Sony STR-DB780 Service Manual

45
STR-DA1ES/DB780
• IC Block Diagrams
IC111 TC9274N-016 (MAIN board)
1
2
3
4
5
6
7
8
9
10
11
12
20
21
42
40
40
39
38
37
36
35
34
33
32
31
23
22
VSS
S1
S2
S3
S4
S5
S6
S7
S8
S9
S10
S11
S1
S2
S3
S4
S5
S6
S7
S8
S9
S10
S11
GND
CK
VDD
STB
DATA
18BIT
LATCH
CIRCUIT
(R-CH)
18BIT
LATCH
CIRCUIT
(L-CH)
LEVEL SHIFT & SHIFT REGISTER
13S12 30 S12
14S13 29 S13
15S14 28 S14
16S15 27 S15
17S16 26 S16
19S18 24 S18
18S17 25 S17
IC151 TC9273N-004 (MAIN Board)
IC201 TC9273N-014 (VIDEO.AU Board)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
28
27
26
25
24
23
22
21
20
19
18
17
16
15
VSS
S1
S2
S3
S4
S5
S6
S7
S8
S9
S10
S11
S1
S2
S3
S4
S5
S6
S7
S8
S9
S10
S11
GND
CK
VDD
STB
DATA
10BIT
LATCH
CIRCUIT
(R-CH)
10BIT
LATCH
CIRCUIT
(L-CH)
LEVEL SHIFT & SHIFT REGISTER
IC301 NJM2581D (VIDEO Board
(EXCEPT STR-DB780: AEP and UK models))
BIAS
6dB
AMP
7.5Ω
DRIVER
1
13
BIAS
REF
6dB
AMP
7.5Ω
DRIVER
5 9
2
12
4
10
6
8
7
VIN 1
VEE 1
VOUT 1
V+2
VEE 2
VIN 3
V+3
VEE 3
VOUT 3
POWER SAVE
GND
14 V+1
BIAS
6dB
AMP
7.5Ω
DRIVER
3
11
VIN 2
VOUT 2
IC303 TC74HC4053AP (VIDEO Board
(EXCEPT STR-DB780: AEP and UK models))
16 15 14 13 12 11 10 9
1 2 3 4 5 6 7 8
C
B
A
OX
IX
X-COM
Y-COM
VCC
GND
VEE
INH
OZ
Z-COM
IZ
OY
IY
C
OUT
IN
C
OUT
IN
C
OUT
IN
C
OUT
IN
C
OUT
IN
C
OUT
IN
LOGIC LEVEL CONVERTOR

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)