DOWNLOAD Sony MEX-DV900 / MEX-DV90EE Service Manual ↓ Size: 8.47 MB | Pages: 76 in PDF or view online for FREE

Laser: Semiconductor laser
Signal format system: PAL (Except E model)

PAL/NTSC Switchable 

 (E and Indian models)

Signal-to-noise ratio: 120 dB
Frequency response: 10 – 20,000 Hz
Wow and flutter: Below measurable limit
Harmonic distortion: 0.01 %

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: 531 – 1,602 kHz
LW: 153 – 279 kHz

Antenna (aerial) terminal: External antenna (aerial)

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)

Video output terminal
Rear audio output terminals
Power antenna (aerial) relay control terminal
Power amplifier control terminal

AUX audio input terminals
Antenna (aerial) input terminal
Parking break control terminal
AUX input jack (stereo mini jack)

AEP and UK models: 87.5 – 108.0 MHz
Russian model:
FM1/FM2: 87.5 – 108.0 MHz (at 50 kHz step)
FM3: 65 – 74 MHz (at 30 kHz step)
Asian model: 87.5 – 108.0 MHz (at 50 kHz step)
Latin American model:
87.5 – 107.9 MHz (at 200 kHz step)

Asian model:
531 – 1,602 kHz (at 9 kHz step)
Latin American model:
530 – 1,710 kHz (at 10 kHz step)

Antenna (aerial) terminal: External antenna (aerial)

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

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

Power requirements: 12 V DC car battery

(negative ground (earth))

Dimensions: Approx. 178

× 50 × 180 mm

(7

1

/

8

× 2 × 7

1

/

8

in) (w/h/d)

Mounting dimensions: Approx. 182

× 53 × 163 mm

(7

1

/

4

× 2

1

/

8

× 6

1

/

2

in) (w/h/d)

Mass: Approx.  1.4 kg (3 lb 2 oz)
Supplied accessories:

Card remote commander: RM-X168
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.

DivX, DivX Certified, and associated logos are
trademarks of DivX, Inc. and are used under
license.

US and foreign patents licensed from Dolby 
Laboratories.

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.

connector

connector

2009A05-1

© 

2009.01

Model Name Using Similar Mechanism

NEW

Mechanism Type

MG-612L-187

Optical Pick-up Name

KHS-360A

Photo: MEX-DV900

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 

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

This label is located on the bottom of the 

chassis.

This label is located on the drive unit’s internal 

chassis.

“DVD VIDEO,” “DVD-R,” “DVD-RW,” 
“DVD+R,” and “DVD+RW” are trademarks.

“DivX” and “DivX Certified” are 
registered trademarks or trademarks 
of DivX, Inc.

THIS PRODUCT IS LICENSED UNDER THE 
MPEG-4 VISUAL PATENT PORTFOLIO 
LICENSE FOR THE PERSONAL AND NON-
COMMERCIAL USE OF A CONSUMER FOR 
DECODING MPEG-4 VIDEO THAT WAS 
ENCODED BY A CONSUMER ENGAGED IN 
A PERSONAL AND NON-COMMERCIAL 
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

Manufactured under license 
from Dolby Laboratories.
“Dolby” and the double-D 

symbol are trademarks of Dolby Laboratories.

Microsoft, Windows Media, 
and the Windows logo are 
trademarks or registered 
trademarks of Microsoft 

Corporation in the United States and/or other 
countries.

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

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

3-1.   Disassembly Flow  ..........................................................   13
3-2.   Sub Panel Complete Assy ...............................................   13
3-3.   DVD Mechanism Deck Block ........................................   14
3-4.   DC Fan (25X25) (M901), MAIN Board  ........................   14
3-5.   SENSOR Board, Chassis (T612Z) Sub Assy ..................   15
3-6.   Chassis (OP, Z) Complete Assy ......................................   15
3-7.   SERVO Board  ................................................................   16

ELECTRICAL  CHECK 

 .........................................   17

5-1.  Block Diagram - SERVO/VIDEO Section - ...................   19
5-2.  Block Diagram - TUNER/AUDIO Section - ..................   20
5-3. Block 

Diagram 

 

- PANEL/POWER SUPPLY Section - ............................   21

5-4.  Schematic Diagram - SERVO Board (1/3) - ...................   23
5-5.  Schematic Diagram - SERVO Board (2/3) - ...................   24
5-6. Schematic 

Diagram 

 

- SERVO Board (3/3), SENSOR Board - .......................   25

5-7.  Printed Wiring Board - SERVO Board (Side A) - ..........   26
5-8. Printed 

Wiring 

Boards 

 

- SERVO Board (Side B), SENSOR Board - ..................   27

5-9.  Schematic Diagram - MAIN Board (1/2) - .....................   28
5-10.  Schematic Diagram - MAIN Board (2/2) - .....................   29
5-11.  Printed Wiring Board - MAIN Board - ...........................   30
5-12.  Printed Wiring Board - KEY Board -..............................   31
5-13.  Schematic Diagram - KEY Board - ................................   32

6-1. Main 

Section 

...................................................................  46

6-2.  Front Panel Section .........................................................   47
6-3.  DVD Mechanism Deck Section (MG-612L-187) ..........   48

  ..............................   49

Note: In this set, the SERVO board has been changed in the 

midway of production.

 

Printed wiring boards, schematic diagrams and electrical 
parts list of the SERVO board that have been described to 
this service manual are information before it is changed.

 

Refer to supplement-1 for the SERVO board after it chang-
es.

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.

NOTE  ON  LASER  DIODE  EMISSION  CHECK
The laser beam on this model is concentrated so as to be focused 
on the disc refl ective surface by the objective lens in tha optical 
pick-up block. Therefore, when checking the laser diode emission, 
observe from more than 30 cm away from the objective lens.

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.

NOTE  THE  IC4  ON  THE  SERVO  BOARD  
REPLACING
IC4 cannot exchange with single. When this part is damaged, ex-
change the entire mounted board.

NOTE  THE  IC503  ON  THE  MAIN  BOARD  
REPLACING
IC503 cannot exchange with single. When this part is damaged, 
exchange the entire mounted board.

PAL

2

3-283-924-0[]

DV900: AEP and UK models

PAL

3

3-283-920-0[]

DV900: E (PAL) model

NTSC

4

3-283-921-0[]

DV900: E (NTSC) model

PAL

5

3-283-922-0[]

DV900: Indian model

PAL

5

3-283-925-0[]

DV90EE: Russian model

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

•  Connect the MAIN board (CN101) and the SERVO board (CN3) with the extension cable (Part No. J-2502-062-1).