Sony STR-DG720 Service Manual ▷ View online
STR-DG720
STR-DG720
21
21
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
XM DACMC
BCK
DATA
LRCK
SCK
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
XM MOXMI
KEY/DISPLAY
SECTION
J
4
2
IC106
XM+5V
REG
STR-DG720
STR-DG720
22
22
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
79
84
SW NETWORK
S101-108
RV102
MASTER
VOLUME
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
F2
71
FL_DATA
7 DIN
69
FL_LAT
XM MOXMI
XM MIXMO
XM MIXMO
9 STB
70
FL_CLK
8 CLK
GRID1
I
GRID11
SEG1
I
SEG17
VOL_JOG(2A)
VOL_JOG(2B)
VOL_JOG(2B)
INPUT ENCODER A
INPUT ENCODER B
AD KEY2
SW NETWORK
S109–113,115
AD KEY1
2
3
3
89
90
90
RV101
INPUT
INPUT
SELECTOR
2
3
3
TUNING A
TUNING B
5
6
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
IC1006
1
RESET
IC1005
IC1005
42
I
32
9
4
2
8
6
3
93 XM MOXMI
US,CND MODEL
92 XM MIXMO
1
5
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
CND : Canadian model
@
STR-DG720
STR-DG720
23
23
6
2
3
3
DRIVE
POWER AMP
Q701–704
CURRENT
DETECT
Q711,712
RY350
PRE DRIVER
IC700
IN 1
+VOUT1
–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
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
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
–VOUT2
OVERLOAD
DETECT
D670,Q670
6
2
3
3
DRIVE
POWER AMP
Q801–804
CURRENT
DETECT
Q811,812
PRE DRIVER
IC800
IN 1
+VOUT1
–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
7
2
IC565
–55V
–B
+A5V
+5V
REG
1
3
IC1001
+3.3V
+3.3V
REG
2
4
IC1013
+1.2V
+1.2V
REG
3
1
IC1002
+3.3V
REG
1
3
IC1904
+9V
REG
1
3
IC1902
–15V
+15V
+7V
REG
1
3
IC350
–7V
REG
2
3
IC352
+5V
REG
1
3
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
R
Y
HP
R
Y
C/SUR/SBL
R
Y
FRONT
B R
Y
SW_PREOUT_R
Y
SBR R
Y
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
3
DRIVE
POWER AMP
Q601–604
CURRENT
DETECT
Q611,612
IN 1
+VOUT1
–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
: 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
24
24
– HDMI RE Board –
For Schematic Diagrams.
Note:
• All capacitors are in
• 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.)
(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 M
• Voltages are taken with VOM (Input impedance 10 M
Ω).
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
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 :
CND :
Canadian
model
TH :
Thai
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 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.
the parts face are indicated.
Parts on the pattern face side seen from
the pattern face are indicated.
Note:
The components identi-
fi ed by mark
The components identi-
fi ed by mark
0 or dotted
line with mark
0 are criti-
cal for safety.
Replace only with part
number specifi ed.
Replace only with part
number specifi ed.
Note:
Les composants identifi és
par une marque
Les composants identifi és
par une marque
0 sont
critiques pour la sécurité.
Ne les remplacer que par
une piéce portant le nu-
méro spécifi é.
Ne les remplacer que par
une piéce portant le nu-
méro spécifi é.
• Abbreviation
CND : Canadian model
TH :
CND : Canadian model
TH :
Thai
model
2.5 Vp-p
28.322 MHz
IC3511
JG (XTALOUT)
3.4 Vp-p
10 MHz
IC3519
RB (XOUT)
1 V/DIV, 20 nsec/DIV
1 V/DIV, 50 nsec/DIV
1.6 Vp-p
45.158 MHz
IC102
XI (OSCOUT)
0.05 V/DIV, 0.2 μsec/DIV
– 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 –
– DIGITAL Board –
Ver. 1.1
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