Sharp LC-20SD4E Service Manual page 52

A B
8
7
RCA TYPE/VHF+UHF DIGITAL TUNER
TU2801
VA1T1ER2087
14 13
5.0
ANT BB 1
5.0
BB 2
0.3
NC 3 NC
0.3
RF AGC 4 NC
6
0.3
NC 5 NC
5.0
+B2 6
3.3
SCL 7
3.3
SDA 8
30.0
+32V 9
5
0
IFAGC 10
0
IF+ 11
0
IF- 12
16 15
4
R2805
180
W808
W809
3
2
CAUTION
:SINCE THESE PARTS MARKED BY
1
CRITICAL FOR SAFETY,USE ONES
DESCRIBED IN PARTS LIST ONLY
A B
H-37
C
OFDM/ TUNER SCHEMATIC DIAGRAM
VCC SW
Q2803
KTA1664-Y-RTF/P
L2801
5.0 5.0
P5V
2.2uH
NLV25 4.0
R2820
10K
SW
Q2804
KTC3875S_Y_RTK
0
R2822
FEOFF
W804
0.7
1.2K
0
L2803
AT+32V
2.2uH
NLV25
TSCL
TSDA
T3V3D
R2823
TIAGC2
680
C2811
TINP
100P CH
C2812
TINM
100P CH
ARE
ATTENTION
:LES PIECES REPAREES PAR UN
DANGEREUSES AN POINT DE VUE SECURITE
N'UTILISER QUE CELLS DECRITES
DANS LA NOMENCLATURE DES PIECES
C
D E
(DIGITAL PCB)
NC NC NC NC NC
1.7 1.7 0 3.4 3.4 3.4 3.4 0 0 1.8 1.5
48 47 46 45 44 43 42 41 40 39
1.7
NC
1.7
NC CCK/HFEC1
3.4
NC HFEC0
0
VDD33
NR4001
4D02WGJ0103TCE
0
NC NC CS1
0
GND7
17 TEST
0
CS0 33 D1
48 CIQ/HFEC3
0
ENA27 49 CDATA/HFEC2
64 GNDXTAL
1.8
VDD18
0
NC IPO
0
GND8
0
TEST
1.8
VCCXTAL18
C4001
100GT02720 0.9
XTAL1
10P CH
0.9
XTAL0
C4002 10P CH
10
0
OFDM DEMODULATOR 1 2 3 4 5 6 7 8 9 10
IC4001 0 1.8 1.8 0 0 0.8 1.3 3.4 1.7 1.7
STV0360
ETANT
NOTE: THIS SCHEMATIC DIAGRAM IS THE LATEST AT THE TIME
OF PRINTING AND SUBJECT TO CHANGE WITHOUT NOTICE
D E
F G
0 1.7 3.4 1.3 1.3
38 37 36 35 34 33
1.3
FED[2]
D2
1.3 FED[3]
D3
0
GND3
1.3
FED[4]
D4
1.8
VDD18
1.3 FED[5]
D5
1.3 FED[6]
D6
0 FED[7]
D7
0
GND2
W815
0 FESTROUT
STR_OUT
3.4
VDD33
R4008 47
3.3 I2CSDA
SDA
R4009
3.3 I2CSCL
SCL
47
3.4
SDAT
3.4
SCLT
P3V3
0
TSDA
11 12 13 14 15 16
TSCL
0 3.3 1.8 0 0 0
NC
NOTE:THE DC VOLTAGE AT EACH PART WAS MEASURED
WITH THE DIGITAL TESTER WHEN THE COLOR BROADCAST
WAS RECEIVED IN GOOD CONDITION AND PICTURE IS NORMAL.
F G
H
8
7
6
FROM/TO ASIC
FERESET
FEOFF
FEERROR
FEVALID
FECLK
FED[0]
FED[1]
FED[2]
FED[3]
FED[4]
FED[5]
FED[6]
FED[7] 5
FESTROUT
I2CSDA
I2CSCL
FROM/TO COMMON INTERFACE
FEVALID
FECLK
FED[0]
FED[1]
FED[2]
FED[3]
FED[4]
FED[5]
FED[6]
4
FED[7]
FESTROUT
FROM/TO POWER I/O
P3V3
AT+32V
P5V
T3V3D
GND
3
T1V8D
T3V3A
T1V8A
T1V8X
2
1
PCBDH0
CEF196
H
H-38