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CHAPTER TWO MAIN ICs FUNCTION INTRODUCTION
GENERAL INTRODUCTION:
TV Board
Number Location
Type
Main
Function
1
UT1
TMI4-C22P2RW
Audio and image intermediate frequency signal
output
2
UT2
TAD5-C2IP1RW
Sub picture CVBS signal output
Main Board
3
U302
,
U303
24LC21A T/SN
EEPROM
4 U701
24LC32A
T/SN Buffer
5
U306,U307,UA3 FSAV330QSCX
Switch selection
6 K201
K7262N
Audio
surface filter
7
K202
K9352N
Audio surface filter
8 U6
TPA3002D2PHPR
Audio
amplifier
9 U801
AM29LV800DT-70EC
Flash
,
control program inside
10 U700
GM1501-BD
Video
processor
11 U201
TDA15063H-N1B06557 AV
decoder
12
U402
SAA7115HL/V1
Sub channel video decoder
13
U305
SM5302AS-G-ET
High definition signal filter
14 U400
TDA8759HV/8/C1 Video
signal modulus transformer
15
U5
TDA9178T/N1
Video signal picture amendment
16 U600
MT46V2M32LG-4
Frame buffer
.ICs FUNCTION INTRODUCTION IN DETAILS
Main Tuner (TMI4-C22P2RW)
Pin Definition
Description
1
AGC
Auto gain control
2 UT
NC
3 ADD
Ground
4
SCL
IIC bus (Clock)
5
SDA
IIC bus (Data)
6 NC
NC
7
+5V
Power supply
8 NC
NC
9
30V
To produce 0~30V tune voltage
10 NC NC
11
IF
Intermediate frequency TV signal
Intermediate frequency TV signal
Sub Tuner (TAD5-C2IP1RW):
Pin Definition
Description
1
AGC
Auto gain control
2 NC
NC