Sony STR-DB795 Service Manual ▷ View online
STR-DB795
18
18
STR-DB795
6-2. BLOCK DIAGRAM – AUDIO DSP Section –
: AUDIO (ANALOG)
: AUDIO (DIGITAL)
VIDEO
ANALOG
F
BCKO,
LRCKO
G
S MUTE
H
SCLKO
LRCKO
BCKO
4
DIGITAL
CONTROL
DATA
DEMODULATOR
LOCK
DETECT
TIMING
MICON INTERFACE
CLOCK
INPUT
CIRCUIT
IC1102
IC1151
J1101
J202
VIDEO 2 OUT
DVD IN
TV/SAT IN
L
L
L
VIDEO 2 IN
J1091 (2/2)
L
J201
L
L
L
DIGITAL AUDIO INTERFACE RECEIVER
IC1101
CLK
LAT
DATA
VIDEO SELECTOR
IC201
4
5
7
8
3
2
10
12
14
15
16
6
5
14
2
3
7
36 38 37
35
47
CKSEK1
DI
CE
CLK
DO
48
CKSEL1
B
A
DI
CLK
CE
DO
XMODE
XMODE
3
DIN0
16
DATAO
34
ERROR
14
BCK
15
LRCK
17
XSTATE
21
XOUT
22
XIN
24
AUDIO
X1101
12.288MHz
D1601
HDIN
HCLK
67
DIR ERROR
ANALOG_DIGITAL
121
104
103
69 OPT SEL2
91 ADC:RST
70 OPT SEL1
74 CKSEL1
79 DI
75 CLK
76 CE
80 DO
73 XMODE
90
DSP_HACN
107
PM
89
DSP_HCS
102
HDOUT
88
DSP GP9
105
GP12
72
DATA0
71
XSTATE
A
B
CKSEL1
DI
CLK
CE
DO
XMODE
SYSTEM CONTROLLER
IC1703 (2/6)
18 SDI1
30 SDI2
SDCLK
69
GP8
68
GP9
36
HCS
34
HCLK
33
HDIN
35
HDOUT
32
HACN
113
PM
106
XRST
2
XRST
22
KFSIO
37
AUDIO DIGITAL
SIGNAL PROCESSOR
IC1201
23
SDO1
24
SDO2
25
SDO3
19
LRCKO
20
BCKO
• SIGNAL PATH
• R-CH is omitted due to same as L-CH.
A
B
VIDEO 1 IN
VIDEO 1 OUT
VIDEO 3
INPUT
AUDIO
DIGITAL OPTICAL
RECEIVER
IC1104
DIGITAL OPTICAL
RECEIVER
IC1105
DIGITAL OPTICAL
RECEIVER
IC1106
OPTICAL
DVD IN
COAXIAL IN
DVD
COAXIAL IN
SA-CD/CD
DIGITAL OPTICAL
RECEIVER
IC1081
VIDEO 3
INPUT
DIGITAL
OPTICAL
OPTICAL
TV/SAT IN
OPTICAL
MD IN
OPTICAL
MD OUT
DIGITAL OPTICAL
TRANSCEIVER
IC1107
DIGITAL SELECTOR
IC1103
28 LRCKI2
15 LRCKI1
29 BCKI2
17 BCKI1
59 EXLOCK
MUTING
SWITCH
SWITCH
Q1602
MUTING
SWITCH
SWITCH
Q1601, 1603
4
DIN1
5
DIN2
2
DOUT
9
MCLK1
12
MCLK2
X1201
13.9MHz
EEPROM
IC1604
5
112
6
111
SDA
SCL
EEPROM SDA
EEPROM SCL
58
X0
57
X1
X1601
16.5MHz
108, 107, 105 – 102,
99, 98, 80 – 77,
75 – 72
112, 110, 109,
97 – 92, 82 – 85,
66 – 64
7 – 10, 13 – 16,
29 – 32, 35 – 38
5 – 1, 44 – 42,
27 – 24, 21 – 18
S-RAM
IC1202
IC1202
6
17
CS
WE
44
45
CSO
WEO
D0 – D15
A0 – A15
D0 – D15
A0 – A15
67
GP10
SIGNAL-END
DEFERENTIAL
CONVERTER
DIGITAL
MODULATOR
SERIAL I/O
INTERFACE
CLOCK/
TIMING CONTROL RESET
/POWER CONTROL
A/D CONVERTER
IC1401
15
14
BCK
16
SYSCLK
1
DOUT
LIN
6
RSTB
13
LRCK
BUFFER
IC1402
20
XMCK
C
DATA, CLK, LAT
82
LRCK SW
85
DSP_BST
56
BST
6
2
5
1
SIGNAL
SELECTOR
IC1204
D1101
SDO3
E
SDO1, SDO2,
SDO3, SDO4
D
SOURCE-L
SDO2
26
SDO4
SDO4
SDO1
SWITCHING
IC1503
13
CKOUT
(Page 21)
(Page 19)
(Page 19)
(Page 19)
(Page 19)
(Page 19)
STR-DB795
19
19
STR-DB795
6-3. BLOCK DIAGRAM – AUDIO CONTROL Section –
BUFFER
IC602 (2/2)
+
MODE CONTROL
INTERFACE
SERIAL INPUT
INTERFACE
MULT-FUNCTION
X8 OVER SAMPLING
DIGITAL FILTER
D/A
CONVERTER
LPF
AMP
LPF
AMP
LPF
AMP
LPF
AMP
MUTING
Q751
MUTING
Q601
MUTING
Q501
MUTING
Q401
MUTING
Q701
E
SDO1,
SDO2,
SDO3,
SDO4
SDO2,
SDO3,
SDO4
F
BCKO,
LRCKO
LRCKO
G
S MUTE
TRIM
LEVEL SHIFT
CIRCUIT
CENTER
SUB WOOFER
P
DATA, CLK, LAT
DATA, CLK, LAT
J
FL
LEVEL SHIFT
CIRCUIT
L
SL
M
SBL
N
SB (R)
R
SW
LEVEL SHIFT
CIRCUIT
K
C
J101
45
46
47
40
41
DATA1
DATA2
DATA3
BCK
LRCK
BCKO
LRCKO
SCKI
SDO1
SDO3
SDO2
SDO4
SDO2
SDO4
34
MDI
35
MC
36
ML
37
RST
33
MDO
ML
RST
MDO
14
10
12
11
VOUT1
VOUT5
VOUT3
VOUT4
2 DATA
3 LRK
16 SCK
15
ML
14
MC
13
MD
7
VO L
D/A
CONVERTER
IC1502
LRCKO
1 BCK
BCKO
AUDIO SELECTOR
IC101
9
5.1FL
12 5.1SL
28 5.1 C
15 5.1SW
2
PHONO
3
MD IN
4
MD OUT
5
CD
24
COUT
11
FLOUT
19
SWOUT
10
13 D/ASL
14
SLOUT
22
DATA
21
CLK
23
LAT
26 D/A C
17 D/ASW
20
VRIN
23
OUT
25
24
TRIM
13
CLK
17
LAT
16
DATA
CLK
LAT
DATA
CLK
LAT
DATA
20
VRIN
23
OUT
25
TRIM
24
TRIM
13
CLK
17
LAT
16
DATA
9
VRIN
6
OUT
4
TRIM
5
TRIM
CLK
LAT
DATA
13
CLK
17
LAT
16
DATA
CLK
LAT
DATA
20
VRIN
23
25
24
OUT
TRIM
TRIM
108 DA1DO
93 DA1LAT
92 DAC_RST
95 DAC_MDI
94 DACCLK
96 DA2LAT
81 GROUP SW
MDO
ML
RST
MDI
MCI
6
CTR/SW RY
SYSTEM CONTROLLER
IC1703 (3/6)
DATA
CLK
LAT
MDI
MCI
FRONT
L
SURR
L
B
TUNER-L
H
SCLKO
6
TUNER
D
SOURCE-L
7
A/D, V
8
2CH
BUFFER
IC1521
BUFFER
IC1561
BUFFER
IC1541 (1/2)
BUFFER
IC1541 (2/2)
9
VOUT6
13
VOUT2
R-CH
R-CH
D/AFL
LINE AMP
IC1581 (2/2)
MUTING
Q651
8
VO R
LINE AMP
IC1581 (1/2)
BUFFER
IC602 (1/2)
BUFFER
IC502
ELECTRICAL
VOLUME
IC401
AUDIO SELECTOR
IC173
ELECTRICAL
VOLUME
IC601
BUFFER
IC652 (2/2)
LEVEL SHIFT
CIRCUIT
20
VRIN
23
OUT
25
TRIM
24
TRIM
13
CLK
17
LAT
16
DATA
9
VRIN
6
OUT
4
TRIM
5
TRIM
CLK
LAT
DATA
BUFFER
IC652 (1/2)
ELECTRICAL
VOLUME
IC651
ELECTRICAL
VOLUME
IC501
D/A CONVERTER
IC1501
LINE AMP
IC112
LINE AMP
IC111 (1/2)
LINE AMP
IC111 (2/2)
22
27
26
25
19
21
17
23
BUFFER
IC171
LINE AMP
IC110
CONTROL
14
15
16
6
2
5
DATA
SELECTOR
IC1504
1
38
J151
PHONO IN
L
L
SA-CD/CD IN
J131
MD/TAPE IN
L
L
MD/TAPE OUT
PHONO
EQ AMP
IC131
BUFFER
IC402
J203
SUB WOOFER
RY807
Q
RELAY
DRIVE
Q826
• SIGNAL PATH
• R-CH is omitted due to same as L-CH.
: TUNER
: AUDIO (ANALOG)
: AUDIO (DIGITAL)
MUTING
CONTROL
Q813
ANALOG
MULTI CH IN
ANALOG
(Page 17)
(Page 18)
(Page 18)
(Page 18)
(Page 18)
(Page 18)
(Page 20)
(Page 20)
(Page 20)
(Page 20)
(Page 20)
(Page 20)
(Page 21)
(Page 21)
STR-DB795
20
20
STR-DB795
6-4. BLOCK DIAGRAM – AUDIO AMP Section –
: AUDIO (ANALOG)
TM449 (2/2)
+
+
–
–
TM444
BIAS
Q431, 434
BOOSTER
Q402
BOOSTER
Q403
J
FL
SYSTEM CONTROLLER
IC1703(4/6)
CURRENT
DETECT
Q432, 433
CURRENT
DETECT
Q632, 633
CURRENT
DETECT
Q732, 733
5
41
134
3
2
7
118
SURR.RY
HP DETECT
LIMITTER.IN
SP.A.RY
4
SP B RY
H/P RY
SB.RY
PROTECTOR
RELAY
DRIVE
Q823
RY806
R-CH
RELAY
DRIVE
Q809
RY449
RELAY
DRIVE
Q811
RY699
RELAY
DRIVE
Q807
RY549
D820
D818
PHONES
CENTER
L
R
J1086
+
+
–
–
TM699
–
–
+
+
R-CH
R-CH
SURR
L
R
SURR
BACK
L
R
RY649
D812
D819
D816
AF POWER
PROTECTOR
Q802, 803,
Q805
–1
RELAY
DRIVE
Q808
RY444
L
R
+
+
–
–
TM449 (1/2)
R-CH
FRONT A
FRONT B
RV431
BIAS
PRE DRIVE
Q2001, 2003
BIAS
Q2004, 2005
BIAS
Q2006
BIAS
Q531, 534
BOOSTER
Q502
BOOSTER
Q503
L
SL
RV531
BIAS
PRE DRIVE
Q2401, 2403
BIAS
Q2404, 2405
BIAS
Q2406
BIAS
Q631, 634
BOOSTER
Q602
BOOSTER
Q603
K
C
RV631
BIAS
PRE DRIVE
Q2201, 2203
BIAS
Q2204, 2205
BIAS
Q2206
BIAS
Q731, 734
BOOSTER
Q702
BOOSTER
Q703
M
SBL
RV731
BIAS
PRE DRIVE
Q2701, 2703
BIAS
Q2704, 2705
BIAS
Q2706
+
–
–2
BIAS
Q681, 684
BOOSTER
Q652
BOOSTER
Q653
N
SB (R)
RV681
BIAS
PRE DRIVE
Q2301, 2303
BIAS
Q2304, 2305
BIAS
Q2306
D411
D611
D711
CURRENT
DETECT
Q682, 683
D661
D511
R
SW
• SIGNAL PATH
• R-CH is omitted due to same as L-CH.
CURRENT
DETECT
Q532, 533
SPEAKERS
IMPEDANCE
USE 4-16
Ω
+
OVER VOLTAGE
DETECT
Q822
B+
(Page 19)
(Page 19)
(Page 19)
(Page 19)
(Page 19)
(Page 19)
STR-DB795
21
21
STR-DB795
6-5. BLOCK DIAGRAM – DISPLAY/KEY CONTROL Section –
REMOTE
CONTROL
RECEIVER
IC1051
I/O BUFFER
Q1607
D1603
CONTROL A1
II
J2305
Q810
S1050
S1057
42 – 31
FL1603
FLUORESCENT
INDICATOR
TUBE
F1
F2
SEG1 – SEG16
GRID1 – GRID12
S1041 – 1047
S1051 – 1054,
S1056, 1061,
S1062, 1065
SYSTEM CONTROLLER
IC1703 (5/6)
133
AD2
63 SIRCS
15
FL DATA
14
FL CLK
113
FL STB
62
POWER.ON/OFF
132
AD1
86 CONTROL.A1.IN
21 VOL IC/TUNER DATA
22 VOL IC/TUNER CLK
23 VOL LAT
120 FUNCTION.SW.LAT
87 CONTROL.A1.OUT
7
DIN
8
CLK
9
STB
A
DATA, CLK
Q
DATA, CLK, LAT
P
DATA, CLK, LAT
C
DATA, CLK, LAT
DATA
CLK
LAT
DATA
CLK
LAT
DATA
CLK
LEVEL SHIFT
IC1006
I
/ 1
20
SP SW
SPEAKERS
13
VOL.JOG (1A)
12
VOL.JOG (1B)
19
+/–.JOG (3A)
18
+/–.JOG (3B)
17
+/–.JOG (4A)
16
+/–.JOG (4B)
MASTER
VOLUME
VOLUME
INPUT
SELECTOR
ROTARY
ENCODER
RV1051
ROTARY
ENCODER
RV1052
MENU
–/+
11
FUNCTION.JOG (2A)
10
FUNCTION.JOG (2B)
ROTARY
ENCODER
RV1061
ROTARY
ENCODER
RV1060
FLUORESCENT INDICATOR TUBE DRIVER
IC1001
9
10
2
1
13
12
8
3
11
LEVEL SHIFT
IC804
9
10
2
1
13
12
5
4
8
3
11
6
LEVEL SHIFT
IC805
14 – 29
D1031
MULTI CHANNEL DECODING
D+5V
2
LED2
1
LED1
LED DRIVE
Q1032
DIMMER
CONTROL SWITCH
Q1031
D+5V
(Page 17)
(Page 18)
(Page 19)
(Page 19)
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