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Chapter 2 - Brief introduction of the main integrated circuit
1、LS16 and LS16W Chassis Main ICs and function：
Main Board
Number Position
1
U12,U6
2
U23
3
U7
4
U9
5
U8
6
U22
7
U24
8
U28,U29,U30
9
U31
10
U32
2、LS16 and LS16W Chassis IC function.
2.1 TUNER(DTVS205CH201A)
GENERAL DESCRIPTION:
Receiving System: ATSC/NTSC system
Intermediate Frequency: Digital(center): 44MHz
Input Impedance: 75Ω,Unbalanced
IF Output Impedance: 10Ω,Balanced
Band Change-Over System: PLL system
Tuning System: PLL system
Internal RF AGC function:
Built in wideband AGC detector with 6 programmable take-over points
Narrow band output to be filtering by a 5.6MHz SAW filter
Built in the additional IF amplifier with AGC circuit
Reference Frequency The X-tal the RF block's PLL:4MHz
Control Data Bus: I²C (BUS VOLTAGE:3.3V)
Control Data Format: Refer to 6 Section
DTVS205CH201A BLOCK DIAGRAM
function
Part Number
24LC02
24LC512
MSD809
MST3383AMCK-LF-170 HDMI Decoder
DTVS205CH201A
MSD116L
M25P16-VMN6P/
S25FL016A0LMFI013
IS42S16400D-6TL/
W9864G6GH-6/
K4S641632K-UC60
TDA1517P
TL062CD
Analog(P-carrier):45.75MHz
：
Main function
EEPROM
EEPROM
Demodulator
Tuner
Video and audio processor.
Flash for code storage
SDRAM
Audio amplifier
Integration amplifier
6
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