Durabrand DCT3203 Service Manual page 24

IF/Video Block Diagram
RF/IF SIGNAL
TU1
SF1
SAW
IF 11
FILTER
AGC 1
SCL 4
SDA 5
EXT.CLK 8
WF16
JK721
VIDEO-IN
(FRONT)
JK701
VIDEO-IN
(REAR)
Q951
JK711
S-VIDEO-IN
Q956
C Y
6-3
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VIDEO SIGNAL AUDIO SIGNAL
IC33
(IF SIGNAL PROCESS)
CF31
20
VIF VIDEO 4.5MHz
5
AMP DET TRAP
21
CF32
VCO
4.5MHz
FILTER
RF
17
AGC
IF AGC DET
AFT
AMP
14
IC333
TV MICON/VIDEO
WF2
/AUDIO/CHROMA
/DEFLECTION
11 14
58 SCL
56 SDA
32
26
24
20
LPF
29
30
OSD
61 S-SW
WF1
EQ
3
AMP
SIF
8
AMP
VCO F/B
LPF
VCXO
LUMINANCE
PROCESS
CIRCUIT
RGB MATRIX
/COLOR CONT
CHROMINANCE
PROCESS
CIRCUIT
CHROMA COMB
BASEBAND TINT
H-SYNC
PROCESS
CIRCUIT
V-SYNC
PROCESS
CIRCUIT
MAIN CBA
1
10
7
Q33
22
16
Q21
16
OSD SW RGB DRIVE
CONTRAST /CUT OFF
52
BRIGHTNESS /H.V. BLK
51
50
53
46
45
38
37
6-4
TO
SIF
AUDIO BLOCK
FROM/TO
INPUT0
SYSTEM
AGC
CONTROL
BLOCK
X301
3.58MHz
WH301A
5 BLUE
TO
4 GREEN
CRT/H.V. BLOCK
3 RED
WH301B
ACL
H-DRIVE
FROM/TO
FBP
CRT/H.V. BLOCK
RAMP-OUT
V-RAMP-F/B
L6655BLIF