

 

 

 

Q803

26 KEY ACK

 

 

 

 

 

KEY

 

 

 

 

 

DETECT

 

 

 

 

 

 

 

 

 

91 XKEYON

DOOR

75

 

 

 

 

 

 

 

IND

 

 

 

LED930,931

D807

 

 

 

 

 

BATT

DOOR IND

 

 

 

 

 

 

SW

 

 

 

 

 

 

 

 

 

 

 

98

RC IN1

 

 

 

Q923,924

 

CNP801

 

 

 

 

 

 

 

6

RC IN0

 

 

 

 

 

(REMOTE IN)

 

 

 

 

 

 

 

 

 

 

 

Q919

 

ILL B+

 

 

 

 

ILLON 92

 

 

 

 

 

ILL ON

 

 

IC951(US,Canadian MODEL)

 

 

 

 

SWITCH

 

AEP,UK :LED933,934

 

 

 

 

 

 

US,CND:LED910,911

IC971(AEP,UK MODEL)

 

 

 

 

BATT

Q918

(LCDLIGHTBACK )

REMOTE

2

29 SIRCS

 

 

ILL B+

CONTROL

 

 

 

SWITCH

 

RECEIVER

 

 

 

 

 

 

 

AEP,UK :LED903,911,951-954,LSW901(2/2),

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

904(2/2)-910(2/2),912(2/2)-922(2/2)

 

 

34 NOSE SW

 

 

 

 

US,CND:LED901-906,LSW901(2/2)-917(2/2)

 

 

 

 

 

 

 

S802

 

 

 

 

 

 

 

KEY

(NOSE DET)

 

 

 

 

 

 

 

(ILLUMINATION)

 

 

15 XIN

OSC OUT 12

X801

 

 

X802

 

 

 

 

 

 

 

 

18.432MHz

 

32.768kHz

 

 

OSC IN

13

 

16 XOUT

 

 

 

 

 

 

 

 

 

 

THIS NOTE IS COMMON FOR PRINTED WIRING BOARDS AND SCHEMATIC DIAGRAMS.

(In addition to this, the necessary note is printed in each block.)

for schematic diagram:

All capacitors are in µF unless otherwise noted. pF: µµF 50 WV or less are not indicated except for electrolytics and tantalums.

All resistors are in and 1/4 W or less unless otherwise specified.

% : indicates tolerance.

f : internal component.

C : panel designation.

Note:

Note:

The components identi-

Les composants identifiés par

fied by mark 0 or dotted

une marque 0 sont critiques

line with mark 0 are criti-

pour la sécurité.

cal for safety.

Ne les remplacer que par une

Replace only with part

piéce portant le numéro

number specified.

spécifié.

 

 

A : B+ Line.

Power voltage is dc 14.4V and fed with regulated dc power supply from ACC and BATT cords.

Voltages are taken with a VOM (Input impedance 10 M). Voltage variations may be noted due to normal produc- tion tolerances.

Waveforms are taken with a oscilloscope.

Voltage variations may be noted due to normal produc- tion tolerances.

Circled numbers refer to waveforms.

Signal path.

F : FM

f : AM/MW/LW

J : CD

c : CD-R/RW (MP3)

for printed wiring boards:

X : parts extracted from the component side.

Y : parts extracted from the conductor side.

x : parts mounted on the conductor side.

a : Through hole.

: Pattern from the side which enables seeing. (The other layer’s patterns are not indicated.)

Caution:

Pattern face side: Parts on the pattern face side seen from the

(Side B) pattern face are indicated.

Parts face side: Parts on the parts face side seen from the

(Side A)

parts face are indicated.

• Waveforms

— SERVO Board —

(MODE: CD PLAY)

1

1V/DIV,20ns/DIV

 

59 ns

2.8 Vp-p

 

 

 

IC1 wd (XTAL)

 

2

500mV/DIV,1s/DIV

 

 

1.7 Vp-p

 

IC1 uj (RFO)

 

3

100mV/DIV,20s/DIV

 

Approx. 200m Vp-p

 

IC1 oa (FEO)

 

4

100mV/DIV,20s/DIV

 

Approx. 300m Vp-p

 

IC1 od (TEO)

 

5

1V/DIV,40ns/DIV

 

82 ns

1.2 Vp-p

 

 

 

IC3 yd (XTAL)

 

MAIN Board

6

 

2V/DIV,100ns/DIV

 

230 ns

5.5 Vp-p

 

 

 

IC601 4 (OSCD)

7

 

2V/DIV,40ns/DIV

 

54 ns

3.2 Vp-p

 

 

 

IC801 qs (OSCOUT)

8

 

2V/DIV,20s/DIV

 

30.5s

3.8 Vp-p

 

 

 

IC801 qh (XOUT)

23 23

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Image 23
Sony CDX-MP40 service manual Block Diagram Display Section, Waveforms Servo Board, Main Board

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.