Read Sony STR-DB840 / STR-DB940 Service Manual online
12
12
STR-DB840/DB940
4-2.
BLOCK DIAGRAM – MAIN Section (2/2) –
VIDEO SELECT
IC2005
Y SWITCH
IC252
C SWITCH
IC251
VIDEO BUFFER
IC2002
X2002
14MHz
CLOCK
IC2001
IC2001
05
J810-2
(DB940)
J2003
J2002
VCC
VEE
+5V
–5V
SW1
16
8
14
V1 OUT 15
3 TV
7 V3
5 LD
13 V1 IN
1
M OUT
6
SW4
4
SW3
10
SW2
14
SW1
Y
C
V1 OUT 15
3 TV
5 LD
13 V1 IN
1
M OUT
6
SW4
4
SW3
10
SW2
14
SW1
C IN
10
9
8
11
4
Y IN
2
V IN
3
6
C OUT
8
Y OUT
7
V OUT
VBLK 6
26 C OUT
27 Y OUT
25 V OUT
8
10
EXS
HSYNC
VSYNC
TEST
SW2
SW3
SW4
D2003
D2004
VIDEO (SW1)
SYSTEM CONTROLLER
IC1201 (2/2)
VIDEO (SW2)
VIDEO (SW3)
VIDEO (SW4)
10
4
75
76
77
72
6
SW5
M OUT
V3
TV
LD
V2 OUT
V2 IN
V1 OUT
V1 IN3
2
1
7
3
5
11
9
15
13
VIDEO IN
VIDEO IN
VIDEO OUT
VIDEO IN
VIDEO OUT
VIDEO IN
VIDEO
VIDEO 3
INPUT
TV/SAT
S-VIDEO IN
TV/SAT
DVD/LD
J2001
VIDEO OUT
MONITOR
VIDEO 1
VIDEO 2
Y
C
Y
J253-1
Y
C
S-VIDEO
VIDEO 3
INPUT
J809
S-VIDEO IN
DVD/LD
J253-2
S-VIDEO IN
VIDEO 1
J252-1
C
Y
C
S-VIDEO OUT
VIDEO 1
J252-2
SCLK 22
SIN 23
CS 24
OSD VBLK
56
OSD CLK
26
OSD DOUT
28
OSD VSYNC
P/N
55
54
53
2
16
46
57
13
14
OSD LAT
DISPLAY
CONTROLLER
IC102 (2/2)
100
YIN 1
VIN 3
CIN 2
EXHSYN
CNP253
(FOR CHECK)
12
IN
VSYNC
D2002
D2005
IC2008
SYNC
IC2006
SYNC
Q2001, 2002
HSYNC
2
1
4
Y
C
S-VIDEO OUT
MONITOR
J251
OSD DRIVER
IC2004
11 21
IN
VSYNC
HSYNC
2
1
4
X2001
17.34MHz
CLOCK
IC2001
IC2001
12
1
2
8
9
10
13
COMPARATOR
IC2003
7 V3
LPF
LPF
(US,CND)
(EXCEPT US, CND)
3
1
2
6
5
4
FI2001
FI2003
RDS DATA
RDS CLOCK
RDAT
X1
4.332MHz
RCLK
RDS
SIGNAL INPUT
4
MUX
RDS DECODER
IC1
(AEP, UK)
RDS SIGNAL
FM DET OUT
(Page 11)
E
XI
XO
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