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Sony STR-DB780 Service Manual

Sony STR-DB780
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STR-DA1ES/DB780
3131
5-18. SCHEMATIC DIAGRAM – MAIN Board (1/3) – • See page 45 for IC Block Diagram.
R116
R115
R114
R113
R112
R111
Q401Q451Q701Q501Q601Q551
D
8
1
2
D
8
0
4
D
8
1
8
D803
R827
IC621 IC421
C421
C621
R
7
2
1
R
4
7
1
C721
C521
C571
R571
R521
R815
C
8
1
6
C122
CN806
R836
IC805
IC804
Q810
R451 R401R701R501R601R551
R833
R826
R119
C120
C
1
2
3
CN807
J111
C119
JW102
JW101
R621
IC521
C121
Q813
IC111
R421
JW100
C471
JW401
JW402
JW403
JW404
1k
1k
1k
1k
1k
1k
2SC3623A2SC3623A2SC3623A2SC3623A2SC3623A2SC3623A
1
S
S
1
3
3
1
S
S
1
3
3
1
S
S
1
3
3
1SS133
1k
M5218AP M5218AP
22
50V
22 50V
1
0
0
k
1
0
0
k
22
50V
22
50V
22
50V
100k
100k
10k
0
.1
2200p
21P
10k
TC74ACT08P
TC74ACT08P
BN1F4M
6.8k 6.8k6.8k6.8k6.8k6.8k
1M
1M
1k
0.01
1
0
0
p
21P
6P
2200p
100k
M5218AP
2200p
BN1F4M
TC9274N-016
100k
22
50V
A1
A2
A3
A4
A5
B
1
B
2
B
3
B
4
B
1
1
B
1
2
B
1
3
B
1
4
B
1
5
B
1
6
B
1
7
B
1
8
B
1
9
B
2
0
W
W
C
C
S
R
S
R
S
L
S
L
F
N
T
R
F
N
T
R
F
N
T
L
F
N
T
L
9
S
B
Z7
Z8
Z9
Z10
Z11
Z12
Z13
Z
7
Z
8
Z
9
Z
1
0
Z
1
1
Z
1
2
Z
1
3
Z
1
3
FNTL
FNTR
SL
SR
C
W
9SB
TUNL
TUNR
SORR
SORR
SORL
S
O
R
L
SMUTE
SMUTE
FUNLAT
FUNLAT
2NDVOL
2NDVOL
FUNC
FUNC
FUNC
CLK
CLK
DATA
DATA
D
A
T
A
CLK
LIN
RIN
VRIN1
VRIN2
VRIN3
VRIN4
PRO
HPCONT
HPRY
REARRY
SBRY
FRRY
PRERY
+15V
-15V
S-MUTE
PROTECTOR
HP-CONT
SP-FR-RY
HP-RY
REAR-RY
C-RY
2ND-RY
PRE-RY
SB-RY
FUNC-LAT
CLK
DATA
CD-RY
C
SP-B-RY
W
NC
NC
FUN LAT SW
2ND VOL LAT
(CHASSIS)
(1/3)
LINE AMP
LINE AMP
LINE AMP
LEVEL SHIFT
LEVEL SHIFT
MUTINGMUTINGMUTINGMUTINGMUTINGMUTING
MUTING
CONTROL
SWITCH
AUDIO
SELECTOR
INVERTER
T.L
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
T.R
L.O
R.O
LS
RS
SB
R
L
R
L
FRONT
R
L
SURROUND
CENTER
SUB WOOFER
MULTI CH IN
(Page 21)
(Page 33)
(Page 32)
(Page 22)

Table of Contents

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Preview: Operating Instructions
Operating Instructions64 pages

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Sony STR-DB780 Specifications

General IconGeneral
TypeStereo Receiver
Total Harmonic Distortion0.09 %
Digital inputs2 Optical, 1 Coaxial
Weight10.5 kg
Video inputscomposite
Video outputs1 composite, 1 S-Video
Output Power100 Watts (8 Ohms, 20 Hz - 20 kHz, 0.09% THD)
Signal-to-Noise Ratio96 dB (Line in)
Input Sensitivity150 mV (Line in)

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