MHC-V5 - Sony Audio Service Manual (repair manual)

2014H33-1

© 

2014.08

Model Name Using Similar Mechanism

NEW

CD Mechanism Type

CDM90-DVBU202 or CDM90-DVBU204

Optical Pick-up Block Name

CMS-S76RFS7G or CMS-S76RFS7G1 or 
CMS-S76RFS7GP

Note:
Be sure to keep your PC used for service and 
checking of this unit always updated with the 
latest version of your anti-virus software.
In case a virus affected unit was found during 
service, contact your Service Headquarters. 

POWER OUTPUT AND TOTAL 
HARMONIC DISTORTION:  (USA model 
only)

Left/Right Channel:
With 5 ohm loads, both channels 
driven, from 800  – 20,000  Hz;  
rated 150 watts per channel 
minimum RMS powe r, with no 
more than 0.7% total harmonic 
distortion from  250  milliwatts to 
rated output.

Power output (rated):

Left/Right Channel:  320 W + 
320 W  (at 5 ohms,  1 kHz, 1% THD)

Power output (reference):

Left/Right Channel:  480 W + 
480  W (per channel at 5 ohms,  
1 kHz)
Subwoof er: 480  W  (at 5 ohms,  
100 Hz)

Speak er system:  Tweeter + Mid range 

speak er + woofer

Tweeter L/R:  40  mm  (1 

in) cone  type

Mid L/R:  100 mm  (3 

in) cone  type

Woofer: 250 mm  (9 

in) cone  type

AUDIO IN/P ARTY  CHAIN IN L/R:

Voltage 2 V, impedanc e 
47 kilohms

 A (USB),   B (USB) port:

Type A, maximum  current: 
500  mA

AUDIO OUT/P ARTY  CHAIN OUT L/R:

Voltage 2 V, impedanc e 47 
kilohms

– iPhone 5s
– iPhone 5c
– iPhone 5
– iPhone 4s
– iPhone 4
– iPhone 3GS
–i Pod touch (5th generation)
–i Pod touch (4th generation)

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 

measur ement 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 88 dB

FM stereo, FM/AM  superheterodyne 
tuner
Antenna:

FM lead antenna
AM loop antenna

FM tuner section
Tuning range:

USA model:
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:

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

Communic ation system:

BLUETOOTH Standard version 3.0

Output:

BLUETOOTH Standard Power 
Class 2

Maximum communic ation range:

Line of sight approx. 10 m

1)

Frequency band:

2.4 GHz band (2.4000  GHz – 
2.4835 GHz)

Modulation method:

FHSS (Freq Hopping Spread 
Spectrum)

Compatible BLUETOOTH profiles

2)

:

A2DP (Advanced Audio 
Distribution Profile)
AVRCP 1.3 (Audio Video Remote  
Control Profile)
SPP (Serial Port Profile)

Supported codecs:

SBC (Sub Band Codec)
AAC (Advanced Audio Coding)

1)

The actual range will vary depending 
on factors such as obstacles  between 
devices, magnetic  fields  around a 
microwave oven, static electricity, 
reception sensitivity, antenna’ s 
performanc e, operating system,  
software application, etc.

2)

BLUETOOTH standard profiles 
indicate the purpose of BLUETOOTH 
communic ation between  devices.

Supported bit rate:

MPEG1 Layer-3:
32 kbps  – 320  kbps, VBR
WMA (USB devices only):
48 kbps – 192 kbps, VBR
AAC (USB devices  only):
48 kbps – 320 kbps, VBR

Sampling frequencies:

MPEG1 Layer-3:
32 kHz/ 44.1 kHz/ 48  kHz
WMA (USB devices only):
44.1 kHz
AAC (USB devices  only):
44.1 kHz

Power requirements:

USA model:
AC 120 V, 60 Hz

Other models:
AC 120 V – 240 V, 50/60 Hz

Power consumption:

240 W (0.5 W at the Power Saving 
mode)

Dimensions (w/h/d)  (Approx.):

339  mm  × 908  mm  × 325 mm 
(13 

in × 35 

in × 12 

in)

Mas s (Approx.):

18 kg  (39 lb  10 

oz)

Supplied accessories:

Remote control (1)
R6 (Size AA) batteries (2)
AC power cord (1)
FM lead/AM  loop antenna  (1)

Design and specifications are subject 
to change  without notice.

Mexican model: 

 

AC 120 V – 240 V, 60 Hz

Argentina and Australian models:
AC 220 V – 240 V, 50/60 Hz

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)

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 classified as a CLASS 1 
LASER product. This marking is located 
on the rear exterior.

0  OR  DOTTED  LINE  

0  ON  THE  SCHEMATIC  DIAGRAMS  AND  IN  

WALKMAN® and W ALKMAN® logo 
are registered trademarks of Sony 
Corporation.
MPEG Layer-3 audio coding 
technology and patents licensed 
from  Fraunhofer IIS and Thomson.
Windows Media is either a 
registered trademark or tr ademark 
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 fr om Microsoft or 
an authorized Microsoft subsidiar y.
The BLUETOOTH® wor d mark and 
logos are registered trademarks 
owned by Bluetooth SIG,  Inc. and 
any use of such marks by Sony 
Corporation is under license . Other 
trademarks and tr ade names ar e 
those of their respective owners.
The N Mark is a tr ademark or 
registered trademark of NFC F orum, 
Inc. in the United States and in other 
countries.
Android™ is a trademark of Google 
Inc.
Google Play™ is a trademark of 
Google Inc.
iPhone and iP od touch are
trademarks of Apple Inc.,  registered 
in the U.S. and other countries. App 
Store is a ser vice mark of Apple Inc.
“Made f or iPod” and “Made f or 
iPhone” mean that an electr onic 
accessory has been designed 
to connect specifically to iPod 
or iPhone, respectively, and has 
been  certified by the developer 
to meet Apple per formanc e 
standards. Apple is not responsible 
for the operation of this device 
or its compliance with saf ety and 
regulatory standar ds. Please note  
that the use of this a ccessory with 
iPod or iPhone may aff ect wireless 
performanc e.
All other trademarks and r egistered 
trademarks ar e of their respective 
holders. In this manual,  ™ and ® 
marks ar e not specified.

 .............................................  

4

2-1. Disassembly 

Flow 

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

2-2.  Side L, R Panel Block .....................................................   8
2-3.  Top Panel Block ..............................................................   9
2-4.  Loading Panel Block .......................................................   10
2-5. CDM 

Block-1 

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

2-6. CDM 

Block-2 

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

2-7. Duct 

.................................................................................  13

2-8.  Back Panel Block ............................................................   14
2-9. ARAGON 

Board-1 

.........................................................  15

2-10. ARAGON Board-2 .........................................................   16
2-11. ARAGON Board-3 .........................................................   16
2-12. D-AMP Board-1 ..............................................................   17
2-13. D-AMP Board-2 ..............................................................   18
2-14. Sub Chassis .....................................................................   19
2-15. Front Panel-1 ...................................................................   19
2-16. Front Panel-2 ...................................................................   20
2-17.  Switching Regulator (SWR1) .........................................   21
2-18.  Front Panel (SP) Block ...................................................   22
2-19.  SPEAKER LED Board, Front Panel (SP) Assy ..............   23
2-20.  Loudspeaker (25 cm) (Woofer) (SP5) .............................   24
2-21.  Loudspeaker (10 cm) (Mid: L-ch) (SP1) ........................   25
2-22.  Loudspeaker (10 cm) (Mid: R-ch) (SP3) ........................   26
2-23.  FL Board Block ...............................................................   27
2-24.  Bluetooth Module (BT1) ................................................   28
2-25.  USB Board Block ...........................................................   29
2-26.  NFC Module (NFC1) ......................................................   30
2-27. FFC Holder .....................................................................   31
2-28.  Optical Pick-up (CMS-S76RFS7G) (OP1) .....................   32
2-29.  Volume Knob Block ........................................................   33

 ............................................................   34

 ......................................   37

5-1.  Block Diagram - CD/USB Section - ...............................   38
5-2.  Block Diagram - MAIN Section - ...................................   39
5-3.  Block Diagram - AMP Section - .....................................   40
5-4. Block 

Diagram 

- PANEL/POWER SUPPLY Section - ............................   41

5-5.  Schematic Diagram - MAIN Section (1/9) - ...................   43

5-6.  Schematic Diagram - MAIN Section (2/9) - ...................   44
5-7.  Schematic Diagram - MAIN Section (3/9) - ...................   45
5-8.  Schematic Diagram - MAIN Section (4/9) - ...................   46
5-9.  Schematic Diagram - MAIN Section (5/9) - ...................   47
5-10.  Schematic Diagram - MAIN Section (6/9) - ...................   48
5-11.  Schematic Diagram - MAIN Section (7/9) - ...................   49
5-12.  Schematic Diagram - MAIN Section (8/9) - ...................   50
5-13.  Schematic Diagram - MAIN Section (9/9) - ...................   51
5-14.  Printed Wiring Boards - MAIN Section (1/2) - ..............   52
5-15.  Printed Wiring Boards - MAIN Section (2/2) - ..............   53
5-16. Printed Wiring Board 

- D-AMP Board (Component Side) - ..............................   54

5-17. Printed Wiring Board 

- D-AMP Board (Conductor Side) - ................................   55

5-18.  Schematic Diagram - D-AMP Board (1/2) - ...................   56
5-19.  Schematic Diagram - D-AMP Board (2/2) - ...................   57
5-20.  Printed Wiring Board - USB Board (Former type) - ......   58
5-21.  Schematic Diagram - USB Board (Former type) - .........   58
5-22.  Printed Wiring Board - USB Board (New type) - ...........   59
5-23.  Schematic Diagram - USB Board (New type) - .............   59
5-24.  Printed Wiring Boards - PANEL Section - .....................   60
5-25.  Schematic Diagram - PANEL Section - ..........................   61
5-26.  Printed Wiring Boards - KEY Section - ..........................   62
5-27.  Schematic Diagram - KEY Section - ..............................   63

6-1.  Side Panel Section ..........................................................   75
6-2.  Loading Panel Section ....................................................   76
6-3.  Back Panel Section .........................................................   77
6-4.  D-AMP Board, ARAGON Board Section ......................   78
6-5.  Switching Regulator Section ..........................................   79
6-6.  Speaker Cabinet Section .................................................   80
6-7.  Top Panel Section ...........................................................   81
6-8.  Front Panel Section .........................................................   82
6-9.  CDM Block Section ........................................................   83
6-10.  CD Mechanism Deck Section 

(CDM90-DVBU202 or CDM90-DVBU204) .................   84

 ..............................   85

Accessories are given in the last of the electrical parts list.

Note 1: Refer to the “NEW/FORMER DISCRIMINATION OF USB 

BOARD” on page 4 for how to distinguish New type and For-
mer type of USB board. (Except Australian model)

Note 2: Refer to the service manual supplement-2 for information of 

FL, TOP KEY A, TOP KEY B and USB boards of Australian 
model.

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.

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.

NOTE  OF  REPLACING  THE  MS-476  BOARD
When the MS-476 board is defective, replace the CDM90 ASSY 
(Ref. No. CDM1).

NOTE  OF  REPLACING  THE  IC001,  IC002,  IC105,  IC106,  
IC302  AND  IC306  ON  THE  ARAGON  BOARD
IC001, IC002, IC105, IC106, IC302 and IC306 on the ARAGON 
board cannot replace with single. When these parts are damaged, 
replace the complete mounted board.

NOTE  OF  PERFORMING  THE  OPERATION  CHECK  IN  
THE  STATE  THAT  HEAT  SINK  WAS  REMOVED
When performing the operation check in the state that this unit was 
disassembled, it is possible to perform the operation check in the 
state that heat sink was removed. But don’t perform the operation 
check in the long time, and perform the operation check in the 
volume state as low as possible.

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

J-2501-307-A DISC 

(HLX-A1), 

TEST

RELEASING  THE  DISC  TRAY  LOCK
The disc tray lock function for the antitheft of sample disc in the 
shop is equipped.
Disc tray lock function can be released by the following procedure.

Releasing Procedure:
1.  Press the [

?/1

] button to turn the power on.

2.  Press the [FUNCTION] button to turn the CD function.
3.  Press two buttons of the [x] and [ENTER] simultaneously for 

fi ve seconds.

4.  The message “UNLOCKED” is displayed on the fl uorescent 

indicator tube and the disc tray is unlocked.

Note: When “LOCKED” is displayed, the disc tray lock is not released by 

turning power on/off with the [?/1] button.

MODEL  IDENTIFICATION
Distinguish by Part No. and Destination code on the rear side of 
a main unit.

4-484-682-0[]

E2

120V AC Area in E

4-484-682-1[]

AU1

Australian

4-484-682-2[]

U2

US

4-484-682-4[]

E51

Chilean and Peruvian

4-484-682-5[]

MX4

Mexican

4-484-682-7[]

AR2

Argentina

NEW/FORMER  DISCRIMINATION  OF  USB  BOARD
(120V AC area in E, Chilean, Peruvian, Mexican and Argentina 
models only)
As for this unit, circuit on the USB board has been changed in the 
midway of production.
Distinguish of New/Former type of USB board, please refer to the 
following fi gure.

2200

D2208

D2210

JW2700

JW2702

A

K

K

A

A/K

K/A