CDX-MP40 - Sony Car Audio Service Manual (repair manual)

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Model Name Using Similar Mechanism

NEW

CD Drive Mechanism Type

MG-393MC-121

Optical Pick-up Name

KSS-721A

US Model

Canadian Model

AEP Model

UK Model

POWER OUTPUT AND TOTAL HARMONIC DISTORTION
23.2 watts per channel minimum continuous average power into
4 ohms, 4 channels driven from 20 Hz to 20 kHz with no more
than 5% total harmonic distortion.

Signal-to-noise ratio

90 dB

Frequency response

10 – 20,000 Hz

Wow and flutter

Below measurable limit

Tuning range

87.5 – 107.9 MHz (US, Canadian Model)
87.5 – 108.0 MHz (AEP, UK Model)

Antenna terminal

External antenna connector

Intermediate frequency 10.7 MHz/450 kHz
Usable sensitivity

9 dBf

Selectivity

75 dB at 400 kHz

Signal-to-noise ratio

67 dB (stereo),
69 dB (mono)

Harmonic distortion at 1 kHz

0.5% (stereo),
0.3% (mono)

Separation

35 dB at 1 kHz

Frequency response

30 – 15,000 Hz

(US, Canadian Model)

Tuning range

530 – 1,710 kHz

Antenna terminal

External antenna connector

Intermediate frequency 10.7 MHz/450 kHz
Sensitivity

30 µV

(AEP, UK Model)

Tuning range

MW : 531 – 1,602 kHz
LW : 153 – 279 kHz

Aerial terminal

External aerial connector

Intermediate frequency 10.7 MHz/450 kHz
Sensitivity

MW : 30 µV
LW : 40 µV

Outputs

Speaker outputs
(sure seal connectors)

Speaker impedance

4 – 8 ohms

Maximum power output 52 W 

× 4 (at 4 ohms) (US, Canadian Model)

50 W 

× 4 (at 4 ohms) (AEP, UK Model)

Outputs

Audio outputs (front/rear)
Power antenna relay control terminal
Power amplifier control terminal

Inputs

Telephone ATT control terminal
BUS control input terminal
BUS audio input terminal
Remote controller input terminal
Antenna input terminal

Tone controls

Low: ±10 dB at 60 Hz (XPLOD)
Mid: ±10 dB at 1 kHz (XPLOD)
High: ±10 dB at 10 kHz (XPLOD)

• The tuner and CD sections have no adjustments.

2003E04-1

© 2003. 05

– Continued on next page –

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optical pick-up block

semi-fixed resistor

If the optical pick-up block is defective, please replace the whole
optical pick-up block.
Never turn the semi-fixed resistor located at the side of optical
pick-up block.

Use of controls or adjustments or performance of procedures
other than those specified herein may result in hazardous
radiation exposure.

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0

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Power requirements

12 V DC car battery
(negative ground)

Dimensions

Approx. 178 

× 50 × 180 mm

(7 

1/8

 

× 2 × 7 

1/8

 in.) (w/h/d)

Mounting dimensions

Approx. 182 

× 53 × 161 mm

(7 

1/4

 

× 2 

1/8

 

× 6 

3/8

 

in.) (w/h/d)

Mass

Approx. 1.2 kg
(2 lb. 10 oz.)

Supplied accessories

Parts for installation and connections
Front panel case (1)
Card remote commander RM-X115

This unit cannot be connected to a digital preamplifier or an equalizer
which is Sony BUS system compatible.

The laser diode in the optical pick-up block may suffer electrostatic
breakdown because of the potential difference generated by the
charged electrostatic load, etc. on clothing and the human body.
During repair, pay attention to electrostatic breakdown and also use
the procedure in the printed matter which is included in the repair
parts.
The flexible board is easily damaged and should be handled with
care.

The laser beam on this model is concentrated so as to be focused on
the disc reflective surface by the objective lens in the optical pick-
up block. Therefore, when checking the laser diode emission, ob-
serve from more than 30 cm away from the objective lens.

• Never reuse a disconnected chip component.
• Notice that the minus side of a tantalum capacitor may be dam-

aged by heat.

This set can playback CD-R and CD-ROM discs. The following
test discs should be used to check the capability:

CD-R test disc TCD-R082LMT (Part No. J-2502-063-1)
CD-RW test disc TCD-W082L (Part No. J-2502-063-2)

• US, Canadian model

• AEP, UK model

This label is located on the bottom of the chassis.

This label is located on the drive unit’s internal chassis.

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This unit can play the following discs:

Type of discs

Label on the disc

Audio CD

MP3 files

• Some CD-Rs/CD-RWs (depending on the equipment used for

its recording or the condition of the disc) may not play on this
unit.

• You cannot play a CD-R/CD-RW that is not finalized∗.
• You can play MP3 files recorded on CD-ROMs, CD-Rs, and

CD-RWs.

• A CD-R/CD-RW to which a session can be added can be played.

∗ A process necessary for a recorded CD-R/CD-RW disc to be

played on the audio CD player.

When repairing or servicing this set, connect the jig (extension cable)
as shown below.

• Connect the MAIN board (CNP701) and the SERVO board (CN1)

with the extension cable (Part No. J-2502-062-1).

MAIN BOARD CNP701

SERVO BOARD CN1

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Location of Controls (US, Canadian Model) .......................... 5
Location of Controls (AEP, UK Model) .................................. 5
Connections (US, Canadian Model) ........................................ 6
Connections (AEP, UK Model) ............................................... 7

2-1.   Sub Panel Assy (CD) ........................................................... 9
2-2.   CD Mechanism Block ....................................................... 10
2-3.   Main Board ....................................................................... 10
2-4.   Heat Sink ........................................................................... 11
2-5.   Chassis (T) Sub Assy ........................................................ 11
2-6.   Lever Section ..................................................................... 12
2-7.   Servo Board ....................................................................... 12
2-8.   Shaft Roller Assy, Load Sw Board .................................... 13
2-9.   Floating Block Assy .......................................................... 14
2-10. Optical Pick-up Block ....................................................... 14

3-1.   IC Pin Descriptions ........................................................... 15
3-2.   Circuit Boards Location .................................................... 20
3-3.   Block Diagram –CD Section– ........................................... 21
3-4.   Block Diagram –Main Section– ........................................ 22
3-5.   Block Diagram –Display Section– .................................... 23
3-6.   Printed Wiring Boards –CD Mechanism Section– ............ 24
3-7.   Schematic Diagram –CD Mechanism Section (1/2)– ....... 26
3-8.   Schematic Diagram –CD Mechanism Section (2/2)– ....... 27
3-9.   Printed Wiring Boards –Main Section– ............................ 28
3-10. Schematic Diagram –Main Section (1/2)– ........................ 29
3-11. Schematic Diagram –Main Section (2/2)– ........................ 30
3-12. Printed Wiring Board –Relay Section– ............................. 31
3-13. Printed Wiring Board –Key Section

(US, Canadian Model)– ............... 32

3-14. Schematic Diagram –Relay, Key Section

(US, Canadian Model)– .................. 33

3-15. Printed Wiring Board –Key Section

(AEP, UK Model)– ...................... 34

3-16. Schematic Diagram –Relay, Key Section

(AEP, UK Model)– ......................... 35

3-17. IC Block Diagrams ............................................................ 36

4-1.   Chassis Section ................................................................. 38
4-2.   Front Panel Section ........................................................... 39
4-3.   CD Mechanism Section (1) ............................................... 40
4-4.   CD Mechanism Section (2) ............................................... 41
4-5.   CD Mechanism Section (3) ............................................... 42

........................................ 43