Sony STR-DH740 Service Manual ▷ View online
SERVICE MANUAL
Sony Corporation
Published by Sony EMCS (Malaysia) PG Tec
MULTI CHANNEL AV RECEIVER
US Model
Canadian Model
AEP Model
Australian Model
Mexican Model
Taiwan Model
STR-DH740
Ver. 1.0 2013.01
9-890-616-01
2013A80-1
©
2013.01
AUDIO POWER SPECIFICATIONS
POWER OUTPUT AND TOTAL HARMONIC
DISTORTION:
(US 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.
Amplifi er section
Mexico model
1)
Minimum RMS Output Power
(6 ohms, 20 Hz – 20 kHz, THD 0.09%)
90 W + 90 W
Stereo Mode Output Power
(6 ohms, 1 kHz, THD 1%)
100 W + 100 W
Surround Mode Output Power
2)
(6 ohms, 1 kHz, THD 0.9%)
140 W per channel
Other models
1)
Minimum RMS Output Power
(6 ohms, 20 Hz – 20 kHz, THD 0.09%)
90 W + 90 W
Stereo Mode Output Power
(6 ohms, 1 kHz, THD 1%)
105 W + 105 W
Surround Mode Output Power
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
AEP, AUS
230 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.
SPECIFICATIONS
This receiver incorporates Dolby* Digital and Pro Logic Surround
and the DTS** Digital Surround System.
* M a n u f a c t u r e d u n d e r l i c e n s e f r o m D ol b y L a b o r a t o r ie s .
and the DTS** Digital Surround System.
* M a n u f a c t u r e d u n d e r l i c e n s e f r o m D ol b y L a b o r a t o r ie s .
Dolby, Pro Logic, Surround EX, and the double-D symbol are
trademarks of Dolby Laboratories.
trademarks of Dolby Laboratories.
** Manufactured under license under U.S. Patent Nos: 5,956,674;
5,974,380; 6,226,616; 6,487,535; 7,212,872; 7,333,929; 7,392,195;
7,272,567 & other U.S. and worldwide patents issued & pending.
DTS-HD, the Symbol, & DTS-HD and the Symbol together are
registered trademarks & DTS-HD Master Audio is a trademark
of DTS, Inc. Product includes software. © DTS, Inc. All Rights
Reserved.
7,272,567 & other U.S. and worldwide patents issued & pending.
DTS-HD, the Symbol, & DTS-HD and the Symbol together are
registered trademarks & DTS-HD Master Audio is a trademark
of DTS, Inc. Product includes software. © DTS, Inc. All Rights
Reserved.
This receiver incorporates High-Definition Multimedia Interface
(HDMI
(HDMI
TM
) technology. The terms HDMI and HDMI High-Defi nition
Multimedia Interface, and the HDMI Logo are trademarks or registered
trademarks of HDMI Licensing LLC in the United States and other
countries.
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.
of Apple Inc., registered in the U.S. and other countries.
All other t radema rks a nd registered t radema rks a re of thei r
respective holders. In this manual, ™ and ® marks are not specifi ed.
respective holders. In this manual, ™ and ® marks are not specifi ed.
“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 certifi ed 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.
accessory has been designed to connect specifically to iPod or
iPhone, respectively, and has been certifi ed 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.
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.
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.
Fraunhofer IIS and Thomson.
“x.v.Color (x.v.Colour)” and “x.v.Color (x.v.Colour)” logo are
trademarks of Sony Corporation.
trademarks of Sony Corporation.
“BRAVIA” is a trademark of Sony Corporation.
“ Play St at ion” i s a r eg i st e r e d t r a de m a r k of Sony C omput e r
Entertainment Inc.
Entertainment Inc.
“WALKMAN” is a registered trademark of Sony Corporation.
MICROVAULT is a trademark of Sony Corporation.
InstaPrevue™ is a trademark or registered trademark of Silicon
Image, Inc. in the United States and other countries.
Image, Inc. in the United States and other countries.
– Continued on next page –
2
STR-DH740
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.
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
FONCTIONNEMENT. NE REMPLACER CES COMPOSANTS
QUE PAR DES PIÈCES SONY DONT LES NUMÉROS SONT
DONNÉS DANS CE MANUEL OU DANS LES SUPPLÉ-
MENTS PUBLIÉS PAR SONY.
LES DIAGRAMMES SCHÉMATIQUES ET LA LISTE DES
PIÈCES SONT CRITIQUES POUR LA SÉCURITÉ DE
FONCTIONNEMENT. NE REMPLACER CES COMPOSANTS
QUE PAR DES PIÈCES SONY DONT LES NUMÉROS SONT
DONNÉS DANS CE MANUEL OU DANS LES SUPPLÉ-
MENTS PUBLIÉS PAR SONY.
FM tuner section
Tuning range
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
Tuning range
Area
Tuning scale
10 kHz step 9 kHz step
US, CND, MX
530 kHz – 531 kHz –
1,710 kHz 1,710 kHz
1,710 kHz 1,710 kHz
AEP, AUS, TW
–
531 kHz –
1,602
kHz
Antenna (aerial)
Loop antenna (aerial)
Video section
Inputs/Outputs
Video:
Inputs/Outputs
Video:
1 Vp-p, 75 ohms
iPod/iPhone section
DC 5V 1.0 A MAX
DC 5V 1.0 A MAX
USB section
Supported format*
Supported format*
MP3 (MPEG 1 Audio Layer-3):
32 kbps – 320 kbps, VBR
WMA: 48 kbps – 192 kbps
AAC: 48 kbps – 320 kbps
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,
*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
General
Power requirements
Power requirements
Area
Power requirements
US, CND, TW
120 V AC, 60 Hz
MX
127 V AC, 60 Hz
AEP, AUS
230 V AC, 50/60 Hz
Power consumption 240 W
Power consumption (during standby mode)
Power consumption (during standby mode)
0.3 W (When “Control for HDMI” and “Pass
Through” are set to “Off”.)
Through” 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.)
8.0 kg (17 lb 11 oz)
Design and specifi cations are subject to change without notice.
Supplied accessories
• Operating
• Operating
Instructions
•
Quick Setup Guide (1)
•
Remote control (RM-AAU168) (1)
•
R6 (size AA) batteries (2)
•
FM wire antenna (aerial) (1)
•
AM loop antenna (aerial) (1)
•
Optimizer microphone (ECM-AC2) (1)
• Abbreviation
AUS : Australian model
CND : Canadian model
MX : Mexican model
TW : Taiwan model
CND : Canadian model
MX : Mexican model
TW : Taiwan model
SAFETY CHECK-OUT (US MODEL)
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.
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 chas-
sis, 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-
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 chas-
sis, 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 Simp-
son 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)
analog meters must have an accurate low-voltage scale. The Simp-
son 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)
voltmeter
(0.75 V)
To Exposed Metal
Parts on Set
Parts on Set
Earth Ground
Fig. A. Using an AC voltmeter to check AC leakage.
3
STR-DH740
1.
SERVICING NOTES
............................................. 4
2. DISASSEMBLY
2-1. Case
(Entry)
.................................................................... 5
2-2. Front Panel Section ......................................................... 6
2-3. DCDC Board, STANDBY Board ................................... 7
2-4. Back Panel Section ......................................................... 8
2-5. MAIN Board Section ...................................................... 8
2-6. MAIN
2-3. DCDC Board, STANDBY Board ................................... 7
2-4. Back Panel Section ......................................................... 8
2-5. MAIN Board Section ...................................................... 8
2-6. 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
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
- DIGITAL Board (Component Side) - ........................... 22
5-8. Printed
Wiring
Board
- DIGITAL Board (Conductor Side) - ............................. 23
5-9. Schematic Diagram - DIGITAL Board (1/7) - ................ 24
5-10. Schematic Diagram - DIGITAL Board (2/7) - ................ 25
5-11. Schematic Diagram - DIGITAL Board (3/7) - ................ 26
5-12. Schematic Diagram - DIGITAL Board (4/7) - ................ 27
5-13. Schematic Diagram - DIGITAL Board (5/7) - ................ 28
5-14. Schematic Diagram - DIGITAL Board (6/7) - ................ 29
5-15. Schematic Diagram - DIGITAL Board (7/7) - ................ 30
5-16. Printed Wiring Board
5-10. Schematic Diagram - DIGITAL Board (2/7) - ................ 25
5-11. Schematic Diagram - DIGITAL Board (3/7) - ................ 26
5-12. Schematic Diagram - DIGITAL Board (4/7) - ................ 27
5-13. Schematic Diagram - DIGITAL Board (5/7) - ................ 28
5-14. Schematic Diagram - DIGITAL Board (6/7) - ................ 29
5-15. Schematic Diagram - DIGITAL Board (7/7) - ................ 30
5-16. Printed Wiring Board
- MAIN Board (Component Side) - ................................ 31
5-17. Printed Wiring Board
- MAIN Board (Conductor Side) - .................................. 32
5-18. Schematic Diagram - MAIN Board (1/4) - ..................... 33
5-19. Schematic Diagram - MAIN Board (2/4) - ..................... 34
5-20. Schematic Diagram - MAIN Board (3/4) - ..................... 35
5-21. Schematic Diagram - MAIN Board (4/4) - ..................... 36
5-22. Printed Wiring Board - DISPLAY Board - ..................... 37
5-23. Schematic Diagram - DISPLAY Board - ........................ 38
5-19. Schematic Diagram - MAIN Board (2/4) - ..................... 34
5-20. Schematic Diagram - MAIN Board (3/4) - ..................... 35
5-21. Schematic Diagram - MAIN Board (4/4) - ..................... 36
5-22. Printed Wiring Board - DISPLAY Board - ..................... 37
5-23. Schematic Diagram - DISPLAY Board - ........................ 38
TABLE OF CONTENTS
5-24. Printed Wiring Board - DCDC Board - .......................... 39
5-25. Schematic Diagram - DCDC Board - ............................. 40
5-26. Printed Wiring Board - STANDBY Board - ................... 41
5-27. Schematic Diagram - STANDBY Board - ...................... 42
5-28. Printed Wiring Board
5-25. Schematic Diagram - DCDC Board - ............................. 40
5-26. Printed Wiring Board - STANDBY Board - ................... 41
5-27. Schematic Diagram - STANDBY Board - ...................... 42
5-28. Printed Wiring Board
- FRONT JACK PWB Board - ....................................... 43
5-29. Schematic Diagram
- FRONT JACK PWB Board - ....................................... 43
5-30. Printed Wiring Board - TUNER1 Board - ...................... 43
5-31. Schematic Diagram - TUNER1 Board - ......................... 44
5-32. Printed Wiring Board - POWER KEY Board -............... 45
5-33. Schematic Diagram - POWER KEY Board - ................. 45
5-34. Printed Wiring Board - HEADPHONE Board - ............. 45
5-35. Schematic Diagram - HEADPHONE Board - ................ 45
5-31. Schematic Diagram - TUNER1 Board - ......................... 44
5-32. Printed Wiring Board - POWER KEY Board -............... 45
5-33. Schematic Diagram - POWER KEY Board - ................. 45
5-34. Printed Wiring Board - HEADPHONE Board - ............. 45
5-35. Schematic Diagram - HEADPHONE Board - ................ 45
6.
EXPLODED VIEWS
6-1. Case (Entry) Section ....................................................... 61
6-2. DCDC Board Section ...................................................... 62
6-3. Front Panel Section ......................................................... 63
6-4. Back Panel Section ......................................................... 64
6-5. Chassis
6-2. DCDC Board Section ...................................................... 62
6-3. Front Panel Section ......................................................... 63
6-4. Back Panel Section ......................................................... 64
6-5. Chassis
Section
............................................................... 65
7.
ELECTRICAL PARTS LIST
.............................. 66
4
STR-DH740
SECTION 1
SERVICING NOTES
Part No.
MODEL IDENTIFICATION
–BACK PANEL–
–BACK PANEL–
Model
Part No.
US, Canadian
4-448-712-0[]
AEP
4-448-712-2[]
Australian
4-448-712-3[]
Taiwan
4-448-712-4[]
Mexican
4-448-712-5[]
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.
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
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
• 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.
applied to the solder joint for a slightly longer time.
Soldering irons using a temperature regulator should be set to
about 350 °C.
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.
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.
also be added to ordinary solder.
Special Component Notice
The components identified by mark
The components identified by mark
9 contain confidential
information.
Strictly follow the instructions whenever the components are
repaired and/or replaced.
Strictly follow the instructions whenever the components are
repaired and/or replaced.
Notice pour composants spéciaux
Les composants identifiés par la marque
Les composants identifiés par la marque
9 contiennent des
informations confi dentielles.
Suivre scrupuleusement les instructions chaque fois qu’un com-
posant est remplacé et / ou réparé.
Suivre scrupuleusement les instructions chaque fois qu’un com-
posant est remplacé et / ou réparé.
NOTE OF REPLACING THE IC1902, IC1903 AND
IC1904 ON THE DCDC BOARD
IC1902, IC1903 and IC1904 on the DCDC board cannot exchange
with single. When these parts on the DCDC board are damaged,
exchange the entire mounted board.
IC1904 ON THE DCDC BOARD
IC1902, IC1903 and IC1904 on the DCDC board cannot exchange
with single. When these parts on the DCDC board are damaged,
exchange the entire mounted board.
NOTE OF REPLACING THE IC3506 ON THE DIGITAL
BOARD
IC3506 on the DIGITAL board cannot exchange with single.
When this part on the DIGITAL board is damaged, exchange the
entire mounted board.
BOARD
IC3506 on the DIGITAL board cannot exchange with single.
When this part on the DIGITAL board is damaged, exchange the
entire mounted board.