CMT-V50IP - Sony Audio Service Manual (repair manual)

cmt-v50ip service manual
Model
CMT-V50IP
Pages
89
Size
7.84 MB
Type
PDF
Document
Service Manual
Brand
Device
Audio
File
cmt-v50ip.pdf
Date

Read Sony CMT-V50IP Service Manual online

SERVICE MANUAL
Sony Corporation
Published by Sony Techno Create Corporation
CMT-V50iP
SPECIFICATIONS
MICRO HI-FI COMPONENT SYSTEM
9-893-465-04
2013E33-1
© 
2013.05
US Model
Canadian Model
AEP Model
E Model
Australian Model
Ver. 1.3  2013.05
Model Name Using Similar Mechanism
NEW
CD Mechanism Type
BSXD1-DVBU201
Optical Pick-up Block Name
CMS-S76RFS3G
Input
AUDIO IN (stereo mini jack): Sensitivity 700 mV, impedance 47 kilohms
Outputs
PHONES (stereo mini jack): Accepts headphones of 8 ohms or more
CD player section
System: Compact disc and digital audio system
Laser Diode Properties
Emission Duration: Continuous
Laser Output*: Less than 44.6 μW
* This output is the value measurement at a distance of 200 mm from the 
objective lens surface on the Optical Pick-up Block with 7 mm aperture.
Frequency response: 20 Hz   20 kHz
Signal-to-noise ratio: More than 90 dB
Dynamic range: More than 90 dB
Tuner section
FM stereo, FM/AM superheterodyne tuner
Antenna: FM lead antenna
AM loop antenna
FM tuner section
Tuning range:
North American and Brazilian models:
87.5 MHz   108.0 MHz (100 kHz step)
Other models:
87.5 MHz   108.0 MHz (50 kHz step)
AM tuner section
Tuning range:
European models:
531 kHz   1602 kHz (9 kHz step)
Latin American models:
531 kHz   1710 kHz (9 kHz step)
530 kHz   1710 kHz (10 kHz step)
Other models:
531 kHz   1602 kHz (9 kHz step)
530 kHz   1610 kHz (10 kHz step)
iPod/iPhone/iPad section
Compatible iPod/iPhone/iPad models:
 iPod touch 4th generation
 iPod touch 3rd generation
 iPod touch 2nd generation
 iPod nano 6th generation
 iPod nano 5th generation (video camera)
 iPod nano 4th generation (video)
 iPod nano 3rd generation (video)
 iPod classic 160 GB (2009)
iPhone 4S
iPhone 4
iPhone 3GS
iPhone 3G
iPad2
iPad
“Made for iPod,” “Made for iPhone,” and “Made for iPad” mean that an 
electronic accessory has been designed to connect specifically to iPod, iPhone, 
or iPad, respectively, and has been certified by the developer to meet Apple 
performance standards. Apple is not responsible for the operation of this 
device or its compliance with safety and regulatory standards. Please note 
that the use of this accessory with iPod, iPhone, or iPad may affect wireless 
performance.
USB section (Except US, Canadian and Australian models)
Supported bit rate:
MP3 (MPEG 1 Audio Layer-3): 32 kbps   320 kbps, VBR
WMA: 48 kbps   192 kbps, VBR
AAC: 48 kbps   320 kbps
Sampling frequencies:
MP3 (MPEG 1 Audio Layer-3): 32/44.1/48 kHz
WMA: 44.1 kHz 
AAC: 44.1 kHz
 (USB) port: Type A, maximum current 500 mA
Speaker section
Full-range speaker: 65 mm, cone type
Passive radiator: 67 mm × 108 mm
Rated impedance: 8 ohms
General
Power requirements:
AC adapter
Input: 100 V   240 V AC, 50/60 Hz
Output: DC 19.5 V 3.9A
Power consumption: 32 watts
Dimensions (W/H/D): 
Approx. 449 mm × 212 mm × 137 (95) mm (incl. protruding parts)
Mass: Approx. 2.8 kg
Quantity of the main unit: 1 piece
Supplied accessories: Remote Commander (1), AC adapter (1), Power cord (1),  
FM lead/AM loop antenna (1), Protective cushion (2), 
R6 (Size AA) batteries (2)
Design and specifications are subject to change without notice.
Standby power consumption: 0.5 W
Amplifier section
AUDIO POWER SPECIFICATIONS
POWER OUTPUT AND TOTAL HARMONIC DISTORTION:
(The United States model only)
With 8 ohm loads, both channels driven, from 120 - 15,000 Hz; rated 20 watts 
per channel minimum RMS power, with no more than 10% total harmonic 
distortion from 250 milliwatts to rated output.
Power output (rated): 16 watts + 16 watts (8 ohms at 1 kHz, 1% THD)
Continuous RMS power output (reference): 20 watts + 20 watts (8 ohms at 
1 kHz, 10% THD)
CMT-V50iP
2
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.
SAFETY  CHECK-OUT
After correcting the original service problem, perform the follow-
ing safety check before releasing the set to the customer:
Check the antenna terminals, metal trim, “metallized” knobs, 
screws, and all other exposed metal parts for AC leakage.
Check leakage as described below.
LEAKAGE  TEST
The AC leakage from any exposed metal part to earth ground and 
from all exposed metal parts to any exposed metal part having a 
return to chassis, must not exceed 0.5 mA (500 microamperes.). 
Leakage current can be measured by any one of three methods.
1.  A commercial leakage tester, such as the Simpson 229 or RCA 
WT-540A. Follow the manufacturers’ instructions to use these 
instruments.
2.  A battery-operated AC milliammeter. The Data Precision 245 
digital multimeter is suitable for this job.
3.  Measuring the voltage drop across a resistor by means of a 
VOM or battery-operated AC voltmeter. The “limit” indication 
is 0.75 V, so analog meters must have an accurate low-voltage 
scale. The Simpson 250 and Sanwa SH-63Trd are examples 
of a passive VOM that is suitable. Nearly all battery operated 
digital multimeters that have a 2 V AC range are suitable. (See 
Fig. A)
1.5 k
Ω
0.15 
μF
AC
voltmeter
(0.75 V)
To Exposed Metal
Parts on Set
Earth Ground
Fig. A.  Using an AC voltmeter to check AC leakage.
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.
ATTENTION  AU  COMPOSANT  AYANT  RAPPORT  
À  LA  SÉCURITÉ!
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  COMPOSANTS  QUE  
PAR  DES  PIÈCES  SONY  DONT  LES  NUMÉROS  SONT  DON-
NÉS  DANS  CE  MANUEL  OU  DANS  LES  SUPPLÉMENTS  
PUBLIÉS  PAR  SONY.
License and Trademark Notice
iPhone®, iPod®, iPod classic®, iPod nano®, and iPod 
touch® are trademarks of Apple Inc., registered in the 
U.S. and other countries. iPad® is a trademark of Apple 
Inc.
MPEG Layer-3 audio coding technology and patents 
licensed from Fraunhofer IIS and Thomson.
Windows Media is either a registered trademark or 
trademark of Microsoft Corporation in the United 
States and/or other countries.
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.
All other trademarks and registered trademarks are of 
their respective holders. In this manual, 
 and 
®
 marks 
are not specified.
This appliance is classified 
as a CLASS 1 LASER 
product. This marking 
is located on the bottom 
exterior of the unit.
CAUTION
Use of controls or adjustments or performance of procedures 
other than those specifi ed herein may result in hazardous radia-
tion exposure.
CMT-V50iP
3
1. 
SERVICING  NOTES 
 .............................................  
4
2. DISASSEMBLY
2-1. Disassembly 
Flow 
...........................................................   7
2-2.  Panel (Bottom) Block .....................................................   8
2-3. Dock 
Block 
.....................................................................   9
2-4. Case 
(Dock 
Top) 
.............................................................   9
2-5.  Case (Dock Bottom) .......................................................   10
2-6.  Panel (Dock Top IP) Block .............................................   10
2-7. Spring 
(Loading) 
.............................................................  11
2-8. Lever 
(Cam) 
....................................................................  11
2-9. Spring 
(Lid) 
.....................................................................  12
2-10. Spring (Foot) ...................................................................   12
2-11.  D LED R Board, D LED L Board, IP JUNC Board .......   13
2-12. Spring (Lock) ..................................................................   14
2-13.  IP DOCK Board ..............................................................   14
2-14. Front Block .....................................................................   15
2-15.  Chassis (Main) Block ......................................................   16
2-16. RMC Board .....................................................................   17
2-17.  Loudspeaker (67 × 108 mm) (L/R-CH) (SP3, SP4) .......   17
2-18.  Loudspeaker (6.5 cm) (L/R-CH) (SP1, SP2) ..................   18
2-19. Top Block ........................................................................   19
2-20.  Soldering of Short-land ...................................................   19
2-21.  USB Board (Except US, Canadian, Australian) .............   20
2-22. LCD Board ......................................................................   20
2-23.  JACK Board Block .........................................................   21
2-24. JACK Board ....................................................................   21
2-25. MAIN Board ...................................................................   22
2-26.  CD Mechanism Deck Block ...........................................   23
2-27.  Tuner 1AM3RZ Assy (TU1), Plate (Balance) ................   24
2-28. FFC Guide .......................................................................   24
2-29. Bottom Cover ..................................................................   25
2-30. Loading Assy ..................................................................   26
2-31.  Optical Pick-up Block (CMS-S76RFS3G) (OP1) ..........   26
2-32.  How to Bend Wire (Flat Type) ........................................   27
3. 
TEST  MODE 
 ............................................................   29
4. 
ELECTRICAL  CHECKS 
 ......................................   31
5. DIAGRAMS
5-1.  Block Diagram - CD/USB Section - ...............................   32
5-2.  Block Diagram - AUDIO Section - .................................   33
TABLE  OF  CONTENTS
5-3. Block 
Diagram 
- PANEL/POWER SUPPLY Section - ............................   34
5-4.  Printed Wiring Boards - MAIN Section (1/2) - ..............   36
5-5.  Printed Wiring Board - MAIN Section (2/2) - ................   37
5-6.  Schematic Diagram - MAIN Section (1/7) - ...................   38
5-7.  Schematic Diagram - MAIN Section (2/7) - ...................   39
5-8.  Schematic Diagram - MAIN Section (3/7) - ...................   40
5-9.  Schematic Diagram - MAIN Section (4/7) - ...................   41
5-10.  Schematic Diagram - MAIN Section (5/7) - ...................   42
5-11.  Schematic Diagram - MAIN Section (6/7) - ...................   43
5-12.  Schematic Diagram - MAIN Section (7/7) - ...................   44
5-13. Printed Wiring Boards 
- SHORTLAND/USB Boards - .......................................   45
5-14.  Schematic Diagram - SHORTLAND/USB Boards - ......   45
5-15.  Printed Wiring Boards - DOCK Section - ......................   46
5-16.  Schematic Diagram - DOCK Section - ...........................   47
5-17.  Printed Wiring Board - JACK Board - ............................   48
5-18.  Schematic Diagram - JACK Board - ..............................   49
5-19.  Printed Wiring Boards - PANEL Section - .....................   50
5-20.  Schematic Diagram - PANEL Section - ..........................   51
6. 
EXPLODED  VIEWS
6-1.  Panel (Bottom) Section ...................................................   63
6-2. Dock 
Section 
...................................................................  64
6-3.  IP DOCK Board Section .................................................   65
6-4.  Front Panel Section .........................................................   66
6-5.  FUNC LED, RMC Board Section ..................................   67
6-6.  Panel (Top) Section .........................................................   68
6-7.  LCD Board Section .........................................................   69
6-8.  JACK Board Section .......................................................   70
6-9.  MAIN Board Section ......................................................   71
6-10.  CD Mechanism Deck Section .........................................   72
6-11. Loudspeaker Section .......................................................   73
6-12.  Panel (Back) Section .......................................................   74
7. 
ELECTRICAL  PARTS  LIST 
 ..............................   75
Accessories are given in the last of the electrical parts list.
CMT-V50iP
4
SECTION  1
SERVICING  NOTES
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)
 : LEAD  FREE  MARK
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.
NOTES  ON  HANDLING  THE OPTICAL  PICK-UP  
BLOCK  OR  BASE  UNIT
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.
NOTES  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 the optical 
pickup block. Therefore, when checking the laser diode emission, 
observe from more than 30 cm away from the objective lens.
RELEASING  THE  DISC  SLOT  LOCK
The disc slot lock function for the antitheft of an demonstration 
disc in the store is equipped.
Releasing Procedure:
1.  Press the [
?/1
] button to turn the power on.
2.  Touch the [FUNCTION] sensor to turn the CD function.
3.  Touch the [x] sensor and press the [Z] button simultaneously 
for fi ve seconds.
4.  The message “UNLOCKED” is displayed on the liquid crystal 
display and the disc slot is unlocked.
Note: When “LOCKED” is displayed, the disc slot lock is not released by 
turning power on/off with the [?/1] button.
NOTE  OF  REPLACING  THE  MS-486  BOARD
When the MS-486 board is defective, exchange the LOADING 
ASSY (IM) (LOM1).
NOTE  OF  REPLACING  THE  TOUCH  KEY  BOARD
When the TOUCH KEY board is defective, exchange the TOP 
ASSY (TOP1).
NOTE  OF  REPLACING  THE  IC401,  IC502,  IC504, 
 
IC801,  IC901,  IC902  AND  IC903  ON  THE  MAIN  BOARD
IC401, IC502, IC504, IC801, IC901, IC902 and IC903 on the 
MAIN board cannot exchange with single. When these parts are 
damaged, exchange the complete mounted board.
CHECKING  THE  OPERATION  AFTER  REPAIR
After repair completion, connect the “iPod” etc. corresponding to 
this unit, and check the operation of playback, recording, charge, 
etc.
TEST  DISCS
Use following TEST DISC (for CD) when this unit confi rms the 
operation and checks it.
Part No.
   
Description
3-702-101-01 DISC 
(YEDS-18), 
TEST
4-225-203-01 DISC 
(PATD-012), 
TEST
COLOR  VARIATION
Destination
Color
(B)
Black
(SI) 
Light 
Silver
(S)
Dark 
Silver
(P)
Pink
(R)
Red
US
z
Canadian
z
AEP
z
z
z
Russian
z
Australian
z
z
Latin American
z
Brazilian
z
Singapore
z
Taiwan
z
Korean
z
Thai
z
z
HOW  TO  EJECT  THE  DISC  WHEN  POWER  SWITCH  
TURN  OFF
•  Refer to “SECTION 2. DISASSEMBLY”, remove the CD 
mechanism deck from the unit.
The CD mechanism deck is taken out, and please rotate the pulley 
in the direction of the arrow by screwdriver etc. after detaching and 
take out the disc.
disc
– CD mechanism deck bottom side view –
Ver. 1.2
Page of 89
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