Sony STR-DB780 Service Manual

STR-DA1ES/DB780
2222
5-9. SCHEMATIC DIAGRAM – DIGITAL Board (2/3) – • See page 44 for Waveform.
CNS4
R1701
R1702
R1650
R1651
R1652
R1653
C1616
C1615
C1614
C1613
R1630
R1629
R1628
R1627
R1662
R1663
C1631
C1632
R1632
R1687
C1606
R1654
C1905
C1906
D1905
C1908
D1906
D1907
IC1903
C1910
C1909
C1912
C1911
IC1904
C1611
C1610
C1609
C1608
C1619R1691R1304R1305
R1635
C1602
C1618
D1603
R1671
R1672
R1669
C1917
C1918
IC1906
R1639
R1640
R1641
R1600
R1690
R1602
R1631
R1638
R1698
R1699
R1665
R1664
R1308
R1673
R1674
FB1602
R1668
IC1604
R1703
R1704
R1658
C1312
R1624
CNS2
Q1602
R1682C1634
R1684
R1683
C1601R1626
R1686
R1685
R1656
R1610
R1609
R1608
R1607
R1606
R1605
R1604
R1603
R1601
R1619
R1618
R1617
R1616
R1615
R1614
R1613
R1612
R1611
R1622
C1229 C1626 C1627
R1693
R1695
R1675
R1692
R1680
R1681
CNS3
Q1601
R1676
R1677
R1678
R1679
R1643
R1694
R1644
R1645
R1646
R1647
R1648
R1649
C1635
R1621
CNP5
R1623
R1625
R1657
R1655
FB1603
CN1109
C1617
IC1602
JR1114
CNP6
Q1607
IC1901
FB1601
JR1113
JR1112
JR1688
R1697
C1620
R1642
C1612
C1605
IC1601
C1659
C1658
R1689
C1604
D1601
CNS8
L1901
X1601
R1636
C1603
R1633
R1634
R1667
31P
10k
10k
10k
10k
10k
10k
0.022
0.022
0.022
0.022
10k
10k
10k
10k
3.3k
3.3k
0.1
0.1
47k
10k
47
16V
10k
0.1
470 16V
1SR154-400 TE-25
470 16V
1SR154-400 TE-25
1SR154-400
TE-25
2905
470
16V
0.1
470
16V
0.1
2933
0.01
0.01
0.01
0.01
0.110k47k47k
10k
0.1
0.1
ISS352
10k
10
4.7k
0.1
47
16V
7805
1k
1k
1k
4.7k
1k
4.7k
4.7k
4.7k
4.7k
4.7k
100
100
1k
1k
1k
5.6k
BR24C16
10k
10k
100
0.1
10k
21P
2SC2712
-YG
100k0.1
1k
1k
0.110k
1k
1k
10k
1k
1k
1k
1k
1k
100
100
1k
1k
100
100
100
1k
1k
1k
1k
1k
1k
10k
0.1 0.1 10
50V
47k
10k
10k
47k
1k
1k
7P
RT1N141C-T
1k
1k
1k
1k
1k
1k
1k
1k
1k
1k
1k
1k
0.1
1k
3P
1k
10k
10k
10k
3P
0.01
S-80929ANM
P-DD6-T2
0
6P
2SC2712-YG
SI-3001KWF
0
0
0
0.1
10k
0.1
0.1
MB90478PFV-G
-123-BND
0.01
0.01
10k
0.1
ISS352
11P
0
16MHz
10k
0.1
10k
47k
1k
A1
A2
A3
A4
A5
A6
A7
C1
C2
C3
C
C
1
C
C
2
C
C
4
C
C
5
CC6
C
C
7
C
C
8
C
C
9
C
C
1
0
C
C
1
1
CC1
CC2
CC4
CC5
CC6
CC7
CC8
CC9
CC10
CC11
C
C
1
2
CC12
D
D
3
D
D
4
D
D
5
D
D
1
D
D
2
E
E
1
E
E
2
E
E
3
E
E
4
E
E
5
E
E
6
E
E
7
E
E
8
E
E
9
FF1
FF2
FF3
FF4
FF5
FF6
FF9
FF10
F
F
1
1
F
F
9
FF7
FF8
GG1
GG2
GG3
GG4
H1
H2
H3
H4
H5
H6
H7
H8
H
1
H
2
H
3
H
4
H
5
H
6
H
7
H
8
H9
H
9
H10
H11
H12
H13
H14
H15
H16
H17
H18
H19
H10
H11
H12
H13
H14
H14
H
1
5
H16
H17
H18
H19
H21
H22
J1
J2
J3
J
1
J2
K
1
K
3
K
4
K
5
K
6
K
7
K
8
K
9
K
1
0
J
3
K
2
J3
K8
K10
J4
J4
G
G
1
G
G
2
G
G
3
G
G
4
H21
H22
H20
H20
∗
DIR
VIDEO SW
TUNER
DSP CODEC
DSP
VO
L
IC
/ TU
N
ER
OPTICAL IN
FL
D
R
V
/LE
D
D
R
V
EEPROM
DATA
CLK
+15V
-15V
STOP
FL1 FL2
D
.G
N
D
8V
-5V
G
N
D
G
N
D
F1
F2
GND
+5V
STB
CLK
DIN
POWER SW.
VOL(+)
VOL(-)
JOG(+)
JOG(-)
SIRCS
A/D(3)
A/D(2)
A/D(1)
A/D(0)
SP SW.
DCS LED
GND
GND
LED LATCH
+3.3V(STBY)
MODE LED
INPUT LED
MULTI LED
2CH LED
AUTO DEC LED
2ND VOL LAT
FUN LAT SW
FUNC(A)
FUNC(B)
FLASH1
FLASH2
VDD
GND
RESET
MD0
MD2
X0
X1
VCC3
XMODE
CLK
CE
DI
DO
ERROR
CKSEL1
SELECT1
SELECT2
SW1
SW2
SW3
SW4
FUNC(A)
FUNC(B)
D
A
TA
O
G
P9
B
ST
H
C
S
H
A
C
N
X
R
S
T
P
M
P
D
S
M
U
TE
C
D
T
1
V
S
S
S
C
L
C
S
D
A
TA
C
LK
H
D
O
U
T
H
D
IN
H
C
L
K
F
.M
U
T
E
V
C
C
5
A
N
A
/D
IG
F
LA
S
H
2
H
P
D
E
T
ECT
D
C
S
L
ED
LA
TC
H
- V
O
L
IC
N
C
2N
D
VO
L
LA
T
S
P
S
W
ITC
H
/FLA
S
H
1
IN
PU
T LE
D
M
U
L
TI L
ED
2CH LED
AVCC
AVRH
AVSS
A/D0
A/D1
A/D2
A/D3
VSS
RDS SIGNAL
VERSION
MODEL
SDA
SCL
MODE LED
FUN LAT SW
STOP
MD0
MD1
MD2
XSTATE
R
D
S
C
L
O
CK
R
D
S
D
A
T
A
S
IR
C
S
P
O
W
ER
K
E
Y
FU
S
E D
ET
EC
T
V
O
L
(A
)
VO
L(B
)
JO
G
(A
)
JO
G
(B
)
D
IN
C
L
K
C
O
N
T
R
O
L
A
1 O
U
T
C
O
N
TR
O
L
A
1 IN
P
O
W
E
R
R
E
LA
Y
P
R
O
T
EC
T
O
R
H
EA
D
P
H
O
N
E R
ELA
Y
W
O
O
FE
R
R
E
LA
Y
R
E
A
R
R
E
LA
Y
C
E
N
T
R
E
R
E
LA
Y
S
T
E
R
E
O
TU
N
ED
M
U
T
E
D
O
R
S
TX
X
1
A
X0A
VSS
S
L
AT
C
H
FR
O
N
T
R
E
LA
Y
-5V
+5V
(2/3)
EEPROM
FUNC-LAT
SB-RY
PRE-RY
2ND-RY
C-RY
REAR-RY
SP-B-RY
HP-RY
SP-FR-RY
HP-CONT
CD RY
PROTECTOR
S-MUTE
NC
NC
MUTING
SWITCH
MUTING
SWITCH
(FOR CHECK)
D GND
D GND
D GND
RESET SIGNAL
GENERATOR
CD NC
O
U
T
V
S
S
VC
C
(EXCEPT DB780:AEP,UK)
(D
B
78
0)
P.RY
V
S
W
4
V
S
W
3
V S
W
2
V
S
W
1
CTR
L
A
1
CTR
L
A
1 G
N
D
+5V REGULATOR
G
IO
I/O BUFFER
+5V REGULATOR
G
IO
G
IO
+3.3V REGULATOR
VOUT2 VIN
VC
VOUT1
GND
(EXCEPT DB780:AEP,UK)
∗
R1697
0
2.2k
4.7k
(DA1ES)
(DB780:AEP,UK)
(DB780:SP,MY,TW,KR,CH)
AFD LED
FL
S
T
B
SYSTEM CONTROLLER
N
C
+3.3V/+2.5V
REGULATOR
-30
V
8
V
-30V
(Page 21)
(Page 27) (Page 43) (Page 43)
(Page 32)
(Page 39)
(Page 31)
(Page 23)

Sony STR-DB780 Specifications

General

Type	Stereo Receiver
Total Harmonic Distortion	0.09 %
Digital inputs	2 Optical, 1 Coaxial
Weight	10.5 kg
Video inputs	composite
Video outputs	1 composite, 1 S-Video
Output Power	100 Watts (8 Ohms, 20 Hz - 20 kHz, 0.09% THD)
Signal-to-Noise Ratio	96 dB (Line in)
Input Sensitivity	150 mV (Line in)