Sharp LC-20SD5E Service Manual page 44

A B
8
FROM/TO 21PIN
TU_VIDEO_OUT
FROM/TO REGULATOR
7
P.CON+5V
FROM/TO POWER1
GND
P.CON+3.3V
6
FROM/TO SCALER
SIF
DTV_AV_SW
FROM/TO SUB MICON/RS-232C
5 RF_AGC
F_SCL
F_SDA
4
3
FROM/TO OFDM/TUNER
TSCL
TSDA
TINP
TINM
TIAGC2
2
NOTE:THE DC VOLTAGE AT EACH PART WAS MEASURED
1
WITH THE DIGITAL TESTER WHEN THE COLOR BROADCAST
WAS RECEIVED IN GOOD CONDITION AND PICTURE IS NORMAL.
A B
H-7
C
CAUTION
NOTE: THIS SCHEMATIC DIAGRAM IS THE LATEST AT THE TIME
OF PRINTING AND SUBJECT TO CHANGE WITHOUT NOTICE
C
D E
TUNER SCHEMATIC DIAGRAM
(MAIN PCB)
Q2802
KRC102SRTK
2.0
R2805
10K
3.2 3.2 NC 0 NC 0 0 0
1 2 3 4 5 6 7 8
2Y1 2Y0 3Y1 3-COM 3Y0 INH GND GND
Vcc 2-COM 1-COM 1Y1 1Y0 A B C
16 15 14 13 12 11 10 9
3.2 3.0 3.0 3.2 3.0 5.1 5.1 5.1
LEVEL SHIFT
Q2800
KTK5132E
3.3 5.0
3.3
C2800
0.1 B
3.3 5.0
LEVEL SHIFT
3.3 Q2801
C2801
KTK5132E
16V 100 YK
ATTENTION
:SINCE THESE PARTS MARKED BY ARE :LES PIECES REPAREES PAR UN
CRITICAL FOR SAFETY,USE ONES DANGEREUSES AN POINT DE VUE SECURITE
DESCRIBED IN PARTS LIST ONLY N'UTILISER QUE CELLS DECRITES
DANS LA NOMENCLATURE DES PIECES
D E
F G
C2809
220P CH
C2810 21
NC 1 B1
B2802 6.3V 1000 ZL_P
5.0
2 B2
HCB1608KF-330T50
5.0
3 B3(Vcc)
R2811 R2815
3.0
4 AGC
100 82K
NC 5 NC
NC 6 NC
0
7 GND
0
8 AS
W898
5.0
9 SCL
W900
5.0
10 SDA
NC 11 IF
0
R2818 12 GND
75
NC 13 NC
R2821
W901
5.0
14 2ndSIF
100
5.0
15 CVBS
NC 16 AUDIO
NC 17 NC
W848
1.2
18 IF AGC
W902
5.0
19 DIF1
W903
5.0
20 DIF2
23
PCBF40
CMG114
ETANT
F G
H
8
7
6
TU2800 5
TDTG-S156D
22
4
3
24
2
1
H
H-8