Daewoo DDT-21H9ZZF, Service Manual

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Service Manual CP-099F
4 - IC description
4-1 VCT383XA TV signal processor - Teletext decoder with embedded 8 bit - Controller.
4-1-1- Block diagram of the VCT
4-1-2- TV-signal Processor
Four composite video inputs, two S-VHS inputs
Analogue YC r C b input
Composite video monitor
Multistandard colour decoder ( 1 crystal )
Multistandard sync decoder
Black-line detector
Adaptive 2H comb filter Y/C separator
16 kB
Text RAM
3 kB
OSD RAM
TPU
DMA CPU
1 kB Reset
Audio
Video
Back-end
Pict.Improv
Display
Processor
Panorama
Scaler Color
Decoder Video
Front-end
Comb
Filter
Logic
Clock
Oscillator
CPU RAM
96 kB
CPU ROM
24 kB ROM
31
12
CLK20
XTAL2
XTAL1
TEST
RESQ
MSync
BE
RDY
Color, Prio
VSync 8
AOUT
AIN
3
2
2
4
3
2 2 2
GNDAB
VSUPAB
RGBIN
SVM
RGBOUT
XREF VRD GNDM RSW SENSE HFLB HOUT PROT EW VER
T
GNDD VSUPD GNDAF VSUP
A
F
SGND VR
T
VIN
3
4
CIN
VOUT
V
ideo
I 2 C
I 2 C
I 2 C Mmaster
8-bit PWM
14-bit PWM
15:1 Mux
10-bit ADC
2 Timer
2 CapCom
Watchdog
24 IO Ports
ADB, DB, CB
VSUPS
GNDS
VSUPP1
Pxy
GNDP1
VCT 38xx