Schematic Diagram − Main Board (1/3) - Sony STR-DB798 Service Manual

6-24. SCHEMATIC DIAGRAM – MAIN BOARD (1/3) –
(1/3)
CN402
20P
STOP STOP
PW-RY PW-RY
SUB.T SUB.T
-15V
+15V
TUNER-R
TUNER-L
GND
F-R F-R
GND
F-L F-L CLK
C C CL
SW SW
(Page 24)
SR SR
SL SL
SBR SBR
SBL SBL
SOURCE-R
NC
R455
2.2k
SOURCE-L
R405
CN404 2.2k
20P
SOURSE-L
R701
22k
GND
SOURSE-R
GND
SL SL
GND
2SC3623A
SR SR
MUTING
GND
SW SW
C705
0.022
GND
C C
GND
(Page 35)
FRONT-L F-L
GND
FRONT-R F-R
GND
TUNER-L
GND
TUNER-R
GND
CN406
10P
VIDEO-L
GND
VIDEO-R
+15V
-15V
FUN-LAT F-LAT
CLK CL
(Page 29)
DATA DA
TUNER-L
TUNER-R
CN403
20P
+5V(D)
GND
DATA DATA
CLK CLK
FUNC-LAT R827 1k FUNC-LAT
FUN LAT SW FUN LAT SW
S-MUTE
V-SW4 SW4
V-SW3 SW3
V-SW2 SW2
V-SW1 SW1
LIMITER
PROTECTOR PRO
(Page 25)
C/SB-RY D818 1SS133
SW-RY D820 1SS133
SUR-RY D816 1SS133 SUR
SP-B-RY D812 1SS133 SP
FR-RY D819 1SS133 FR
HP-RY HP
DETECT
SUB.T SUB.T
R820
2.2k
PW-RY PW-RY
STOP STOP
R821
10k
GND(RY)
+24V(RY)
(Page 49)
CN414
5P
• Semiconductor Location
Ref. No. Location Ref. No. Location Ref. No. Location
D411 D-13 D631 L-8 D814
D431 J-15 D661 B-13 D815
D461 D-13 D681 L-6 D816
D481 J-12 D711 B-14 D817
D511 E-13 D731 L-10 D818
D531 K-3 D805 I-14 D819
D561 E-13 D807 I-14 D820
D581 K-2 D808 I-14 D821
D611 B-14 D812 F-2 D822
STR-DB798
• See page 53 for IC Block Diagrams.
LEVEL SHIFT
Q810 IC805
DTA124ESATP TC74ACT08P
INVERTER
LEVEL SHIFT
CLK
IC804
TC74ACT08P
R830
1k
FUNC-LAT FUN LAT SW
F-LAT
DATA
DA
R815 R811
10k 10k
R651 R501 R551 R751 R601 R401
22k 22k 22k 22k 22k 22k
Q701 Q651 Q501 Q551 Q751 Q601 Q401
2SC3623A 2SC3623A 2SC3623A 2SC3623A 2SC3623A 2SC3623A
MUTING MUTING MUTING MUTING MUTING MUTING
C604 C505 C555 C655 C605 C405
0.022 0.022 0.022 0.022 0.022 0.022
Q813
DTA124EASTP
MUTING CONTROL
C824 R833
0.1 1M
R826
1M
R782
100k
C753
100
25V
C456
100
R457
25V
1k
C468
220
Q826 C457
16V
2SC1740TP 220p
-FEK
C813
RELAY
R458 2200p
DRIVE 100k
R839
10k R403 C821
100k 0.01
BUFFER
IC402
M5218AP C402
220p C812
2200p
IC401
R838
CXD9725M
2.2k
ELECTRICAL
VOLUME
Q811
2SC1740TP
R402 C401
-FEK
1k 100 25V
RELAY
DRIVE
(Page 38)
Ref. No. Location Ref. No. Location
G-13 D823 C-13 IC652 I-7
I-3 IC804 F-5
F-2 IC401 G-11 IC805 F-4
I-14 IC402 G-10 IC954 E-8
F-2 IC501 I-5 IC955 D-9
F-2 IC502 I-4
F-2 IC601 I-11 Q401 D-5
B-13 IC602 I-10 Q402 O-17
B-13 IC651 I-8 Q403 O-18
R841
33
C817
47
35V
R846
33
R552
1k
FUNC-LAT
AA1
R553
100k
DATA
AA2
C552
220p
AA3
BUFFER
C502
IC502 220p
ELECTRICAL
M5218AP
VOLUME
C816 R503
0.1 100k
IC501
CXD9725M
R451
22k
Q451
2SC3623A
C501
MUTING
R502
1k
C455
0.022
R702 1k C701
R703
100k
ELECTRICAL
C702 VOLUME
BUFFER
220p
IC652
M5218AP
IC651
CXD9725M
C652
220p
R653
100k
C651
R652 1k
R753
100k
FNT-R
C752
220p
ELECTRICAL
VOLUME
BUFFER
C602
IC602 220p IC601
M5218AP CXD9725M
R603
100k
FNT-L
R404 1k
C418 C419
220 16V 1000p
Ref. No. Location Ref. No. Location Ref. No. Location
Q431 O-17 Q483 M-13 Q551 C-5
Q432 M-15 Q484 M-14 Q552 B-2
Q433 M-16 Q501 C-5 Q553 B-3
Q434 M-17 Q502 O-5 Q581 B-3
Q451 E-5 Q503 O-6 Q582 K-2
Q452 O-14 Q531 O-5 Q583 L-2
Q453 O-15 Q532 M-4 Q584 M-3
Q481 O-15 Q533 M-4 Q601 D-5
Q482 M-13 Q534 L-5 Q602 O-9
37 37
C818
22
50V
Q824
2SC1815YGR R828
4.7k
+5V
C819
REGULATOR
22
C814 C815 50V F-LAT FUN-LAT
D815
47 47
HZS6B2
25V 25V CL
DA
C568
C551
220
100 25V
16V FNT-L FRONT-L
S-R
FNT-R FRONT-R
CC
SSW
S-L
S-R
+15V REGULATOR
IC955
7815L
O I
G
S-L
C963 +15V
C962
1000
0.22
25V
C518 C961 -15V
R504 C960
220 1000
1k 0.22
16V 25V
100 25V
G
O I
C718 220 16V
IC954
79015
100 25V
-15V REGULATOR
100 25V
C669 R654
1000p 1k
C668 220 16V
C768 C751
220 100
R752 1k 16V 25V SSW
C618 CC
220
16V R604 1k
C619 1000p
R602 1k C601 100 25V
Ref. No. Location Ref. No. Location Ref. No. Location
Q603 O-11 Q682 M-6 Q734
Q631 O-10 Q683 M-7 Q751
Q632 M-8 Q684 M-7 Q802
Q633 M-9 Q701 B-7 Q803
Q634 M-9 Q702 O-12 Q805
Q651 C-5 Q703 O-13 Q807
Q652 O-7 Q731 O-12 Q808
Q653 O-8 Q732 M-10 Q809
Q681 O-8 Q733 M-11 Q810
STR-DB798
CN405
20P
+15V
-15V
GND
CLK
DATA
NC
GND
GND
GND
C (Page 35)
GND
SW
GND
SL
GND
SR
CN420
3P
(Page 49)
B1
B2
B3
B4
(Page 39)
B5
B6
B7
B8
Ref. No. Location
M-12 Q811 B-17
D-5 Q813 H-2
I-13 Q822 B-13
I-14 Q823 B-10
I-15 Q824 I-2
B-10 Q826 B-17
C-11
C-12
G-5