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2008D05-1

© 

2008.04

Model Name Using Similar Mechanism

CDX-GT470U/GT470US/
GT620U

Mechanism Type

MG-101I-188//Q

Optical Pick-up Name

DAX-25A

– Continued on next page –

“ATRAC”, “ATRAC AD”, SonicStage and their logos are trademarks of Sony Corporation.

“WALKMAN” and “WALKMAN” logo are registered trademarks of Sony Corporation.

The Bluetooth word mark and logos are owned by the Bluetooth SIG, Inc. and any use of such marks 
by Sony Corporation is under license. Other trademarks and trade names are those of their respective 
owners.

Microsoft, Windows Media, and the Windows logo are trademarks or registered
trademarks of Microsoft Corporation in the United States and/or other countries.

U.S. and foreign patents licensed from Dolby Laboratories.

Signal-to-noise ratio: 120 dB
Frequency response: 10 – 20,000 Hz
Wow and flutter: Below measurable limit

FM
Tuning range: 87.5 – 107.9 MHz
Antenna (aerial) terminal:

External antenna (aerial) 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)

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.

CEA2006 Standard
Power Output: 17 Watts RMS 

× 4 at 

4 Ohms < 1% THD+N
SN Ratio: 82 dBA
(reference: 1 Watt into 4 Ohms)

Separation: 35 dB at 1 kHz
Frequency response: 30 – 15,000 Hz
AM
Tuning range: 530 – 1,710 kHz
Antenna (aerial) terminal:

External antenna (aerial) connector

Intermediate frequency: 10.7 MHz/450 kHz
Sensitivity: 30 μV

Interface: USB (Full-speed)
Maximum current: 500 mA

Bluetooth Standard version 2.0

Bluetooth Standard Power Class 2 (Max. +4 dBm)

Line of sight approx. 10 m (33 ft)*

1

2.4 GHz band (2.4000 – 2.4835 GHz)

Modulation method: FHSS
Compatible Bluetooth Profiles*

2

A2DP (Advanced Audio Distribution Profile)
AVRCP (Audio Video Remote Control Profile)
HFP (Handsfree Profile) 1.5
HSP (Headset Profile)

*1 The actual range will vary depending on factors

*2 Bluetooth standard profiles indicate the purpose of

Output: Speaker outputs (sure seal connectors)
Speaker impedance: 4 – 8 ohms
Maximum power output: 52 W

× 4 (at 4 ohms)

FM
Tuning range: 87.5 – 108.0 MHz
Antenna (aerial) terminal:

External antenna (aerial) 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
MW/LW
Tuning range:

MW: 531 – 1,602 kHz
LW: 153 – 279 kHz

External antenna (aerial) connector

Intermediate frequency: 10.7 MHz/450 kHz
Sensitivity: MW: 30 μV, LW: 40 μV

87.5 – 108.0 MHz (at 50 kHz step)
87.5 – 107.9 MHz (at 200 kHz step)

FM tuning interval: 50 kHz/200 kHz switchable
Antenna (aerial) terminal:

External antenna (aerial) 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
MW
Tuning range:

531 – 1,602 kHz (at 9 kHz step)
530 – 1,710 kHz (at 10 kHz step)

MW tuning interval: 9 kHz/10 kHz switchable
Antenna (aerial) terminal:

External antenna (aerial) connector

Intermediate frequency: 10.7 MHz/450 kHz
Sensitivity: 30 μV

SW1: 2,940 – 7,735 kHz
SW2: 9,500 – 18,135 kHz
(except for 10,140 – 11,575 kHz)

External antenna (aerial) connector

Intermediate frequency: 10.7 MHz/450 kHz
Sensitivity: 30 μV

87.5 – 108.0 MHz (at 50 kHz step)

External antenna (aerial) 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
MW
Tuning range:

531 – 1,602 kHz (at 9 kHz step)

External antenna (aerial) connector

Intermediate frequency: 10.7 MHz/450 kHz
Sensitivity: 30 μV
SW
Tuning range:

SW1: 2,940 – 7,735 kHz
SW2: 9,500 – 18,135 kHz
(except for 10,140 – 11,575 kHz)

External antenna (aerial) connector

Intermediate frequency: 10.7 MHz/450 kHz
Sensitivity: 30 μV

Notes on chip component replacement
• 

Never reuse a disconnected chip component.

• 

Notice that the minus side of a tantalum capacitor may be dam-
aged by heat.

Flexible Circuit Board Repairing
• 

Keep the temperature of soldering iron around 270 °C during 
repairing.

• 

Do not touch the soldering iron on the same conductor of the 
circuit board (within 3 times).

• 

Be careful not to apply force on the conductor when soldering 
or unsoldering.

COMPONENTS  IDENTIFIED  BY  MARK 0 OR  DOTTED  LINE  
WITH  MARK 0 ON  THE  SCHEMATIC  DIAGRAMS  AND  IN  
THE  PARTS  LIST  ARE  CRITICAL  TO  SAFE  OPERATION.
REPLACE  THESE  COMPONENTS  WITH  SONY  PARTS 

LES  COMPOSANTS  IDENTIFIÉS  PAR  UNE  MARQUE  0 SUR  
LES  DIAGRAMMES  SCHÉMATIQUES  ET  LA  LISTE  DES  
PIÈCES  SONT  CRITIQUES  POUR  LA  SÉCURITÉ  DE  FONC-
TIONNEMENT.  NE  REMPLACER  CES  COM-  POSANTS  QUE  
PAR  DES  PIÈCES  SONY  DONT  LES  NUMÉROS  SONT  DON-
NÉS  DANS  CE  MANUEL  OU  DANS  LES  SUPPLÉMENTS  
PUBLIÉS  PAR  SONY.

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

• Canadian model:
CAUTION
The use of optical instruments with this 
product will increase eye hazard.

This product is classified as a CLASS

• Except Canadian model:

1 LASER PRODUCT.
This label is located on the bottom of the

chassis.

Audio outputs terminal (front/rear)

Subwoofer output terminal (mono)

Power antenna (aerial) relay control terminal

Power amplifier control terminal

Telephone ATT control terminal

Remote controller input terminal

Antenna (aerial) input terminal

AUX input jack (stereo mini jack)

Low: ±10 dB at 60 Hz (XPLOD)

Mid: ±10 dB at 1 kHz (XPLOD)

High: ±10 dB at 10 kHz (XPLOD)

Power requirements: 12 V DC car battery

(negative ground (earth))

Dimensions: Approx. 178

× 50 × 179 mm

(7

1

/

8

× 2 × 7

1

/

8

in) (w/h/d)

Mounting dimensions: Approx. 182

× 53 × 162 mm

(7

1

/

4

× 2

1

/

8

× 6

1

/

2

in) (w/h/d)

Mass: Approx. 1.2 kg (2 lb 11 oz)
Supplied accessories:

Card remote commander: RM-X304

Parts for installation and connections (1 set)

Your dealer may not handle some of the above listed

accessories. Please ask the dealer for detailed

information.

MPEG Layer-3 audio coding technology and 

patents licensed from Fraunhofer IIS and Thomson.

This product is protected by certain intellectual 

property rights of Microsoft Corporation. Use or 

distribution of such technology outside of this 

product is prohibited without a license from 

Microsoft or an authorized Microsoft subsidiary.

Content providers are using the digital rights 

management technology for Windows Media 

contained in this device (“WM-DRM”) to protect 

the integrity of their content (“Secure Content”) so 

that their intellectual property, including copyright,

in such content is not misappropriated.

This device uses WM-DRM software to play 

Secure Content (“WM-DRM Software”). If the 

security of the WM-DRM Software in this device

has been compromised, owners of Secure Content 

(“Secure Content Owners”) may request that 

Microsoft revoke the WM-DRM Software’s right 

to acquire new licenses to copy, display and/or 

play Secure Content. Revocation does not alter the 

WM-DRM Software’s ability to play unprotected 

content. A list of revoked WM-DRM Software is 

sent to your device whenever you download a 

license for Secure Content from the Internet or 

from a PC. Microsoft may, in conjunction with 

such license, also download revocation lists onto 

your device on behalf of Secure Content Owners.

  .............................................   4

  ..................................................................   7

3-1.   Disassembly Flow  ..........................................................   14
3-2.   Cover ...............................................................................   14
3-3.   CD Mechanism Deck Block (MG-101I-188//Q) ............   15
3-4.   ANTENNA Board  ..........................................................   15
3-5.   MAIN Board ...................................................................   16
3-6.   SERVO Board .................................................................   16
3-7.   Chassis (T) Sub Assy  .....................................................   17
3-8.   Roller Arm Assy ..............................................................   17
3-9.   Chassis (OP) Assy  ..........................................................   18
3-10.  Chucking Arm Sub Assy .................................................   18
3-11.  Sled Motor Assy  .............................................................   19
3-12.  Optical Pick-Up Section .................................................   20
3-13.  OP Service Assy (DAX-25A)  ........................................   20

DIAGNOSIS  FUNCTION 

 .....................................   21

5-1.  Printed Wiring Boards - MAIN Section - .......................   26
5-2.  Schematic Diagram - MAIN Section (1/3) - ...................   27
5-3.  Schematic Diagram - MAIN Section (2/3) - ...................   28
5-4.  Schematic Diagram - MAIN Section (3/3) - ...................   29
5-5.  Printed Wiring Boards - KEY Section - ..........................   30
5-6.  Schematic Diagram - KEY Section - ..............................   31

6-1. Main 

Section 

...................................................................  36

6-2.  Front Panel Section .........................................................   37
6-3.  CD Mechanism Deck Section (MG-101I-188//Q) ..........   38

  ..............................   39

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

NOTES  ON  LASER  DIODE  EMISSION  CHECK
Never look into the laser diode emission from right above when 
checking it for adjustment. It is feared that you will lose your 
sight.

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

UNLEADED  SOLDER
Boards requiring use of unleaded solder are printed with the lead-
free mark (LF) indicating the solder contains no lead.
(Caution: Some printed circuit boards may not come printed with 

the lead free mark due to their particular size)

Unleaded solder has the following characteristics.
•  Unleaded solder melts at a temperature about 40 °C higher 

than ordinary solder.

 

Ordinary soldering irons can be used but the iron tip has to be 
applied to the solder joint for a slightly longer time.

 

Soldering irons using a temperature regulator should be set to 
about 350 °C.
Caution:  The printed pattern (copper foil) may peel away if the 

heated tip is applied for too long, so be careful!

• Strong 

viscosity

 

Unleaded solder is more viscous (sticky, less prone to fl ow) 
than ordinary solder so use caution not to let solder bridges 
occur such as on IC pins, etc.

•  Usable with ordinary solder
 

It is best to use only unleaded solder but unleaded solder may 
also be added to ordinary solder.

TEST  DISCS
Use following TEST DISC when this set confi rms the operation 
and checks it.

3-702-101-01 

YEDS-18 (for CD)

4-225-203-01 

PATD-012 (for CD)

J-2502-063-1 

TCD-R082LMT (for CD-R)

EXTENSION  CABLE  AND  SERVICE  POSITION
When repairing or servicing this set, connect the jig (extension 
cable) as shown below.

•  Connect the MAIN board (CN350) and the SERVO board 

(CN401) with the extension cable (Part No. J-2502-076-1).