Program Diagram - Haier TV-8888-42 Service Manual

PROGRAM DIAGRAM

• Features
The HTN19R12 color TV set(s) (designed for the US market) incorporate the
monolithic integrated circuit LA76814K developed by SANYO in 1999 and the CPU
LC863432B-535A designed for LA76814K control.
LA76814K intergrates the sound accompany filter and trap filter in the chip,
resulting in minimized application of peripheric components, maximized integtration
and reliable performance.
The chip functions for picture intermediate frequency amplification, picture
detection, sound intermediate frequency amplification, sound frequency
discrimination, video amplification, choma decoding, line and field synchronized
scanning wave formation and output.
The circuits of picture detection, sound frequency discrimination and chroma
decoding incorporate PLL demodulation which is noted for significant stability and
reliability. In addition, this chip integrates the brightness and chroma retarding lines
and additional functions of black level extension, bus geometric figure adjustment,
2
I C bu control on the basis of the 7687, resulting in test point free assembly,
reduced components of test point and peripheric components and improved picture
quality.
The CPU LC863424 uses SANYO LC863432B-535A series for reprogramming. In the
design, functions of CCD and V-CHIP as well as various function extensions are
added for the North American market. This chip also uses low frequency 32.7KHZ
crystal oscillator to reduce interferences to pictures and medium frequency signals.
• Technical properties and requirements
1. Main performance index
1. Screen diagonal:
2. Receiving system:
3. Receiving channel:
4. Antenna input:
5. Picture limit noise sensibility:
6. Color sensitivity:
7. Two signal selectivity:
8. Sound noise limit sensitivity:
9. Sound output power:
10. X-ray radiation value:
11. Voltage:
12. Energy consumption:
1~125
UHF≤54dBμV
≤70W
20 inch
NTSC-M
VHF-channel 2~13
UHF-channel 14~49
75ΩF plug
VHF≤51dBμV
≤40dB（μV
-1.5MHZ≥45dB
+6MHZ≥50dB
VHF≤39dBμV
UHF≤42dBμV
≥2W
<0.1mR/Hr
AC 100 -130V
CATV-channel
17