DOWNLOAD Sony STR-DG820 Service Manual ↓ Size: 5.44 MB | Pages: 97 in PDF or view online for FREE

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STR-DG820
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97
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Service Manual
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Audio
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str-dg820.pdf
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Sony STR-DG820 Service Manual ▷ View online

SERVICE MANUAL
Sony Corporation
Audio&Video Business Group
Published by Sony Techno Create Corporation
STR-DG820
SPECIFICATIONS
MULTI CHANNEL AV RECEIVER
9-889-096-06
2010B05-1
© 
2010.02
US Model
Canadian Model
AEP Model
UK Model
E Model
Australian Model
Ver. 1.5  2010.02
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.
** Manufactured under license under U.S. Patent #’s: 5,451,942; 5,956,674; 5,974,380; 5,978,762; 6,226,616; 
     6,487,535 & other U.S. and worldwide patents issued & pending. DTS is a registered trademark and the 
     DTS logos, Symbol, DTS-HD and DTS-HD Master Audio are trademarks of DTS, Inc. © 1996-2007 DTS, 
     Inc. All Rights Reserved.
This receiver incorporates High-Definition Multimedia Interface (HDMITM) technology.HDMI, the HDMI 
logo and High-Definition Multimedia Interface are trademarks or registered trademarks of HDMI Licensing LLC.
XM Ready® is a registered trademark of XM Satellite Radio Inc. All rights reserved.
This product is manufactured under license from Neural Audio Corporation and THX Ltd. Sony Corporation 
hereby grants the user a non-exclusive, non-transferable, limited right of use to this product under USA and 
foreign patent, patent pending and other technology or trademarks owned by Neural Audio Corporation and THX 
Ltd. “Neural Surround”, “Neural Audio”, “Neural” and “NRL” are trademarks and logos owned by Neural Audio 
Corporation, THX is a trademark of THX Ltd., which may be registered in some jurisdictions. All rights reserved.
“x.v.Color” and “x.v.Color” logo are trademarks of Sony Corporation.
“BRAVIA” and                      are trademarks of Sony Corporation.
– Continued on next page –
AUDIO POWER 
SPECIFICATIONS (US model)
POWER OUTPUT AND TOTAL 
HARMONIC DISTORTION:
With 8 ohm loads, both channels driven, from 
20 Hz – 20,000 Hz; rated 100 watts per 
channel minimum RMS power, with no more 
than 0.09% total harmonic distortion from 250 
milliwatts to rated output.
Amplifier section
Models of area code U, CA
Power Output
1)
Minimum RMS Output Power 
(8 ohms, 20 Hz – 20 kHz, THD 0.09%)
 
100 W + 100 W
Stereo Mode Output Power 
(8 ohms, 1 kHz, THD 0.7%)
110 W + 110 W
Surround Mode Output Power
2) 
(8 ohms, 1 kHz, THD 10%)
150 W per channel
1)
Measured under the following conditions:
 
2)
Reference power output for front, center, surround 
and surround back speakers. Depending on the 
sound field settings and the source, there may be 
no sound output.
Frequency response
Analog
10 Hz – 70 kHz,
 
+0.5/–2 dB (with sound 
field and equalizer 
bypassed)
Input
Analog
Sensitivity: 500 mV/
 
50 kohms
 
S/N
3)
: 96 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)
Area code
Power requirements
U, CA                         120 V AC, 60 Hz
CEL, CEK, ECE
230 V AC, 50 Hz
Output (analog)
AUDIO OUT
Voltage: 500 mV/
 
10 kohms
SUBWOOFER
Voltage: 2 V/1 kohm
Equalizer
Gain levels
±10 dB, 1 dB step
3)
INPUT SHORT (with sound field 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
Intermediate frequency
10.7 MHz 
Models of area code CEL, CEK, ECE, AU, 
TW, E51
1)
Minimum RMS Output Power 
(8 ohms, 20 Hz – 20 kHz, THD 0.09%)
 
85 W + 85 W
Stereo Mode Output Power 
(8 ohms, 1 kHz, THD  0.7%)
100 W + 100 W
Surround Mode Output Power
2) 
(8 ohms, 1 kHz, THD 10%)
140 W per channel
Models of area code KR
1)
Minimum RMS Output Power
(8 ohms, 20 Hz – 20 kHz, THD 0.09%)
 
75 W + 75 W
Stereo Mode Output Power
(8 ohms, 1 kHz, THD 0.7%)
 
90 W + 90 W
Surround Mode Output Power
2)
(8 ohms, 1 kHz, THD 10%)
130 W per channel
AU, E51                        240 V AC, 50 Hz
TW                                110 V AC, 60 Hz
KR                                 220 V AC, 60 Hz
STR-DG820
2
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.
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)
Fig. A.  Using an AC voltmeter to check AC leakage.
1.5 k
Ω
0.15 
μF
AC
voltmeter
(0.75 V)
To Exposed Metal
Parts on Set
Earth Ground
About area codes
The area code of the receiver you purchased is 
shown on the lower right portion of the rear panel 
(see the illustration below).
Any differences in operation, according to the area 
code, are clearly indicated in the text, for example, 
“Models of area code AA only”.
SPEAKERS
SPEAKERS
CENTER
SURROUND BACK
FRONT A
FRONT B
L
R
SURROUND
L
R
L
L
R
R
Area code
AM tuner section
Tuning range
Antenna (aerial)
Loop antenna
Intermediate frequency
 
450 kHz
5)
You can change the AM tuning scale to 9 kHz or
10 kHz. After tuning in any AM station, turn off
the receiver. While holding down TUNING
MODE, press POWER on the receiver. All preset
stations will be erased when you change the tuning
scale. To reset the scale to 10 kHz (or 9 kHz),
repeat the procedure.
Video section
Inputs/Outputs
Video:
1 Vp-p, 75 ohms
COMPONENT VIDEO:
Y: 1 Vp-p, 75 ohms
P
B
/C
B
: 0.7 Vp-p, 75 ohms
P
R
/C
R
: 0.7 Vp-p, 75 ohms
80 MHz HD Pass Through
Area code
Tuning scale
10 kHz step
9 kHz step
CEL, CEK, ECE
531 kHz –
1,602 kHz
U, CA 
             530 kHz – 
1,710 kHz
5)
531 kHz –
1,710 kHz
5)
General
Power requirements
Power output (DIGITAL MEDIA PORT)
DC OUT:
5V, 0.7 A MAX
Power consumption
Power consumption (during standby mode)
0.7 W
 
(When “CTRL:HDMI” in
HDMI menu is set to
“CTRL OFF”)
Dimensions (width/height/depth) (Approx.)
17 × 6 1/4 × 12 5/8 inches
 
(430 × 157.5 × 318 mm)
including projecting parts
and controls
Mass (Approx.)
18 lb 12 oz (8.5 kg) (U, CA)
8.4 kg (CEL, CEK, 
ECE, AU, TW, KR, E51)
Supplied accessories
Operating instructions
Quick Setup Guide (1)
FM wire antenna (aerial) (1)
AM loop antenna (aerial) (1)
Remote commander (RM-AAP021) (1)
R6 (size-AA) batteries (2)
Optimizer microphone (ECM-AC2) (1)
Design and specifications are subject to
change without notice.
Area code
Power consumption
U                           250 W
CA                        320 VA
Area code
Power requirements
U, CA                           120 V AC, 60 Hz
CEL, CEK, ECE
 230 V AC, 50/60 Hz
AU, E51
530 kHz –
1,710 kHz
5)
531 kHz –
1,710 kHz
5)
KR, TW
530 kHz –
1,610 kHz
5)
531 kHz –
1,602 kHz
5)
AU
240 V AC, 50 Hz
TW
110 V AC, 60 Hz
KR
220 - 230 V AC, 50/60 Hz
E51
120/220/240 V AC, 50/60 Hz
CEL, CEK, ECE,
 
AU, KR, E51
230 W
TW
220 W
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.
Ver. 1.1
STR-DG820
3
1. 
SERVICING  NOTES
  .............................................   3
2. GENERAL
  ..................................................................   5
3. DISASSEMBLY
3-1.   Disassembly Flow  ..........................................................   9
3-2.   Case .................................................................................   9
3-3.   Front Panel Block ...........................................................   10
3-4.   Back Panel Block  ...........................................................   10
3-5.   Main Block .....................................................................   11
3-6.   MAIN Board ...................................................................   11
4. 
TEST  MODE 
 ............................................................   12
5. 
ELECTRICAL  CHECK 
 .........................................   13
6. DIAGRAMS
6-1.  Block Diagram - MAIN Section - ...................................   14
6-2.  Block Diagram - HDMI Section - ...................................   15
6-3.  Block Diagram - DSP/XM Section - ..............................   16
6-4.  Block Diagram - AUDIO Section - .................................   17
6-5.  Block Diagram - POWER SUPPLY Section - ................   18
6-6.  Printed Wiring Board - MAIN Board - ...........................   20
6-7.  Schematic Diagram - MAIN Board (1/3) - .....................   21
6-8.  Schematic Diagram - MAIN Board (2/3) - .....................   22
6-9.  Schematic Diagram - MAIN Board (3/3) - .....................   23
6-10. Printed Wiring Board 
 
- HDMI Board (Component Side) - ................................   24
6-11. Printed Wiring Board 
 
- HDMI Board (Conductor Side) - ..................................   25
6-12.  Schematic Diagram - HDMI Board (1/2) - .....................   26
6-13.  Schematic Diagram - HDMI Board (2/2) - .....................   27
6-14. Printed Wiring Board 
 
- XM Board (US, Canadian models) - ............................   28
6-15. Schematic Diagram 
 
- XM Board (US, Canadian models) - ............................   29
6-16.  Printed Wiring Board - DSP Board - ..............................   30
6-17.  Schematic Diagram - DSP Board - .................................   31
6-18. Printed Wiring Boards 
 
- DIGITAL AUDIO Section (1/2) - .................................   32
6-19. Printed Wiring Board 
 
- DIGITAL AUDIO Section (2/2) - .................................   33
6-20. Schematic Diagram 
 
- DIGITAL AUDIO Section (1/2) - .................................   34
6-21. Schematic Diagram 
 
- DIGITAL AUDIO Section (2/2) - .................................   35
6-22.  Printed Wiring Board - MICOM Board - ........................   36
6-23.  Schematic Diagram - MICOM Board - ..........................   37
6-24.  Printed Wiring Board - DISPLAY Board - .....................   38
6-25.  Schematic Diagram - DISPLAY Board - ........................   39
6-26.  Printed Wiring Board - VIDEO Board - .........................   40
6-27.  Schematic Diagram - VIDEO Board - ............................   41
6-28.  Printed Wiring Boards - PANEL Section - .....................   42
6-29.  Schematic Diagram - PANEL Section - ..........................   43
6-30.  Printed Wiring Board - SPEAKER Board - ....................   44
6-31.  Schematic Diagram - SPEAKER Board - .......................   44
6-32.  Printed Wiring Board - DCDC Board - ..........................   45
6-33.  Schematic Diagram - DCDC Board - .............................   45
6-34.  Printed Wiring Boards - POWER Section - ....................   46
6-35.  Schematic Diagram - POWER Section - ........................   47
7. 
EXPLODED  VIEWS
7-1. Case 
Section 
....................................................................  70
7-2.  Front Panel Section .........................................................   71
7-3.  Back Panel Section .........................................................   72
7-4. Chassis 
Section 
...............................................................  73
8. 
ELECTRICAL  PARTS  LIST
  ..............................   74
TABLE  OF  CONTENTS
SECTION  1
SERVICING  NOTES
UNLEADED  SOLDER
Boards requiring use of unleaded solder are printed with the lead-
free mark (LF) indicating the solder contains no lead.
(Caution: Some printed circuit boards may not come printed with 
the lead free mark due to their particular size)
 : LEAD  FREE  MARK
Unleaded solder has the following characteristics.
•   Unleaded solder melts at a temperature about 40 °C higher 
than ordinary solder.
 
Ordinary soldering irons can be used but the iron tip has to be 
applied to the solder joint for a slightly longer time.
 
Soldering irons using a temperature regulator should be set to 
about 350 °C.
Caution:  The printed pattern (copper foil) may peel away if the 
heated tip is applied for too long, so be careful!
•   Strong viscosity
 
Unleaded solder is more viscou-s (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.
NOTE  OF  REPLACING  THE  IC3506  AND  IC3508  ON  
THE  HDMI  BOARD
IC3506 and IC3508 on the HDMI board cannot exchange with sin-
gle. When IC3506 and IC3508 on the HDMI board are damaged, 
exchange the entire mounted board.
NOTE  OF  REPLACING  THE  IC5021  ON  THE  DSP  
BOARD
IC5021 on the DSP board cannot exchange with single. When 
IC5021 on the DSP board is damaged, exchange the entire mount-
ed board.
NOTE  OF  REPLACING  THE  IC7005  ON  THE  MICOM 
BOARD
IC7005 on the MICOM board cannot exchange with single. When 
IC7005 on the MICOM board is damaged, exchange the entire 
mounted board.
Ver. 1.1
Note: Refer to supplement-1 for the HDMI and DSP boards of print-
ed wiring boards, schematic diagram and electrical parts list 
of Chilean, Peruvian, Korean, Taiwan and Australian models.
STR-DG820
4
CONNECTOR  AND  SPEAKER  BOARDS  DISCRIMINA-
TION
In this set, the CONNECTOR and SPEAKER baords have been 
changed in the midway of production. Repair after distinguishing 
each type set to doing the repair referring to the following.
– CONNECTOR Board (Suffix-11/-12)
(Component Side) –
– CONNECTOR Board (Suffix-13)
(Component Side) –
Note: In 
suffi x-11/-12 and suffi x-13 of CONNECTOR board, the shape 
of the board is quite different. It is possible to distinguish in the 
form of the board.
– SPEAKER Board (Component Side) –
1
7
1
5
CNP285
CNP286
Former :   1-875-925-11 or 
  
1-875-925-12
New : 
 
1-875-925-13
Error messages
If there is a malfunction, the display shows a 
message. You can check the condition of the 
system by the message. See the following table 
to solve the problem. 
PROTECTOR
• Irregular current is output from the 
speakers. The receiver will automatically
turn off after a few seconds. Check the 
speaker connection and turn on the power 
again.
For other messages, see “Message list after 
Auto Calibration measurement” (Refer to 
Operating Instructions) and “XM Radio 
messages list” (Refer to Operating Instructions).
If you are unable to remedy the
problem
Clearing the receiver’s memory may remedy 
the problem. Refer to this page “Reference 
sections for clearing the receiver’s memory”. 
However, note that all memorized settings will 
be reset to their factory settings and you will 
have to readjust all settings on the receiver.
Reference sections for clearing 
the receiver’s memory
Before using the receiver for the first time,
initialize the receiver by performing the
following procedure. This procedure can also 
be used to return settings you have made to
their factory defaults. 
Be sure to use the buttons on the receiver for 
this operation.
1
Press POWER to turn off the 
receiver.
2
Hold down TONE MODE and 
2CH/A.DIRECT and then press 
POWER to turn on the receiver.
3
Release the TONE MODE and 
2CH/A.DIRECT after a few 
seconds.
After “CLEARING” appears on the 
display for a while, “CLEARED” 
appears.
All the settings you have changed or
adjusted are reset to the initial settings.
Performing initial setup 
operations
SPEAKERS
(OFF/A/B/A+B)
PHONES
VIDEO 2 IN/PORTABLE AV IN
VIDEO
L  AUDIO R
AUTO CAL MIC
MEMORY/
ENTER
2CH/
A.DIRECT
A.F.D.
MOVIE
MUSIC
DIMMER
INPUT SELECTOR
TONE MODE
ON/STANDBY
TUNING MODE
POWER
TUNING
DISPLAY
INPUT MODE
MASTER VOLUME
TONE
1,2
2,3
2,3
Be sure to use the buttons on the receiver for 
this operation.
1
Press 
 / to turn off the 
receiver.
2
While holding down MUSIC,
press
 /.
“S.F. CLEAR” appears on the display and 
all sound fields are reset to their initial 
setting.
SPEAKERS
(OFF/A/B/A+B)
PHONES
VIDEO 2 IN/PORTABLE AV IN
VIDEO
L  AUDIO R
AUTO CAL MIC
MEMORY/
ENTER
2CH/
A.DIRECT
A.F.D.
MOVIE
MUSIC
DIMMER
INPUT SELECTOR
TONE MODE
ON/STANDBY
TUNING MODE
POWER
TUNING
DISPLAY
INPUT MODE
MASTER VOLUME
TONE
1,2
2
Ver. 1.2
Page of 97
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Sony STR-DG820 Service Manual ▷ Download

  • DOWNLOAD Sony STR-DG820 Service Manual ↓ Size: 5.44 MB | Pages: 97 in PDF or view online for FREE
  • Here you can View online or download the Service Manual for the Sony STR-DG820 in PDF for free, which will help you to disassemble, recover, fix and repair Sony STR-DG820 Audio. Information contained in Sony STR-DG820 Service Manual (repair manual) includes:
  • Disassembly, troubleshooting, maintenance, adjustment, installation and setup instructions.
  • Schematics, Circuit, Wiring and Block diagrams.
  • Printed wiring boards (PWB) and printed circuit boards (PCB).
  • Exploded View and Parts List.