MEX-V50DT - Sony Car Audio Service Manual (repair manual)

mex-v50dt service manual
Model
MEX-V50DT
Pages
10
Size
1.04 MB
Type
PDF
Document
Service Manual
Brand
Device
Car Audio
File
mex-v50dt.pdf
Date

Read Sony MEX-V50DT Service Manual online

SERVICE MANUAL
Sony Corporation
Published by Sony Techno Create Corporation
9-893-294-01
2011I33-1
© 
2011.09
Ver. 1.0  2011.09
SPECIFICATIONS
MULTIMEDIA AV RECEIVER
Brazilian Model
Model Name Using Similar Mechanism
MEX-V30
Mechanism Type
DL-C28DB2-YG2
MEX-V50DT
Monitor section
Display type: Wide LCD color monitor
Dimensions: 3.0 in
System: TFT active matrix
Number of pixels: 
76,800 pixels (320 × 240)
Color system:
PAL/NTSC/automatic select
Tuner section
FM
Tuning range: 87.5 – 107.9 MHz
Antenna (aerial) terminal: 
External antenna (aerial) connector
Intermediate frequency: 150 kHz
Usable sensitivity: 12 dBf
Selectivity: 20 dB at 400 kHz
Signal-to-noise ratio: 55 dB (mono)
Separation: 30 dB at 1 kHz
Frequency response: 20 – 15,000 Hz
AM
Tuning range: 530 – 1,710 kHz
Antenna (aerial) terminal: 
External antenna (aerial) connector
Intermediate frequency: 450 kHz
Sensitivity: 26 μV
DVD/CD Player section
Signal-to-noise ratio: 120 dB
Frequency response: 20 – 20,000 Hz
Wow and flutter: Below measurable limit
Harmonic distortion: 0.03%
Region code: Labeled on the bottom of the unit
USB Player section
Interface: USB (Full-speed)
Maximum current: 500 mA
One-Seg TV section
Channel Range: UHF 14 ch - 69 ch
Power amplifier section
Outputs: Speaker outputs
Speaker impedance: 4 – 8 ohms
Potência de saída
26 W RMS x4 - 4 ohms, 1 kHz, 10 % THD*, 14,4 V
medição com um canal ativo
General
Outputs: 
Video output terminal (rear)
Audio output terminals (front)
Audio output terminals (rear/sub)
Power antenna (aerial) relay control terminal
Power amplifier control terminal
Inputs: 
Antenna (aerial) input terminal
Parking break control terminal
Camera input terminal
AUX audio input terminals (front/rear)
AUX video input terminal
USB signal input connector
One-Seg TV antenna (aerial) input terminal
Power requirements: 12 V DC car battery 
(negative ground (earth))
Dimensions: Approx. 178 
× 50 × 191.5 mm (w/h/d)
Mounting dimensions: Approx. 182 
× 53 × 165 mm 
(w/h/d)
Mass: Approx. 1.7 kg
Supplied accessories: 
Remote Commander: RM-X171
Parts for installation and connections (1 set)
One-Seg TV antenna (aerial)
Your dealer may not handle some of the above listed 
accessories. Please ask the dealer for detailed 
information.
Design and specifications are subject to change 
without notice.
Weights and dimensions are approximate.
Region code
The region system is used to protect software 
copyrights.
The region code is located on the bottom of the unit, 
and only DVDs labeled with an identical region code 
can be played on this unit.
DVDs labeled 
 can also be played.
If you try to play any other DVD, the message 
“Playback prohibited by region code.” will appear on 
the monitor screen. Depending on the DVD, no region 
code may be labeled even though playing the DVD is 
prohibited by area restrictions.
ALL
MEX-V50DT
2
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.
SAFETY-RELATED  COMPONENT  WARNING!
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 
 
WHOSE  PART  NUMBERS  APPEAR  AS  SHOWN  IN  THIS  
MANUAL  OR  IN  SUPPLEMENTS  PUBLISHED  BY  SONY.
CAUTION
Use of controls or adjustments or performance of procedures 
other than those specifi ed herein may result in hazardous radia-
tion exposure.
This label is located on the bottom of the 
chassis.
SECTION  1
SERVICING  NOTES
The laser diode in the optical pick-up block may suffer electro-
static 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.
  NOTES  ON  HANDLING  THE  OPTICAL  PICK-UP 
BLOCK  OR  BASE  UNIT
NOTE  FOR  THE  28-PIN  CONNECTOR
Do not use alcohol to clean the 28-pin connector connecting the 
front panel with the main body.
Do not touch the connector directly with your bare hand. Poor con-
tact may be caused.
Main unit
Back of the front 
panel
ABOUT  THE  REPAIRING  OF  BOARD
When electric parts installed by this unit are defective, replace the 
complete mouted board. Individual electrical parts that the mount 
is done cannot be exchanged.
NOTE  FOR  TRANSPORTATION 
When this unit is transported, it is necessary to install two transpor-
tation screws. Please transport it after installing two transportation 
screws as shown in the fi gure below.
Part No. 
Description
A-1844-216-A  SCREW WITH WARNING LABEL
ATENCAO!!!
Warning label
u1
Transportation screw
u2
ATENCAO!!!
warning label
transportation screw
transportation screw
Manufactured under license 
from Dolby Laboratories.
Dolby and the double-D symbol 
are trademarks of Dolby Laboratories.
Windows Media is either a registered trademark or 
trademark of Microsoft Corporation 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 prohibited without the appropriate 
license(s) from Microsoft.
US and foreign patents licensed from Dolby 
Laboratories.
MPEG Layer-3 audio coding technology and 
patents licensed from Fraunhofer IIS and Thomson.
“DVD VIDEO,” “DVD-R,” “DVD-RW,” “DVD+R,” 
and “DVD+RW” are trademarks.
This product uses font data which is licensed to 
Sony by Monotype Imaging Inc. or its affiliates.
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
All other trademarks are trademarks of their 
respective owners.
This label is located on the drive unit’s internal 
chassis.
MEX-V50DT
3
SECTION  2
GENERAL
This section is extracted 
from instruction manual.
Cautions
Run all ground (earth) leads to a common ground 
(earth) point.
This unit is designed for negative ground (earth) 12 V 
DC operation only.
Do not disassemble or modify the unit.
Do not install in locations which interfere with airbag 
operation.
Do not get the leads under a screw, or caught in moving 
parts (e.g. seat railing).
Before making connections, turn the car ignition off to 
avoid short circuits.
Connect the yellow and red power supply leads only 
after all other leads have been connected.
Be sure to insulate any loose unconnected leads with 
electrical tape for safety.
Do not press on the LCD when installing the unit.
Install the unit with the monitor facing straight forward; 
do not install it at a slanted angle.
Notes on the power supply lead (yellow)
When connecting this unit in combination with other 
stereo components, the amperage rating of the car 
circuit to which the unit is connected must be higher 
than the sum of each component's fuse amperage rating.
If no car circuits are rated high enough, connect the unit 
directly to the battery.
Connection example  
Notes (
-A)
Be sure to connect the ground (earth) lead before connecting the amplifier.
The alarm will only sound if the built-in amplifier is used.
Note (
-B)
You cannot use multiple auxiliary devices simultaneously, even if they are 
connected to different terminals.
Connection diagram  
To AMP REMOTE IN of an optional power 
amplifier
This connection is only for amplifiers. Connecting any other system 
may damage the unit.
To the car's reverse lamp cord for an optional rear 
view camera
To the parking brake switch cord
To an auxiliary device such as a portable media 
player, game console, etc. (not supplied)
Tip
You can use an RCA cord (not supplied) to connect auxiliary devices.
Warning
If you have a power antenna (aerial) without a relay box, 
connecting this unit with the supplied power supply 
connection cable 
 may damage the antenna (aerial).
Notes on the control and power supply leads
The power antenna (aerial) control lead (blue) supplies +12 V DC when 
you turn on the tuner.
If your car has a built-in FM/AM antenna (aerial) in the rear/side glass, 
connect the power antenna (aerial) control lead (blue) or the accessory 
power supply lead (red) to the power terminal of the antenna (aerial) 
booster. For details, consult your car dealer.
A power antenna (aerial) without a relay box cannot be used with this unit.
Memory hold connection
When the yellow power supply lead is connected, power will always be 
supplied to the memory circuit even when the ignition switch is turned off.
Notes on speaker connection
Before connecting the speakers, turn the unit off.
Use speakers with an impedance of 4 to 8 ohms, and with adequate 
power handling capacities to avoid damage.
Do not connect the speaker terminals to the car chassis, or connect the 
terminals of the right speakers with those of the left speakers.
Do not connect the ground (earth) lead of this unit to the negative (–) 
terminal of a speaker.
Do not attempt to connect the speakers in parallel.
Connect only passive speakers. Connecting active speakers (with 
built-in amplifiers) to the speaker terminals may damage the unit.
To avoid a malfunction, do not use the built-in speaker leads installed in 
your car if they feature a common negative (–) lead for the right and left 
speakers.
Do not connect the unit’s speaker leads to each other.
REAR/SUB
AUDIO OUT
FRONT
AUDIO OUT
REAR
VIDEO OUT
A
B
CAMERA IN
AUX
AUDIO IN
AUX
VIDEO IN
*not supplied
Video camera*
REAR VIDEO OUT
AUX VIDEO IN
AUX AUDIO IN
CAMERA IN
REAR/SUB
AUDIO OUT
FRONT
AUDIO OUT
*
1
  For details on connecting to the parking brake switch cord, see 
“Connecting the parking brake lead 
( )” on the reverse side.
*
RCA pin cord (not supplied)
*
Remove the cap from the antenna jack before connecting. For 
details on installing the One-Seg TV antenna (aerial), see “Installing 
the One-Seg TV antenna (aerial) 
( )” on the reverse side.
Blue/white striped
AMP REM
Max. supply current: 0.3 A
PARKING BRAKE
REVERSE IN
From car antenna (aerial)
Fuse (10 A)
For details, see “Power connection diagram” on the reverse side.
Light green
Purple/white striped
Positions 1, 2, and 3 do not have pins.
4
Yellow
Continuous power supply
5
Blue
Power antenna (aerial) control
6
Orange
Switched illumination power supply
7
Red
Switched power supply
8
Black
Ground (earth)
Negative polarity positions 2, 4, 6, and 8 have striped leads.
1
Purple
+
Speaker, rear, right
2
Speaker, rear, right
3
Gray
+
Speaker, front, right
4
Speaker, front, right
5
White
+
Speaker, front, left
6
Speaker, front, left
7
Green
+
Speaker, rear, left
8
Speaker, rear, left
*
2
*
2
*
2
*
2
*
1
*
2
From the car’s speaker connector
From the car’s power connector
*
3
MEX-V50DT
4
Precautions
Choose the installation location carefully so that the 
unit will not interfere with normal driving operations.
Avoid installing the unit in areas subject to dust, dirt, 
excessive vibration, or high temperature, such as in 
direct sunlight or near heater ducts.
Use only the supplied mounting hardware for a safe and 
secure installation.
Mounting angle adjustment
Adjust the mounting angle to less than 30°.
Connecting the parking brake 
lead  
Be sure to connect the parking brake lead (light green) of 
the power supply connection cable 
 to the parking 
brake switch cord. The mounting position of the parking 
brake switch cord depends on your car. Consult your car 
dealer or your nearest Sony dealer for further details.
Installing the One-Seg TV 
antenna (aerial)  
To enjoy One-Seg TV, you need to install the One-Seg TV 
antenna (aerial). Choose the installation location for best 
reception.
Screw the One-Seg antenna (aerial) elements 
b
 
to the antenna (aerial) base 
a
.
Remove the adhesive seal of the antenna (aerial) 
base 
a
, and attach it to the upper part of the 
front glass with the cable upwards (as 
illustrated).
Install a clip (not supplied) and adjust the length 
and position of the cord so that is does not 
obstruct your driving.
Removing the protection 
collar and the bracket  
Before installing the unit, remove the protection 
collar 
 and the bracket 
 from the unit.
Remove the pre-installed screws.
Remove the protection collar 
.
Pinch both edges of the protection collar 
 and 
push outwards, then pull out.
Remove the bracket 
.
  Insert both release keys 
 together between 
the unit and the bracket 
 until they click.
   Pull down the bracket 
, then pull up the unit 
to separate.
Mounting example  
Installation in the dashboard
Notes
Bend these claws outward for a tight fit, if necessary 
-2).
Make sure that the 2 catches on the protection collar 
 are properly 
engaged in the slots of the unit 
-3).
How to detach and attach the 
front panel  
Before installing the unit, detach the front panel.
-A  To detach
Before detaching the front panel, be sure to press 
Press 
, then slide the front panel to the right side, 
and pull out the left side.
-B  To attach
Engage part 
 of the front panel with part 
 of the unit, 
as illustrated, and push the left side into position until it 
clicks.
Warning if your car’s ignition 
has no ACC position
Unnecessary battery drainage will occur if the unit is 
wired directly to a car ignition system that does not have 
an ACC position. To avoid battery drainage, install a 
suitable switch on the ACC line.
Reset button
When the installation and connections are completed, be 
sure to press the reset button with a ballpoint pen, etc.
Foot brake type
Parking brake switch cord
Hand brake type
Parking brake switch cord
1
3
Dashboard
Fire wall
Claws
2
A
B
Red
Red
Yellow
Yellow
Red
Red
Yellow
Yellow
Power connection diagram
The auxiliary power connector may vary depending on 
your car. Check your car’s auxiliary power connector 
diagram to make sure the connections match correctly. 
There are two basic types (illustrated below). You may 
need to switch the positions of the red and yellow leads of 
the unit’s power supply connection cable 
.
After matching the connections and switched power 
supply leads correctly, connect the unit to the car’s power 
supply. If you have any questions and problems 
connecting your unit that are not covered in these 
instructions, please consult your car dealer.
Auxiliary power connector
4
Yellow
Continuous power supply
7
Red
Switched power supply
4
Yellow
Switched power supply
7
Red
Continuous power supply
Face the hook inwards.
1
2
2
3
1
a
b
Clips (not supplied)
a
b
Page of 10

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