Sony STR-DG720 User manual

SERVICE MANUAL
Published by Sony Techno Create Corporation
Sony Corporation
Audio Business Group
SPECIFICATIONS
MULTI CHANNELAV RECEIVER
9-887-994-01
2008B04-1
© 2008.02
US Model
Canadian Model
AEP Model
UK Model
Ver. 1.0 2008.02
STR-DG720
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 95
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 US, CND 1)
Minimum RMS Output Power (8 ohms, 20 Hz – 20 kHz, THD 0.09%)
95 W + 95 W
Stereo Mode Output Power (8 ohms, 1 kHz, THD 1%)
105 W + 105 W
Surround Mode Output Power 2) (8 ohms, 1 kHz, THD 10%)
140 W/ch
Models of area code AEP, UK 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%)
140 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; 6,226,616; 6,487,535;
7,003,467; 7,212,872 & other U.S. and worldwide patents issued &
pending. DTS, DTS Digital Surround, ES, and Neo:6 are registered
trademarks and the DTS logos, Symbol and DTS 96/24 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.
The XM name and related logo are registered
trademarks of XM Satellite Radio Inc. All rights reserved.
“x.v.Color” and “x.v.Color” logo are trademarks of
Sony Corporation.
“BRAVIA” and BRAVIA are trademarks of Sony Corporation.
Photo: Black type
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STR-DG720
2
1) Measured under the following conditions:
Area code Power requirements
US, CND 120 VAC, 60 Hz
AEP, UK 230 VAC, 50 Hz
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)
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 field and equalizer 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
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: 1 Vp-p/75 ohms
COMPONENT VIDEO: Y: 1 Vp-p/75 ohms
P
B/CB: 0.7 Vp-p/
75 ohms
P
R/CR: 0.7 Vp-p/
75 ohms
80 MHz HD Pass Through
General
Power requirements
Area code Power requirements
US, CND 120 VAC, 60 Hz
AEP, UK 230 VAC, 50/60 Hz
Power output (DIGTAL MEDIAPORT)
DC OUT : 5 V, 0.7 A MAX
Power consumption
Area code Power consumption
US 250 W
CND 340 VA
AEP, UK 220 W
Power consumption (during standby mode)
0.3 W (when “CONTROL FOR HDMI”
in VIDEO menu is set to “CTRL OFF”)
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.) 8.2 kg (18 lb 2 oz) (US, CND)
8.1 kg (AEP, UK)
Supplied accessories
Operating Instruction (1)
Quick Setup Guide (1)
FM wire antenna (aerial) (1)
AM loop antenna (aerial) (1)
Remote commander RM-AAU021 (1) (US, CND)
Remote commander RM-AAU023 (1) (AEP, UK)
R6 (size-AA) batteries (2)
Optimizer microphone ECM-AC2 (1)
Design and specifications are subject to change without notice.
• Abbreviation
CND : Canadian model
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TEL [phone] QQ 376315150 892498299 TEL [phone] QQ 376315150 892498299
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STR-DG720
3
Part No.
Model Part No.
US 3-093-898-0[]
CND 3-093-898-1[]
AEP, UK 3-093-898-2[]
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. Acommercial 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-operatedAC 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 VAC range are suitable. (See
Fig. A)
Fig. A. Using an AC voltmeter to check AC leakage.
SAFETY-RELATED COMPONET 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.
ATTENTION AU COMPOSANT AYANT RAPPORT
À LA SÉCURITÉ!
LES COMPOSANTS IDENTIFIÉS PAR UNE MARQUE 0SUR
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 kΩ0.15 μFAC
voltmeter
(0.75 V)
To Exposed Metal
Parts on Set
Earth Ground
MODEL IDENTIFICATION
–BACK PANEL–
• Abbreviation
CND : Canadian 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 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.
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.
Special Component Notice
The components identified by mark 9contain confidential infor-
mation.
Strictly follow the instructions whenever the components are re-
paired and/or replaced.
Notice pour composants spéciaux
Les composants identifiés par la marque 9contiennent des infor-
mations confidentielles.
Suivre scrupuleusement les instructions chaque fois qu’un com-
posant est remplacé et / ou réparé.
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STR-DG720
4
1. GENERAL
Description and location of parts (US, Canadian model)... 5
Description and location of parts (AEP, UK model) .......... 7
2. DISASSEMBLY
2-1. Case................................................................................... 10
2-2. Back Panel Section ........................................................... 11
2-3. Front Panel Section........................................................... 11
2-4. DIGITAL Board................................................................ 12
2-5. MAIN Board Section........................................................ 12
2-6. STANDBY Board ............................................................. 13
3. TEST MODE .................................................................... 14
4. FM TUNER CHECK ...................................................... 15
5. DIAGRAMS
5-1. Block Diagram – Tuner/Audio Section – ......................... 17
5-2. Block Diagram – Digital Section –...................................18
5-3. Block Diagram – Video Section – .................................... 19
5-4. Block Diagram – HDMI RE Section –............................. 20
5-5. Block Diagram – XM Section (US, Canadian model) –... 21
5-6. Block Diagram – Key/Display Section –.......................... 22
5-7. Block Diagram – Power Section –.................................... 23
5-8. Printed Wiring Boards – Main Section –.......................... 25
5-9. Schematic Diagram – Main Section (1/3) –...................... 26
5-10. Schematic Diagram – Main Section (2/3) –...................... 27
5-11. Schematic Diagram – Main Section (3/3) –...................... 28
5-12. Printed Wiring Board – Digital Section (1/2) –................ 29
5-13. Printed Wiring Board – Digital Section (2/2) –................ 30
5-14. Schematic Diagram – Digital Section (1/3) –................... 31
5-15. Schematic Diagram – Digital Section (2/3) –................... 32
5-16. Schematic Diagram – Digital Section (3/3) –................... 33
5-17. Printed Wiring Boards – Video Section –......................... 34
5-18. Schematic Diagram – Video Section – ............................. 35
5-19. Printed Wiring Board – HDMI RE Section (1/2) – .......... 36
5-20. Printed Wiring Board – HDMI RE Section (2/2) – .......... 37
5-21. Schematic Diagram – HDMI RE Section (1/2) –............. 38
5-22. Schematic Diagram – HDMI RE Section (2/2) –............. 39
5-23. Printed Wiring Board
– XM Section (US, Canadian model) –............................ 40
5-24. Schematic Diagram
– XM Section (US, Canadian model) –............................ 41
5-25. Printed Wiring Boards – DCAC, Power Section –........... 42
5-26. Schematic Diagram – DCAC, Power Section – ............... 42
5-27. Printed Wiring Board – Display Section –........................ 43
5-28. Schematic Diagram – Display Section – .......................... 44
5-29. Printed Wiring Boards – Power Section –........................ 45
5-30. Schematic Diagram – Power Section –............................. 46
5-31. Schematic Diagram – DC-DC Converter Section – ......... 47
6. EXPLODED VIEWS
6-1. Case Section...................................................................... 70
6-2. Front Panel Section........................................................... 71
6-3. Back Panel Section ........................................................... 72
6-4. Chassis Section ................................................................. 73
7. ELECTRICAL PARTS LIST ....................................... 74
TABLE OF CONTENTS
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TEL [phone] QQ 376315150 892498299 TEL [phone] QQ 376315150 892498299
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STR-DG720
5
SECTION 1
GENERAL This section is extracted
from instruction manual.
• US, Canadian model
5US
Getting Started
Description and location of parts
Getting Started
Front panel
?/1
AUTO CAL MIC
SPEAKERS
(OFF/A/B)
PHONES VIDEO 2 IN/PORTABLE AV IN
VIDEO L AUDIO R
MEMORY/
ENTER CATEGORY MODE CATEGORY
TUNING
2CH A.F.D. MOVIE MUSIC ANALOG
DIRECT MUTING
DISPLAY INPUT MODE
INPUT SELECTOR
MASTER VOLUME
TUNING MODE
9
q;
qa
qdqf qs
8
13 76542
qgqhqj
Name Function
A?/1
(on/standby) Press to turn the receiver on or off (page 27, 35, 36, 56,
90).
BSPEAKERS
(OFF/A/B) Press to select the front speaker system (page 28).
CTUNING
MODE Press or turn to operate the tuner (FM/AM/XM) (page
57, 63).
TUNING +/–
DDisplay The current status of the
selected component or a list
of selectable items appears
here (page 7).
ERemote
sensor Receivessignals fromremote commander.
FDISPLAY Press to select information
displayed on the display
(page 79).
Name Function
GINPUT MODE Press to select the input mode
when the same components
are connected to both digital
and analog jacks (page 75).
HMASTER
VOLUME Turn to adjust the volume level of all speakers at the
same time (page 33, 34, 35,
36).
IMUTING Press to turn off the sound
temporarily.
Press MUTING again to
restore the sound (page 34).
JANALOG
DIRECT Press to listen to high quality analog sound (page 56).
KINPUT
SELECTOR Turn to select the input source to play back (page 34,
35, 36, 56, 57, 59, 60, 75, 78,
80).
continued
6US
Name Function
L2CH Press to select a sound field
(page 51).
A.F.D.
MOVIE
MUSIC
MCATEGORY
MODE Used when listening to XM Radio (page 61).
CATEGORY
+/–
NMEMORY/
ENTER Press to store a station or enter the selection when
selecting the settings (page
27, 59, 67).
OVIDEO 2 IN/
PORTABLEAV
IN jacks
Connects to a portable audio/
video component such as a
camcorder or video game
(page 24, 34).
PAUTO CAL
MIC jack Connects to the supplied optimizer microphone forthe
Auto Calibration function
(page 29).
QPHONES jack Connects to headphones
(page 85).
7US
Getting Started
About the indicators on the display
SW
LFE
SP A
SP B
LC
SL S
;
D EX
;
PLIIx
;
TACTPOLP DTS-ES 96/24 MEMORY ST
MONOD.RANGECOAXHDMI NEO:6
SB
SBL
R
SR
SBR
1 2 3 4 5 6 7 q;9
qaqsqh qfqg qd
8
Name Function
ASW Lights up when sub woofer
selection is set to “YES” (page
47) and the audio signal is
output from the SUB
WOOFER jack.
BLFE Lights up when the disc being
played back contains an LFE
(Low Frequency Effect)
channel and the LFE channel
signal is actually being
reproduced.
CSP A/SP B Lights up according to the
speaker system used.However,
these indicators do not light up
if the speaker output is turned
off or if headphones are
connected.
D;D/
;D EX “;D” lights up when the receiver is decoding Dolby
Digital signals.
“;D EX” lights up when the
receiver is decoding Dolby
Digital Surround EX signals.
Note
When playing a Dolby Digital
format disc, be sure that you
have made digital connections
and that INPUT MODE is set
to “AUTO” (page 75).
Name Function
E; PL/
; PLII/
; PLIIx
“; PL” lights up when the
receiver applies Pro Logic
processing to 2 channel signals
inordertooutputthecenterand
surround channel signals.
“; PLII” lights up when the
Pro Logic II Movie/Music/
Game decoder is activated.
“; PLIIx” lights up when the
Pro Logic IIx Movie/Music/
Game decoder is activated.
However, these indicators do
not light up if both the center
andsurround speakersareset to
“NO” (page 40) and you select
a sound field using the A.F.D.
button.
Note
Dolby Pro Logic IIx decoding
does not function for DTS
format signals or for signals
with a sampling frequency of
more than 48 kHz.
FOPT Lights up when INPUT MODE
is set to “AUTO” and the
source signal is a digital signal
being input through the
OPTICAL jack (page 75).
continued
8US
Name Function
GDTS/
DTS-ES/
DTS 96/24
“DTS” lights up when the
receiver is decoding DTS
signals.
“DTS-ES” lights up when the
receiver is decoding DTS-ES
signals.
“DTS 96/24” lights up when
the receiver is decoding DTS
96/24 (96 kHz/24 bit) signals.
Note
When playing a DTS format
disc, be sure that you have
made digital connections and
that INPUT MODE is set to
“AUTO” (page 75).
HCAT Lights up when category mode
is set to “ONE CAT” during
XM Radio operation (page 65).
IMEMORY Lights up when a memory
function, such as Preset
Memory (page 59), etc., is
activated.
JTuner
indicators Lights up when using the receiver to tune in radio
stations (page 57), etc.
KPreset
station
indicators
Lights up when using the
receiver to tune in radio
stations you have preset. For
details on presetting radio
stations, see page 58.
LD.RANGE Lights up when dynamic range
compression is activated (page
38).
MNEO:6 Lights up when DTS Neo:6
Cinema/Music decoder is
activated (page 52).
NCOAX Lights up when INPUT MODE
is set to “AUTO” and the
source signal is a digital signal
being input through the
COAXIAL jack (page 75).
OHDMI Lights up when the receiver
recognizes a component
connected via an HDMI IN
jack (page 20).
Name Function
PPlayback
channel
indicators
L
R
C
SL
SR
S
SBL
SBR
SB
The letters (L, C, R, etc.)
indicate the channels being
played back. The boxes around
the letters vary to show how the
receiver downmixes the source
sound (based on the speaker
settings).
Front Left
Front Right
Center (monaural)
Surround Left
Surround Right
Surround (monaural or the
surround components obtained
by Pro Logic processing)
Surround Back Left
Surround Back Right
Surround Back (the surround
back components obtained by
6.1 channel decoding)
Example:
Recording format (Front/
Surround): 3/2.1
Output channel: When
surround speakers are set to
“NO” (page 40)
Sound Field: A.F.D. AUTO
SW
LCR
SL SR
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STR-DG720
6
9US
Getting Started
Rear panel
321 1
65457
AM
HDMI
XM
SAT IN DVD IN BDIN OUT
SA-CD
/
CD
/
CD-R
OUT IN IN
L
R
Y
P
B
/
C
B
P R /
C
R
DIGITAL
(ASSIGNABLE)
DMPORT
OPTICAL
OPTICAL
SAT
IN
DVD
IN
COAXIAL
ANTENNA
IN
TV
TV SUBWOOFER
AUDIO
IN
VIDEO
IN
SAT
MONITOR
COMPONENT VIDEO
AUDIO
IN
VIDEO
IN
AUDIO
IN
VIDEO
IN
DVD
AUDIO
OUT AUDIO OUT
VIDEO
OUT VIDEO OUT
SAT IN DVD IN VIDEO 1 IN MONITOR OUT
VIDEO 1
SURROUND BACK SURROUND CENTER FRONT B
FRONT A
LLRLRR
SPEAKERS
L
R
DC5V
0.7A MAX
ADIGITAL INPUT/OUTPUT section
OPTICAL
IN jacks Connects to a DVD player, etc.
The COAXIAL
jack provides a
better sound
quality (page 22,
23).
COAXIAL IN
jack
HDMI IN/
OUT* jacks Connects to a DVD player,
satellite tuner, or a
Blu-ray disc
player. The image
isoutput to aTVor
a projector while
the sound can be
output from a TV
or/and speakers
connected to this
receiver (page 20).
BANTENNA section
FM
ANTENNA
jack
Connects to the
supplied FM wire
antenna (aerial)
(page 26).
AM
ANTENNA
terminals
Connects to the
supplied AM loop
antenna (aerial)
(page 26).
XM
ANTENNA
jack
ConnectstotheXM
Mini-Tuner and
Home Dock (not
supplied) (page 62).
CCOMPONENT VIDEO INPUT/
OUTPUT section
Y,PB/CB,PR/CR
IN/OUT* jacks Connects to a DVD player, TV,
satellite tuner, etc.
You can enjoy
high quality image
(page 17–23).
Green
(Y)
Blue
(PB/CB)
Red
(PR/CR)
continued
11US
Getting Started
Name Function
ATV ?/1
(on/standby) Press TV ?/1and TV (M) at the same time to turn the TV
on or off.
AV ?/1
(on/standby) Press to turn on or off the Sonyaudio/videocomponents
that the remote is assigned to
operate (page 81).
If you press ?/1(B) at the
same time, it will turn off the
receiver and other Sony
components (SYSTEM
STANDBY).
Note
The function of the AV ?/1
switch changes automatically
each time you press the input
buttons (C).
B?/1
(on/standby) Press to turn the receiver on or off.
To turn off all Sony
components, press ?/1and
AV ?/1(A) at the same time
(SYSTEM STANDBY).
CInput buttons Press one of the buttons to
select the component you
want to use. When you press
any of the input buttons, the
receiver turns on. The buttons
are factory assigned to control
Sony components.
You can change the button
assignments following the
steps in “Changing button
assignments” on page 81.
D2CH Press to select a sound field.
A.F.D.
MOVIE
MUSIC
ETHEATER Press to enjoy optimal image
suited for movies and to
output the sound from the
speakers connected to this
receiver automatically.
Note
This button will only function
if your TV is compatible with
Theater Mode.
Refer to the operating
instructions supplied with the
TV for details.
Name Function
FDVD/BD
MENU Press to display the menu of the DVD or Blu-ray disc on
the TV screen. Then, use V,v,
B,band (P) to perform
menu operations.
AUTO CAL Press to activate the Auto
Calibration function.
GD.TUNING Press to enter direct tuning
mode.
D.SKIP Press to skip a disc when
using a multi-disc changer.
HAMP MENU Press to display the menu of
the receiver. Then, use V,v,
B,band (P) to perform
menu operations.
IENTER Press to enter the value after
selecting a channel, disc or
track using the numeric
buttons of the TV, VCR or
satellite tuner.
MEMORY Press to store a station.
JMUTING Press to turn off the sound
temporarily.
Press MUTING again to
restore the sound.
Press MUTING and TV (M)
at the same time to activate
the TV’s muting function.
KTV VOL
+a)/– Press TV VOL +/– and TV
(M)atthesametimetoadjust
the volume level of the TV.
MASTER
VOL +a)/– Press to adjust the volume
level of all speakers at the
same time.
L./>b) Press to skip a track of the CD
player, DVD player or Blu-
ray disc player.
REPLAY /
ADVANCE Press to replay the previous scene or fast forward the
current scene of the VCR,
DVD player or Blu-ray disc
player.
m/Mb) Press to
– search tracks in the forward/
reverse direction of the
DVD player.
– start fast forward/rewind of
the VCR, CD player or Blu-
ray disc player.
<
<
continued
12US
Name Function
Ha)b) Press to start playback of the
VCR, CDplayer, DVDplayer,
or Blu-ray disc player.
Xb) Press to pause playback or
recording of the VCR, CD
player, DVD player or Blu-ray
disc player. (Also starts
recording with components in
recording standby.)
xb) Press to stop playback of the
VCR, CD player, DVD player
or Blu-ray disc player.
TV CH +/– Press TV CH +/– and TV (M)
at the same time to select
preset TV channels.
CATEGORY
+/– Press to select a category for XM Radio (page 65).
PRESET +/– Press to select
–presetstations.
– preset channels of the VCR
or satellite tuner.
TUNING +/– Press to scan a station.
CATEGORY
MODE Press to select the category mode for XM Radio (page 65).
FM MODE Press to select the FM
monaural or stereo reception.
MTV Press TV and the button with
orange printing at the same
time to enable TV operation.
NMENU/HOME Press to display the menu of
the VCR, DVD player,
satellite tuner or Blu-ray disc
player on the TV screen.
Press MENU/HOME and TV
(M) at the same time to
display the TV’s menu.
Then, use V,v,B,band
(P) to perform menu
operations.
Name Function
ORETURN/
EXIT OPress to
– return to the previous menu.
– exit the menu while the
menu or on-screen guide of
the VCR, DVD player,
satellite tuner or Blu-ray
disc player is displayed on
the TV screen.
Press RETURN/EXIT O
and TV (M) at the same time
to return to the previous menu
or exit the TV’s menu while
the menu is displayed on the
TV screen.
P
V/v/B/b
After pressing DVD/BD
MENU (F), AMP MENU
(H), or MENU/HOME (N),
press V,v,Bor bto select the
settings. Then, press to
enter the selection if you have
pressed DVD/BD MENU or
MENU/HOME previously.
Press also to enter the
selection of the receiver,
VCR, satellite tuner, CD
player, DVD player or Blu-
ray disc player.
QDISPLAY Press to select information
displayed on the TV screen of
the VCR, satellite tuner, CD
player, DVD player or Blu-
ray disc player.
Press DISPLAY and TV (M)
at the same time to display
TV’s information on the TV
screen.
RTOOLS/
OPTIONS Press to display and select the options of the DVD player or
Blu-ray disc player.
Press TOOLS/OPTIONS and
TV (M) at the same time to
display the options applicable
to the Sony TV.
10US
* You can watch the selected input image when you
connect the MONITOR OUT or HDMI OUT jack
to a TV or projector (page 17).
You can use the supplied RM-AAU021
Remote Commander to operate the receiver
and to control the Sony audio/video
components that the remote is assigned to
operate (page 81).
DSPEAKERS section
Connects to the
speakers (page 15).
EAUDIO INPUT/OUTPUT section
AUDIO IN/
OUT jacks Connects toaSuper Audio CD player,
CD recorder, etc.
(page 18).
AUDIO OUT
jack Connects to a sub
woofer (page 15).
FVIDEO/AUDIO INPUT/OUTPUT
section
AUDIO IN/
OUT jacks Connects toaVCR, DVD player, etc.
(page 17–24).
VIDEO IN/
OUT* jacks
GDMPORT
DMPORT
jack Connects to a DIGITALMEDIA
PORT adapter
(page 77).
White (L)
Red (R)
Black
White (L)
Red (R)
Yellow
Remote commander
123
46
78
0/10 ENTER
9
SYSTEM STANDBY
TV INPUT
SLEEP DMPORT
VIDEO1 VIDEO2 BD DVD
2CH A.F.D.
TV CH –
PRESET – TV CH + PRESET +
TUNING –
TV
TUNING +
FM MODE
MOVIE MUSIC
AMP MENU
CLEAR
DISPLAY MUTING
TV VOL
MASTER VOL
DVD/BD
MENU
AUTO CAL
D.TUNING
D.SKIP
THEATER
SAT TV SA-CD/CD TUNER
?/1
.
HMm
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REPLAY ADVANCE
– CATEGORY +
CATEGORY MODE
MEMORY
O
RETURN/EXIT
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AV
?/1
TOOLS/
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TEL [phone] QQ 376315150 892498299 TEL [phone] QQ 376315150 892498299
http://www.xiaoyu163.com
http://www.xiaoyu163.com

STR-DG720
7
• AEP, UK model
13US
Getting Started
a)The number 5, MASTER VOL +, TV VOL +, and
Hbuttons have tactile dots. Use the tactile dots
as references when operating the receiver.
b)This button isalso available for DIGITAL MEDIA
PORT adapter operation. For details on the
function of the button, refer to the operating
instructions supplied with the DIGITAL MEDIA
PORT adapter.
Notes
•Some functions explained in this section may not
work depending on the model.
•The above explanation is intended to serve as an
example only. Therefore, depending on the
component, the above operation may not be
possible or may operate differently than described.
Name Function
SzPress to input the decimal
point for channel numbers of
the Digital CATV terminal.
Press zand TV (M) at the
sametimetoinput thedecimal
point for the channel numbers
of the TV.
>10 Press to select track numbers
over 10 of the CD player.
CLEAR Press to clear a mistake when
you press the incorrect
numeric button.
TNumeric
buttons
(number 5a))
Press to
– preset/tune to preset
stations.
– select track numbers of the
CD player, DVD player or
Blu-ray disc player. Press
0/10 to select track number
10.
– select channel numbers of
the VCR or satellite tuner.
Press the numeric buttons and
TV (M) at the same time to
select the TV channels.
UTV INPUT Press TV INPUT and TV (M)
at the same time to select the
input signal (TV input or
video input).
SLEEP Press to activate the Sleep
Timer function and the
duration which the receiver
turns off automatically.
5GB
Getting Started
Description and location of parts
Getting Started
Front panel
?/1
AUTO CAL MIC
SPEAKERS
(OFF/A/B)
PHONES VIDEO 2 IN/PORTABLE AV IN
VIDEO L AUDIO R
MEMORY/
ENTER SUR BACK
DECODING
DIMMER SLEEP
TUNING
2CH A.F.D. MOVIE MUSIC ANALOG
DIRECT MUTING
DISPLAY INPUT MODE
INPUT SELECTOR
TUNING MODE
MASTER VOLUME
9
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qs
Name Function
A?/1
(on/standby) Press to turn the receiver on or off (page 27, 35, 36, 56).
BSPEAKERS
(OFF/A/B) Press to select the front speaker system (page 28).
CTUNING
MODE Press or turn to operate the tuner (FM/AM) (page 57).
TUNING +/–
DDisplay The current status of the
selected component or a list
of selectable items appears
here (page 7).
ERemote
sensor Receives signals from remote commander.
FDISPLAY Press to select information
displayed on the display
(page 72).
Name Function
GINPUT MODE Press to select the input mode
when the same components
are connected to both digital
and analog jacks (page 68).
HMASTER
VOLUME Turn to adjust the volume level of all speakers at the
same time (page 33, 34, 35,
36).
IMUTING Press to turn off the sound
temporarily.
Press MUTING again to
restore the sound (page 34).
JANALOG
DIRECT Press to listen to high quality analog sound (page 56).
KINPUT
SELECTOR Turn to select the input source to play back (page 34,
35, 36, 56, 57, 59, 60, 68, 71,
73).
continued
6GB
Name Function
L2CH Press to select a sound field
(page 51).
A.F.D.
MOVIE
MUSIC
MSUR BACK
DECODING Press to select the surround back decoding mode (page
43).
NSLEEP Press to activate the Sleep
Timer function and the
duration which the receiver
turns off automatically (page
72).
ODIMMER Press to adjust the brightness
of the display (page 50).
PMEMORY/
ENTER Press to store a station or enter the selection when
selecting the settings (page
27, 59).
QVIDEO 2 IN/
PORTABLEAV
IN jacks
Connects to a portable audio/
video component such as a
camcorder or video game
(page 24, 34).
RAUTO CAL
MIC jack Connects to the supplied optimizermicrophoneforthe
Auto Calibration function
(page 29).
SPHONES jack Connects to headphones
(page 78).
7GB
Getting Started
About the indicators on the display
SW
LFE
SP A
SP B
LC
SL S
;
D EX
;
PLIIx
;
PL OPT DTS-ES 96/24 MEMORY RDS ST
MONOD.RANGECOAXHDMI NEO:6
SB
SBL
R
SR
SBR
1 2 3 4 5 6 7 98
q;qaqg qdqf qs
Name Function
ASW Lights up when sub woofer
selection is set to “YES” (page
47) and the audio signal is
output from the SUB
WOOFER jack.
BLFE Lights up when the disc being
played back contains an LFE
(Low Frequency Effect)
channel and the LFE channel
signal is actually being
reproduced.
CSP A/SP B Lights up according to the
speakersystem used. However,
these indicators do not light up
if the speaker output is turned
off or if headphones are
connected.
D;D/
;D EX “;D” lights up when the receiver is decoding Dolby
Digital signals.
“;D EX” lights up when the
receiver is decoding Dolby
Digital Surround EX signals.
Note
When playing a Dolby Digital
format disc, be sure that you
have made digital connections
and that INPUT MODE is set
to “AUTO” (page 68).
Name Function
E; PL/
; PLII/
; PLIIx
“; PL” lights up when the
receiver applies Pro Logic
processing to 2 channel signals
inorderto output the centerand
surround channel signals.
“; PLII” lights up when the
Pro Logic II Movie/Music/
Game decoder is activated.
“; PLIIx” lights up when the
Pro Logic IIx Movie/Music/
Game decoder is activated.
However, these indicators do
not light up if both the center
andsurroundspeakersaresetto
“NO” (page 40) and you select
a sound field using the A.F.D.
button.
Note
Dolby Pro Logic IIx decoding
does not function for DTS
format signals or for signals
with a sampling frequency of
more than 48 kHz.
FOPT Lights up when INPUT MODE
is set to “AUTO” and the
source signal is a digital signal
being input through the
OPTICAL jack (page 68).
continued
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TEL [phone] QQ 376315150 892498299 TEL [phone] QQ 376315150 892498299
http://www.xiaoyu163.com
http://www.xiaoyu163.com

STR-DG720
8
8GB
Name Function
GDTS/
DTS-ES/
DTS 96/24
“DTS” lights up when the
receiver is decoding DTS
signals.
“DTS-ES” lights up when the
receiver is decoding DTS-ES
signals.
“DTS 96/24” lights up when
the receiver is decoding DTS
96/24 (96 kHz/24 bit) signals.
Note
When playing a DTS format
disc, be sure that you have
made digital connections and
that INPUT MODE is set to
“AUTO” (page 68).
HMEMORY Lights up when a memory
function, such as Preset
Memory (page 59), etc., is
activated.
ITuner
indicators Lights up when using the receiver to tune in radio
stations (page 57), etc.
Note
“RDS” appears for models of
area code CEL, CEK only.
JPreset
station
indicators
Lights up when using the
receiver to tune in radio
stations you have preset. For
details on presetting radio
stations, see page 58.
KD.RANGE Lights up when dynamic range
compression is activated (page
38).
LNEO:6 Lights up when DTS Neo:6
Cinema/Music decoder is
activated (page 52).
MCOAX Lights up when INPUTMODE
is set to “AUTO” and the
source signal is a digital signal
being input through the
COAXIAL jack (page 68).
NHDMI Lights up when the receiver
recognizes a component
connected via an HDMI IN
jack (page 20).
Name Function
OPlayback
channel
indicators
L
R
C
SL
SR
S
SBL
SBR
SB
The letters (L, C, R, etc.)
indicate the channels being
played back. The boxes around
the letters vary to show how the
receiver downmixes the source
sound (based on the speaker
settings).
Front Left
Front Right
Center (monaural)
Surround Left
Surround Right
Surround (monaural or the
surround components obtained
by Pro Logic processing)
Surround Back Left
Surround Back Right
Surround Back (the surround
back components obtained by
6.1 channel decoding)
Example:
Recording format (Front/
Surround): 3/2.1
Output channel: When
surround speakers are set to
“NO” (page 40)
Sound Field: A.F.D. AUTO
SW
LCR
SL SR
9GB
Getting Started
Rear panel
655 47
3211
HDMI
SAT IN DVD IN BD IN OUT
SA-CD / CD / CD-R
OUT IN IN
L
R
Y
P
B /
C
B
P R /
C
R
DIGITAL
(ASSIGNABLE)
DMPORT
OPTICAL
OPTICAL
SAT
IN
DVD
IN
COAXIAL
IN
TV
TV
SUBWOOFER
AUDIO
IN
VIDEO
IN
SAT
MONITOR COMPONENT VIDEO
AUDIO
IN
VIDEO
IN
AUDIO
IN
VIDEO
IN
DVD
AUDIO
OUT AUDIO OUT
VIDEO
OUT VIDEO OUT
SAT IN DVD IN VIDEO 1 IN MONITOR OUT
VIDEO 1
SURROUND BACK SURROUND CENTER FRONT B
FRONT A
LLRLRR
SPEAKERS
L
R
DC5V
0.7A MAX
AM
ANTENNA
ADIGITAL INPUT/OUTPUT section
OPTICAL
IN jacks Connects to a DVD player, etc. The
COAXIAL jack
provides a better
sound quality (page
22, 23).
COAXIAL IN
jack
HDMI IN/
OUT* jacks Connects to a DVD player, satellite
tuner, or a Blu-ray
disc player. The
image is output to a
TV or projector
while the sound can
be output from a TV
or/and speakers
connected to this
receiver (page 20).
BANTENNA section
FM
ANTENNA
jack
Connects to the
supplied FM wire
antenna (aerial)
(page 26).
AM
ANTENNA
terminals
Connects to the
supplied AM loop
antenna (aerial)
(page 26).
CCOMPONENT VIDEO INPUT/
OUTPUT section
Y,PB/CB,PR/CR
IN/OUT* jacks Connects to a DVD player, TV,
satellite tuner, etc.
You can enjoy
high quality image
(page 17–23).
DSPEAKERS section
Connects to the
speakers (page 15).
EAUDIO INPUT/OUTPUT section
AUDIO IN/
OUT jacks Connectsto a Super Audio CD player,
CD recorder, etc.
(page 18).
AUDIO OUT
jack Connects to a sub
woofer (page 15).
Green
(Y)
Blue
(PB/CB)
Red
(PR/CR)
White (L)
Red (R)
Black
continued
11GB
Getting Started
Name Function
ATV ?/1
(on/standby) Press TV ?/1and TV (O) at the same time to turn the TV
on or off.
AV ?/1
(on/standby) Press to turn on or off the Sonyaudio/videocomponents
that the remote is assigned to
operate (page 74).
If you press ?/1(B) at the
same time, it will turn off the
receiver and other Sony
components (SYSTEM
STANDBY).
Note
The function of the AV ?/1
switch changes automatically
each time you press the input
buttons (C).
B?/1
(on/standby) Presstoturn the receiveron or off.
To turn off all Sony
components, press ?/1and
AV ?/1(A) at the same time
(SYSTEM STANDBY).
CInput buttons Press one of the buttons to
select the component you
want to use. When you press
any of the input buttons, the
receiver turns on. The buttons
arefactory assigned tocontrol
Sony components.
You can change the button
assignments following the
steps in “Changing button
assignments” on page 74.
D2CH Press to select a sound field.
A.F.D.
MOVIE
MUSIC
ETHEATRE Press to enjoy optimal image
suited for movies and to
output the sound from the
speakers connected to this
receiver automatically.
Note
This button will only function
if your TV is compatible with
Theatre Mode.
Refer to the operating
instructions supplied with the
TV for details.
Name Function
FDVD/BD
MENU Press to display the menu of the DVD or Blu-ray disc on
theTVscreen. Then, useV,v,
B,band (Q) to perform
menu operations.
AUTO CAL Press to activate the Auto
Calibration function.
GD.TUNING Press to enter direct tuning
mode.
D.SKIP Press to skip a disc when
using a multi-disc changer.
HENTER Press to enter the value after
selecting a channel, disc or
track using the numeric
buttons of the TV, VCR or
satellite tuner.
MEMORY Press to store a station.
IAMP MENU Press to display the menu of
the receiver. Then, use V,v,
B,band (Q) to perform
menu operations.
JTOOLS/
OPTIONS Press to display and select the
options of the DVD player or
Blu-ray disc player.
Press TOOLS/OPTIONS and
TV (O) at the same time to
display the options applicable
to the Sony TV.
KMUTING Press to turn off the sound
temporarily.
Press MUTING again to
restore the sound.
Press MUTING and TV (O)
at the same time to activate
the TV’s muting function.
LTV VOL
+a)/– Press TV VOL +/– and TV
(O)atthe same timetoadjust
the volume level of the TV.
MASTER
VOL +a)/– Press to adjust the volume
level of all speakers at the
same time.
continued
10GB
* You can watch the selected input image when you
connect the MONITOR OUT or HDMI OUT jack
to a TV or projector (page 17).
You can use the supplied RM-AAU023
Remote Commander to operate the receiver
and to control the Sony audio/video
components that the remote is assigned to
operate (page 74).
FVIDEO/AUDIO INPUT/OUTPUT
section
AUDIO IN/
OUT jacks Connects to aVCR, DVD player, etc.
(page 17–24).
VIDEO IN/
OUT* jacks
GDMPORT
DMPORT
jack Connects to a DIGITALMEDIA
PORT adapter
(page 70).
White (L)
Red (R)
Yellow
Remote commander
123
46
78
0/10 ENTER
9
SYSTEM STANDBY
TV INPUT
SLEEP DMPORT
VIDEO1 VIDEO2 BD DVD
2CH A.F.D.
RETURN/EXIT
TV CH –
PRESET – TV CH + PRESET +
TUNING –
TV
TUNING +
FM MODE
REPLAY ADVANCE
MOVIE MUSIC
AMP MENU
CLEAR
DISPLAY MUTING
TV VOL
MASTER VOL
DVD/BD
MENU
AUTO CAL
D.TUNING
D.SKIP
THEATRE
SAT TV SA-CD/CD TUNER
?/1
-
.
HMm
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TV
?/1
AV
?/1
MEMORY
MENU/HOME
TOOLS/
OPTIONS
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TEL [phone] QQ 376315150 892498299 TEL [phone] QQ 376315150 892498299
http://www.xiaoyu163.com
http://www.xiaoyu163.com

STR-DG720
9
12GB
Name Function
MMENU/HOME Press to display the menu of
the VCR, DVD player,
satellite tuner or Blu-ray disc
player on the TV screen.
Press MENU/HOME and TV
(O) at the same time to
display the TV’s menu.
Then, use V,v,B,band
(Q) to perform menu
operations.
N./>b) Press to skip a track of the CD
player,DVD playeror Blu-ray
disc player.
REPLAY /
ADVANCE Press to replay the previous scene or fast forward the
current scene of the VCR,
DVD player or Blu-ray disc
player.
m/Mb) Press to
– search tracks in the forward/
reversedirectionoftheDVD
player.
– start fast forward/rewind of
the VCR, CD player or Blu-
ray disc player.
Ha)b) Press to start playback of the
VCR, CD player, DVD player
or Blu-ray disc player.
Xb) Press to pause playback or
recording of the VCR, CD
player,DVD playeror Blu-ray
disc player. (Also starts
recording with components in
recording standby.)
xb) Press to stop playback of the
VCR, CD player, DVD player
or Blu-ray disc player.
TV CH +/– Press TV CH +/–and TV (O)
at the same time to select
preset TV channels.
PRESET +/– Press to select
– preset stations.
– preset channels of the VCR
or satellite tuner.
TUNING +/– Press to scan a station.
FM MODE Press to select the FM
monaural or stereo reception.
<
<
Name Function
OTV Press TV and the button with
orange printing at the same
time to enable TV operation.
PRETURN/
EXIT OPress to
– return to the previous menu.
– exit the menu while the
menu or on-screen guide of
the VCR, DVD player,
satellite tuner or Blu-ray
disc player is displayed on
the TV screen.
Press RETURN/EXIT O
and TV (O) at the same time
to return to the previous menu
or exit the TV’s menu while
the menu is displayed on the
TV screen.
Q

V/v/B/b
After pressing DVD/BD
MENU (F), AMP MENU
(I), or MENU/HOME (M),
pressV,v,Bor bto selectthe
settings. Then, press to
enter the selection if you have
pressed DVD/BD MENU or
MENU/HOME previously.
Press also to enter the
selection of the receiver,
VCR, satellite tuner, CD
player, DVD player or Blu-
ray disc player.
RDISPLAY Press to select information
displayed on the TV screen of
the VCR, satellite tuner, CD
player, DVD player or Blu-
ray disc player.
Press DISPLAY and TV (O)
at the same time to display
TV’s information on the TV
screen.
S-/-- Press to select the channel
entry mode, either one or two
digits of the VCR.
Press -/-- and TV (O) at the
same time to select the
channel entry mode, either
one or two digits of the TV.
>10 Press to select the track
numbers over 10 of the CD
player.
CLEAR Press to clear a mistake when
you press the incorrect
numeric button.
,
13GB
Getting Started
a)The number 5, TV VOL +, MASTER VOL + and
Hbuttonshavetactiledots.Use the tactiledots as
references when operating the receiver.
b)This button is also available for DIGITAL MEDIA
PORT adapter operation. For details on the
function of the button, refer to the operating
instructions supplied with the DIGITAL MEDIA
PORT adapter.
Notes
•Some functions explained in this section may not
work depending on the model.
•The above explanation is intended to serve as an
example only. Therefore, depending on the
component, the above operation may not be
possible or may operate differently than described.
Name Function
TNumeric
buttons
(number 5a))
Press to
– preset/tune to preset
stations.
– select track numbers of the
CD player, DVD player or
Blu-ray disc player. Press
0/10 to select track number
10.
– select channel numbers of
the VCR or satellite tuner.
Press the numeric buttons and
TV (O) at the same time to
select the TV channels.
UTV INPUT Press TV INPUTandTV(O)
at the same time to select the
input signal (TV input or
video input).
SLEEP Press to activate the Sleep
Timer function and the
duration which the receiver
turns off automatically.
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Q Q
TEL [phone] QQ 376315150 892498299 TEL [phone] QQ 376315150 892498299
http://www.xiaoyu163.com
http://www.xiaoyu163.com

STR-DG720
10
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
2-4. DIGITAL BOARD
(Page 12)
2-5. MAIN BOARD SECTION
(Page 12)
2-1. CASE
(Page 10)
2-2. BACK PANEL SECTION
(Page 11)
SET
2-3. FRONT PANEL SECTION
(Page 11) 2-6. STANDBY BOARD
(Page 13)
case
two screws
(+BVTP 3 ×8)
two screws
(+BVST 4 ×8) (black)
two screws
(+BVTT 4 ×8) (silver)
two screws
(+BVST 4 ×8) (black)
two screws
(+BVTT 4 ×8) (silver)
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Q Q
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STR-DG720
11
2-2. BACK PANEL SECTION
2-3. FRONT PANEL SECTION
CNP901 (2P)
CN3509 (5P)
CN102 (5P)
RM back panel section
RH CNP203 (4P)
RI CN103 (3P)
RK CNP240 (3P)
RL CNP242 (3P)
screw
(+BVTP 3 ×8)
four screws
(+BVTP 3 ×8)
four screws
(+BVTP 3 ×8)
RB three screws
(+BVTP 3 ×8)
RT four screws
(+BVTP 3 ×8)
RE two screws
(+BVTP 3 ×8)
RG
wire (flat type) (9 core)
(CNS508) (US, CND)
wire (flat type) (11 core)
(CNS507) (AEP, UK)
wire (flat type) (7 core)
(CNS503) (US, CND)
wire (flat type) (7 core)
(CNS509)
wire (flat type) (17 core)
(CN3511)
five screws
(+BVTP 3 ×8)
wire (flat type) (17 core)
(CNS506)
front panel section
CNP790 (4P)
CNP910 (3P)
CNP500 (3P)
CNP430 (3P)
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2
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4 2
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Q Q
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STR-DG720
12
2-4. DIGITAL BOARD
2-5. MAIN BOARD SECTION
screw
(+BVTP 3 ×8)
CNP410
CNP411
DIGITAL board
CNP503 (7P)
CNP512 (3P)
CNP505 (8P)
two screws
(+BV3 (3-CR))
MAIN board section
two screws
(+BV3 (3-CR))
screw
(+BV3 (3-CR))
CNP912 (6P)
CNP940 (6P)
CNP921 (3P)
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2
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4 2
9 8
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Q Q
TEL [phone] QQ 376315150 892498299 TEL [phone] QQ 376315150 892498299
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STR-DG720
13
2-6. STANDBY BOARD
screw
(+BVTP 3 ×8) CNP901 (3P)
CN4001
STANDBY board
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Q Q
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STR-DG720
14
SECTION 3
TEST MODE
AM CHANNEL STEP 9 kHz/10 kHz SELECTION MODE
(US, Canadian model only)
* Either the 9 kHz step or 10 kHz step can be selected for the AM
channel step.
* Procedure:
Turn the [INPUT SELECTOR] control to set AM and press the
[?/1] button to turn off the main power.
While depressing the [TUNING MODE] button, press the [?/1]
button to turn on the main power.
Either the message “9k STEP” or “10k STEP” appears for a mo-
ment and select the desired step.
VACUUM FLUORESCENT DISPLAY TEST MODE
* All fluorescent segments are tested.
When this test is activated, all segments light on at the same time,
then each segment lights on one after another.
* Procedure:
While depressing the [TUNING MODE] and the [DISPLAY]
buttons simultaneously, press the [?/1] button to turn on the
main power.
1. ALL segments light on.
2. Turn the [INPUT SELECTOR] control, confirm display.
3. Turn the [INPUT SELECTOR] control, confirm display.
4. Turn the [INPUT SELECTOR] control, all segments light off.
SOUND FIELD CLEAR MODE
* The preset sound field is cleared when this mode is activated.
Use this mode before returning the product to clients upon com-
pletion of repair.
* Procedure:
While depressing the [2CH] button, press the [?/1] button to turn
on the main power.
The message “S.F. CLR.” appears for a moment and initialization
is performed.
SOFTWARE VERSION DISPLAY MODE
* The software version is displayed.
* Procedure:
While depressing the [SPEAKERS (OFF/A/B)] and the [DIS-
PLAY] buttons simultaneously, press the [?/1] button to turn on
the main power.
The model name, destination and the software version are dis-
played for a moment.
KEY CHECK MODE
* Button check
* Procedure:
While depressing the [SPEAKERS (OFF/A/B)] and the [2CH]
buttons simultaneously, press the [?/1] button to turn on the
main power.
Either the message “REST 14” appears.
Every pressing of any button other than the [?/1] counts down
the buttons. The buttons which are already counted once are not
counted again. When all buttons are pressed “REST 00” ap-
pears.
SWAP ALL MODE
* When this mode is used, output the audio signal of front L/R
channel to all channel.
* Procedure:
1. While pressing the [MEMORY/ENTER] and [DISPLAY] but-
tons, press the [?/1] button to turn on the main power.
2. The message “DSP TEST” appears.
3. Press the [AMPMENU] button on the remote commander, and
the message “9_DSPTST” appears.
4. Press the [b] button on the remote commander to enter the
DSP test mode menu.
5. Press the [v] button on the remote commander twice to enter
the swap mode, and the message “SWP.AUTO” appears.
6. Press the [b] button on the remote commander twice to select
“SWP.[]ALL”.
SHIPMENT MODE
* All preset contents are reset to the default setting.
* Procedure:
1. While depressing the [SPEAKERS (OFF/A/B)] and the [MU-
SIC] buttons simultaneously, press the power [?/1] button to
turn on the main power.
2. “CLEARED” appears and switch off the set.
RE-BOX CLASSIFICATION TEST MODE
* Procedure:
1. While pressing the [MEMORY/ENTER] and the [INPUT
MODE] buttons simultaneously, press the power [?/1] button
to turn on the main power.
2. “R.BOX[][][]xxx” appears.
3. xx indicates number of times set powered on.
4. Press any button or power off the set to release test mode.
L
SW
CR
SL S SR
SBL SB SBR
LFE
SPA NEO:6COAX
HDMI
DEX DTS-ESxIIPL RDS STCAT96/24 MONO
D.RANGE SAT
D
D D D
PL OPT
D
D
dB
Hzkft.m
MHz
MEMORY
SPB
L R
S
LFE
NEO:6COAX
HDMI
EX -ESx RDS
MONO
D.RANGE SAT
k
m
MHz
SPB
SW
C
SL SR
SBL SB SBR
DDTS STCAT
D
D
PL
D
D
dB
Hz
ft.
MEMORY
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Q Q
TEL [phone] QQ 376315150 892498299 TEL [phone] QQ 376315150 892498299
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STR-DG720
15
DCAC FACTORY TEST MODE
DCAC Factory Test mode have two stages:
1. DCAC DSP Data Line Checking
2. DCAC board Checking
Factory Test System Setup
1. When power off:
Press the three buttons [MEMORY/ENTER] + [MOVIE] +
[?/1].
“DCAC[]FTM” appears.
Afterward, press the [TUNING MODE] to start DCAC factory
test mode.
1. DCAC DSP Data Line Checking
After press the [TUNING MODE], DCAC Factory test mode will
start, below display will show:
“DCAC[][][]x” x=1, 2, 3, 4
If there is error happen, below display will show:
“ERR[]SD0x” x=1 tD1501 or R1530 problem
x=2 tD1502 problem
x=3 tD1503 problem
x=4 tD1504 problem
2. DCAC board Checking
Connect front left speaker of the receiver and AUTO CAL micro-
phone. Turn [MASTER VOLUME] jog, there will be test tone
sound output from front left speaker, and the display will change
accordingly.
“AD[]-[]xxx” xxx=0 to 255 (depends on loudness of test tone)
SECTION 4
FM TUNER CHECK
FM AUTO STOP CHECK
Procedure:
1. Turn on the set.
2. Input the following signal from Signal Generator to FM
antenna input directly.
* Carrier Frequency: A=87.5 MHz, B=98 MHz, C=108 MHz
Deviation : 75 kHz
Modulation : 1 kHz
ANT input : 35 dBu (EMF)
Note:
Please use 75 ohm “coaxial cable” to connect SG and the set. You
cannot use video cable for checking.
Please use SG whose output impedance is 75 ohm.
3. Set to FM tuner function and scan the input FM signal with
automatic scanning.
4. Confirm that input Frequency of A, B and C are detected and
automatic scanning stops.
The stop of automatic scanning means “The station signal is re-
ceived in good condition.”
DSP Data Line
Check
Start Pass Pass
Auto Cal Mic
Check END
SPK Front Left
DCAC MIC
Receiver
generator
OUT (75 Ω)
set
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Q Q
TEL [phone] QQ 376315150 892498299 TEL [phone] QQ 376315150 892498299
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STR-DG720
16
SECTION 5
DIAGRAMS
• Circuit Boards Location
DIGITAL board
MAIN board
STANDBY board DCDC CONVERTER board
DCAC board
HEADPHONE board
VIDEO 2 board
POWER board
DISPLAY board
HDMI RE board
VIDEO board
XM board
(US, Canadian
model only)
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7
6 3
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0 9 9
2
8 9
4 2
9 8
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Q Q
TEL [phone] QQ 376315150 892498299 TEL [phone] QQ 376315150 892498299
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STR-DG720
STR-DG720
1717
C-CH
SR-CH
FR-CH
SL-CH
FL-CH
FR-IN
FL-IN
SW
SEL
C
SEL
SL
SEL
R-CH
R-CH
R-CH
R-CH
ELECTRICALVOLUME
IC400
VCCVEE
+7V
SEL
SW
MCU
I/F
–7V
SW OUT
C OUT
SLOUT
FLOUT
• Signal path
: TUNER (FM/AM)
: VIDEO (AUDIO)
: CD (ANALOG)
• R-ch is omitted due to
same as L-ch.
117
21
24
AUDIO
LR
VIDEO 2 IN/
PORTABLE AV IN TV
AM
DMPORTAMP
IC3002
TN1
TUNER UNIT
SYSTEM
CONTROL
IC1010 (1/6)
SA-CD/CD/CD-R
LRLR
J298 (2/2)
R-CH
TUNE_LAT
R–CH
22 TUNE_DI
23 T_CLK
VOL_DA
RCH
VOL_CL
US,CND MODEL
AEP,UK MODEL
RDS SIGNAL
TUNE_DO
L-CH
R-CH
SD
CE
DO/ST/SD
DI
CL
C LINK_RX
C LINK_TX
DET
L
5
6
7
13
14
2
4
R
VBUS+5V
VIDEO 5V
R-CH R-CH R-CH R-CH
TU+9V
100 CLINK_RX
CLINK_TX
101 CLINK_DET
XM RESET
XML
XMR
11
10
XM RESET 94 XMDACMS
XM DBPOWER
XM DACMS 2
FM 75Ω
COAXIAL
ANTENNA
DMPORT
J1302
DC 5V
0.7AMAX
-3 -4 -5 -6 LR
R-CH
-3 -4-2 -3
86 RDS INT/XMDBPOWER
87
99
RDS DATA
AEP,UK MODEL
RDS INT
RDS DATA
17
DMPORT_VIDEO DMPORT VIDEO
63
34
AUDIO IN
LR
VIDEO 1
J404 (1/2) J401 (1/2)
R-CH
-3 -4
R-CH
AUDIO OUT
LR
J404 (2/2)
VIDEO 1
-1 -2
R-CH
OUT
LR
J401 (2/2)
SA-CD/CD/CD-R
-1 -2
IN IN LR
J403
-1 -2
SAT
AUDIO IN
DVD
AUDIO IN
12 8
10
11
75
14
13
18
17
SW-CH
16
71 70 68 72
43
41
47
51
39
55
61
15
SBL
SEL
SBLOUT
SBL-CH
66
20
SBR-CH
19
76
27
29
L
SEL
3 1
4 2
+5V REG
IC1012 2 1
+6.3V REG
IC4001
2 1
+4.1V REG
IC4100
F4001
+6.3V
+4.1V
RECT
D4001 R2AC
R2AC
F4002
DIGITAL
SECTION B
DIGITAL
SECTION
A
POWER
SECTION
F
VIDEO
SECTION
C
XM
SECTION
DPOWER
SECTION
E
JR435
•Abbreviation
CND : Canadian model
5-1. BLOCK DIAGRAM – TUNER/AUDIO Section –
(Page 21)
(Page 23)
(Page 18)
(Page 18)
(Page 23)
(Page 19)
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4 2
9 8
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Q Q
TEL [phone] QQ 376315150 892498299 TEL [phone] QQ 376315150 892498299
http://www.xiaoyu163.com
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STR-DG720
STR-DG720
1818
DPSOA
DPSOD
DPSOC
DPSOB
DOUT 92
3
NONAUDIO
AUDIO 24
XMCK
20 97
DPSIA
78
CKOUT 13
BCK 14
LRCK 15
DATAO
64
71
70
65
X1302
25MHz
X1301
12.288MHz
CLKIN 142
DPFSCK 94
DPDVLRCK 86
XTAL 143
15
49 65 75 7364
FLAG1
ERROR
HDMI ERROR
HDMI SPDIF
BCK
MCK
SD0-SD3
LRCK
21
22
SCKI
6
BCK
8
LRCK
7
45 46 47 48
38 37 36 35 47 17
INPUT DATA
DEMODULATOR
Pa,Pb DETECTION LOCK
DETECTION
MICROPROCESSOR
I/F
C bit DETECTION 34 16
DPSIB
SD2
SD1
SD0
SD3
79
DPSIE
82
DPSIC
80 DPSID
81
16
DVD
IN
DIGITAL
(ASSIGNABLE)
(COAXIAL)
1
TV
IN
(OPTICAL) OUT
OPTICAL
RECEIVER
IC1352
IC1303
DIGITALAUDIO
INTERFACE RECEIVER
IC1301
J1301 23 WAVE
SHAPER
+3.3V
VDD
FL-IN DIGITAL
DECIM.
FILTER
ADC
IC1401
DSP EX3
IC1009
CLOCK SELECTOR
IC1008
8
DSP_SELECT
50
DIR ERROR
63
DIR DATAO
DSP RESET
HDMI_FSRATE
DSP SPIDS
DSP MOSI
DSP SPICLK
DSP MISO
RESET SPIDS MOSI SPICLK MISO FLAG0
DIR CLK
66
74ACT153_B
67
74ACT153_A
DIR CE
DIR DI
DIR DO
DIR XSTATE
CLK CE DI DO CKSEL1
38
48
DIR XMODE
39 29
DIRCKST
XMODE XSTATE
5
XOUT
DIN2
1
SAT
IN
(OPTICAL) OUT
OPTICAL
RECEIVER
IC1351
3DIN0
XIN
D1301
D1501
SYSTEM
CONTROL
IC1010 (2/6)
TUNER/
AUDIO
SECTION
B
TUNER/
AUDIO
SECTION
HDMI RE
SECTION
A
G
$3
MOD.
DSP INT
1114
2627
DAC_MUTE
DAC_DI
DAC_CLK/XMDACMC
DAC_ATC
XMDACMDI
MUTE M
12
1
MC
13
4
MD
3
DIN3 FLOUT
R-CH
VO3L
VO3R
VO1L
VO1R
VO2L
VO2R
95
26
25 7
AMP
IC1406
7
8
10
2MCK
3BCK
LRCK
US,CND MODEL
4
DPDVBCK 87
8CH DAC
IC1452
DAC
DIN1 SLOUT
R-CH
5
R-CH
22
21 7
XM
SECTION
H
POWER
SECTION
I
XM DACMDI
XM DACMC
PROTECTOR
AMP
IC1404
DAC
DIN2 C OUT
523 7
SW OUT
324 1
AMP
IC1405
DAC
VO4L
VO4R
DIN4 SBLOUT
519 7
20 AMP
IC1403
DAC
13 VINL
FR-IN 14 VINR
D1504 D1503 D1502
SELECTOR
IC1302
75 IC1
3
14 2
IC3
4IC2
1Y
ERROR
DETECT
IC1017
51 A
2
6
B
A/B
Y
IC1016 1
8
AB
4
5
6SPLRCK
88
7
11
10
14
13 DPBCK
89
1
12
CLOCK
GENERATOR
+1.2V
VDDI
+3.3V
VDDE
74 81
125 127122121 126
9
SWITCH
IC1014
5 1
• Signal path
: TUNER (FM/AM)
: VIDEO (AUDIO)
: DVD (DIGITAL)
• R-ch is omitted due to
same as L-ch.
•Abbreviation
CND : Canadian model
5-2. BLOCK DIAGRAM – DIGITAL Section –
(Page 17)
(Page 17)
(Page 21)
(Page 20)
(Page 23)
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2
8 9
4 2
9 8
T E L 1 3 9 4 2 2 9 6 5 1 3 9 9 2 8 9 4 2 9 8 0 5 1 5 1 3 6 7 3
Q Q
TEL [phone] QQ 376315150 892498299 TEL [phone] QQ 376315150 892498299
http://www.xiaoyu163.com
http://www.xiaoyu163.com

STR-DG720
STR-DG720
1919
1CH1 IN1
CH2 IN2
CH2 IN1
CH3 IN2
CH3 IN1
CH1 IN2
CH2 IN3
CH3 IN3
CH1 OUT
CH2 OUT
CH3 OUT
2 4
Y
PB/CB
PR/CR
YSW1 SW2
COMPONENT
SW1
COMPOSITE
SW4
COMPOSITE
SW3
COMPOSITE
SW2
COMPOSITE
SW1
COMPONENT
SW2
PB/CB
PR/CR
Y
PB/CB
PR/CR
J221
J220 (1/2)
J210 (1/2)
24
75Ω
DRIVER
6dBAMP
22
75Ω
DRIVER
6dBAMP
20
75Ω
DRIVER
6dBAMP
23
PS
PS
(V-MUTE)
14
D210 D211
10 4
13
J211 (1/2)
3
5
SAT
IN
DVD
IN
VIDEO 1
IN
VIDEO
IN
VIDEO
IN
COMPONENT
VIDEO
–1
–2
–3
–1
-2
–3
-4
–5
–6
Y
PR/CR
PB/CB
J220 (2/2)
MONITOR
OUT COMPONENT
VIDEO
–7
1
75Ω
DRIVER
6dBAMP
15
3 1
75Ω
DRIVER
6dBAMP
-2
J210 (2/2)
J211 (2/2)
–8
–9
–1
VIDEO 1
DVD
SAT
–2
VIDEO
IN
–1
VIDEO
OUT
VIDEO 1
-3
VIDEO
OUT
MONITOR
+5V
REG
IC201
+5V-3
3 2
–5V
REG
IC202
–5V-3
COMP_S1
COMP_S2
V_SW2
V_SW4
PS(V-MUTE)
V_SW1
COMPONENT SW1
COMPONENT SW2
PS(V-MUTE)
COMPOSITE SW1
COMPOSITE SW2
COMPOSITE SW3
COMPOSITE SW4
SYSTEM CONTROL
IC1010 (3/6)
V– –5V-3
V+ +5V-3
+15V
–15V
VOUT1
VOUT2
V-1,-2 –5V-3
V+1,+2+5V-3
VIN1
J298 (1/2)
9
VIDEO
–1
VIDEO 2 IN/
PORTABLE AV IN
VIN2
7VIN3
VIN5
VIN4
SW1 SW2 SW3
6
SW4
INPUT SELECT
IC210
COMPONENT VIDEO SELECT
IC220
2
SW5
35
36
37
34
33 V_SW3
32
31
3CH1 IN3
5
8
10
12
17
15
13
DMPORT VIDEO
TUNER/AUDIO
SECTION C
• Signal path
: VIDEO
5-3. BLOCK DIAGRAM – VIDEO Section –
(Page 17)
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4 2
9 8
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TEL [phone] QQ 376315150 892498299 TEL [phone] QQ 376315150 892498299
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STR-DG720
STR-DG720
2020
58 A34
DATA2+
DATA2–
DATA1+
DATA1–
DATA0+
DATA0–
CLOCK+
CLOCK–
CEC
SCL(5V)
SDA(5V)
+5V POWER
HOT PLUG DET
DATA2+
DATA2–
DATA1+
DATA1–
DATA0+
DATA0–
CLOCK+
CLOCK–
CEC
SCL(5V)
SDA(5V)
+5V POWER
HOT PLUG DET
57 B34
55 A33
54 B33
39
SDA_SINK
1
3
4
6
7
9
10
12
13
15
16
18
19
1
3
4
6
7
9
10
12
13
15
16
18
19
CN3501
CN3502
SWITCHER
IC3503
SAT IN
10 7
38
SCL_SINK
52 A32
51 B32
49 A31
48 B31
46 SCL3
45 SDA3
44 HPD3
A24
B24
A23
B23
A22
B22
A21
B21
SCL2
SDA2
HPD2
41 DSDA
42 DSDL
51 RXC+ 1
VSYNC
QE23
I
QE0
128
HSYNC 127
DE
70
SPDIF 75
WS 76
SCK
SD3
I
SD0
79
MCLK
39
CSDA 40
CSCL
67
MUTE
50 RXC–
55 RXO+
54 RXO–
59 RX1+
58 RX1–
63 RX2+
62 RX2–
44 PWR5V
91 INT
89 RESET
21 RX_HPDI
51 TMDS_S1
52 TMDS_S2
19 RX_RST
20 RS_INT
XOUT
XIN
35
11
13
EEPROMSEL1
41
TX_5VPWR 42
TX_RST 43
28 27
TX_INT
65
MUTE 33
TX 34
RX
30 HDMI_ERR
102 HDMI RX
103 HDMI TX
88
104
7
CEC IN
HDMI RESET
HDMI REG CTRL
10
RESET 29
232C_OUT 30
232C_IN 7
CNVSS
53 TMDS_S3
54 TMDS_OEB
55 P5V_SELA
56 P5V_SELB
3
10
9
EEPROM DATASELECT
IC3521 EEPROM IC3509
HDMI RX
IC3511
92-96,
99-105,
108-111,
114-117,
119,
121-124
35
33
36
32
2
HDMI SPDIF
SD0 –SD3
HDMI ERROR
HDMI TX
IC3513
1
80
5
11
12
6
44
43
30
29
27
26
20
19
+6.3V
42
18
17
49-58,
61-70,
75-79
40
HPD_SINK 21
S1 22
S2 23
S3 42
OE
35
Z1 34
Y1
32
Z2 31
Y2
29
Z3 28
Y3
26
Z4 25
Y4
DATABUFFER
Q3504
IC3501 (2/2)
5 4
1
77
76
74
73
71
70
68
67
64
63
62
DATA2+
DATA2–
DATA1+
DATA1–
DATA0+
DATA0–
CLOCK+
CLOCK–
CEC
SCL(5V)
SDA(5V)
+5V POWER
HOT PLUG DET
1
3
4
6
7
9
10
12
13
15
16
18
19
A14
B14
A13
B13
A12
B12
A11
B11
SCL1
SDA1
HPD1
15
14
12
11
9
8
6
5
3
2
80
+5V REG
Q305–307
POWER DETECT
IC3501 (1/2) POWER SELECT
IC3504
1
5
2
4
3
6
5
14
135SDA
13 6SCL
CN3503
BD IN
HDMI DVD IN
HDMI
CN3504
OUT
CN3510
2RESET
232C_OUT
232C_IN
CNVSS
3.3V
3
5
1
7
9 8
+4.1V
HDMI+1.8V
HDMI+3.3V 4 2
4 2
1
1
3 1
+1.8V REG
IC3528 +3.3V REG
IC3527
+3.3V REG
IC3526
SYSTEM CONTROL
IC1010 (4/6)
X3501
28.322MHz
84 XTALOUT
85 XTALIN
X3502
10MHz HDMI CONTROL
IC3519
DIGITAL
SECTION
G
12
71
I
74
7
I
10
CSCLCSDA
CEC BUFFER
Q1103-1106
CSDA
CSCL
RESET
HPD
INT
TX2–
TX2+
TX1–
TX1+
TX0–
TX0+
TXC–
TXC+
VSYNC
D23
I
D0
HSYNC
DE
SPDIF
WS
SCK
MCLK
DSCL
DSDA
SD3
I
SD0
POWER
CONTROL
IC3516
DATA2+
DATA2–
DATA1+
DATA1–
DATA0+
DATA0–
CLOCK+
CLOCK–
CEC
HDMI+3.3V
SCL(5V)
SDA(5V)
+5V POWER
HOT PLUG DET
1
3
4
6
7
9
10
12
18
15
16
19
13
DATABUFFER
IC3507
3SDAA 6
SDAB
2SCLA SCLB 7
WP
5
LRCK
BCK
MCK
5-4. BLOCK DIAGRAM – HDMI RE Section –
(Page 18)
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