Sony MHC-V77DW User manual

SERVICE MANUAL
Sony Corporation
Published by Sony EMCS (Malaysia) PG Tec
HOME AUDIO SYSTEM
9-890-683-01
2016H80-1
© 2016.08
AEP Model
UK Model
E Model
Australian Model
Ver. 1.0 2016.08
SPECIFICATIONS
DVD
Section
Model Name Using Similar Mechanism SA-WGT4D
DVD Mechanism Type CDM90-DVBU204//M
Optical Pick-up Name CMS-S76RFS7G1 OR CMS-S76RFS7GP
– Continued on next page –
MHC-V77DW
Speaker section
Speaker system:
Tweeter + Midrange speaker + Woofer
Speaker unit:
Tweeter L/R: 40 mm, cone type
Midrange L/R: 120 mm, cone type
Woofer: 250 mm, cone type
Rated impedance:
Tweeter L/R: 4 ohms
Midrange L/R: 4 ohms
Woofer: 8 ohms
Inputs
AUDIO/PARTY CHAIN IN (TV) L/R:
Voltage 2 V, impedance
47 kilohms
TV (ARC):
Supported audio signal:
2-channel Linear PCM
MIC1, MIC2:
Sensitivity 1 mV, impedance
10 kilohms
Outputs
AUDIO/PARTY CHAIN OUT L/R:
Voltage 2 V, impedance 1 kilohm
VIDEO OUT:
Max. output level 1 Vp-p,
unbalanced, Sync. negative load
impedance 75 ohms
HDMI OUT (TV):
Supported audio signal:
2-channel Linear PCM (up to
48 kHz), Dolby Digital
HDMI section
Connector:
Type A (19 pin)
Disc player section
System:
Compact disc and digital audio and
video 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
Video color system format:
Latin American model:
NTSC
Other models:
NTSC and PAL
USB section
Supported USB device:
Mass Storage Class
Maximum current:
1 A
(USB) port:
Type A
FM tuner section
FM stereo, FM superheterodyne tuner
Antenna:
FM lead antenna
Tuning range:
87.5 MHz – 108.0 MHz (50 kHz step)
BLUETOOTH section
Communication system:
BLUETOOTH Standard version 4.2
Output:
BLUETOOTH Standard Power Class 1
Maximum communication range:
Line of sight approx. 30 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 (Audio Video Remote
Control Profile)
SPP (Serial Port Profile)
Supported codecs:
SBC (Subband Codec)
AAC (Advanced Audio Coding)
LDAC
*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 performance, operating system,
software application, etc.
*2 BLUETOOTH standard profiles
indicate the purpose of BLUETOOTH
communication between devices.
Network section
Ethernet LAN
100BASE-TX
Wireless LAN
Compatible standards:
IEEE 802.11 a/b/g/n
Security:
WPA/WPA2-PSK, WEP
Radio frequency:
2.4 GHz, 5 GHz
Supported audio formats
Supported bit rate and sampling frequencies:
MP3:
16/22.05/24/32/44.1/48 kHz,
16 kbps – 320 kbps (CBR/VBR)
AAC:
16/22.05/24/32/44.1/48/88.2/96 kHz,
16 kbps – 320 kbps (CBR/VBR)
WMA:
32/44.1/48 kHz, 16 kbps – 320 kbps
(CBR/VBR)
WAV:
16/22.05/24/32/44.1/48/88.2/96/
176.4/192 kHz (16/24 bit)
AIFF:
32/44.1/48/88.2/96/176.4/192 kHz
(16/24 bit)
FLAC:
16/22.05/24/32/44.1/48/88.2/96/
176.4/192 kHz (16/24 bit)
ALAC:
16/22.05/24/32/44.1/48/88.2/96/
176.4/192 kHz (16/24 bit)
DSD (DSF/DSDIFF):
2.8 MHz (1 bit)
Supported video formats
Xvid:
Video codec: Xvid video
Bit rate: 4.854 Mbps (MAX)
Resolution/Frame rate:
720 × 480, 30 fps
720 × 576, 25 fps (except for Latin
American model)
Audio codec: MP3
MPEG4:
File format: MP4 File Format
Video codec: MPEG4 Simple
Profile (AVC is not compatible.)
Bit rate: 4 Mbps
Resolution/Frame rate:
720 × 480, 30 fps
720 × 576, 25 fps (except for Latin
American model)
Audio codec: AAC-LC (HE-AAC is
not compatible.)
DRM: Not compatible
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.

MHC-V77DW
2
SAFETY-RELATED COMPONENT WARNING!
COMPONENTS IDENTIFIED BY MARK 0OR DOTTED LINE
WITH MARK 0ON 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.
SAFETY CHECK-OUT
After correcting the original service problem, perform the following
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 2V AC range are suitable. (See
Fig. A)
1.5 kΩ0.15 μF
AC
voltmeter
(0.75 V)
To Exposed Metal
Parts on Set
Earth Ground
Fig. A. Using an AC voltmeter to check AC leakage.
General
Power requirements:
AC 120 V – 240 V, 50/60 Hz
Power consumption:
220 W
Power consumption (at the Power Saving mode):
0.5 W (When “NW STBY” is set to “OFF” and
[CONTROL FOR HDMI] is set to [OFF].)
3 W* (When “NW STBY” is set to “ON” and
[CONTROL FOR HDMI] is set to [ON].)
Dimensions (W/H/D) (Approx.):
340 mm × 924 mm × 378 mm
Mass (Approx.):
22 kg
* The power consumption of the system will be less than 0.5 W
when there is no HDMI connection and “NW STBY” is set to
“OFF”.
Design and specifications are subject to change without notice.
License and Trademark Notice
•
is a trademark of DVD Format/Logo Licensing Corporation.
• “DVD+RW”, “DVD-RW”, “DVD+R”, “DVD-R”, “DVD VIDEO”, and
the “CD” logos are trademarks.
• WALKMAN®and WALKMAN®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 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.
• This system incorporates Dolby* Digital.
* Manufactured under license from Dolby Laboratories. Dolby,
Dolby Audio, and the double-D symbol are trademarks of Dolby
Laboratories.
• This system incorporates High-Definition Multimedia Interface
(HDMI™) technology. The terms HDMI and HDMI High-
Definition Multimedia Interface, and the HDMI Logo are
trademarks or registered trademarks of HDMI Licensing LLC in
the United States and other countries.
• “BRAVIA” is a trademark of Sony Corporation.
• LDAC™ and LDAC logo are trademarks of Sony Corporation.
• The BLUETOOTH®word 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 trade names are those of their respective owners.
• The N-Mark is a trademark or registered trademark of NFC Forum,
Inc. in the United States and in other countries.
• Android™ is a trademark of Google Inc.
• Google Play™ is a trademark of Google Inc.
• Google Cast™ is a trademark of Google Inc.
• Apple, the Apple logo, iPhone, and iPod touch are trademarks of
Apple Inc., registered in the U.S. and other countries. App Store
is a service mark of Apple Inc.
• “Made for iPod,” and “Made for iPhone” mean that an electronic
accessory has been designed to connect specifically to iPod or
iPhone, 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 or iPhone may affect wireless performance.
• Wi-Fi®, Wi-Fi Protected Access® and Wi-Fi Alliance®are
registered trademarks of Wi-Fi Alliance®.
• Wi-Fi CERTIFIED™, WPA™, WPA2™ and Wi-Fi Protected
Setup™ are trademarks of Wi-Fi Alliance®.
• DLNA™, the DLNA Logo and DLNA CERTIFIED™ are
trademarks, service marks, or certification marks of the Digital
Living Network Alliance.
• AOSS is a trademark of BUFFALO INC.
• This product incorporates Spotify software which is subject to
3rd party licenses found here:
https://developer.spotify.com/
esdk-third-party-licenses/
• Spotify and Spotify logos are trademarks of the Spotify Group.
• ClearAudio+ and are trademarks of Sony
Corporation.
• “Xperia” and “Xperia Tablet” are trademarks of Sony Mobile
Communications AB.
• THIS PRODUCT IS LICENSED UNDER THE MPEG-4 VISUAL
PATENT PORTFOLIO LICENSE FOR THE PERSONAL AND
NON-COMMERCIAL USE OF A CONSUMER FOR
(i) ENCODING VIDEO IN COMPLIANCE WITH THE MPEG-4
VISUAL STANDARD (“MPEG-4 VIDEO”)
AND/OR
(ii)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 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 COMMER-
CIAL USES AND LICENSING MAY BE OBTAINED FROM MPEG
LA, L.L.C.
HTTP://WWW.MPEGLA.COM
• All other trademarks are trademarks of their respective owners.
• In this manual, ™ and ®marks are not specified.
•Abbreviation
AUS : Australian model
E4 : African model
EA : Saudi Arabia model
LA9 : Latin-American model
MY : Malaysia model
RU : Russian model
TH : Thai model

MHC-V77DW
3
1. SERVICING NOTES ............................................. 4
2. DISASSEMBLY
2-1. Disassembly Flow........................................................... 10
2-2. Rear Cover Assy ............................................................. 11
2-3. Side-L Panel.................................................................... 11
2-4. Panel Loading Section .................................................... 12
2-5. Top Panel Section ........................................................... 13
2-6. Side-R Panel ................................................................... 14
2-7. CDM Section .................................................................. 15
2-8. CDM90-DVBU204//M................................................... 15
2-9. Service, Optical Device (7G), Flexible Flat Cable ......... 16
2-10. Back Panel Section ......................................................... 17
2-11. 2CH DAMP Board.......................................................... 18
2-12. BENTEN-MOTHERBOARD Board, 89G Board .......... 19
2-13. REGULATOR, SWITCHING (SSN-161AD) ................ 20
2-14. Front Panel Section......................................................... 21
2-15. Loudspeaker (260mm)-180-11 (Woofer) (SP5).............. 22
2-16. Loudspeaker (120mm)-181-11 (Mid: L-CH) (SP1),
Loudspeaker (120mm)-181-11 (Mid: R-CH) (SP3) ....... 22
3. TEST MODE ............................................................ 23
4. ELECTRICAL CHECK ......................................... 25
5. TROUBLESHOOTING .......................................... 27
6. DIAGRAMS
6-1. Block Diagram - RS SERVO, USB Section -................. 31
6-2. Block Diagram - MEMORY Section -............................ 32
6-3. Block Diagram - MAIN Section -................................... 33
6-4. Block Diagram - AMP Section -..................................... 34
6-5. Block Diagram
- PANEL, POWER SUPPLY Section -........................... 35
6-6. Printed Wiring Board - BENTEN-MOTHERBOARD
Board (Component Side) -.............................................. 37
6-7. Printed Wiring Board - BENTEN-MOTHERBOARD
Board (Conductor Side) -................................................ 38
6-8. Schematic Diagram
- BENTEN-MOTHERBOARD Board (1/11) - .............. 39
6-9. Schematic Diagram
- BENTEN-MOTHERBOARD Board (2/11) - .............. 40
6-10. Schematic Diagram
- BENTEN-MOTHERBOARD Board (3/11) - .............. 41
6-11. Schematic Diagram
- BENTEN-MOTHERBOARD Board (4/11) - .............. 42
6-12. Schematic Diagram
- BENTEN-MOTHERBOARD Board (5/11) - .............. 43
6-13. Schematic Diagram
- BENTEN-MOTHERBOARD Board (6/11) - .............. 44
6-14. Schematic Diagram
- BENTEN-MOTHERBOARD Board (7/11) - .............. 45
6-15. Schematic Diagram
- BENTEN-MOTHERBOARD Board (8/11) - .............. 46
6-16. Schematic Diagram
- BENTEN-MOTHERBOARD Board (9/11) - .............. 47
6-17. Schematic Diagram
- BENTEN-MOTHERBOARD Board (10/11) - ............ 48
6-18. Schematic Diagram
- BENTEN-MOTHERBOARD Board (11/11) -............. 49
6-19. Printed Wiring Board
- SENSOR Board (Component Side) - ........................... 50
6-20. Printed Wiring Board
- SENSOR Board (Conductor Side) - ............................. 51
TABLE OF CONTENTS
6-21. Schematic Diagram - SENSOR Board (1/3) - ................ 52
6-22. Schematic Diagram - SENSOR Board (2/3) - ................ 53
6-23. Schematic Diagram - SENSOR Board (3/3) - ................ 54
6-24. Printed Wiring Board - 2CH DAMP Board -.................. 55
6-25. Printed Wiring Board - 89G Board -............................... 56
6-26. Schematic Diagram - 89G Board (1/3) -......................... 57
6-27. Schematic Diagram - 89G Board (2/3) -......................... 58
6-28. Schematic Diagram - 89G Board (3/3) -......................... 59
6-29. Printed Wiring Board - LCD Board -.............................. 60
6-30. Schematic Diagram - LCD Board - ................................ 61
6-31. Printed Wiring Board - MIC Board - .............................. 62
6-32. Schematic Diagram - MIC Board -................................. 63
6-33. Printed Wiring Board - DUMMY Board -...................... 64
6-34. Schematic Diagram - DUMMY Board -......................... 64
6-35. Printed Wiring Board - FM-TUNER Board - ................. 65
6-36. Schematic Diagram - FM-TUNER Board -.................... 66
6-37. Printed Wiring Board - POWER BUTTON Board - ...... 66
6-38. Schematic Diagram - POWER BUTTON Board - ......... 66
6-39. Printed Wiring Board - USB Board -.............................. 67
6-40. Schematic Diagram - USB Board -................................. 67
6-41. Printed Wiring Board - IR Board -.................................. 67
6-42. Schematic Diagram - IR Board - .................................... 67
6-43. Printed Wiring Board - SPK PARTY LED Board - ........ 68
6-44. Schematic Diagram - SPK PARTY LED Board -........... 68
6-45. Printed Wiring Board - PARTY LED Board - ................ 68
6-46. Schematic Diagram - PARTY LED Board - ................... 68
6-47. Printed Wiring Board - SPK LED Board - ..................... 69
6-48. Schematic Diagram - SPK LED Board - ........................ 69
7. EXPLODED VIEWS
7-1. Cover, Rear, Panel Side, L.............................................. 102
7-2. Panel Loading Section .................................................... 103
7-3. Back Panel Section ......................................................... 104
7-4. 2CH DAMP Board Section............................................. 105
7-5. BENTEN-MOTHERBOARD Board,
89G Board Section.......................................................... 106
7-6. Chassis Section ............................................................... 107
7-7. Front Panel Section......................................................... 108
7-8. Speaker Cabinet Section ................................................. 109
7-9. Top Panel Section ........................................................... 110
7-10. Side-R Panel Section ...................................................... 111
7-11. CDM BLOCK Section.................................................... 112
7-12. DVD Mechanism Section
(CDM90-DVBU204//M) ................................................ 113
8. ELECTRICAL PARTS LIST .............................. 114
Accessories are listed in the last part of the electrical parts list.

MHC-V77DW
4
SECTION 1
SERVICING NOTES
Notes on chip component replacement
• Never reuse a disconnected chip component.
• Notice that the minus side of a tantalum capacitor may be
damaged by heat.
Flexible Circuit Board Repairing
• Keep the temperature of the 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.
UNLEADED SOLDER
Boards requiring use of unleaded solder are printed with the
leadfree 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 flow)
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.
CAUTION
Use of controls or adjustments or performance of procedures
other than those specified herein may result in hazardous radiation
exposure.
NOTES ON HANDLING THE OPTICAL PICK-UP BLOCK
OR BASE UNIT
The laser diode in the optical pick-up block may suffer electrostatic
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 flexible 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 reflective 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.
MODEL IDENTIFICATION
This appliance is classified as a
CLASS 1 LASER product under
IEC 60825-1:2007. This marking
is located on the rear exterior.
Model Part No.
LA9 4-595-019-0[]
AUS 4-595-019-2[]
AEP, UK 4-595-019-3[]
E4 4-595-019-4[]
EA 4-595-019-6[]
RU 4-595-019-7[]
MY 4-595-019-8[]
TH 4-596-414-0[]
• Abbreviation
AUS : Australian model
E4 : African model
EA : Saudi Arabia model
LA9 : Latin-American model
MY : Malaysia model
RU : Russian model
TH : Thai model
– Back Panel –
HOMEAUDIO SYSTEM
~ 120-240 V 50/60 Hz 220 W Manufactured under license from Dolby
Laboratories. Dolby and the double-D
symbol are trademarks of Dolby Laboratories
HECHOEN MALASIA
Only for Mexico / Sólo para México
Only for Chile / Sólo para Chile
HomologaciònNo: XXXXXXXXX-XXXX
Modelo:DHSR-SY30
Marca:Wistron NeWeb Corporation
HomologaciònNo: XXXXXXXXX-XXXX
Modelo:DHSR-SY25
Marca:Wistron NeWeb Corporation
N0.SERIE/
NƖSERIE
0000005
NOM
NYCE
05/2016
MODEL NO. / MODELO : MHC-V77DW
R
4-595-019-01LA9

MHC-V77DW
5
PLAYABLE DISCS
• AUDIO CD
• CD-R/CD-RW/DVD-R/DVD-RW
– audio data
– MP3 files that conforms to ISO9660 Level 1/Level 2, or
Joliet (expansion format).
Notes
• MP3 (MPEG 1 Audio Layer-3) is a standard format defined
by ISO (International Organization for Standardization) which
compresses audio data. MP3 files must be in MPEG 1 Audio
Layer-3 format.
• The system can only play back MP3 files that have a file
extension of “.mp3”.
• JIG
When disassembling the set, use the following jig (for front
panel removal).
Part No.: J-2501-238-A JIG FOR SPEAKER REMOVAL
NOTE OF REPLACING THE IC8001 AND IC8003 ON
THE 89G BOARD
IC8001 and IC8003 on the 89G board cannot exchange with
single. When these parts on the 89G board are damaged, exchange
the entire mounted board.
NOTE OF REPLACING THE IC6001, IC6002, IC6202,
IC6203, IC6341, IC6342, IC6602, IC6901 AND IC6907
ON THE BENTEN-MOTHERBOARD BOARD
IC6001, IC6002, IC6202, IC6203, IC6341, IC6342, IC6602,
IC6901 and IC6907 on the BENTEN-MOTHERBOARD board
cannot exchange with single. When these parts on the BENTEN-
MOTHERBOARD board are damaged, exchange the entire
mounted board.
NOTE OF REPLACING THE IC8902 ON THE FM-
TUNER BOARD
IC8902 on the FM-TUNER board cannot exchange with single.
When this part on the FM-TUNER board is damaged, exchange
the entire mounted board.
NOTE OF REPLACING THE IC001 AND IC002 ON
THE SENSOR BOARD
IC001 and IC002 on the SENSOR board cannot exchange with
single. When these parts on the SENSOR board are damaged,
exchange the entire mounted board.
NOTE OF REPLACING THE CUSHION REAR ON THE
COVER REAR ASSY
When the cover rear assy is disassembled from the set, replace the
old cushion rear on the cover rear assy with a new cushion rear.
cushion, rear
cover, rear assy
NOTE OF REPLACEMENT OF THE MS-476 BOARD
When the MS-476 board is defective, exchange the entire
LOADING COMPLETE ASSY (T).
IMPORTANT NOTE OF REPLACING THE BENTEN-
MOTHERBOARD BOARD
When the BENTEN-MOTHERBOARD board is replaced, be sure
to perform the following work.
1. Stick the new MAC address label on the rear side of this unit.
• Sticking method of MAC address label
2. Perform the connection check of wireless LAN (Refer to
“CHECKING METHOD OF WIRELESS LAN CONNEC-
TION” on this page).
3. The MAC address has been changed. Print the following
explanations, and pass it to the customer together with repaired
unit.
Note of the MAC address change:
The MAC address of this unit was changed along with this repair.
Please set it again if you are using the MAC address filtering
function of access point device connection destination.
When registration of client devices to the DLNA server device
is not automatic, it is necessary to register this unit into a server
again.
MAC address is displayed on rear side of this unit.
MAC1: MAC address of LAN(100)
MAC2: MAC address of wireless LAN
CHECKING METHOD OF WIRELESS LAN CONNEC-
TION
When the BENTEN-MOTHERBOARD board is replaced, be sure
to perform the connection check of wireless LAN.
Required item:
• Wireless router with the Wi-Fi Protected Setup™ (WPS)
button
Procedure:
1. Press the [1] (power) button to turn on the system.
When the system is on, the power indicator lights up in green.
1
– Rear view –
location of MAC
address label
HOMEAUDIO SYSTEM
~ 120-240 V 50/60 Hz 220W Manufactured under license from Dolby
Laboratories.Dolby and the double-D
symbolare trademarks of Dolby Laboratories
HECHOEN MALASIA
Onlyfor Mexico / Sólo para México
Onlyfor Chile / Sólo para Chile
HomologaciònNo: XXXXXXXXX-XXXX
Modelo:DHSR-SY30
Marca:Wistron NeWeb Corporation
HomologaciònNo: XXXXXXXXX-XXXX
Modelo:DHSR-SY25
Marca:Wistron NeWeb Corporation
N0.SERIE/
NƖSERIE
0000005
NOM
NYCE
05/2016
MODELNO. / MODELO : MHC-V77DW
R
4-595-019-01LA9

MHC-V77DW
6
2. Touch and hold WPS key on the unit until the NETWORK
indicator flashes in white.
NETWORK
WPS
3. Within 90 seconds, press the Wi-Fi Protected SetupTM (WPS)
button of the router.
When the NETWORK indicator lights up in white, the Wi-Fi
network connection is complete.
NETWORK
NETWORK
m
WPS
Depending on the wireless router, press and hold the WPS button
for a few seconds. For details, refer to the operating instructions
of your router.
• The WPS button may be called “AOSS button” depending on
the wireless router.
IMPORTANT NOTE OF DHSR-SY30 AT BENTEN-
MOTHERBOARD BOARD
Be sure to plug in the HARNESS, COAXIAL to DHSR-SY30
after replacing the BENTEN-MOTHERBOARD board.
DHSR-SY30
HARNESS, COAXIAL
FROM ANTENNA BOARD
BENTEN-MOTHERBOARD
BOARD
BOND FIXATION OF ELECTRIC PARTS
When 2CH DAMP board is replaced, it is necessary to fix parts to
the boards by using a specified bond without fail.
• Object boards
Complete 2CH DAMP board
• Use bond
1) SILICONE RTV ADHESIVE (UB-501G) 300ML
2) HM-40 (E318202) 300ML
• Parts position
1. 2CH DAMP board (page 6)
1. 2CH DAMP board
C1094
C1093
– 2CH DAMP Board (Component Side) –
The portion which applies bond:

MHC-V77DW
7
BOND FIXATION OF ELECTRICAL PARTS
When switching regulator (SSN-161AD) is replaced, fix the
electrical parts by using the bond (SC608Z2).
• Object board
1. REGULATOR, SWITCHING (SSN-161AD) board
• Use bond
Part No. Description
7-600-020-70 ADHESIVE (SC608Z2) 180ML
• Parts position
1. REGULATOR, SWITCHING (SSN-161AD) board
(page 7)
1. REGULATOR, SWITCHING (SSN-161AD) board
– SWITCHING REGULATOR (Component Side) –
Z1
C3 C8 L1
LF1
C27
R40
C34
C17
C21 C22
C35 R14
C47
R62
R112 R105
R109 R107
R15
R40 C18 C20 C20 C35
SR1
R47
R50
SR1 Q14
T2
L1
T2
TP1
The portion which applies bond:
TEST DISCS
Use following TEST DISC when this unit confirms the operation
and checks it.
• For CD
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
• For DVD SL (Single Layer)
Part No. Description
J-6090-069-A DISC (HLX-503), TEST (NTSC)
J-6090-088-A DISC (HLX-504), TEST (NTSC)
J-2501-305-A DISC (HLX-513), TEST (NTSC)
J-6090-077-A DISC (HLX-506), TEST (PAL)
• For DVD DL (Double Layer)
Part No. Description
J-6090-071-A DISC (HLX-501), TEST (NTSC)
J-6090-089-A DISC (HLX-505), TEST (NTSC)
J-2501-306-A DISC (HLX-514), TEST (NTSC)
J-6090-078-A DISC (HLX-507), TEST (PAL)
RELEASING THE DISC TRAY LOCK
The disc tray lock function for the antitheft of sample disc in the
shop is equipped.
It can release the lock function in the following procedure.
Releasing Procedure:
1. Press the [1] button to turn the power on.
2. Touch the [FUNCTION] touch key to turn the DVD/CD func-
tion.
3. Touch [x] and [MIC LEVEL +] touch keys simultaneously for
three seconds.
4. The message “UNLOCKED” is displayed on the screen
display panel and the disc tray is unlocked.
Note: When “LOCKED” is displayed on the screen display panel, the
disc tray lock is not released by turning the power on/off with the
[1] button.
IF “PROTECTX” (X IS A
NUMBER) APPEARS IN THE
DISPLAY PANEL
Immediately unplug the AC
power cord (mains lead), and
check if anything is blocking the
ventilation openings of the unit.
After you have checked and
found no problems, reconnect
the AC power cord (mains lead),
and turn on the system. If the
issue persists, contact your
nearest Sony dealer.

MHC-V77DW
8
HOW TO OPEN THE TRAY WHEN POWER SWITCH TURN OFF
Note 1: After the side case and top panel block are removed, this work is done.
Note 2: Please prepare the thin wire (clip etc. processed to the length of 8 cm or more).
2Insert the clip etc.
– Top view –
DVD mechanism
deck
tray
8 cm or more
Insert the clip etc. processed to the
length of 8 cm or more in the hole
on the side of the CDM and push.
Note: Push after it inserts it
in this hole well.
– Left view – hole
3
1Remove the rear cover assy, side-L panel.
(Illustration of disassembly is omitted.)

MHC-V77DW
9
CAPACITOR ELECTRICAL DISCHARGE PROCESSING
When checking the board, for the electric shock prevention, con-
nect the resistors to respective parts to discharge.
Discharge at capacitor (Ref. No C27)
Discharge method 1
Connect the resistors to both ends of capacitor (Ref. No. C27) on
the switching regulator (SSN-161AD) to discharge.
– SWITCHING REGULATOR (Conductor Side) –
800 :/5 W
(for C27)
Discharge method 2
When connecting the resistor to both ends of capacitor (Ref.
No. C27) on the switching regulator (SSN-161AD) is difficult,
discharge by connecting the resistor between fuse (Ref. No. F4)
and jumper (Ref. No. J26, J24, J94).
Note: Be careful not to short-circuit, because between the terminal is close.
– SWITCHING REGULATOR (Component Side) –
F4
800 :/5 W
J26
J74
J94
Discharge at capacitor (Ref. No C18 and C20)
Discharge by connecting the resistor between pin 1, 2 (+VH) and
pin 8, 9 (–VH) of connector (Ref. No, CN2) on the switching
regulator board.
– SWITCHING REGULATOR Board (Component Side) –
CN2
800 :/5 W
Pin 1 Pin 10

MHC-V77DW
10
Note: Disassemble the unit in the order as shown below.
2-1. DISASSEMBLY FLOW
SECTION 2
DISASSEMBLY
2-3. SIDE-L PANEL
(Page 11)
2-4. PANEL LOADING SECTION
(Page 12)
2-5. TOP PANEL SECTION
(Page 13)
2-2. REAR COVER ASSY
(Page 11)
2-6. SIDE-R PANEL
(Page 14)
2-7. CDM SECTION
(Page 15 )
2-8. CDM90-DVBU204//M
(Page 15 )
2-13. REGULATOR, SWITCHING
(SSN-161AD)
(Page 20)
2-10. BACK PANEL SECTION
(Page 17)
2-15. LOUDSPEAKER (260MM)-180-11
(WOOFER) (SP5)
(Page 22)
2-16. LOUDSPEAKER
(120MM)-181-11
(MID: L-CH) (SP1),
LOUDSPEAKER
(120MM)-181-11
(MID: R-CH) (SP3)
(Page 22)
2-9. SERVICE, OPTICAL DEVICE (7G),
FLEXIBLE FLAT CABLE
(Page 16)
SET
2-14. FRONT PANEL SECTION
(Page 21)
2-11. 2CH DAMP BOARD
(Page 18)
2-12. BENTEN-MOTHERBOARD BOARD,
89G BOARD
(Page 19)

MHC-V77DW
11
Note: Follow the disassembly procedure in the numerical order given.
2-2. REAR COVER ASSY
2-3. SIDE-L PANEL
2three screws
(flathead (TP))
2four screws
(flathead (TP))
3three screws
(flathead (TP))
5Slide the panel side, L
in the direction of the arrow.
6panel side, L
4Lift up the top panel section
in the direction of the arrow. 1two screws
(+BVTP 3 u8)
3 cover, rear assy
Note 2: There is cushion rear at the top of the cover, rear assy.
Remove the cover, rear assy gently to avoid from
being broken.
1three screws
(flathead (TP))
2three screws
(+BVTP 3 u10)
2five screws
(+BVTP 3 u10)
Note 1: When the cover rear assy is disassembled from the
set, refer “NOTE OF REPLACING THE CUSHION
REAR ON THE COVER REAR ASSY” on page 5.

MHC-V77DW
12
2-4. PANEL LOADING SECTION
1Insert the clip etc.
2Draw out the tray.
3three claws
4panel loading
section
– Top view –
DVD mechanism
deck
tray
8 cm or more
Insert the clip etc. processed to the
length of 8 cm or more in the hole
on the side of the CDM and push.
Note: Push after it inserts it
in this hole well.
– Left view – hole

MHC-V77DW
13
2-5. TOP PANEL SECTION
2Remove the
panel, top section
in the direction
of the arrow.
3filament tape
0panel, top section
1two screws
(flathead (TP))
4dual-band dipole
antenna connector
5wire (flat type)
(29 core) (CN3902)
9CN1009 (8P)
7cushion, seal
8clamp, sleeve ferrite
front side MIC board
pin, lead
CDM section
Note 2: When you install the connector, please install them correctly.
There is a possibility that this machine damages when not
correctly installing it.
Insert is shallow
Insert is straight
to the interior.
connector
Insert is incline
connector connector connector
connector connector
Note 1: When installing the wire (flat type), ensure that
the colored line is not slanted after insertion.
colored line colored line
Insert is straight to the interior. Insert is incline
wire (flat type) wire (flat type)
connectorconnector
OK NG
OK NG NG
:LUHVHWWLQJ
6wire (flat type)
(7 core) (CN6203)
$(38.580<$86

MHC-V77DW
14
2-6. SIDE-R PANEL
2two screws
(flathead (TP))
2two screws
(flathead (TP))
1two screws
(+BVTP 3 u8)
3one screw
(+BVTP 3 u8)
4wire (flat type)
(29 core) (CN6850)
7panel, side-R section
5CN6801 (4P)
6Remove the
panel, side-R
in the direction
of the arrow.
Note 2: When you install the connector, please install them correctly.
There is a possibility that this machine damages when not
correctly installing it.
Insert is shallow
Insert is straight
to the interior.
connector
Insert is incline
connector connector connector
connector connector
Note 1: When installing the wire (flat type), ensure that
the colored line is not slanted after insertion.
colored line colored line
Insert is straight to the interior. Insert is incline
wire (flat type) wire (flat type)
connectorconnector
OK NG
OK NG NG

MHC-V77DW
15
2-7. CDM SECTION
2-8. CDM90-DVBU204//M
1two screws
(+BVTP 3 u8)
2one screw
(+BVTP 3 u8)
2one screw
(+BVTP 3 u8)
3filament tape
8CDM block
4flexible flat cable
(24 core) (CN8001)
5flexible flat cable
(5 core) (CN8401)
6CN8400 (6P)
7Remove the CDM section
in the direction of the arrow.
Note 2: When you install the connector, please install them correctly.
There is a possibility that this machine damages when not
correctly installing it.
Insert is shallow
Insert is straight
to the interior.
connector
Insert is incline
connector connector connector
connector connector
OK NG NG
Note 1: When installing the flexible flat
cable, ensure that the colored line
is not slanted after insertion.
colored line
Insert is straight to the interior.
connector
OK
colored line
Insert is incline
connector
NG
flexible flat
cable
flexible flat
cable
1four screws
(BVTP3 u8)
7CDM90-DVBU204//M
3Draw two wires out of
the hole in bracket CDM
section.
6bracket CDM section
4cushion, saranet (30X50)
5core, ferrite
2Draw wire out of
the hole in bracket CDM
section.

MHC-V77DW
16
2-9. SERVICE, OPTICAL DEVICE (7G), FLEXIBLE FLAT CABLE
Under the guide
Under the guide
(Fold area)
,QVWDOODWLRQRIIOH[LEOHIODWFDEOH3DQGIOH[LEOHIODWFDEOH3
Note: This illustration sees the loading assy (T) from bottom side.
1flexible flat cable (24P)
2Through the hole
3Through the hole
4
terminal face
loading assy (T)
7flexible flat cable
(24P)
6holder, FFC
5three claws
5two claws
8flexible flat cable
(5P)
9filament tape
8four insulator screws
7connector
qa insulator
6belt
3Insert the thin
wire (clip etc.).
5tray
qs service,
optical device (7G)
qa insulator
qa insulator
qg
qk flexible flat cable
(24P)
1 six claws
4
9
0
2chuck holder assy (T)
qh flexible flat cable
(5P)
qf filament tape
– Bottom view –
loading assy (T)
qd loading base assy
qj holder, FFC

MHC-V77DW
17
2-10. BACK PANEL SECTION
clamp 2CH DAMP board
:LUHVHWWLQJ
rear
side
–7RSUHDUYLHZ–
9CN1002 (2P)
7two screws
(+BVTP 3 u8)
6two screws
(+BVTP 3 u8)
1two screws
(rivet (DIA. 3), nylon)
3one screw
(rivet (DIA. 3), nylon)
2cover, jack
4cover, LAN
5one screw
(+B 3 u6)
qa panel, back section
8Wire is removed
from the clamp.
0wire (flat type)
(9 core) (CN6402)
Note 2: When you install the connector, please install them correctly.
There is a possibility that this machine damages when not
correctly installing it.
Insert is shallow
Insert is straight
to the interior.
connector
Insert is incline
connector connector connector
connector connector
Note 1: When installing the wire (flat type), ensure that
the colored line is not slanted after insertion.
colored line colored line
Insert is straight to the interior. Insert is incline
wire (flat type) wire (flat type)
connectorconnector
OK NG
OK NG NG

MHC-V77DW
18
2-11. 2CH DAMP BOARD
clampcushion (QJ, S)
2CH DAMP board
0two screws
(+PTPWH 2.6 uL (DIA8.0)
:LUHVHWWLQJ
rear
side
2Wire is removed
from the clamp.
3CN1004 (8P)
6CN1003
(6P)
7three screws
(+BVTP 3 u8)
9plate, shield D-AMP
qf two screws
(+BVTP 3 u8)
qh bracket, heat sink
qd 2CH DAMP board
7one screw
(+BVTP 3 u8)
qa heat sink, AMP
qs sheet, thermal
8clamp
qg Remove the
bracket, heat sink
in the direction
of the arrow.
1wire (flat type)
(17 core) (CN1001)
Note 2: When you install the connector, please install them correctly.
There is a possibility that this machine damages when not
correctly installing it.
Insert is shallow
Insert is straight
to the interior.
connector
Insert is incline
connector connector connector
connector connector
Note 1: When installing the wire (flat type), ensure that
the colored line is not slanted after insertion.
colored line colored line
Insert is straight to the interior. Insert is incline
wire (flat type) wire (flat type)
connectorconnector
OK NG
OK NG NG
4cushion, seal
5core, ferrite
$(38.58
0<$86

MHC-V77DW
19
2-12. BENTEN-MOTHERBOARD BOARD, 89G BOARD
1CN6401
(4P)
6CN6901 (9P)
7CN6851 (3P)
2filament tape
4CN6802 (3P)
9four screws
(+BVTP 3 u8)
qa two screws
(+BVTP 3 u8)
qs 89G board
0BENTEN-MOTHERBOARD board
BENTEN-MOTHERBOARD board
3ANTENNA board
harness coaxial connector
ANTENNA board
harness coaxial connector
5wire (flat type)
(6 core) (CN6202)
8wire (flat type)
(29 core) (CN7001)
Note 3: When you install the connector, please install them correctly.
There is a possibility that this machine damages when not
correctly installing it.
Insert is shallow
Insert is straight
to the interior.
connector
Insert is incline
connector connector connector
connector connector
Note 2: When installing the wire (flat type), ensure that
the colored line is not slanted after insertion.
colored line colored line
Insert is straight to the interior. Insert is incline
wire (flat type) wire (flat type)
connectorconnector
OK NG
OK NG NG
:LUHVHWWLQJ
rear side
Note 1: When the BENTEN-MOTHERBOARD board is replaced,
refer to “IMPORTANT NOTE OF REPLACING THE
BENTEN-MOTHERBOARD BOARD” on page 5 and “IM-
PORTANT NOTE OF DHSR-SY30 AT BENTEN-MOTH-
ERBOARD BOARD” on page 6.

MHC-V77DW
20
2-13. REGULATOR, SWITCHING (SSN-161AD)
2three screws
(+BVTP 3 u8)
2two screws
(+BVTP 3 u8)
3one screw
(+BVTP 3 u8)
6one screw
(+PWH 3 u8
(SUMITITE))
qd two step screws
M4
qf chassis block
qd two step screws
M4
qs REGULATOR, SWITCHING
(SSN-161AD)
6eight screws
(+PWH 3 u8 (SUMITITE))
4clamp
7clamp
8CN1
0core, ferrite
9himelon 45
5sub, chassis
clamp
hole REGULATOR, SWITCHING
(SSN-161AD)
REGULATOR, SWITCHING
(SSN-161AD)
:LUHVHWWLQJ
:LUHVHWWLQJ
rear
side
1one screw
(+BVTP 3 u8)
qa Remove the wire from the hole.
Note : When you install the connector, please install them correctly.
There is a possibility that this machine damages when not
correctly installing it.
Insert is shallow
Insert is straight
to the interior.
connector
Insert is incline
connector connector connector
connector connector
OK NG NG
E
E