Sharp 21KF-80S - Page 21

21
21KF-80S
SOUND
TRAP
TUNERAGC
+8V
HOUT V-DRIVE
RO GO B0
BCLIN
BLKIN
CVBS/Y
IFIN
AUDOUT
AUDEXT
Fig. 1 Block diagram TDA935X/6X8X PS/N2 with mono intercarrier sound demodulator
CHROMA
SDASCL
VISION IF
ALIGNMENT-FREE
PLL DEMOD.
AGC/AFC
VIDEO AMP.
VIDEO SWITCH
VIDEO IDENT.
VIDEO FILTERS
PAL/SECAM/NTSC
DECODER
DEEMPHASIS
AUDIO SWITCH
(AVL)
VOLUME CONTROL
BASE-BAND
DELAY LINE
H/V SYNC SEP.
H-OSC. + PLL
H-DRIVE
2
nd
LOOP
H-SHIFT
V-DRIVE +
CONTR/BRIGHTN
OSD/TEXT INSERT
CCC
WHITE-P. ADJ.
80C51 CPU
I
2
C-BUS
TRANSCEIVER
ROM/RAM
TELETEXT
ACQUISITION
1/10 PAGE MEMORY
TELETEXT/OSD
DISPLAY
RG
B
BL
Y U V
H
V
REF
ENHANCED
VST PWM-DAC
VST OUT
I/O PORTS
I/O PORTS (4x)
+3.3 V
RESET
LED OUT (2x)
ADC IN (4x)
VPE
(EW GEOMETRY)
GEOMETRY
EHTO
EWD
R/V
G/Y B/U BL
RGB/YUV INSERT
R
GB
REF
CVBS
SYNC
H
V
COR
27 37 38
33
(20)
29 28
34
44
60 55 59 58 57
10/11
2
34
5-8
1+62-64
9
12
54 56
61
51 52 53
49 50
45
484746
(20)
36
21
222625
16
35
17
31
15
19
14
39 18
41
(32) 13
43
42
40 24
23
RGB/YUV MATRIX
SATURATION
YUV/RGB MATRIX
30
LUMA DELAY
PEAKING
BLACK STRETCH
AGC CIRCUIT
NARROW BAND
PLL
DEMODULATOR
(32)
(32)
SNDIF
TDA9350 (IC801)
Block Diagram