CMT-DX400, CMT-DX400A, HCD-DX400 - Sony Audio Service Manual (repair manual). Page 2

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 

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.

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

This appliance is classifi ed as 
a CLASS 1 LASER product.
This marking is located on the 
rear exterior.

 ..............................................   3

2-1. Disassembly 

Flow 

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

2-2. Cover 

(Top) 

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

2-3.  Front Panel Block ...........................................................   8
2-4. Knob 

(Volume) 

...............................................................   8

2-5. DVD 

Block 

.....................................................................   9

2-6. MAIN 

Board 

...................................................................  10

2-7. FFC 

Holder 

.....................................................................  10

2-8.  Optical Pick-up Block (KHM-313CAA) ........................   11
2-9. Belt 

..................................................................................  11

3-1. Block 

Diagram 

................................................................  12

3-2.  Printed Wiring Board - MAIN Board - ...........................   13
3-3.  Schematic Diagram - MAIN Board (1/2) (DX400) - .....   14
3-4.  Schematic Diagram - MAIN Board (2/2) (DX400) - .....   15
3-5.  Schematic Diagram - MAIN Board (1/2) (DX400A) - ...   16
3-6.  Schematic Diagram - MAIN Board (2/2) (DX400A) - ...   17
3-7.  Printed Wiring Board - CONTROL Board - ...................   18
3-8.  Schematic Diagram - CONTROL Board - ......................   19

4-1. Cover 

Section 

..................................................................  25

4-2.  Front Panel Section .........................................................   26
4-3.  MAIN Board Section ......................................................   27
4-4. Chassis 

Section 

...............................................................  28

4-5.  DVD Mechanism Deck Section ......................................   29

•  This system incorporates Dolby* Digital.
  * Manufactured under license from Dolby Laboratories.
    “Dolby” and the double-D symbol are trademarks of Dolby Laboratories.
•  MPEG Layer-3 audio coding technology and patents licensed from Fraunhofer IIS 

and Thomson.

• DivX

®

, DivX Certifi ed

®

 and associated logos are registered trademarks of DivX, 

Inc. DivX grants licensees the right to use the DivX trademark.

  ABOUT DIVX VIDEO: DivX

®

 is a digital video format created by DivX, Inc. 

This is an offi cial DivX Certifi ed device that plays DivX video.

  Visit www.divx.com for more information and software tools to convert your fi les 

into DivX video.

  ABOUT DIVX VIDEO-ON-DEMAND: This DivX Certifi ed

®

 device must be 

registered in order to play DivX Video-on-Demand (VOD) content. To generate 
the registration code, locate the DivX VOD section in the device setup menu. Go 
to vod.divx.com with this code to complete the registration process and learn more 
about DivX VOD.

•  Windows Media is either a registered trademark or trademark of Microsoft Corpo-

ration in the United States and/or other countries.

•  This product contains technology subject to certain intellectual property rights of 

Microsoft. Use or distribution of this technology outside of this product is prohib-
ited without the appropriate license(s) from Microsoft.

•  ABOUT MPEG-4 VISUAL: THIS PRODUCT IS LICENSED UNDER THE 

MPEG-4 VISUAL PATENT PORTFOLIO LICENSE FOR THE PERSONAL 
AND NONCOMMERCIAL USE OF A CONSUMER FOR DECODING VIDEO 
IN COMPLIANCE WITH THE MPEG-4 VISUAL STANDARD (“MPEG-4 VID-
EO”) THAT WAS ENCODED BY A CONSUMER ENGAGED IN A PERSONAL 
AND ONCOMMERCIAL ACTIVITY AND/OR WAS OBTAINED FROM A 
VIDEO PROVIDER LICENSED BY MPEG LA TO PROVIDE MPEG-4 VIDEO.

  NO LICENSE IS GRANTED OR SHALL BE IMPLIED FOR ANY OTHER 

USE. ADDITIONAL INFORMATION INCLUDING THAT RELATING TO 
PROMOTIONAL, INTERNAL AND COMMERCIAL USES AND LICENSING 
MAY BE OBTAINED FROM MPEG LA, LLC. SEE http://www.mpegla.com/

•  All other trademarks and registered trademarks are of their respective holders.
  In this manual, ™ and ® marks are not specifi ed.

General
Power requirements
Chilean and Peruvian models:
 

110 V – 120 V/220 V – 240 V AC, 50/60Hz, Adjutable with 
voltage selector

Mexican model: 

120 V AC, 60 Hz

Taiwan model: 

120 V AC, 50/60 Hz

Korean model: 

220 V – 240 V -, 60 Hz

Other models: 

220 V – 240 V AC, 50/60 Hz

Power consumption:
On: 25 

watts

Standby: 0.5 

watts

Dimensions (w/h/d) (excl. speakers):
 

Approx. 175 × 240 × 210 mm

Mass (excl. speakers): 2.4 kg

Design and specifi cations are subject to change without notice.