Sony STRDG-720 Service manual

STR-DG720

SERVICE MANUAL

Ver. 1.0 2008.02

Photo: Black type

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-Defi nition Multimedia Interface

TM

(HDMI
HDMI, the HDMI logo and High-Defi nition 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.

) technology.

US Model

Canadian Model

AEP Model

UK Model

SPECIFICATIONS

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.

Amplifi er section

Models of area code US, CND
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
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
140 W/ch

1)

1)

2)

(8 ohms, 1 kHz, THD 10%)

9-887-994-01

2008B04-1

2008.02

©

– Continued on next page –

MULTI CHANNEL AV RECEIVER

Sony Corporation

Audio Business Group
Published by Sony Techno Create Corporation

STR-DG720

1) Measured under the following conditions:
Area code Power requirements
US, CND 120 V AC, 60 Hz
AEP, UK 230 V AC, 50 Hz

2) Reference power output for front, center, surround and surround back
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 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 fi eld 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
With 9-kHz tuning scale: 531 – 1,710 kHz

5)

5)

Models of area code AEP, UK
With 9-kHz tuning scale: 531 – 1,602 kHz
Antenna Loop antenna
Intermediate frequency 450 kHz

General

Power requirements
Area code Power requirements
US, CND 120 V AC, 60 Hz
AEP, UK 230 V AC, 50/60 Hz

Power output (DIGTAL MEDIA PORT)
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 specifi cations are subject to change without notice.

• Abbreviation
CND : Canadian model

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

2

STR-DG720

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.

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)

To Exposed Metal
Parts on Set

MODEL IDENTIFICATION
–BACK PANEL–

Part No.

Model Part No.

US
CND
AEP, UK

• Abbreviation
CND : Canadian model

3-093-898-0[]
3-093-898-1[]
3-093-898-2[]

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 lead­free 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)

AC

1.5 kΩ0.15 μF

Earth Ground

voltmeter
(0.75 V)

Fig. A. Using an AC voltmeter to check AC leakage.

: LEAD FREE MARK

Unleaded solder has the following characteristics.

• Unleaded solder melts at a temperature about 40 °C higher
than ordinary solder.

Ordinary soldering irons can be used but the iron tip has to be

applied to the solder joint for a slightly longer time.

Soldering irons using a temperature regulator should be set to

about 350 °C.
Caution: The printed pattern (copper foil) may peel away if the

heated tip is applied for too long, so be careful!

• Strong viscosity

Unleaded solder is more viscous (sticky, less prone to fl ow)

than ordinary solder so use caution not to let solder bridges
occur such as on IC pins, etc.

• Usable with ordinary solder

It is best to use only unleaded solder but unleaded solder may

also be added to ordinary solder.

Special Component Notice

The components identifi ed by mark 9 contain confi dential infor-
mation.
Strictly follow the instructions whenever the components are re­paired and/or replaced.

Notice pour composants spéciaux

Les composants identifi és par la marque 9 contiennent des infor-
mations confi dentielles.
Suivre scrupuleusement les instructions chaque fois qu’un com­posant est remplacé et / ou réparé.

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 FONC­TIONNEMENT. NE REMPLACER CES COM- POSANTS QUE
PAR DES PIÈCES SONY DONT LES NUMÉROS SONT DON­NÉS DANS CE MANUEL OU DANS LES SUPPLÉMENTS
PUBLIÉS PAR SONY.

3

STR-DG720

TABLE OF CONTENTS

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

4

• US, Canadian model

Getting Started

Description and location of parts

Front panel

13 76542

?/1

SPEAKERS

(OFF/A/B)

AUTO CAL MIC

PHONES

Name Function

A ?/1

(on/standby)

B SPEAKERS

(OFF/A/B)

C TUNING

MODE
TUNING +/–

D Display The current status of the

E Remote

sensor

F DISPLAY Press to select infor mation

TUNING MODE

TUNING

VIDEO 2 IN/PORTABLE AV IN

VIDEO L AUDIO R

MEMORY/

qgqhqj

Press to turn the receiver on
or off (page 27, 35, 36, 56,

90).
Press to select the fro nt

speaker system (page 28).
Press or turn to operate the

tuner (FM/AM/XM) (page
57, 63).

selected component or a list
of selectable items appears
here (page 7).

Receives signals from remote
commander.

displayed on the display
(page 79).

CATEGORY

CATEGORY

ENTER

2CH A.F.D. MOVIE MUSIC

MODE

qdqf

qs

Name Function

G INPUT MODE Press to select the input mode

H MASTER

VOLUME

I MUTING Press to turn off the sound

J ANALOG

DIRECT

K INPUT

SELECTOR

DISPLAY INPUT MODE

MASTER VOLUME

INPUT SELECTOR

ANALOG
DIRECT

qa

q;

when the same components
are connected to both digital
and analog jacks (page 75).

Turn to adjust the volume
level of all speakers at the
same time (page 33, 34, 35,

36).

temporarily.
Press MUTING again to
restore the sound (page 34).

Press to listen to high quality
analog sound (page 56).

Turn to select the input
source to play back (page 34,
35, 36, 56, 57, 59, 60, 75, 78,

80).

SECTION 1

GENERAL

Getting Started

8

MUTING

9

Name Function

L 2CH Press to select a sound field

A.F.D.
MOVIE
MUSIC

M CATEGORY

MODE
CATEGORY

+/–

N MEMORY/

ENTER

O VIDEO 2 IN/

PORT ABLE AV
IN jacks

P AUTO CAL

MIC jack

Q PHONES jack Connects to headphones

(page 51).

Used when listening to XM
Radio (page 61).

Press to store a station or
enter the selection when
selecting the settings (page
27, 59, 67).

Connects to a portable audio/
video component suc h as a
camcorder or video game
(page 24, 34).

Connects to the supplied
optimizer microphone for the
Auto Calibration func tion
(page 29).

(page 85).

STR-DG720

This section is extracted
from instruction manual.

About the indicators on the display

1 2 3 4 5 6 7 q;9

SP A

D EX;PLIIx

R
SR
SBR

SP B

;

SW

LC

SL S

SB

SBL

LFE

Name Function

A SW Lights up when sub woofer

B LFE Lights up when the disc being

C SP A/SP B Lights up according to the

D ; D/

; D EX

selection is set to “YES” (page

47) and the audio signal is
output from the SUB
WOOFER jack.

played back contains an LFE
(Low Frequency Effect)
channel and the LFE channel
signal is actually being
reproduced.

speaker system used. However,
these indicators do not light up
if the speaker outpu t is turned
off or if headphones are
connected.

“; D” lights up when th e
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

F OPT Lights up when INPUT MODE

8

TACTPOLP DTS -ES 9 6/24 MEMORY ST

“; PL” lights up when the
receiver applies Pro Logic
processing to 2 channel signals
in order to output the center and
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
and surround speakers are set 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.

is set to “AUTO” and the
source signal is a digital signal
being input through the
OPTICAL jack (page 75).

continued

US

5

Getting Started

MONOD.RANGECOAXHDMI NEO:6

qaqsqh qfqg qd

US

6

Name Function

G DTS/

DTS-ES/
DTS 96/24

H CAT Lights up when category mode

I MEMORY Lights up when a memory

J Tuner

indicators

K Preset

station
indicators

L D.RANGE Lights up when dynamic range

M NEO:6 Lights up when DTS Neo:6

N COAX Lights up when INPUT MODE

O HDMI Lights up when the receiver

“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).

is set to “ONE CAT” during
XM Radio operation (page 65).

function, such as Preset
Memory (page 59), etc., is
activated.

Lights up when using the
receiver to tune in radio
stations (page 57), etc.

Lights up when using the
receiver to tune in radio
stations you have preset. For
details on presetting radio
stations, see page 58.

compression is activated (page

38).

Cinema/Music de coder is
activated (page 52).

is set to “AUTO” and the
source signal is a digital signal
being input through the
COAXIAL jack (page 75).

recognizes a component
connected via an HDMI IN
jack (page 20).

Name Function

P Playback

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 aroun d
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

continued

US

7

US

8

5

STR-DG720

Rear panel

ANTENNA

AM

VIDEO

AUDIO

TV

SAT

OPTICAL
IN jacks

COAXIAL IN
jack

HDMI IN/
OUT* jacks

SAT IN DVD IN BD IN OUT

XM

VIDEO

VIDEO

VIDEO

IN

IN

IN

OUT

MONITOR

AUDIO

AUDIO

AUDIO

IN

IN

IN

OUT

SUB WOOFER

DVD

VIDEO 1

6 5457

Connects to a

DVD player, etc.

The COAXIAL

jack provides a

better sound

quality (page 22,

23).

Connects to a

DVD player,

satellite tuner, or a

Blu-ray disc

player. The image

is output to a TV or

a projector while

the sound can be

output from a TV

or/and speakers

connected to this

receiver (page 20).

HDMI

SAT IN DVD IN VIDEO 1 IN MONITOR OUT

VIDEO
OUT

AUDIO
OUT

TV

OPTICAL

IN

SAT
IN

OPTICAL

DVD
IN

COAXIAL

(ASSIGNABLE)

DIGITAL

OUT IN IN

DC5V

0.7A MAX

L

DMPORT

R

SA-CD/CD/CD-R

A DIGITAL INPUT/OUTPUT section

321 1

Y

/

B

P
C

B

PR/
C

R

COMPONENT VIDEO

SURROUND BACK SURROUND CENTER FRONT B

LLRLRR

SPEAKERS

B ANTENNA section

C COMPONENT VIDEO INPUT/

OUTPUT section

Green
(Y)

Blue
(P

B/CB)

Red
(P

R/CR)

FRONT A

L

R

FM
ANTENNA
jack

AM
ANTENNA
terminals

XM
ANTENNA
jack

Y, PB/CB, PR/CR
IN/OUT* jacks

Connects to the
supplied FM wire
antenna (aerial)
(page 26).

Connects to the
supplied AM loop
antenna (aerial)
(page 26).

Connects to the XM
Mini-Tuner and
Home Dock (not
supplied) (page 62).

Connects to a
DVD player, TV,
satellite tuner, etc.
You can enjoy
high quality image
(page 17–23).

D SPEAKERS section

Getting Started

Connects to the
speakers (page 15).

E AUDIO INPUT/OUTPUT section

AUDIO IN/

White (L)

OUT jacks

Red (R)

AUDI O OUT

Black

jack

F VIDEO/AUDIO INPUT/OUTPUT

section

AUDIO IN/

White (L)

OUT jacks

Red (R)

VIDEO IN/

Yellow

OUT* jacks

Connects to a Super
Audio CD player,
CD recorder, etc.
(page 18).

Connects to a sub
woofer (page 15).

Connects to a VCR,
DVD player, etc.
(page 17–24).

G DMPORT

DMPORT
jack

* You can watch the selected input image when you

connect the MONITOR OUT or HDMI OUT jack
to a TV or projector (page 17).

Connects to a
DIGITAL ME DIA
PORT adapter
(page 77).

Remote commander

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).

wa

w;

ql
qk

DISPLAY

qj

qh

qg

RETURN/EXIT

qf

PRESET –

TUNING –

qd

TV INPUT

TV

DMPORT

SLEEP

AV

VIDEO1 VIDEO2 BD DVD

SAT TV SA-CD/CD TUNER

2CH A.F.D.

MOVIE MUSIC

123
46

5

78

MEMORY

>10

0/10

ENTER

CLEAR

TOOLS/

OPTIONS

O

MENU/HOME

TV CH –

– CATEGORY +

REPLAY ADVANCE

<

.

CATEGORY MODE

HMm

TV

Xx

?/1

?/1

?/1

SYSTEM STANDBY

THEATER

DVD/BD

MENU

AUTO CAL
D.TUNING

9

D.SKIP

AMP MENU

MUTING

TV VOL

MASTER VOL

TV CH +

PRESET +

<

>

TUNING +

FM MODE

1
2

3

4

5

6

7
8

9
q;

qa

qs

Name Function

A TV ?/1

(on/standby)

AV ?/1
(on/standby)

B ?/1

(on/standby)

C Input buttons Press one of the buttons to

Press TV ?/1 and TV (M) at
the same time to turn the TV
on or off.

Press to turn on or off the
Sony audio/video components
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).

Press to turn the receiver on or
off.
To turn off all Sony
components, press ?/1 and
AV ?/1 (A ) at the same time
(SYSTEM STANDBY).

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.

D 2CH Press to select a sound field.

A.F.D.
MOVIE
MUSIC

E THEATER Press to enjoy optimal image

suited for movies and to
output the sound from the
speakers connected to this
receiver automatic ally.

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.

continued

Name Function

F DVD/BD

MENU

AUTO CAL Press to activate the Auto

G D.TUNING Press to enter direct tuning

D.SKIP Press to skip a disc when

H AMP MENU Press to display the menu of

I ENTER Press to enter the value after

Press to display the menu of
the DVD or Blu-ray disc on
the TV screen. Then, use V, v,
B, b and (P) to perform
menu operations.

Calibration function.

mode.

using a multi-disc changer.

the receiver. Then, use V, v,
B, b and (P) to perform
menu operations.

selecting a channel, dis c or
track using the numeric
buttons of the TV, VCR or
satellite tuner.

MEMORY Press to store a station.

J MUTING Press to turn off the sound

K TV VOL

a)

+

MASTER
VOL +

L ./>

REPLAY /
ADVANCE

m/M

/–

a)

/–

b)

<

b)

temporarily.
Press MUTING again to
restore the sound.
Press MUTING and TV (M)
at the same time to activate
the TV’s muting function.

Press TV VOL +/– and TV
(M) at the same time to adjust
the volume level of the T V .

Press to adjust the volume
level of all speakers at the
same time.

Press to skip a track of the CD
player, DVD player or Blu­ray disc player.

Press to replay the previous

<

scene or fast forward the
current scene of the VCR,
DVD player or Blu-ray disc
player.

Press to
– search tracks in the forward/

reverse direction of the
DVD player.

– start fast forward/rewin d of

the VCR, CD player or Blu­ray disc player.

continued

US

9

Getting Started

US

11

US

10

Name Function

a)b)

H

b)

X

b)

x

TV CH +/– Press TV CH +/– and TV (M)

CATEGORY
+/–

PRESET +/– Press to select

Press to start playback of the
VCR, CD player, DVD player,
or Blu-ray disc player.

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.)

Press to stop playback of the
VCR, CD player, DVD play er
or Blu-ray disc player.

at the same time to select
preset TV channels.

Press to select a category for
XM Radio (page 65).

–preset stations.
– prese t channels of the VCR

or satellite tuner.

TUNING +/– Press to scan a station.
CATEGORY

MODE
FM MODE Press to select the FM

M TV Press TV and the button with

N MENU/HOME Press to display the menu of

Press to select the category
mode for XM Radio (page 65).

monaural or stereo reception.

orange printing at the same
time to enable TV operation.

the VCR, DVD player,
satellite tuner or Blu-ray disc
player on the TV screen.
Press MENU/HOME and TV
(M) at the same tim e to
display the TV’s menu.
Then, use V, v, B, b and
(P) to perform menu
operations.

Name Function

O RETURN/

EXIT O

P

V/v/B/b

Q DISPLAY Press to select information

R TOOLS/

OPTIONS

Press 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.

After pressing DVD/BD
MENU (F), AMP MENU
(H), or MENU/HOME (N),
press V,v, B or b to select the
settings. Then, p ress 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.

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 di s p lay
TV’s information on the TV
screen.

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 appl icable
to the Sony TV.

US

12

6

Name Function

S z Press to input the decimal

>10 Press to select track numbers

CLEAR Press to clear a mistake when

T Numeric

buttons
(number 5

U TV INPUT Press TV INPUT and TV (M)

SLEEP Press to activate the Sleep

a)

The number 5, MASTER VOL +, TV VOL +, and
H buttons have tactile dots. Use the tactile dots
as references when operating the receiver.

b)

This button is also available for DIGIT AL MEDIA
PORT adapter operation. For details on the
function of the button, refer to the operating
instructions suppl ied with the DIGITAL MEDIA
PORT adapter.

point for channel numbers of
the Digital CATV terminal.
Press

z and TV (M) at the

same time to input the decimal
point for the channel numbers
of the TV.

over 10 of the CD player.

you press the incorrect
numeric button.

Press to
– preset/tune to preset

a)

)

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.

at the same time to select the
input signal (TV input or
video input).

Timer function and the
duration which the receiver
turns off automatically.

Notes

•Some functions explained in t his 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.

STR-DG720

• AEP, UK model

Getting Started

Getting Started

Description and location of parts

Front panel

132

?/1

SPEAKERS

(OFF/A/B)

AUTO CAL MIC

PHONES

VIDEO 2 IN/PORTABLE AV IN

VIDEO L AUDIO R

TUNING MODE

TUNING

MEMORY/

ENTER

DIMMER

Name Function

A ?/1

(on/standby)

B SPEAKERS

(OFF/A/B)

C TUNING

MODE

Press to turn the receiver on
or off (page 27, 35, 36, 56).

Press to select the front
speaker system (page 28).

Press or turn to operate the
tuner (FM/AM) (page 57).

TUNING +/–

D Display The current status of the

E Remote

sensor

F DISPLAY Press to select information

selected component or a list
of selectable items appears
here (page 7).

Receives signals from remote
commander.

displayed on the display
(page 72).

DISPLAY INPUT MODE

SUR BACK

2CH A.F.D. MOVIE MUSIC

DECODING

SLEEP

qdqfqgqh qjqkql

qs

Name Function

G INPUT MODE Press to select the input mode

H MASTER

VOLUME

I MUTING Press to turn off the sound

J ANALOG

DIRECT

K INPUT

SELECTOR

MASTER VOLUME

INPUT SELECTOR

ANALOG
DIRECT

qa

q;

when the same components
are connected to both digital
and analog jacks (page 68).

Turn to adjust the volume
level of all speakers at the
same time (page 33, 34, 35,

36).

temporarily.
Press MUTING again to
restore the sound (page 34).

Press to listen to high quality
analog sound (page 56).

Turn to select the input
source to play back (page 34,
35, 36, 56, 57, 59, 60, 68, 71,

73).

Getting Started

84567

MUTING

9

Name Function

L 2CH Press to select a sound field

A.F.D.

(page 51).

MOVIE
MUSIC

M SUR BACK

DECODING

N SLEEP Press to activate the Sleep

O DIMMER Press to adjust the brightness

P MEMORY/

ENTER

Q VIDEO 2 IN/

PORTABLE A V
IN jacks

R AUTO CAL

MIC jack

S PHONES jack Connects to headphones

Press to select the surround
back decoding mode (page

43).

Timer function and the
duration which the receiver
turns off automatically (page

72).

of the display (page 50).
Press to store a station or

enter the selection when
selecting the settings (page
27, 59).

Connects to a portable audio/
video component such as a
camcorder or video game
(page 24, 34).

Connects to the supplied
optimizer microphone for the
Auto Calibration function
(page 29).

(page 78).

US

13

continued

About the indicators on the display

GB

5

Getting Started

1 2 3 4 5 6 7 98

SP A

D EX;PLIIx;PL OPT DTS -ES 96/2 4 MEMORY RDS ST

R
SR
SBR

SP B

;

MONOD.RANGECOAXHDMI NEO:6

SW

LC

SL S

SBL

LFE

SB

q;qaqg qdqf qs

Name Function

A SW Lights up when sub woofer

B LFE Lights up when the disc being

C SP A/SP B Lights up according to the

D ; D/

; D EX

selection is set to “YES” (page

47) and the audio signal is
output from the SUB
WOOFER jack.

played back contains an LFE
(Low Frequency Effect)
channel and the LFE channel
signal is actually being
reproduced.

speaker system used. However,
these indicators do not light up
if the speaker output is turned
off or if headphones are
connected.

“; 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

F OPT Lights up when INPUT MODE

“; PL” lights up when the
receiver applies Pro Logic
processing to 2 channel signals
in order to output the center and
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
and surround speakers are set 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.

is set to “AUTO” and the
source signal is a digital signal
being input through the
OPTICAL jack (page 68).

GB

6

continued

GB

7

7

STR-DG720

Name Function

G DTS/

DTS-ES/
DTS 96/24

H MEMORY Lights up when a memory

I Tune r

indicators

J Preset

station
indicators

K D.RANGE Lights up when dynamic range

L NEO:6 Lights up when DTS Neo:6

M COAX Lights up when INPUT MODE

N HDMI Lights up when the receiver

“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).

function, such as Preset
Memory (page 59), etc., is
activated.

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.

Lights up when using the
receiver to tune in radio
stations you have preset. For
details on presetting radio
stations, see page 58.

compression is activated (page

38).

Cinema/Music decoder is
activated (page 52).

is set to “AUTO” and the
source signal is a digital signal
being input through the
COAXIAL jack (page 68).

recognizes a component
connected via an HDMI IN
jack (page 20).

Name Function

O Playback

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

Rear panel

ANTENNA

AM

VIDEO

AUDIO

TV

SAT

OPTICAL
IN jacks

COAXIAL IN
jack

HDMI IN/
OUT* jacks

FM
ANTENNA
jack

AM
ANTENNA
terminals

SAT IN DVD IN BD IN OUT

VIDEO

VIDEO

VIDEO

IN

IN

IN

OUT

MONITOR

AUDIO

AUDIO

AUDIO

IN

IN

IN

OUT

DVD

VIDEO 1

SUB WOOFER

655 47

Connects to a DVD
player, etc. The
COAXIAL jack
provides a better
sound quality (page
22, 23).

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).

Connects to the
supplied FM wire
antenna (aerial)
(page 26).

Connects to the
supplied AM loop
antenna (aerial)
(page 26).

HDMI

SAT IN DVD IN VIDEO 1 IN MONITOR OUT

VIDEO
OUT

COMPONENT VIDEO

AUDIO
OUT

TV

OPTICAL

IN

SAT
IN

OPTICAL

DVD
IN

COAXIAL

(ASSIGNABLE)

DIGITAL

OUT IN IN

DC5V

0.7A MAX

L

DMPORT

R

SA-CD/CD/CD-R

A DIGITAL INPUT/OUTPUT section

B ANTENNA section

3211

Y

B

/

P
C

B

PR/
C

R

SURROUND BACK SURROUND CENTER FRONT B

LLRLRR

SPEAKERS

C COMPONENT VIDEO INPUT/

OUTPUT section

Green
(Y)

Blue

B/CB)

(P
Red

R/CR)

(P

D SPEAKERS section

E AUDIO INPUT/OUTPUT section

White (L)

Red (R)

Black

FRONT A

L

R

Y, PB/CB, PR/CR
IN/OUT* jacks

AUDIO IN/
OUT jacks

AUDIO OUT
jack

Connects to a
DVD player, TV,
satellite tuner, etc.
You can enjoy
high quality image
(page 17–23).

Connects to the
speakers (page 15).

Connects to a Super
Audio CD player,
CD recorder, etc.
(page 18).

Connects to a sub
woofer (page 15).

Getting Started

GB

8

F VIDEO/AUDIO INPUT/OUTPUT

section

White (L)

Red (R)

Yellow

AUDIO IN/
OUT jacks

VIDEO IN/
OUT* jacks

Connects to a VCR,
DVD player, etc.
(page 17–24).

G DMPORT

DMPORT
jack

* You can watch the selected input image when you

connect the MONITOR OUT or HDMI OUT jack
to a TV or projector (page 17).

Connects to a
DIGITAL MEDIA
PORT adapter
(page 70).

Remote commander

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).

wa

w;

ql

qk

qj

qh

qg

TV INPUT

TV

DMPORT

SLEEP

AV

SYSTEM STANDBY

VIDEO1 VIDEO2 BD DVD

SAT TV SA-CD/CD TUNER

2CH A.F.D.

MOVIE MUSIC

123
46

5

78

MEMORY

>10

0/10

ENTER

-

CLEAR

TOOLS/
OPTIONS

DISPLAY

O

RETURN/EXIT

MENU/HOME

TV CH –

REPLAY ADVANCE

PRESET –

<

.

TUNING –

HMm

TV

Xx

?/1
?/1

9

MASTER VOL

<

?/1

THEATRE

DVD/BD

MENU

AUTO CAL
D.TUNING

D.SKIP

AMP MENU

MUTING

TV VOL

TV CH +

PRESET +

>

TUNING +

FM MODE

1

2

3

4

5

6
7

8
9
q;
qa

qs

qd

qf

Name Function

A TV ?/1

(on/standby)

AV ?/1
(on/standby)

B ?/1

(on/standby)

C Input buttons Press one of the buttons to

Press TV ?/1 and TV (O) at
the same time to turn the TV
on or off.

Press to turn on or off the
Sony audio/video components
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).

Press to turn the receiver on or
off.
To turn off all Sony
components, press ?/1 and
AV ?/1 (A) at the same time
(SYSTEM STANDBY).

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 74.

D 2CH Press to select a sound field.

A.F.D.
MOVIE
MUSIC

E THEATRE 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.

continued

Name Function

F DVD/BD

MENU

AUTO CAL Press to activate the Auto

G D.TUNING Press to enter direct tuning

D.SKIP Press to skip a disc when

ENTER Press to enter the value after

H

Press to display the menu of
the DVD or Blu-ray disc on
the TV screen. Then, use V, v,
B, b and (Q) to perform
menu operations.

Calibration function.

mode.

using a multi-disc changer.

selecting a channel, disc or
track using the numeric
buttons of the TV, VCR or
satellite tuner.

MEMORY Press to store a station.

I AMP MENU Press to display the menu of

J TOOLS/

OPTIONS

K MUTING Press to turn off the sound

L TV VOL

a)

+

MASTER
VOL +

/–

a)

/–

the receiver. Then, use V, v,
B, b and (Q) to perform

menu operations.
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.

temporarily.
Press MUTING again to
restore the sound.
Press MUTING and TV (O)
at the same time to activate
the TV’s muting function.

Press TV VOL +/– and TV
(O) at the same time to adjust
the volume level of the TV.

Press to adjust the volume
level of all speakers at the
same time.

GB

9

Getting Started

GB

10

continued

GB

11

8

STR-DG720

Name Function

M MENU/HOME Press to display the menu of

N ./>

REPLAY /
ADVANCE

m/M

H

b)

X

b)

x

TV CH +/– Press TV CH +/– and TV (O)

PRESET +/– Press to select

TUNING +/– Press to scan a station.
FM MODE Pre ss to select the FM

b)

<

<

b)

a)b)

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, b and
(Q) to perform menu
operations.

Press to skip a track of the CD
player, DVD player or Blu-ray
disc player.

Press to replay the previous
scene or fast forward the
current scene of the VCR,
DVD player or Blu-ray disc
player.

Press to
– search tracks in the forward/

reverse direction of the DVD
player.

– start fast forward/rewind of

the VCR, CD player or Blu­ray disc player.

Press to start playback of the
VCR, CD player, DVD player
or Blu-ray disc player.

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.)

Press to stop playback of the
VCR, CD player, DVD player
or Blu-ray disc player.

at the same time to select
preset TV channels.

– preset stations.
– preset channels of the VCR

or satellite tuner.

monaural or stereo reception.

Name Function

O TV Press TV and the button with

P RETURN/

EXIT O

Q



V/v/B/b

R DISPLAY Press to select information

S -/-- Press to select the channel

>10 Press to select the track

CLEAR Press to clear a mistake when

orange printing at the same
time to enable TV operation.

Press to
– return to the previous menu.
– exit the menu while the

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.

After pressing DVD/BD

,

MENU (F), AMP MENU
(I), or MENU/HOME (M),
press V,v, B or b to 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 Blu­ray disc player.

displayed on the TV screen of
the VCR, satellite tuner, CD
player, DVD player or Blu­ray disc player.
Press DISPLAY and TV ( O)
at the same time to display
TV’s information on the TV
screen.

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.

numbers over 10 of the CD
player.

you press the incorrect
numeric button.

menu or on-screen guide of
the VCR, DVD player,
satellite tuner or Blu-ray
disc player is displayed on
the TV screen.

Name Function

T Numeric

buttons
(number 5

U TV INPUT Press TV INPUT and TV (O)

SLEEP Press to activate the Sleep

a)

The number 5, TV VOL +, MASTER VOL + and
H buttons have tactile dots. Use the tactile dots 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.

Press to
– preset/tune to preset

a)

)

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.

at the same time to select the
input signal (TV input or
video input).

Timer function and the
duration which the receiver
turns off automatically.

Getting Started

GB

13

GB

12

9

STR-DG720

SECTION 2

DISASSEMBLY

Note: This set can be disassemble according to the following sequence.

SET

2-1. CASE
(Page 10)

2-2. BACK PANEL SECTION
(Page 11)

2-3. FRONT PANEL SECTION
(Page 11)

Note: Follow the disassembly procedure in the numerical order given.

2-4. DIGITAL BOARD
(Page 12)

2-5. MAIN BOARD SECTION
(Page 12)

2-1. CASE

 two screws
(+BVST 4 × 8) (black)
two screws
(+BVTT 4 × 8) (silver)

2-6. STANDBY BOARD
(Page 13)

 two screws
(+BVTP 3 × 8)

10

 case

 two screws

(+BVST 4 × 8) (black)
two screws
(+BVTT 4 × 8) (silver)

2-2. BACK PANEL SECTION

STR-DG720

RM back panel section

 four screws

(+BVTP 3 × 8)

 screw
(+BVTP 3 × 8)

 wire (flat type) (17 core)
(CN3511)

 CN3509 (5P)

 CNP901 (2P)

RI CN103 (3P)

RK CNP240 (3P)

RH CNP203 (4P)

2-3. FRONT PANEL SECTION

RG

 CN102 (5P)

 wire (flat type) (7 core)

(CNS509)

 wire (flat type) (9 core)
(CNS508) (US, CND)
wire (flat type) (11 core)
(CNS507) (AEP, UK)

 wire (flat type) (7 core)
(CNS503) (US, CND)

 four screws
(+BVTP 3 × 8)

RB three screws
(+BVTP 3 × 8)

RT four screws
(+BVTP 3 × 8)

RE two screws
(+BVTP 3 × 8)

RL CNP242 (3P)

 CNP790 (4P)

 five screws

(+BVTP 3 × 8)

 CNP910 (3P)

 CNP500 (3P)

 CNP430 (3P)

 wire (flat type) (17 core)

(CNS506)

 front panel section

11

STR-DG720

2-4. DIGITAL BOARD

 CNP512 (3P)

 CNP503 (7P)

 CNP505 (8P)

 DIGITAL board

 screw

(+BVTP 3 × 8)

2-5. MAIN BOARD SECTION

 two screws
(+BV3 (3-CR))

 CNP912 (6P)

CNP411

CNP410

 CNP940 (6P)

 screw

(+BV3 (3-CR))

 CNP921 (3P)

 two screws

(+BV3 (3-CR))

12

 MAIN board section

2-6. STANDBY BOARD

STR-DG720

 STANDBY board

 screw

(+BVTP 3 × 8)

 CNP901 (3P)

CN4001

13

STR-DG720

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
[

] button to turn off the main power.

?/1

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 mo­ment and select the desired step.

VACUUM FLUORESCENT DISPLAY TEST MODE

* All fl uorescent 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 [

] button to turn on the

?/1

main power.

1. ALL segments light on.

SPA

D

SW

LFE

L

CR

SL S SR

SBL SB SBR

DDD

DEX DTS-ESxIIPL RDS STCAT96/24

SP B

D

HDMI

D

PL OPT

MEMORY

NEO:6COAX

SAT

D.RANGE

dB

Hzk

ft.m

MHz

MONO

KEY CHECK MODE

* Button check
* Procedure:

While depressing the [SPEAKERS (OFF/A/B)] and the [2CH]
buttons simultaneously, press the [

] button to turn on the

?/1

main power.
Either the message “REST 14” appears.

]

Every pressing of any button other than the [

?/1

the buttons. The buttons which are already counted once are not
counted again. When all buttons are pressed “REST 00” ap­pears.

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] but­tons, press the [

] button to turn on the main power.

?/1

2. The message “DSP TEST” appears.

3. Press the [AMP MENU] 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

[]ALL”.

“SWP.

] counts down

2. Turn the [INPUT SELECTOR] control, confi rm display.

LFE

L R

S

EX -ESx RDS

SP B

HDMI

NEO:6COAX

MONO

D.RANGE

SAT

k
m

MHz

3. Turn the [INPUT SELECTOR] control, confi rm display.

SW

C

SL SR

SBL SB SBR

D

D

D DTS STCAT

D

D

PL

MEMORY

dB

Hz

ft.

4. Turn the [INPUT SELECTOR] control, all segments light off.

SOUND FIELD CLEAR MODE

* The preset sound fi eld is cleared when this mode is activated.

Use this mode before returning the product to clients upon com­pletion of repair.

* Procedure:

While depressing the [2CH] button, press the [

] button to turn

?/1

on the main power.
The message “S.F . CLR.” appears for a moment and initialization
is performed.

SHIPMENT MODE

* All preset contents are reset to the default setting.
* Procedure:

1. While depressing the [SPEAKERS (OFF/A/B)] and the [MU­SIC] buttons simultaneously, press the power [

] button to

?/1

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.

SOFTWARE VERSION DISPLAY MODE

* The software version is displayed.
* Procedure:

While depressing the [SPEAKERS (OFF/A/B)] and the [DIS­PLAY] buttons simultaneously, press the [

] button to turn on

?/1

the main power.
The model name, destination and the software version are dis­played for a moment.

14

STR-DG720

SECTION 4

FM TUNER CHECK

DCAC FACTORY TEST MODE

DCAC Factory Test mode have two stages:

1. DCAC DSP Data Line Checking

2. DCAC board Checking

Start Pass Pass

DSP Data Line

Check

Factory Test System Setup

Receiver

DCAC MIC

SPK Front Left

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:

Auto Cal Mic

Check

END

FM AUTO STOP CHECK

generator

set

OUT (75 Ω)

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. Confi rm that input Frequency of A, B and C are detected and
automatic scanning stops.

The stop of automatic scanning means “The station signal is re­ceived in good condition.”

[]SD0x” x=1 t D1501 or R1530 problem

“ERR
x=2 t D1502 problem
x=3 t D1503 problem
x=4 t D1504 problem

2. DCAC board Checking

Connect front left speaker of the receiver and AUTO CAL micro­phone. 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)

15

STR-DG720

• Circuit Boards Location

SECTION 5

DIAGRAMS

POWER board

DCAC board

HEADPHONE board

STANDBY board

VIDEO 2 board

DCDC CONVERTER board

HDMI RE board

XM board
(US, Canadian
model only)

VIDEO board

DIGITAL board

MAIN board

DISPLAY board

16

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

ELECTRICAL VOLUME

IC400

VCCVEE

+7V

SEL
SW

MCU

I/F

–7V

SW OUT

C OUT
SL OUT
FL OUT

• 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 A V IN

TV

AM

DMPORT AMP

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

0.7A MAX

-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

SBL OUT

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

R2 AC

R2 AC

F4002

DIGITAL

SECTION

B

DIGITAL

SECTION

A

POWER

SECTION

F

VIDEO

SECTION

C

XM

SECTION

D

POWER

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)

STR-DG720

STR-DG720

1818

DPSOA
DPSOD
DPSOC
DPSOB

DOUT

9

2
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

SCKI6BCK8LRCK

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

DIGITAL AUDIO

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

CLKCEDI

DO

CKSEL1

38

48

DIR XMODE

39 29

DIRCKST

XMODE

XSTATE

5

XOUT

DIN2

1

SAT

IN

(OPTICAL)

OUT

OPTICAL

RECEIVER

IC1351

3

DIN0

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

FL OUT

R-CH

VO3L

VO3R

VO1L

VO1R

VO2L

VO2R

9

5

26

25

7

AMP

IC1406

7

8

10

2

MCK

3

BCK
LRCK

US,CND MODEL

4

DPDVBCK

87

8CH DAC

IC1452

DAC

DIN1

SL OUT

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

SBL OUT

519

7

20

AMP

IC1403

DAC

13

VINL

FR-IN

14

VINR

D1504

D1503

D1502

SELECTOR

IC1302

75

IC1

3

14 2

IC3

4

IC2

1Y

ERROR

DETECT

IC1017

51

A

2

6

B

A/B

Y

IC1016

1

8

AB

4

5
6

SPLRCK

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)

STR-DG720

STR-DG720

1919

1

CH1 IN1

CH2 IN2

CH2 IN1

CH3 IN2

CH3 IN1

CH1 IN2

CH2 IN3

CH3 IN3

CH1 OUT

CH2 OUT

CH3 OUT

2 4

Y

P

B/CB

PR/CR

Y

SW1 SW2

COMPONENT
SW1

COMPOSITE
SW4

COMPOSITE
SW3

COMPOSITE
SW2

COMPOSITE
SW1

COMPONENT
SW2

P

B/CB

PR/CR

Y

P

B/CB

PR/CR

J221

J220 (1/2)

J210 (1/2)

24

75Ω

DRIVER

6dB AMP

22

75Ω

DRIVER

6dB AMP

20

75Ω

DRIVER

6dB AMP

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

P

R/CR

PB/CB

J220 (2/2)

MONITOR

OUT

COMPONENT

VIDEO

–7

1

75Ω

DRIVER

6dB AMP

15

3 1

75Ω

DRIVER

6dB AMP

-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 A V IN

VIN2

7

VIN3

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

3

CH1 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)

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 DATA SELECT

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

DATA BUFFER

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

1

3

5

SDA

13

6

SCL

CN3503

BD IN

HDMI DVD IN

HDMI

CN3504

OUT

CN3510

2

RESET
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

DATA BUFFER

IC3507

3

SDAA6SDAB

2

SCLA SCLB

7

WP

5

LRCK
BCK
MCK

5-4. BLOCK DIAGRAM – HDMI RE Section –

(Page 18)

STR-DG720

STR-DG720

2121

5-5. BLOCK DIAGRAM – XM Section (US, Canadian model) –

(Page 22)

(Page 18)

(Page 17)

18 COMRXP

23 COMTXP

J101

XM DIGITAL

TRANSCEIVER

IC102

X101

45.158MHz

XM

+D
–D

3
2

22 COMTXM

1

39

I2SSCLK

5

SCRXIN

3

SCTXOUT

2

37

I2SDATA

3

41

I2SLRCLK

16

43

I2SOCLK

11

RESET

26 OSCOUT

28 OSCIN

13

MD

14

MC

XM DACMDI
XM DACMC

BCK
DATA
LRCK

SCK

15

ML

7

VOUTL

XMDACMS

XML
XMR

XM RESET

XM DBPOWER

+6.5V

19 COMRXM

6 7

8

VOUTR

XM+3.3V

XM+5V

2 1

XMDBUS+5V

3 1

3 1

D/A CONVERTER

IC105

XM AMP

IC104

IC107

XM+5V

REG

IC101

XM+3.3V

REG

POWER CONTROL

SWITCH

Q105,106

TUNER/AUDIO

SECTION

D

DIGITAL

SECTION

H

XM MIXMO
XM MOXMI

KEY/DISPLAY

SECTION

J

4 2

IC106

XM+5V

REG

STR-DG720

STR-DG720

2222

5-6. BLOCK DIAGRAM – KEY/DISPLAY Section –

(Page 21)

57

FL DISPLAY DRIVER

IC100

14

I

29

•

31

58

98

78

5

6

80
79

84

SW NETWORK

S101-108

RV102

MASTER
VOLUME

85

55

+3.3V

(STBY)

X1

X0

EEPROM DATA

115

DCAC IN

EEPROM CLK

POWER_KEY

INIT

62

RESET TRG

SDA

SCL

EEPROM

IC1131

X1101

12.5MHz

SIRCS IN

F1
F2

71

FL_DATA

7

DIN

69

FL_LAT

XM MOXMI
XM MIXMO

9

STB

70

FL_CLK

8

CLK

GRID1

I

GRID11

SEG1

I

SEG17

VOL_JOG(2A)
VOL_JOG(2B)

INPUT ENCODER A

INPUT ENCODER B

AD KEY2

SW NETWORK

S109–113,115

AD KEY1

2
3

89
90

RV101
INPUT

SELECTOR

2
3

TUNING A
TUNING B

5
6

RV103

TUNING +/–

2

REMOTE

CONTROL

SIGNAL

RECEIVER

IC103

OUT

SIRCS

SYSTEM

CONTROL

IC1010 (5/6)

BUFFER

IC101

S100

4

2

1

113

114

FL101

VACUUM

FLUORESCENT

DISPLAY

RESET
IC1006

1

RESET
IC1005

42

I

32

9

4

2

8

6

3

93

XM MOXMI

US,CND MODEL

92

XM MIXMO

15

MIC AMP

IC2000

AUTO CAL MIC

J2000

XM

SECTION

J

IN A

IN B

1A 3Y

OUT Y

2

2

VOLTAGE

DET STOP

IC1007

1

• Abbreviation
CND : Canadian model

@

STR-DG720

STR-DG720

2323

6

2
3

DRIVE

POWER AMP

Q701–704

CURRENT

DETECT

Q711,712

RY350

PRE DRIVER

IC700

IN 1

+VOUT1
–VOUT1

R

L

R

L

AUDIO

OUT

SUB

WOOFER

CENTER

SURROUND

BACK

SURROUND

R–CH

R–CH

R

L

R–CH

R–CH

R–CH R–CH

FL–CH

FR–CH

SL–CH

C–CH

R–CH

SR–CH R–CH

SBR–CH R–CH

(IC500)

TUNER/

AUDIO

SECTION

E

TUNER/

AUDIO

SECTION

F

RY901

D1001

+6.3V

+4.1V

F1
F2

-20V

+3.3V

(STBY)

+5V

–7V

+7V

TU+9V

–20V

RECT

D950–953

D991 D990

D1107

D1109

D1108

OVERLOAD

DETECT

D720,Q720

8

68

12
11

DRIVE

POWER AMP

Q651–654

CURRENT

DETECT

Q661,662

–20V REG

Q930

B–SWITCH

Q500,501

RELAY

DRIVER

Q901

SUB TRANSFORMER

DRIVE

Q951,955

AC IN

DETECT

Q990

PRE DRIVER

IC600

IN 2

+VOUT2
–VOUT2

OVERLOAD

DETECT

D670,Q670

6

2
3

DRIVE

POWER AMP

Q801–804

CURRENT

DETECT

Q811,812

PRE DRIVER

IC800

IN 1

+VOUT1
–VOUT1

OVERLOAD

DETECT

D820,Q820

RY355

RY301

PROTECTOR

D320,325–327

Q320,321,323–325

9

83

17

D1112

D1110

D1111

D955

D930

OVERLOAD

DETECT AMP

72

IC565

–55V

–B

+A5V

+5V

REG

13

IC1001

+3.3V

+3.3V

REG

24

IC1013

+1.2V

+1.2V

REG

31

IC1002

+3.3V

REG

13

IC1904

+9V

REG

13

IC1902

–15V

+15V

+7V

REG

13

IC350

–7V

REG

23

IC352

+5V

REG

13

IC1031

+B

R–CH

R–CH

R–CH

R–CH R–CH

R–CH R–CH

RECT

D921

RECT

D910–913

RECT

D940–943

T901

POWER

TRANSFORMER

(MAIN)

TB606 (1/2)

TB601

TB602 (2/2)

J405

FRONT A

FRONT B

RY375

PHONES

J790

R–CH

FRONT A RY

HP RY

C/SUR/SBL RY

FRONT B RY

SW_PREOUT_RY

SBR RY

HP DETECT

FRONT A RY

PROTECTOR

HP DETECT

STOP

HP_RY

13

FRONT B/ST SW RY

15

POWER_RY

25

FUSE_DETECT

97

SUB T

16

SW_RY

14

C/CUR/SB

FRONT A RY

20

SBR RY

SBR RY

HP DETECT

HP RY

FRONT B RY

12

SW_PREOUT_RY

C/SUR/SBL RY

SYSTEM

CONTROL

IC1010 (6/6)

PRE

DRIVE

PRE

DRIVE

SW–CH

–55V +B

SBL–CH

6

2
3

DRIVE

POWER AMP

Q601–604

CURRENT

DETECT

Q611,612

IN 1

+VOUT1
–VOUT1

OVERLOAD

DETECT

D620,Q620

PRE

DRIVE

–55V +B

–55V +B

PRE

DRIVE

R910

R2 AC

DIGITAL

SECTION

I

PROTECTOR

R2 AC

R911

R940

T904

POWER

TRANSFORMER

(SUB)

AC IN

~

F901

SPEAKERS

IMPEDANCE

USE 8–16Ω

RELAY

DRIVER

Q355

RY360

RELAY

DRIVER

Q360

RY370

RELAY

DRIVER

Q370

RELAY

DRIVER

Q301

RELAY

DRIVER

Q350

RY365

TB602 (1/2)

RELAY

DRIVER

Q365

RELAY

DRIVER

Q375

R

L

TB606 (2/2)

• Signal path
: TUNER (FM/AM)

• R-ch is omitted due to
same as L-ch.

5-7. BLOCK DIAGRAM – POWER Section –

(Page 17)

(Page 17)

(Page 18)

STR-DG720

STR-DG720

2424

– HDMI RE Board –

For Schematic Diagrams.

Note:

• All capacitors are in μF unless otherwise noted. (p: pF)
50 WV or less are not indicated except for electrolytics

and tantalums.

• All resistors are in Ω and 1/4 W or less unless otherwise
specifi ed.

• f : internal component.

•

2

: nonfl ammable resistor.

•

5

: fusible resistor.

• C : panel designation.

THIS NOTE IS COMMON FOR PRINTED WIRING BOARDS AND SCHEMATIC DIAGRAMS.
(In addition to this, the necessary note is printed in each block.)

• A : B+ Line.

• B : B– Line.

• Voltages and waveforms are dc with respect to ground
under no-signal (detuned) conditions.
no mark

: FM

• Voltages are taken with VOM (Input impedance 10 MΩ).

Voltage variations may be noted due to normal production

tolerances.

• Waveforms are taken with a oscilloscope.

Voltage variations may be noted due to normal production

tolerances.

• Circled numbers refer to waveforms.

• Signal path.

F : TUNER (FM/AM)
L : VIDEO (AUDIO)
I : VIDEO
J : DVD (DIGITAL)
c : CD (ANALOG)

• Abbreviation

CND : Canadian model

For Printed Wiring Boards.

Note:

• X : Parts extracted from the component side.

• f : internal component.

•

: Pattern from the side which enables seeing.

Caution:

Parts face side:
(SIDE A)
Pattern face side:
(SIDE B)

Parts on the parts face side seen from
the parts face are indicated.
Parts on the pattern face side seen from
the pattern face are indicated.

Note:

The components identi­fi ed by mark 0 or dotted
line with mark 0 are criti­cal for safety.
Replace only with part
number specifi ed.

Note:

Les composants identifi és
par une marque 0 sont
critiques pour la sécurité.
Ne les remplacer que par
une piéce portant le nu­méro spécifi é.

• Abbreviation
CND : Canadian model

– XM Board (US, Canadian model) –

3.4 Vp-p

3 Vp-p

1.2 Vp-p

3.4 Vp-p

25 MHz

12.288 MHz

3.07 MHz

12.288 MHz

3.1 Vp-p

12.5 MHz

 IC1301 RG (BCK)

 IC1301 RE (CKOUT)

 IC1301 XB (XOUT)

1 V/DIV, 0.2 μsec/DIV

1 V/DIV, 50 nsec/DIV

1 V/DIV, 50 nsec/DIV

 IC1009 [WD (XTAL)

 IC1010 UK (X1)

1 V/DIV, 20 nsec/DIV

1 V/DIV, 50 nsec/DIV

• Waveforms
– DIGITAL Board –

 IC3511 JG (XTALOUT)

28.322 MHz

1 V/DIV, 20 nsec/DIV

 IC3519 RB (XOUT)

10 MHz

1 V/DIV, 50 nsec/DIV

2.5 Vp-p

3.4 Vp-p

 IC102 XI (OSCOUT)

45.158 MHz

0.05 V/DIV, 0.2 μsec/DIV

1.6 Vp-p

STR-DG720

STR-DG720

2525

1

A

B

C

D

E

F

G

H

2 3 4 5 6 7 8 9 10 11 12 13 14

8

14

5

8145

MAIN BOARD

OUT

-1
L

-2
R

-3
L

-4
R

-5
L

-6
R

-1
L

-2
R

-3
L

-4
R

-1
L

-2
R

-3
L

-4
R

IN IN

TV

SURROUND BACK SURROUND

R

SA-CD/CD/CD-R

AUDIO

IN

SAT

AUDIO

IN

DVD

AUDIO

OUT

AUDIO

IN

AUDIO

OUT

SUB WOOFER

L

RL

VIDEO 1

CENTER

FRONT B

R

L

L

R

FRONT A

SPEAKERS

IMPEDANCE USE 8-16Ω

(12)

12

(11)

11

(CHASSIS)

J790

PHONES

BLK

1-875-699-

1-875-588-

C3037

C3032

R3022

IC3002

C3025

C3022

C3034

JS3022

JS3037

CNP411

JS432

JR321

JW826

JR702

JW827

JW833

JW830

JW845

C487

C489

C499

JW773

JWH1

C488

IC400

C556

C551

R551

R552

C554

JW829

JW748

R572

R570

C570

C571

Q570

CL005

B400

JS561
JS562

CL006

R556

JS563

Q551

JS564

R562

C561

Q561

R656

R658

JS565

R565

R564

R563

Q562

R557

R558

Q552

BCE

Q652

BCE

BCE

BCE

Q752

BCE

Q602

BCE

Q702

BCE

Q852

BCE

Q802

BCE

JW610

JW611

R708

R706

R707

JW627

C811

Q811

R813

R814

Q812

R815

R820

L828

RY375

CNP912

1

7

CNP912

1

7

R375

Q375

R376

JW686

C922

C923

JW685

JWH12

CN792

CNP790

ET902

BLU

GRY

D941

CN941

D940

C940

C941

GRN
YEL
RED
GRY

BLU

C904

D942

D943

C930

CNP940

D930

1

6

R930

CNP930

JW859

CL004

CL003

CL008

W001

VIO

CL007

R351

D350

RY350

JW657

RR15

CC15

RR16

JW327

TB606

TB602

RY365

R353

R368

JWH11

R357

Q360

D370

R373

RY370

Q370

R371

R355

RY355

Q355

RY360

D360

C844

R506

D501

D500

JW781

R507

IC565

R546

Q500

R505

R502

AEP,UK
MODEL

US,CND
MODEL

E C B

R545

JW688

JW872

JW709

C803

JSH551

JW655

JWH2

JW330

JWH9

C325

JW648

R328

Q720

R722

D711

C611

JW676

C708

JW612

JW613

R716

L628

JS601

JWH4

JW691

JW642

JW692

R720

JW660

JW661

R715

Q712

R713

R714

Q711

JW608

JW609

JW694

R724

JWH7

C721

R723

JW656

C323

C320

JW658

JW753

IC800

JW743

JW761

JW754

JW762

C805

R804

C852

JS810

C802

C804

R801

JW760

R854

C855

C853

RR17

JS395

JS555

RR18

RR19

CC19

JS554

R302

CC18

CC17

Q365

D365

R366

Q350

C932

D931

CC12

RR12

JW323

JW321

JW322

JS922

JS920

JW643

CC14

RR13

CC13

RR14

JS397

JW750

CNP921

C931

JS930

Q930

R823
R824

C821

Q820

R829

R830

R822

JW626

R807

JW600

R808

R806

JW604

JW605

R860

JW710

JW603

JW607

R857

R856

R858

JW606

C859

C861

Q861

R864

R863

Q862

R866

R865

Q870

JW675

R870

L878

R880

R879

JWH3

R872

C711

C871

R878

R816

JW602

JW866

JW631

R861

R862

R809

C808

C807

Q801

D811

R810

C809

R811

R812

C879

JW629

D870

R828

D820

C829

D375

R377

R821

C820

JW646

JW645

JW653

R392

R393

R932

C921

C933

R931

R940

JW332

JW331

JS394

CC11

JW328

C920

JW641

JW324

JWH5

R352

R350

R367

JW868

JW779

R365

JW782

JW783

JW790

JW789

JS603

R363

JW799

R360

R361

R372

JS552

R370

JW800

R467

JS472

R303

JS553

R362

JW791

D355

R358

R356

JW798

JS551

JW771

C856

C851

C801

R802

R852

R853

R851

C854

C806

JW767

R504

C500

JW766

R805

R503

R803

JS602

JW785

JW777

JW776

CC16

JW652

JW651

JW637

JW638

JW640

JW639

JW690

JW687

JW840

R510

R501

R511

Q501

JS510

JW659

JW770

JW689

JW679

R729

R728

L728

C729

D720

R709

R610

R612

R611

C609

C707

R721

C720

C709

R710

Q701

JW772

JW693

R730

JW867

JW632

R873

R874

D861

R871

C870

JW633

JW634

JW630

JW647

JW650

JW699

JW326

D921

JS392

JS393

JS390

JS391

RR11

JW325

JS398

JW329

C900

JW644

R378

Q851

C857

C858

R859

R712

R711

Q804

BCE

Q803

BCE

Q854

BCE

Q853

BCE

Q703

BCE

Q603

BCE

Q754

BCE

Q753

BCE

Q654

BCE

Q653

BCE

Q554

BCE

Q553

BCE

Q604

BCE

Q704

BCE

C553

C555

C544

C671

JS558

JS557

JS511

IC500

R554

R430

C430

C431 R431

JR434

CL002

JWH10

JW863

JW862

JS470

JS460

JS410

R402

CC52

CC02

C409

R409

R452

VIO

JS471

R404

C403

CC54

R408

C408

R458

C458

C350

C471

CC04

JW855

C405

AEP,UK
MODEL

J403

J401

CC58

CC05

R470

R304

Q301

RY301

D301

R301

JS350

CN350

CN500

IC350

D352

C353

C703

R704

C705

C755

R753

R603

R605

R752

C754

R751

JR632

C606

C702

R703

C704

R705

R754

C545

LP400

JW705

R630

C629

JW704

L778

R629

R622

C621

R616

Q620

Q321

Q320

Q325

R323

D320

JW677

JW614

JW636

JW635

C644

JS611

R654

C655

R604

C605

JS712

IC700

JW870

JW746
JW745
JS610

JSH550

JW618

R757

JW621

R756

R758

JW620

JW667

JS566

JW672

C657

JW671

JW622

R657

JS568

D661

C661

Q661

R663

R664

R665

Q662

JW681

L678

R666

R674

R680

Q670

D670

JW664

R765

Q762

R763

R764

Q761

C761

JW665

C608

BCE

BCE

BCE

BCE

BCE

BCE

JW616
JW619

JS608

Q601

R615

Q612 R613

Q611

R614

R620

C607

JS612

JW615

JW617

R607

R606

C757

C758

JW623

IC600

C602

C654

C351

CL001

IC352

C400

J405

J404

JR406

JW801

JW864

CN434

CNP500

US,CND MODEL

R488

R487

JW838

JR435

JW834

AEP,UK MODEL

JW819

JS459

JS409

JS401

JW807

R3013

JS3002

JS3001

CNP430

JW871

JW832

JW846

JW841

JS411

JS400

CC59

CC09

JW861

CC51

CC01

R451

R401

W002

JS461

JS458

JS408

R453

R403

CC55

CC08

R455

R405

R466

R454

JW843

JW852

JW837

JW836

JS473

JW804

C352

JW803

C651

C601

C656

JW768

R653

R651

R652

C652

R602

C604

JW835

C744

C546

R327

D326

JS600

JS604

JS605

D327

D325

R326

JW696

JW695

JW756

JW755

C753

JW769

JW747

C603

JW741

JW739

JW738

JW716

JW718

R673

JW717

R670

R672

R671

C670

JW740

JW714

R662

R759

Q651

R660

C659

R661

R678

C679

R760

Q751

R761

C759

R762

R609

R679

JW713

JW712

JW749

JS711

C752

R701

R601

R702

C706

C701

C751

C756

JW839

JS609

JW707

R771

C770

D770

R772

R773
JW684

JW708

R774

Q770

R770

C771

D761

R766

R779

R778

C779

R780

JS606

Q324

Q323

R320

R325

D611

R608

D620

R621

C620

R628

JS607

JW715

JW706

R624

R623

JW700

JW751

JS710

JW758

JW794

JW795

JW802

CC53

CC03

JW842

JW831

JS573

JW752

R553

C552

JW817

CNP410

JW737

JS556

C653

R555

JW825

R450

R449

JW731

C449

C450

JW601

JS569

JS570

JS572

R579

R578

L578

C579

R659

C658

JW670

JS567

D570

JS550

JW721

JW720

JS571

R574

R573

B C E

B C E

B C E

B C E

E C B

B C E

R571

R580

D561

R566

C557

R559

R561

R560

C558

C559

JS559

JS560

JW814

JR322

JW816

JW860

JW815

R3011

R459

R3010

C3024

JW813

R3012
C3027

C459

C3026

R3023

R3020

R3021

TB601

1

3

1

5

1

5

1

CNP921

51

3

CNP930

1

3

4

1

31

123

321

16

15

14

1

2

1

2

15

14

15 1

14 2

15

1

14

2

1

4

1

CN500

CNP500

4

1

13

8

CN350

18

15

1

13

1

1

1

80

60

61 20

21

40

41

4

B C E

B C E

B C E

B C E

B C E

B C E

B C E

B C E

B C E

B C E

B C E

B C E

E C B

B C E

B C E

B C E

B C E

B C E

B C E

B C E

E C B

E C B

E C B

E C B

E C B

E C B

E C B

B C E

A

DIGITAL

BOARD

CNS501

B

DIGITAL

BOARD

CNS502

K

T901

POWER

TRANSFORMER

(MAIN)

GRY

GRY
GRY
GRY
BLU

J

STANDBY

BOARD

CN912

GRY
GRY

RED

E

H

VIDEO
BOARD
CNP203

DCAC
BOARD
CN2000

BLK

GRY

GRY

GRY

BLK

GRY

GRY

RED

GRY

GRY

C

DIGITAL

BOARD
CNP503

RED

BLU

BLK

YEL

ORG

L

T901

POWER

TRANSFORMER

(MAIN)

RED
GRY
GRY

GRY
GRY

BLU

GRY

GRY

GRY

BLU

GRY

I

DISPLAY

BOARD

CN108

D

DIGITAL
BOARD
CNP505

AEP,UK

MODEL

AEP,UK

MODEL

AEP,UK

MODEL

AEP,UK

MODEL

AEP,UK

MODEL

AEP,UK
MODEL

AEP,UK
MODEL

AEP,UK
MODEL

AEP,UK
MODEL

AEP,UK MODEL

CN434

61

G

XM

BOARD

CN102

(US,CND)

GRY

GRY

GRY

GRY

BLU

US,CND MODEL

1

4

CNP790

TP790

BT700

JW700

JW701

CL071

CL072

CL073

CL074

C791

CNP430

WHT

BLK
RED

F

VIDEO 2

BOARD

CNP201

1

4

5-8. PRINTED WIRING BOARDS – MAIN Section –

• : Uses unleaded solder.

• See page 16 for Circuit Boards Location.

Q812 G-12
Q820 F-11
Q851 G-10
Q852 G-10
Q853 G-10
Q854 G-11
Q861 G-11
Q862 G-10
Q870 G-10
Q930 D-12

Q753 G-5
Q754 G-6
Q761 G-6
Q762 G-6
Q770 F-6
Q801 G-12
Q802 G-12
Q803 G-11
Q804 G-12
Q811 G-12

Q670 F-4
Q701 G-9
Q702 G-9
Q703 G-8
Q704 G-9
Q711 G-9
Q712 G-9
Q720 F-8
Q751 G-6
Q752 G-6

D301 C-6
D320 F-7
D325 F-8
D326 F-7
D327 F-8
D350 D-10
D352 D-6
D355 C-9
D360 D-8
D365 D-10

D370 C-7
D375 F-12
D500 E-9
D501 D-8
D561 F-2
D570 F-3
D611 F-7
D620 F-7
D661 F-4
D670 F-4

D711 F-8
D720 F-9
D761 F-5
D770 F-6
D811 G-11
D820 F-12
D861 G-10
D870 F-10
D921 C-12
D930 D-13

D931 D-12
D940 E-13
D941 E-13
D942 D-12
D943 D-13

IC350 C-6
IC352 C-6
IC400 D-3
IC500 E-3

IC565 D-8
IC600 E-4
IC700 D-6
IC800 D-7
IC3002 B-2

Q301 C-6
Q320 F-7
Q321 F-7
Q323 F-7

Q324 F-7
Q325 F-8
Q350 D-10
Q355 C-9
Q360 C-8
Q365 D-10
Q370 C-7
Q375 F-12
Q500 E-9
Q501 D-9

Q551 G-2
Q552 G-2
Q553 G-2
Q554 G-3
Q561 G-3
Q562 G-3
Q570 F-2
Q601 G-7
Q602 G-7
Q603 G-7

Q604 G-8
Q611 G-7
Q612 G-7
Q620 F-7
Q651 G-4
Q652 G-4
Q653 G-4
Q654 G-4
Q661 G-5
Q662 G-4

Ref. No. Location

• Semiconductor Location

Ref. No. Location Ref. No. Location Ref. No. Location Ref. No. Location Ref. No. Location Ref. No. Location Ref. No. Location Ref. No. Location Ref. No. Location Ref. No. Location

(Page 30)

(Page 30)

(Page 34)

(Page 40)

(Page 42)

(Page 34)

(Page 30)

(Page 45)

(Page 45)

(Page 45)

(Page 30)

(Page 43)

STR-DG720

STR-DG720

2626

4

J

A

C

9

G

I

36

D

E

F

875 10

B

112

K

H

1

A

DIGITAL
BOARD

CNS501

(3/3)

B

CNS502

(3/3)

BOARD

DIGITAL

MAIN

BOARD

(2/3)

1

MAIN

(2/3)

2

BOARD

MAIN BOARD (3/3)

3

CNP201

F

VIDEO 2
BOARD

BOARD

G

CN102

XM

IC B/D

6.9

0

0

0

0

0

0

-6.9

0
0

0
0

0
0

0
0

0
0
0
0

0

0

0

0

000

0

0

0

0

0

0

0

0

0

-6.9

0

0

6.9

0000000000000

0

0.1

0.7

AEP,UK MODEL

AEP,UK MODEL

AEP,UK MODEL

AEP,UK MODEL

(US,CND)

US,CND MODEL

R3010

47k

0.5%

R3011

47k

C3037

1

C3032 1

C3027

1

0.5%

R3012

47k

R3013

47k

0.5%

R3021

47k

0.5%

R3022

47k

50V

C3024

4.7

50V

C3034

4.7

C3025

0.1

C3022 1

R3020

47k

C3026

0.1

8

7 6 5

432

1

NJM4565M(TE2)

IC3002

CC02
100p

50V

C409

4.7

R451

1k

R402

1k

C400

2200p

R466

1k

R459

1k

R470

47k

R409

1k

RY301

12V

2SC3052EF-T1-LEF

Q301

RELAY DRIVER

50V

C471

4.7

CC01
100p

CC51
100p

CC09
100p

R401

1k

R467
100k

R452

1k

CC59
100p

R453

1k

CC03
100p

CC53
100p

R403

1k

R454

1k

CC04
100p

CC54
100p

R404

1k

C403

2200p

R405

1k

50V

C458

4.7

R455

1k

R408

1k

CC05
100p

CC08
100p

50V

C408

4.7

CC58
100p

CC55
100p

R458

1k

C405
2200p

0.1

C489

100pC449

0.1

C499

100pC450

JR434 0

JR435 0

C430 220p

C431 220p

R301

2.2k

MA2J1110GLS0

D301

1

2

3

4

5

6

7

8

9

10

11

12

13

CNP410

13P

VOL IC CLK

VOL IC DATA

VACS CTRL

PROTECTOR

+7V

-7V

FR OUT

AGND

FL OUT

SW

AGND

C OUT

SR OUT

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

CNP411

15P

AGND

SL OUT

+7V

SBR OUT

SBL OUT

FL IN

AGND

FR IN

TUNER R

AGND

TUNER L

DMPORT L-

DMPORT R-

DMPORT L+

DMPORT R+

R3023

47k

R302

100

R303

100

1

3

4

CNP430

3P

VID2_AU_L

VID2_AU_GND

VID2_AU_R

R430 1k

R431 1k

JS409 JS410 JS411

JS461JS459 JS460

JS400

JS470

JS471

JS472

JS473

1k

R449

1k

R450

JS408

JS458

JR406

0

JS3002

JS3037

JS3022

JS3001

R304

47k

JS401

1
3
4
5
6

CN434

5P

XMR
XMGND
XML

-7V
+7V

JS432

R487

2.2

R488

2.2

25V

C487

47

25V

C488

47

1234

56789101112 13 14 15 16 17 18

19 20

21

22232425262728293031323334

35

3637383940

414243444546474849

50515253545556

57585960

6162636465

66676869707172

73747576777879

80

BD3471KS2

IC400

GND

HPFN
LPF01
LPF02

LPFN2
LPFN1

SWVOL

VCC

DGND

DATA

CLK

VEE
FROUT
FLOUT

SWOUT

COUT

SROUT

SLOUT

SBROUT
SBLOUT

GND

GND

RECL4

RECR4

RECL3

RECR3

RECL2

RECR2

RECL1

RECR1

GND

INL16

INR16

INL15

INR15

INL14

INR14

INL13

INR13

GND

INL12

INR12

INL11

INR11

INL10

INR10

INL9

INR9

INL8

INR8

INL7

INR7

INL6

INR6

INL5

INR5

INL4

INR4

INL3 (DCAC_MIC)

INR3 (DCAC_MIC)

INL2 (DMPORT_L)

INR2 (DMPORT_R)

INL1 (TUNER_L)

INR1 (TUNER_R)

GND

SBLIN

SBRIN

SLIN

SRIN

CIN

SWIN

LIN

RIN

GND

ROUT

LOUT

GND

ROUT SUB

LOUT SUB

GND

A_GND

OUT_FR_1
OUT_FL_1

OUT_C_1
OUT_SR_1
OUT_SL_1

OUT_SBL_1

PROTECTOR
SW_PREOUT_RY

OUT_SBR_1

+15V

+/-15V_GND

SACD_RET_GND

SYSTEM_GND_+_WIRE

-7V

+7V

CC52
100p

G

J401

6P

G

J405

1P

G

J404

4P

50V

C459

4.7

G

J403

4P

MAIN BOARD (1/3)

ELECTRICAL VOLUME

IC400

DMPORT AMP

IC3002

+-+-

VCC

VEE

L

R

IN

SA-CD/CD/CD-R

L

R

INTV

L

R

AUDIO INSAT

L

R

L

R

AUDIO OUT

AUDIO IN

VIDEO 1

AUDIO OUT

SUB WOOFER

-1

-2

-3

-4

-5

-6

-1

-2

-3

-4

R

OUT

L

DVDRAUDIO IN

L

-4

-1

-3

-2

5-9. SCHEMATIC DIAGRAM – MAIN Section (1/3) –

• See page 48 for IC Block Diagrams.

(Page 35)

(Page 27)

(Page 41)

(Page 27)

(Page 33)

(Page 33)

(Page 28)

STR-DG720

STR-DG720

2727

5-10. SCHEMATIC DIAGRAM – MAIN Section (2/3) –

• See page 48 for IC Block Diagrams.

1714124

B

E

35 152

K

111096

D

A

1387

F

C

1

J

G

L

M

H

I

1816

1

(1/3)

MAIN

BOARD

C

(2/3)

CNP503

DIGITAL
BOARD

MAIN BOARD (3/3)

4

IC B/D

IC B/D

IC B/D

IC B/D

BOARD

(1/3)

2

MAIN

-55.3

55.3

55.3

1.2

-1.1

54.8

-0.3

-0.2

-0.2

-0.355-1.1

1.2

0

55.3

55.3

-55.3

-1.1

54.8

-0.3

-0.2

-0.2

-0.355-1.1

1.2

0

1.2

-0.3

-0.2

-0.2

-0.355-1.1

1.2

0

1.2

55.3

55.3

-55.3

-1.1

54.8

-0.3

-0.2

-55.3

0

1.2

55.3

55.3

-55.3

-1.1

54.8

1.2

-1.1

-1.1

1.2

55.5

0

-1.1

-55.7

0

0.5

-0.6

-1.1

-1.1

1.2

55.5

0

-1.1

-55.7

0

-0.6

0.5

1.2

0

-1.1

-55.7

0

-0.6

0.5

1.2

-1.1

-1.1

1.2

55.5

0

-1.1

-55.7

0

-0.6

0.5

1.2

-1.1

-1.1

1.2

55.5

0

-1.1

-55.7

0

-0.6

0.5

1.2

-1.1

-1.1

1.2

55.5

1.2

-1.1

-1.1

1.2

55.5

0

-1.1

-55.7

0

-0.6

0.5

1.2

-1.1

-1.1

1.2

55.5

0

-1.1

-55.7

0

-0.6

0.5

0

0

-44.7

4

0

0

0

0

0

0

0

0

0

-44.7

0

0

0

-44.7

0

0

0

-44.7

0

0

0

0

0

-44.7

0

0

0

0

0

0

0

0

0

-44.7

0

0

0

-44.7

0

0

0

4

0

4

4

0

4

0

0

4

4

0

0.8

0.2

0.8

0.2

0.2

0.8

0.2

0.8

0.8

0.2

15.6

0

3.3

3.3

0

-47.1

-47.1

0

-55.9

2.9

-48.4

AEP

,UK MODEL

AEP,UK MODEL

AEP,UK MODEL

AEP

,UK MODEL

2SA1163L-TE85L

Q562

2SC3052EF-T1-LEF

Q570

2SA1163L-TE85L

Q561

L578

123

MN2488-OPY-MK

Q553

SBR +VE

B

C

E

2SA1115TP-EF

Q551

R563

0.22X2 5W

R579

10

R564

1.5k
R572

15k

R565

15k

123

MP1620-OPY-MK

Q554

SBR -VE

B

C

E

R578

4.7

50V

C571

10

R556

2.2k

R580

47k

C561
220p

R558
560

R566

68k

R562

6.2k

C579

0.022

2%

R561

4.7k

R557

82k

25V

C557

47

500V

C559

47p

C570

0.01

500V

C558

47p

2SC3623ATP-LK

Q552

2SA1163L-TE85L

Q611

560

R658

500V

C609

47p

15k

R672

500V

C658

47p

2SA1115TP-EF

Q601

123

MN2488-OPY-MK

Q653

C +VE

B

C

E

6.2k

R662

47k

R680

2.2k

R656

50V

C621

10

25V

C607

47

2SA1163L-TE85L

Q662

1.5k

R664

2SC3623ATP-LK

Q602

2SA1115TP-EF

Q651

R607

82k

L628

R614

1.5k
R622

15k

2%

R611

4.7k

R608

560

50V

10

C671

0.022

C679

82k

R657

C611

220p

2%

4.7k

R661

R628

4.7

0.022

C629

2SA1163L-TE85L

Q661

68k

R666

2SC3052EF-T1-LEF

Q670

123

MP1620-OPY-MK

Q604

SBL -VE

B

C

E

25V

47

C657

123

MN2488-OPY-MK

Q603

SBL +VE

B

C

E

10

R679

R629

10

R615
15k

123

MP1620-OPY-MK

Q654

C -VE

B

C

E

R630

47k

L678

15k

R665R663

0.22X2 5W

2SA1163L-TE85L

Q612

R606

2.2k

0.01

C670

R613

0.22X2 5W

2SC3052EF-T1-LEF

Q620

C620

0.01

R612

6.2k

220p

C661

R616

68k

2SC3623ATP-LK

Q652

500V

47p

C659

R678

4.7

2SA1163L-TE85L

Q711

560

R808

R813

0.22X2 5W

123

MN2488-OPY-MK

Q803

SL +VE

B

C

E

47k

R830

R863

0.22X2 5W

500V

C758

47p

2SA1163L-TE85L

Q862

2SA1115TP-EF

Q701

123

MN2488-OPY-MK

Q753

R +VE

B

C

E

25V

47

C807

2%

4.7k

R811

47k

R780

82k

R857

2SA1115TP-EF

Q801

2%

68k

R854

2SA1163L-TE85L

Q762

1.5k

R764

2SC3623ATP-LK

Q702

2%

4.7k

R861

1.5k

R714

100p

C804

500V

C708

47p

0.01

C870

560

R708

50V

10

C771

123

MP1620-OPY-MK

Q804

SL -VE

B

C

E

220p

C711

2%

4.7k

R761

500V

3p

C805

25V

47

C857

68k

R766

2SC3052EF-T1-LEF

Q770

2%

68k

R704

1.5k

R814

2%

R805

22k

25V

47

C757

123

MN2488-OPY-MK

Q703

L +VE

B

C

E

10

R779

10

R729

19876543215 14 13 12 11 10

UPC2581V-S

IC800

MUTE

+VOUT1

-VOUT1

COMP1

NF1

IN1

GND

IN2

NF2

COMP2

-VOUT2

+VOUT2

VCC

VCC

VEE

L878

15k

R815

500V

3p

C855

123

MP1620-OPY-MK

Q754

R -VE

B

C

E

15k

R822

2SA1163L-TE85L

Q712

2.2k

R706

500V

C858

47p

2SC3052EF-T1-LEF

Q720

0.01

C720

1.5k

R864

2%

R705

22k

100p

C704

220p

C761

2SC3623ATP-LK

Q752

100p

C754

R778

4.7

560

R758

500V

47p

C709

0.01

C820

15k

R772

2SA1163L-TE85L

Q811

2SC3623ATP-LK

Q802

2%

68k

R754

100p

C854

2.2k

R856

0.022

C879

500V

47p

C809

2SA1163L-TE85L

Q812

2.2k

R756

2%

68k

R804

50V

10

C721

L828

123

MP1620-OPY-MK

Q854

SR -VE

B

C

E

220p

C861

500V

3p

C705

25V

47

C707

68k

R816

2SA1115TP-EF

Q851

2SA1115TP-EF

Q751

50V

10

C821

10

R879

82k

R707

19876543215 14 13 12 11 10

UPC2581V-S

IC700

MUTE

+VOUT1

-VOUT1

COMP1

NF1

IN1

GND

IN2

NF2

COMP2

-VOUT2

+VOUT2

VCC

VCC

VEE

L728

2.2k

R806

15kR722

2%

4.7k

R711

10

R829

500V

C808

47p

0.022

C779

2SA1163L-TE85L

Q861

82k

R757

560

R858

R728

4.7

0.022

C729

2SA1163L-TE85L

Q761

123

MP1620-OPY-MK

Q704

L -VE

B

C

E

6.2k

R862

500V

47p

C859

15k

R865

2SC3052EF-T1-LEF

Q870

15k

R872

68k

R866

47k

R880

15k

R715

L778

R878

4.7

6.2k

R812

15k

R765

2SC3623ATP-LK

Q852

R763

0.22X2 5W

0.01

C770

R713

0.22X2 5W

6.2k

R712

82k

R807

500V

3p

C755

50V

10

C871

123

MN2488-OPY-MK

Q853

SR +VE

B

C

E

0.022

C829

68k

R716

R828

4.7

220p

C811

500V

47p

C759

2SC3052EF-T1-LEF

Q820

39k

R326

2SC3052EF-T1-LEF

Q324

50V

10

C325

2SA1163L-TE85L

Q323

10k

R327

6.8k

R325

2SC3052EF-T1-LEF

Q325

2SA1163L-TE85L

Q320

2SC3052EF-T1-LEF

Q321

1k

R328

100V

10

C546

1

R545

100V

10

C545

500V

C605

3p

500V

3p

C655

19876543215 14 13 12 11 10

UPC2581V-S

IC600

MUTE

+VOUT1

-VOUT1

COMP1

NF1

IN1

GND

IN2

NF2

COMP2

-VOUT2

+VOUT2

VCC

VCC

VEE

R601

1k

50V

C601

10

2%

68k

R604

C602
100p

100p

C654 C604

100p

50V

C651

10

2%

R605

22k

1k

R651

100p

C652

2%

68k

R654

68k

R652

1k

R751

1k

R701

50V

C751

10

100p

C752

100p

C702

50V

C701

10

68k

R752

68k

R702

1k

R851

1k

R801

50V

C851

10

100p

C852

100p

C802

50V

C801

10

68k

R852

68k

R802

2.2k

R375

2SC3052EF-T1-LEF

Q375

RY375

12V

1
3
4
5

CN792

4P

HP DETECT
R-CH
GND
L-CH

RY365

12V

2SC3052EF-T1-LEF

Q365

R365

2.2k

R730

47k

2SC3052EF-T1-LEF

Q360

RY360

12V

2SC3052EF-T1-LEF

Q355

RY355

12V

RY350

12V

2SC3052EF-T1-LEF

Q350

2.2k

R350

1k

R355

1k

R360

MA2J1110GLS0

D661

MA2J1110GLS0

D570

MA2J1110GLS0

D360

MA2J1110GLS0

D365

MA2J1110GLS0

D870

MA2J1110GLS0

D820

MA2J1110GLS0

D611

MA2J1110GLS0

D326

MA2J1110GLS0

D861

MA2J1110GLS0

D561

MA2J1110GLS0

D670

MA2J1110GLS0

D811

MA2J1110GLS0

D350

MA2J1110GLS0

D325

MA2J1110GLS0

D761

MA2J1110GLS0

D770

MA2J1110GLS0

D355

MA2J1110GLS0

D375

MA2J1110GLS0

D720

MA2J1110GLS0

D320

MA2J1110GLS0

D327

MA2J1110GLS0

D620

MA2J1110GLS0

D711

JR632

0

RY37

0

12V

MA2J1110GLS0

D370

2SC3052EF-T1-LEF

Q370

R370

2.2k

TB602

6P

RR13 10CC13 0.01

RR14 10CC14 0.01

10RR110.01CC11

0.01CC12 10RR12

0.01CC15 10RR15

0.01CC16 10RR16

10RR170.01CC17

RR18 10CC18 0.01

RR19 10CC19 0.01

22k

R720

22k

R670

22k

R870

22k

R770

22k

R820

22k

R620

22k

R570

50V

C644

10

50V

C844

10

50V

C744

10

R37133R372

47

R367

47

R366

33

47

R36233R361

47

R35733R356

47

R35233R351

47

R37733R376

JS390

2W680R393

2W

R392

680

500V

C603

33p

JS397

4.7k

R771

4.7k

R821

4.7k

R621

22k

R824

R674

22k

R724

R624

22k

22k

R874

R574

22k

22k

R774

R573 47k

R773 47k

R873 47k

R723 47k

R673 47k

R823 47k

R623 47k

100

R760

100

R859

100

R709

100

R809

100

R810

100

R860

100

R710

100

R660

100

R659

100

R759

R560

100

R559

100

R610

100

R609

100

2%

R853 2.2k

2%R703

2.2k

2%R803

2.2k

2%

R753 2.2k

2%

R653 2.2k

2%2.2k

R603

JS712

JS710

JS611

JS810

JS711

500V

C608

47p

6.2k

R762

JSH550JS550 JS551 JS552 JS553

JS554JS555

JS559

JS560

JS561

JS562

JS563

JS564

JS565

JS566

JS567

JS568

JS569

JS570

JS571

JS572

JS600 JS601 JS602 JS603

JS604

JS605

JS606

JS607

JS608

JS609 JS612

R602

68k

500V

C853
33p

500V

C803

33p

500V

C653

33p

500V

C703

33p

500V

C753

33p

JS350

JS395

JS393

JS394

JS392

JS391

10V

C606

220

10V

C756

220

10V

C856

220

10V

C656

220

10V

C806

220

JSH551

R373

47k

47k

R358

47k

R363

47k

R368

R353

47k

47k

R378

JS398

TB606

8P

10V

C320

330

10V

C323

330

R320

20k

4.7k

R671

4.7k

R721

R323

39k

4.7k

R571

SW_PREOUT_R

Y

PROTECTOR

OUT_SBL_1

OUT_SL_1

OUT_SR_1

OUT_C_1

OUT_FL_1

OUT_FR_1

OUT_SBR_1

STK/UPC_-B

+B

SYSTEM_GND_+_WIRE

SACD_RET_GND

+7V

DETECT

+/-15V_GND

+15V

-B

4.7k

R871

JS511

2%

R555

22k

R552 68k500V

C555

3p

2%

R553 2.2k

C552 100p

JS556

JS558

500V

C553

33p

2%

R554

68k

JS557

R551

1k

50V

C544

10

JS610

10V

C556

220

19876543215 14 13 12 11 10

UPC2581V-S

IC500

MUTE

-VOUT1

+VOUT1

COMP1

NF1

IN1

GND

IN2

NF2

COMP2

-VOUT2

+VOUT2

VCC

VCC

VEE

50V

C551

10

C554
100p

JS573

TB601

4P

10V

C706

220

1

3

4

5

6

7

8

CN350

7P

1
2
3
4

CNP790

4P

C791

0.1

J790

(CHASSIS)

MAIN BOARD

(2/3)

PRE DRIVER

IC500

IC600

PRE DRIVER

IC700

PRE DRIVER

IC800

PRE DRIVER

Q551-554,601-604,651-654,701-704,
Q751-754,801-804,851-854

POWER AMP

Q561,562,611,612,661,662,711,712,
Q761,762,811,812,861,862

CURRENT DETECT

Q570,620,670,720,770,820,870

OVERLOAD DETECT

Q350,355,360,365,370,375

RELAY DRIVER

-

­+
+

R

L

FRONT A

-

+

CENTER

+

­+

-

L

R

SURROUND

Q320,321,323-325

PROTECTOR

SBR RY
FRONT A RY
SW PREOUT RY
FRONT B RY
C/SUR/SBL RY
HP RY
HP DETECT

R-CH

HP DETETCT

TP790

HEADPHONE BOARD

PHONES

L-CH

GND

R

FRONT B

+

-

IMPEDANCE USE 8-16Ω

-

SPEAKERS

+

L

R

L

-

+

SURROUND BACK

-

+

(Page 28)

(Page 26)

(Page 26)

(Page 32)

STR-DG720

STR-DG720

2828

5-11. SCHEMATIC DIAGRAM – MAIN Section (3/3) –

E

1

G

7

B

95

D

A

3 106

C

24 8

F

BOARD
CN2000

H

DCAC

VIDEO

E

CNP203

BOARD

BOARD

STANDBY

J

CN912

D

CNP505

(2/3)

DIGITAL

BOARD

POWER TRANSFORMER

(MAIN)

K

CN108

DISPLAY

I

BOARD

L

T901

POWER TRANSFORMER

(MAIN)

T901

3

MAIN BOARD (1/3) MAIN BOARD (2/3)

4

6.915.6

-16.5 -6.9

6.9

-5.5

-3.7

-5.5

6.3

-55.6-55.7

-54.8

6.2

-5.5

-5.5

1.1

-6.9

-20.1

-20.6

-55.6

(US,CND)
(AEP,UK)

1

1

AEP,UK MODEL

US,CND MODEL

100V

0.22

C920

100V

0.22

C921

10k

R503

220k

R507

2SC1815GR-TPE2

Q500

10k

R504

8765

4321

NJM4565M(TE2)

IC565

470k

R502

10k

R505

0.1

C500

1

R546

2SB734-T-34

Q930

RELAY DRIVER

100V

0.1

C933

35V

47

C931

4.7

R932

22k

R930

PTZ-TE25-5.6B

D930

10k

R931

35V

47

C932

1SR154-400TE-25

D352

0.47

C350

0.47

C352

1SR154-400TE-25

D943

0.47

C940

16V

3300

C904

0.47

C941

1SR154-400TE-25

D941

1SR154-400TE-25

D940

1SR154-400TE-25

D942

E

ET902

1
3
4

CN500

3P

+15V
GND

-15V

RT1P241C-TP-1

Q501

MA2J1110GLS0

D501

JS922

JS920

1

3

5

CNP921

3P

R1 (UPPER TAP)

R1 GND

R1 (UPPER TAP)

1
2
3

CNP500

3P

+7V

GND

-7V

MAZ8200GMLS0

D931

~

~

D5SBA20-4003

D921

RECT

C923
71V

10000

C922

71V

10000

JS510

2W

R510

100

MAZ8300GMLS0

D500

10k

R501

R506

47k

R511

IO

G

TA7807S

IC350

IO

G

TA79007SB

IC352

1

2

3

3P

CNP930

-20V

F1

F2

1
2
3
4
5
6
7

7P

CNP912

R2 RETURN GND
HP_GND(NC)

-15V
STBY GND
R2 GND
+15V

1
2
3

3P

CN941

GND (R4)
+7V (R4)
GND (R4)

JS930

35V

47

C930

C900

0.1

1/2W

0.15

R940

16V

100

C353

16V

100

C351

+15V

+/-15V_GND

DETECT

+7V

SACD_RET_GND

SYSTEM_GND_+_WIRE

-B

+B

STK/UPC_-B

+7V

-7V

SYSTEM_GND_+_WIRE

SACD_RET_GND

+/-15V_GND

+15V

1

6

2

3

4

5

6P

CNP940

F2

NC

GND

F1

R4 -AC

R4 +AC

MAIN BOARD (3/3)

IC350

+7V REG

-7V REG

IC352

OVERLOAD DETECT AMP

IC565

+

VEE

--+

VCC

13

2

1

23

Q500,501

B- SWITCH

NC

D940-943

RECT

330 2W
470 2W

R511

(Page 27)(Page 26)

(Page 35)

(Page 42)

(Page 46)

(Page 32)

(Page 44)

(Page 46)

(Page 46)