akira LCT-20CHST, Service Manual

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Model No.: LCT-20CHST
Version: 1.0
MST518 inner diagraph
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b. TDA15021H introduction:
The third-generator super integrated circuit UOC III which designed by Philips company
recently integrates with video decode, 2D comb filter, high quality audio transacting
technique, suitable with the European teletext technique and suitable with US closed caption
and V-chip function compatible with single series IC. The series of UOC III have high
integrity, besides completing the Processing of all small signals (IF signal demodulation,
video decode, H/V signal, sound DSP), and integrate all the MCU function. It has many
Advantages, example: the compact circuit, good performance, simple craft and etc. It
matched with company’s high performance price ratio and high product efficiency
demanding. It is suitable for 4:3 or 16:9, 50/60HZ and A100/120HZ TV system, the main
characteristic below:
Multi-system IF demodulation 、 analog video decode
Comb filter internal
NICAM, stereo auto identify and decode
SCART input channel source auto identify (RGB, CVBS), SCART image input format
identify (4:3, 16: 9)
Support 4:3, 16:9 display format
TOP/FLOF TELETEXT (10 page) receive display
Channel auto install ACI function (can preset)
4 CVBS or 3 Y/C input, 1 CVBS output, 2 YcrCb/2 RGB input
4 AV audio input, 1 AV adjustable audio volume output
Volume auto level control circuit
Global FM demodulation
Picture quality enhancement of dynamic peak value control, skin color correct, Gamma
correct, Black level extension.