Symphonic DWT1304 - Block Diagrams

1-1
BLOCK DIAGRAMS
IF/Video/System Control Block Diagram
L2200XBLIF
58
73 75
16
63
56 32
SCL
CF31 CF32
VCO F/B
Q31
AFT AGC-IN EXT-H
PROTECT-2 PROTECT-1 PROTECT-3
P-ON-H
SDA
TUNER LINE
TO CRT/H.V. BLOCK
WH301A
TO CRT/H.V. BLOCK WH301B
BLUE5 GREEN4 RED3
IC111
IC31 (IF SIGNAL PROCESS)
REMOTE SENSOR
KEY SWITCH
CHROMINANCE PROCESS CIRCUIT
LUMINANCE PROCESS CIRCUIT
H-SYNC PROCESS CIRCUIT
V-SYNC PROCESS CIRCUIT
VCXO
OSD
RGB MATRIX /COLOR CONT
OSD SW /CONTRAST /BRIGHTNESS
RGB DRIVE /CUT OFF /H.V. BLK
LPF
14 11
53 46 45 38 37
ACL H-DRIVE FBP
V-DRIVE V-RAMP-F/B
TO AUDIO/POWER CONTROL BLOCK
TO POWER SUPPLY BLOCK TO CRT/H.V. BLOCK
PROTECT-2 PROTECT-1 PROTECT-3 P-ON-H
KEY-IN2 KEY-IN1
RCV-IN
RCV101
JK701 VIDEO-IN
24
X301 3.58MHz
SAW FILTER
VIF AMP
VIDEO DET
VCO
4.5MHz FILTER
LPF
IF AGC DET
EQ AMP
RF AGC AMP
AFT
4.5MHz TRAP
FM DET
AF AMP
16
11 13 18
6
17
4
2 7
1 9
TU1
SF1
IF
AGC
SDA
SCL
EXT.CLK
1
11
5 4
8
IC151 (MEMORY)
SCL
6
SDA
5
14 26
TU-AUDIO
52 51 50
MAIN CBA
VIDEO SIGNALRF/IF SIGNAL
AUDIO SIGNAL
TV MICON/VIDEO /AUDIO/CHROMA /DEFLECTION
67 68 76 79 69 66 70
WF16
WF1
WF6
SCL
SDA
TO AUDIO/POWER CONTROL BLOCK
WF2
PROTECT-2 PROTECT-1
SDA 4 I2C-OPEN 2 SCL 5
CN301(NO CONNECTION)
CN301 is used for adjustment at factory
7
CS
72 I2C-OPEN