STR-DH550, STR-DH750 — Sony Audio Service Manual (repair manual)

Model
STR-DH550 STR-DH750
Pages
80
Size
5.92 MB
Type
PDF
Document
Service Manual
Brand
Device
Audio
File
str-dh550-str-dh750.pdf
Date

View Sony STR-DH550 / STR-DH750 Service Manual online

SERVICE MANUAL
Published by Sony EMCS (Malaysia) PG Tec
Sony Corporation
MULTI CHANNEL AV RECEIVER
US Model
Canadian Model
AEP Model
UK Model
Australian Model
STR-DH550/DH750
E Model
STR-DH550
Brazillian Model
Mexican Model
Taiwan Model
STR-DH750
Ver. 1.2  2015.04
STR-DH550/DH750
9-890-636-03
2015D80-1
© 
2015.04
Photo: STR-DH750
SPECIFICATIONS
– Continued on next page –
This receiver incorporates Dolby* Digital and Pro 
Logic Surround and the DTS** Digital Surround 
System.
Manufactured under license from Dolby 
Laboratories. Dolby, Pro Logic, Surround EX, 
and the double-D symbol are trademarks of Dolby 
Laboratories.
** 
For DTS patents, see http://patents.dts.com. 
Manufactured under license from DTS Licensing 
Limited. DTS, DTS-HD, the Symbol, & DTS and 
the Symbol together are registered trademarks, and 
DTS-HD Master Audio is a trademark of DTS, Inc. 
© DTS, Inc. All Rights Reserved.
This receiver 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.
iPhone, iPod, iPod classic, iPod nano, 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.
All other trademarks and registered trademarks are 
of their respective holders. In this manual, ™ and ® 
marks are not specified.
“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.
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.
MPEG Layer-3 audio coding technology and patents 
licensed from Fraunhofer IIS and Thomson.
“x.v.Color (x.v.Colour)” and “x.v.Color (x.v.Colour)” 
logo are trademarks of Sony Corporation.
“BRAVIA” is a trademark of Sony Corporation.
“PlayStation” is a registered trademark of Sony Com-
puter Entertainment Inc.
“WALKMAN” and “WALKMAN” logo are registered 
trademarks of Sony Corporation.
MICROVAULT is a trademark of Sony Corporation.
MHL, Mobile High-Definition Link and the MHL 
Logo are trademarks or registered trademarks of MHL 
Licensing, LLC.
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.
© 2013 CSR plc and its group companies. The aptX® 
mark and the aptX logo are trade marks of CSR plc or 
one of its group companies and may be registered in 
one or more jurisdictions.
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.
AUDIO POWER
SPECIFICATIONS
POWER OUTPUT AND TOTAL
HARMONIC DISTORTION:
(USA model only)
With 6 ohm loads, both channels driven, from 
20 – 20,000 Hz; rated 90 watts per channel minimum 
RMS power, with no more than 0.09% total harmonic 
distortion from 250 milliwatts to rated output.
Amplifier section
Mexico model
Minimum RMS Output Power
1)
(6 ohms, 20 Hz – 20 kHz, THD 0.09%)
 
90 W + 90 W
Stereo Mode Output Power
1)
(6 ohms, 1 kHz, THD 1%)
 
100 W + 100 W
Surround Mode Output Power
1) 2)
(6 ohms, 1 kHz, THD 0.9%)
 
140 W per channel
India model
Minimum RMS Output Power
1)
(6 ohms, 20 Hz – 20 kHz, THD 0.09%)
 
80 W + 80 W
Stereo Mode Output Power
1)
(6 ohms, 1 kHz, THD 1%)
 
90 W + 90 W
Surround Mode Output Power
1) 2)
(6 ohms, 1 kHz, THD 0.9%)
 
115 W per channel
Other models
Minimum RMS Output Power
1)
(6 ohms, 20 Hz – 20 kHz, THD 0.09%)
 
90 W + 90 W
Stereo Mode Output Power
1)
(6 ohms, 1 kHz, THD 1%)
 
105 W + 105 W
Surround Mode Output Power
1) 2)
(6 ohms, 1 kHz, THD 0.9%)
 
145 W per channel
1)
 Measured under the following conditions:
Area
Power requirements
US, CND, 
TW
120 V AC, 60 Hz
MX
127 V AC, 60 Hz
AUS, AEP, 
UK
230 V AC, 50 Hz
BR
220 V AC, 60 Hz
E12
240 V AC, 50 Hz
2)
 Reference power output for front, center, surround, 
surround back and front high speakers. Depending 
on the sound fi eld settings and the source, there 
may be no sound output.
Frequency response
 Analog
 
10 Hz – 100 kHz, +0.5/–2 dB (with 
 sound 
fi eld and equalizer bypassed)
Input
 Analog
 
Sensitivity: 500 mV/50 kilohms
 S/N
3)
: 105 dB (A, 500 mV
4)
)
 Digital 
(Coaxial)
 
Impedance: 75 ohms 
 
S/N: 100 dB (A, 20 kHz LPF)
 Digital 
(Optical)
 
S/N: 100 dB (A, 20 kHz LPF)
Output (Analog)
 SUBWOOFER
 
Voltage: 2 V/1 kilohm
Equalizer
 Gain 
levels
 
±10 dB, 1 dB step
3) 
INPUT SHORT (with sound fi eld and equalizer 
bypassed).
4) 
Weighted network, input level.
FM tuner section
Tuning range
 
87.5 MHz – 108.0 MHz
Antenna (aerial)
 
FM wire antenna (aerial)
Antenna (aerial) terminals
 
75 ohms, unbalanced
AM tuner section
Tuning range
Area
Tuning scale
10 kHz step 
9 kHz step
US, CND,
MX, BR
530 kHz – 
531 kHz –
1,710 kHz 
1,710 kHz
AUS, AEP, 
UK, TW, E12
        – 
531 kHz –
 1,602 
kHz
Antenna (aerial)
 
Loop antenna (aerial)
Video section
Inputs/Outputs
 Video:
 
1 Vp-p, 75 ohms
STR-DH550/DH750
2
1)
 Supports YUV 4:2:0 / 8 bit format only.
2)
 Supports 8 bit format only.
3)
 These formats are also supported by an MHL connection.
MHL section
Supported MHL version
 
Incorporates MHL 2
Maximum current
 900 
mA
iPhone/iPod section
DC 5V 1.0 A MAX
USB works with iPhone 5s, iPhone 5c, iPhone 5, iPhone 4s, 
iPhone 4, iPhone 3GS, iPhone 3G, iPod touch (2nd through 
5th generation), iPod classic, and iPod nano (3rd through 7th 
generation).
Bluetooth technology works with iPhone 5s, iPhone 5c, iPhone 
5, iPhone 4s, iPhone 4, iPhone 3GS, and iPod touch (4th and 5th 
generation).
You can use “SongPal” app with this receiver via Bluetooth.
USB section
Supported format*
 
MP3 (MPEG 1 Audio Layer-3):
 
32 kbps – 320 kbps, VBR
 WMA:
 
48 kbps – 192 kbps
 AAC:
 
48 kbps – 320 kbps
 WAV:
 
8 kHz – 48 kHz, 16 bit PCM
* Compatibility with all encoding/writing software, recording 
  devices and recording media cannot be guaranteed.
Transfer speed
 Full-speed
Supported USB device
 
Mass Storage Class
Maximum current
 500 
mA
Bluetooth section
Communication system
 
Bluetooth Specification version 3.0
Output
 
Bluetooth Specification Power Class 2
Maximum communication range
 
Line of sight approx. 10 m (33 feet)
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)
Supported Codecs
3)
 SBC
4)
, AAC, aptX
Transmission range (A2DP)
 
20 Hz – 20,000 Hz (Sampling frequency 44.1 kHz)
1) 
The actual range will vary depending on factors such as 
obstacles between devices, magnetic fields around a microwave 
oven, static electricity, cordless phone, reception sensitivity, 
antenna’s performance, operating system, software application, 
etc.
2) 
Bluetooth standard profiles indicate the purpose of Bluetooth 
communication between devices.
3) 
Codec: Audio signal compression and conversion format
4) 
Subband Codec
General
Power requirements
Area
Power requirements
US, CND, TW
120 V AC, 60 Hz
MX
127 V AC, 60 Hz
AUS
230 V AC, 50 Hz
AEP, UK, E12
230 V AC, 50/60 Hz
BR
127/220 V AC, 60 Hz
E12
220 V – 240 V AC, 50/60 Hz
Power consumption
 
240 W (Except DH550 : AEP, UK, US, CND, AUS, E12)
 
200 W (DH550 : AEP, UK, US, CND, AUS, E12)
Power consumption (during standby mode)
 
0.3 W (When “Control for HDMI”, “Pass Through” and 
 
“Bluetooth Standby” are set to “Off”.)
 
0.5 W (When “Control for HDMI” is set to “On”, “Pass 
 
Through” and “Bluetooth Standby” are set to “Off”.)
Dimensions (width/height/depth) (Approx.)
 
430 mm × 156 mm × 329.4 mm
 
(17 in × 6 1/4 in × 13 in) including projecting parts and 
 controls
Mass (Approx.)
E12 model:
 
8.0kg (17 lb 11 oz)
Other models:
 
7.6kg (16 lb 13 oz)
Design and specifications are subject to change without notice.
HDMI Video
Input/Output (HDMI Repeater block)
Format
2D
3D
Frame packing
Side-by-Side 
(Half)
Over-Under 
(Top-and-Bottom)
4096 × 2160p @ 59.94/60 Hz
a
1)
4096 × 2160p @ 50 Hz
a
1)
3840 × 2160p @ 59.94/60 Hz
a
1)
3840 × 2160p @ 50 Hz
a
1)
4096 × 2160p @ 23.98/24 Hz
a
2)
3840 × 2160p @ 29.97/30 Hz
a
2)
3840 × 2160p @ 25 Hz
a
2)
3840 × 2160p @ 23.98/24 Hz
a
2)
1920 × 1080p @ 59.94/60 Hz
a
a
a
1920 × 1080p @ 50 Hz
a
a
a
1920 × 1080p @ 29.97/30 Hz
a
3)
a
a
3)
a
3)
1920 × 1080p @ 25 Hz
a
3)
a
a
3)
a
3)
1920 × 1080p @ 23.98/24 Hz
a
3)
a
a
3)
a
3)
1920 × 1080i @ 59.94/60 Hz
a
3)
a
a
3)
a
3)
1920 × 1080i @ 50 Hz
a
3)
a
a
3)
a
3)
1280 × 720p @ 59.94/60 Hz
a
3)
a
a
3)
a
3)
1280 × 720p @ 50 Hz
a
3)
a
a
3)
a
3)
1280 × 720p @ 29.97/30 Hz
a
3)
a
a
3)
a
3)
1280 × 720p @ 23.98/24 Hz
a
3)
a
a
3)
a
3)
720 × 480p @ 59.94/60 Hz
a
3)
720 × 576p @ 50 Hz
a
3)
640 × 480p @ 59.94/60 Hz
a
3)
Supplied accessories
•  Quick Setup Guide (1)
•  Reference Guide (1)
•  Remote control (RM-AAU190) (1) 
•  R6 (size AAA) batteries (2)
•  FM wire antenna (aerial) (1)
•  AM loop antenna (aerial) (1)
•  Optimizer microphone (ECM-AC2) (1)
Design and specifications are subject to change 
without notice.
 
 Halogenated  flame retardants are not used 
in the certain printed wiring boards.
Abbreviation
AUS : Australian model
BR : 
Brazilian 
model
CND : Canadian model
E12  : 220 – 240V AC area in E model
MX : 
Mexican 
model
TW : 
Taiwan 
model
Ver. 1.1
STR-DH550/DH750
3
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 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.
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.
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.
1. 
SERVICING  NOTES 
 .............................................  
4
2. DISASSEMBLY
2-1. Case 
(Entry) 
....................................................................   5
2-2.  Front Panel Section .........................................................   6
2-3.  Back Panel Section .........................................................   7
2-4.  MAIN Board Section ......................................................   8
2-5. MAIN 
Board 
...................................................................   9
3. 
TEST  MODE 
 ............................................................   10
4. 
FM  TUNER  CHECK 
 .............................................   13
5. DIAGRAMS
5-1.  Block Diagram - ANALOG AUDIO Section - ...............   15
5-2.  Block Diagram - DIGITAL Section - .............................   16
5-3.  Block Diagram - AMP Section - .....................................   17
5-4.  Block Diagram - ANALOG VIDEO/USB Section - ......   18
5-5.  Block Diagram - DIGITAL VIDEO Section - ................   19
5-6.  Block Diagram - DISPLAY/POWER Section - ..............   20
5-7. Printed 
Wiring 
Board 
- MAIN Board (Component Side) - ................................   22
5-8. Printed 
Wiring 
Board 
- MAIN Board (Conductor Side) - ..................................   23
5-9.  Schematic Diagram - MAIN Board (1/7) - .....................   24
5-10.  Schematic Diagram - MAIN Board (2/7) - .....................   25
5-11.  Schematic Diagram - MAIN Board (3/7) - .....................   26
5-12.  Schematic Diagram - MAIN Board (4/7) - .....................   27
5-13.  Schematic Diagram - MAIN Board (5/7) - .....................   28
5-14.  Schematic Diagram - MAIN Board (6/7) - .....................   29
5-15.  Schematic Diagram - MAIN Board (7/7) - .....................   30
5-16. Printed Wiring Board 
- HDMI Board (Component Side) - ................................   31
5-17. Printed Wiring Board 
- HDMI Board (Conductor Side) - ..................................   32
5-18.  Schematic Diagram - HDMI Board - ..............................   33
5-19. Printed Wiring Board 
- STANDBY DCDC Board (Component Side) - ............   34
5-20. Printed Wiring Board 
- STANDBY DCDC Board (Conductor Side) - ..............   35
5-21.  Schematic Diagram - STANDBY DCDC Board - ..........   36
5-22.  Printed Wiring Board - PANEL Section - .......................   37
5-23.  Schematic Diagram - PANEL Section - ..........................   38
5-24.  Printed Wiring Board - FRONT JACK Board - ..............   39
5-25.  Schematic Diagram - FRONT JACK Board - ................   39
5-26.  Printed Wiring Board - TUNER1 Board - ......................   39
5-27.  Schematic Diagram - TUNER1 Board - .........................   40
5-28.  Printed Wiring Board - POWER KEY Board -...............   41
5-29.  Schematic Diagram - POWER KEY Board - .................   41
5-30.  Printed Wiring Board - HEADPHONE Board - .............   42
5-31.  Schematic Diagram - HEADPHONE Board - ................   42
6. 
EXPLODED  VIEWS
6-1.  Case (Entry) Section .......................................................   57
6-2.  Front Panel Section .........................................................   58
6-3.  Back Panel Section .........................................................   59
6-4. Chassis 
Section 
...............................................................  60
7. 
ELECTRICAL  PARTS  LIST 
 ..............................   61
TABLE  OF  CONTENTS
STR-DH550/DH750
4
MODEL IDENTIFICATION
–BACK PANEL–
Part No.
Model
Part No.
DH550: US, Canadian
4-487-917-0[]
DH550: AEP, UK
4-487-917-1[]
DH550: Australian
4-487-917-2[]
DH550: 220 – 240 V AC area in E model
4-487-917-3[]
DH750: US, Canadian
4-448-923-0[]
DH750: AEP, UK
4-448-923-1[]
DH750: Australian
4-448-923-2[]
DH750: Taiwan
4-448-923-3[]
DH750: Mexican
4-448-923-4[]
DH750: Brazillian
4-448-923-6[]
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.
SPECIAL  COMPONENT  NOTICE
The components identified by mark 
9 contain confidential 
information.
Strictly follow the instructions whenever the components are 
repaired and/or replaced.
NOTICE  POUR  COMPOSANTS  SPÉCIAUX
Les composants identifiés par la marque 
9 contiennent des 
informations confidentielles.
Suivre scrupuleusement les instructions chaque fois qu’un compo-
sant est remplacé et / ou réparé.
SECTION  1
SERVICING  NOTES
NOTE  OF  REPLACING  THE  IC2402  AND  IC2900  ON  
THE  MAIN  BOARD
IC2402 and IC2900 on the MAIN board cannot exchange with 
single. When these parts on the MAIN board are damaged, 
exchange the entire mounted board.
NOTE  OF  REPLACING  THE  IC3514  ON  THE  HDMI  
BOARD
IC3514 on the HDMI board cannot exchange with single. When 
this part on the HDMI board is damaged, exchange the entire 
mounted board.
NOTE  OF  REPLACING  THE  IC902  (DH750)  ON  THE  
STANDBY  DCDC  BOARD
IC902 (DH750) on the STANDBY DCDC board cannot exchange 
with single. When this part on the STANDBY DCDC board is 
damaged, exchange the entire mounted board.
CAPACITOR  ELECTRICAL  DISCHARGE  PROCESSING
When checking the board, the electrical discharge is necessary for 
the electric shock prevention.
Connect the resistor to both ends of respective capacitors.
• Main 
Board
 C930, 
C931
– MAIN BOARD (Conductor side) –
(To both ends of each capacitor)
800 
:/2 W
C930
C931
Ver. 1.1
STR-DH550/DH750
5
SECTION 2
DISASSEMBLY
Note:  This set can be disassemble according to the following sequence.
Note:  Follow the disassembly procedure in the numerical order given.
2-1.   CASE  (ENTRY)
3 three screws
 (+BVTP 
u 8)
4
4
2 three screws
 (B-TYPE 
u 8)
5 case (entry)
1 three screws
 (B-TYPE 
u 8)
2-1. CASE 
(ENTRY)
 (Page 
5)
2-2.  FRONT PANEL SECTION
 (Page 
6)
2-4.  MAIN BOARD SECTION
 (Page 
8)
2-3.  BACK PANEL SECTION 
 (Page 
7)
SET
2-5. MAIN 
BOARD
 (Page 
9)
Ver. 1.1

Download Sony STR-DH550 / STR-DH750 Service Manual (Repair Manual)

Here you can view online or download Sony STR-DH550 / STR-DH750 Service Manual in pdf. This Service Manual can help you recover, restore, fix, disassemble and repair Sony STR-DH550 / STR-DH750 Audio. Information contained in Sony STR-DH550 / STR-DH750 service manual (repair manual) typically includes:

  • Disassembly, troubleshooting, programming, maintenance, remote, adjustment, installation and setup instructions.
  • Schematics, wiring and block diagrams.
  • Printed wiring boards (PWB) and printed circuit boards (PCB).
  • Parts list (bill of materials).