STR-DG520 - Sony Audio Service Manual (repair manual)

str-dg520 service manual
Model
STR-DG520
Pages
68
Size
3.2 MB
Type
PDF
Document
Service Manual
Brand
Device
Audio
File
str-dg520.pdf
Date

Read Sony STR-DG520 Service Manual online

SERVICE MANUAL
Published by Sony Techno Create Corporation
Sony Corporation
Audio Business Group
SPECIFICATIONS
MULTI CHANNEL AV RECEIVER
9-887-995-02
2008E04-1
© 
2008.05
US Model
Canadian Model
AEP Model
UK Model
Australian Model
Taiwan Model
Ver. 1.1  2008.05
STR-DG520
AUDIO POWER SPECIFICATIONS
POWER OUTPUT AND TOTAL HARMONIC DISTORTION:
(Models of area code US only)
With 8 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
Models of area code US, CND
 1)
Minimum RMS Output Power (8 ohms, 20 Hz – 20 kHz, THD 0.09%)
   
90 W + 90 W
Stereo Mode Output Power (8 ohms, 1 kHz, THD 1%)
   
100 W + 100 W
Surround Mode Output Power 
2)
 (8 ohms, 1 kHz, THD 10%)
  
130 
W/ch
Models of area code AEP, UK, AUS, ECE 
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 1%)
   
100 W + 100 W
Surround Mode Output Power 
2)
 (8 ohms, 1 kHz, THD 10%)
  
130 
W/ch
Models of area code TW
 1)
Minimum RMS Output Power (8 ohms, 20 Hz – 20 kHz, THD 0.09%)
   
70 W + 70 W
Stereo Mode Output Power (8 ohms, 1 kHz, THD 1%)
   
100 W + 100 W
Surround Mode Output Power 
2)
 (8 ohms, 1 kHz, THD 10%)
  
130 
W/ch
– Continued on next page –
Manufactured under license from Dolby Laboratories.
Dolby, Pro Logic, 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;6,487,535 
& other U.S. and worldwide patents issued & pending. 
DTS and DTS Digital Surround are registered trademarks and 
the DTS logos and Symbol are trademarks of DTS, Inc.
© 1996-2007 DTS, Inc. All Rights Reserved.
This receiver incorporates High-Defi nition Multimedia Interface 
(HDMI
TM
) technology.
HDMI, the HDMI logo and High-Defi nition Multimedia Interface 
are trademarks or registered trademarks of HDMI Licensing LLC. 
Photo: Black type
STR-DG520
2
1) Measured under the following conditions:
Area code 
Power requirements
US, CND  
120 V AC, 60 Hz
AEP, UK, ECE 
230 V AC, 50 Hz
AUS  
240 V AC, 50 Hz
TW 
110 V AC, 60 Hz
2) Reference power output for front, center and surround speakers. 
  Depending on the sound fi eld settings and the source, there may be 
  no sound output.
Frequency response
  Analog 
10 Hz – 70 kHz
   
+0.5/–2 dB (with sound
   
fi eld and tone bypassed)
Inputs
  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)
Output (Analog)
  AUDIO OUT 
Voltage: 500 mV/10 kohms
  SUB WOOFER 
Voltage: 2 V/1 kohm
Tone
  Gain levels 
±6 dB, 1 dB step
3) INPUT SHORT (with sound fi eld and tone bypassed).
4) Weighted network, input level.
FM tuner section
Tuning range 
87.5 – 108.0 MHz
Antenna FM 
wire 
antenna
Antenna terminals 
75 ohms, unbalanced
Intermediate frequency 
10.7 MHz
AM tuner section
Tuning range
  Models of area code US, CND
  With 10-kHz tuning scale: 
530 – 1,710 kHz 
5)
  With 9-kHz tuning scale: 
531 – 1,710 kHz 
5)
  Models of area code AEP, UK, AUS, ECE, TW
  With 9-kHz tuning scale: 
531 – 1,602 kHz
Antenna 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 
?/1. 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: 
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
General
Power requirements
Area code 
Power requirements
US, CND 
120 V AC, 60 Hz
AEP, UK, ECE 
230 V AC, 50/60 Hz
AUS  
240 V AC, 50 Hz
TW 
110 V AC, 60 Hz
Power output (DIGTAL MEDIA PORT)
  DC OUT : 
5 V, 0.7 A MAX
Power consumption
Area code 
Power consumption
US, AEP, UK, AUS, ECE 
220 W
CND 300 
VA
TW 500 
W
Power consumption (during standby mode)
  
0.3 
W
Dimensions (w/h/d) (Approx.)
   
430 × 157.5 × 318 mm
  
(16 
7/8
 × 6 
2/8
 × 12 
5/8 
inches) including
   
projecting parts and controls
Mass (Approx.) 
7.7 kg (16 lb 16 oz)
Supplied accessories
  Operating Instruction (1)
  Quick Setup Guide (1)
  FM wire antenna (aerial) (1)
  AM loop antenna (aerial) (1)
  Remote commander RM-AAU020 (1)
  R6 (size-AA) batteries (2)
  Optimizer microphone ECM-AC2 (1) (AEP, UK, AUS, ECE, TW)
Design and specifi cations are subject to change without notice.
• Abbreviation
 AUS  : 
Australian 
model
 CND  : 
Canadian 
model
 ECE  : 
Continental 
European,
   
  East European and
   
  Russian models
 TW  : 
Taiwan 
model
Ver. 1.1
STR-DG520
3
Model
Part No.
US
3-279-308-0
[]
CND
3-279-308-1
[]
AEP, UK
3-279-308-2
[]
AUS
3-279-308-3
[]
ECE
3-279-308-4
[]
TW
3-279-308-5
[]
SAFETY  CHECK-OUT (US MODEL)
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.
SAFETY-RELATED COMPONET 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  COM-  POSANTS  QUE  
PAR  DES  PIÈCES  SONY  DONT  LES  NUMÉROS  SONT  DON-
NÉS  DANS  CE  MANUEL  OU  DANS  LES  SUPPLÉMENTS  
PUBLIÉS  PAR  SONY.
1.5 k
Ω
0.15
μF
AC
voltmeter
(0.75 V) 
To Exposed Metal 
Parts on Set 
Earth Ground
Part No.
MODEL IDENTIFICATION
–BACK PANEL–
• Abbreviation
 AUS : 
Australian 
model
 CND : 
Canadian 
model
  ECE  : Continental European,
   
  East European and
   
  Russian models
 TW  : 
Taiwan 
model
UNLEADED  SOLDER
Boards requiring use of unleaded solder are printed with the lead-
free mark (LF) indicating the solder contains no lead.
(Caution: Some printed circuit boards may not come printed with 
the lead free mark due to their particular size)
 : 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.
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.
Ver. 1.1
STR-DG520
4
1. GENERAL
 
Description and location of parts ........................................ 5
2. DISASSEMBLY
2-1. Case 
..................................................................................... 8
2-2.  Back Panel Section ............................................................. 9
2-3.  Front Panel Section ............................................................. 9
2-4. DIGITAL 
Board 
................................................................ 10
2-5.  MAIN Board Section ........................................................ 10
2-6.  STANDBY Board ............................................................. 11
3. TEST MODE 
 .................................................................... 12
4. FM TUNER CHECK 
 ...................................................... 13
5. DIAGRAMS
5-1.   Block Diagram – Tuner/Audio Section – .......................... 15
5-2.   Block Diagram – Digital Section – .................................... 16
5-3.   Block Diagram – Video Section – ..................................... 17
5-4.   Block Diagram – HDMI SW Section – ............................. 18
5-5.   Block Diagram – Key/Display Section – .......................... 19
5-6.   Block Diagram – Power Section – .................................... 20
5-7.   Printed Wiring Boards – Main Section – ........................... 22
5-8.   Schematic Diagram – Main Section (1/3) – ...................... 23
5-9.   Schematic Diagram – Main Section (2/3) – ...................... 24
5-10. Schematic Diagram – Main Section (3/3) – ...................... 25
5-11. Printed Wiring Board – Digital Section (1/2) – ................. 26
5-12. Printed Wiring Board – Digital Section (2/2) – ................. 27
5-13. Schematic Diagram – Digital Section (1/3) – .................... 28
5-14. Schematic Diagram – Digital Section (2/3) – .................... 29
5-15. Schematic Diagram – Digital Section (3/3) – .................... 30
5-16. Printed Wiring Board – Video Section – ........................... 31
5-17. Schematic Diagram – Video Section – .............................. 32
5-18. Printed Wiring Board – HDMI SW Section – ................... 33
5-19. Schematic Diagram – HDMI SW Section – ...................... 34
5-20. Printed Wiring Boards – DCAC, Power Section – ............ 35
5-21. Schematic Diagram – DCAC, Power Section – ................ 35
5-22. Printed Wiring Board – Display Section – ........................ 36
5-23. Schematic Diagram – Display Section – ........................... 37
5-24. Printed Wiring Boards – Power Section – ......................... 38
5-25. Schematic Diagram – Power Section – ............................. 39
6. EXPLODED VIEWS
6-1.   Case Section ...................................................................... 50
6-2.   Front Panel Section ............................................................ 51
6-3.   Back Panel Section ............................................................ 52
6-4.   Chassis Section .................................................................. 53
7. ELECTRICAL PARTS LIST 
 ....................................... 54
TABLE  OF  CONTENTS
Page of 68
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Download Sony STR-DG520 Service Manual (Repair Manual)

Here you can read online and download Sony STR-DG520 Service Manual in PDF. STR-DG520 service manual will guide through the process and help you recover, restore, fix, disassemble and repair Sony STR-DG520 Audio. Information contained in service manuals typically includes schematics / circuit diagrams, wiring diagrams, block diagrams, printed wiring boards, exploded views, parts list, disassembly / assembly, pcb.