2-8(No.YA698<Rev.001>)
(No.YA698<Rev.001>)2-7
MAIN PWB ASS'Y (1/28)
[DVB-T+C TUNER]
HU-71100005
lt-26_32db1bu_0514_24/30_0.0
1
1
2
2
3
3
4
4
5
5
6
6
A
A
B
B
C
C
D
D
+5VTA
+5VT_ANT
+5VTA
+5VTA
+5VT_ANT
+3V3DT
+5VTA
+3V3DT
RF_CVBS
SIF
TUNER0_SCL
TUNER0_AGC
IF0_NARROW-
IF0
TUNER0_SDA
ANT_PWR_EN
ANT_PWR_CHK
All location are from 921 to 960
IIC AS : Tuner : 0xC0h
Antenna Current Limiting Circuit (100mA Limiting)
Antenna Power Short Protection Circuit
IF ANT_PWR_CTRL is L
--> ANT_PWR_EN L
Fault Flag (Output):
Active-low, open-drain output.
Indicates overcurrent or
thermal shutdown conditions
ANT_PWR_EN
LOW
HIGH
ON
+5V_ANT
OFF
Current limit threshold is determined by
ILIMIT = 230V / RSET,
where : 154 < RSET < 2.29k
Analog Demod : 0x86h
R944 and R929 are located near by U921
R934
000/1005
R952
OPEN-330/F/1005
R929
331/F/1005
C939
220uF/16V/MVK/S
RF IN
U921
FQD1116AME/BH
RF PIN IN/OUT(OPTION)
1
ANT_PWR
2
GND
3
NC
4
RF_AGC
5
GND
6
5v
7
VT
8
GND
9
NC
10
AS
11
SCL
12
SDA
13
REF
14
IF-AGC
15
DIF1
16
DIF2
17
WIF OUT/NC
18
+5V IF
19
2nd IF SOUND/LOW DIG IF1
20
2nd IF SOUND/LOW DIG IF2
21
NC
22
AS_IF
23
CVBS
24
GND
25
GND
26
GND
27
GND
28
R933
000/1005
R922
330/1005
C933
OPEN-104p/16V/1005
C932
3R3p/50V/005
L921
BLM18PG300SN1D
R932
000/1005
R947
331/F/1005
R924
103/1005
R950
OPEN-331
C926
102p/50V/1005
C922
104p/16V/1005
L922
BLM18PG300SN1D
C925
104p/16V/1005
C930
102p/50V/1005
C923
102p/50V/1005
R951
OPEN-331
R928
750/F/1005
R927
222/1005
C929
104p/16V/1005
C927
220uF/16V/MVK/S
R948
000/1005
C931
220uF/16V/MVK/S
C934
220p/50V/1005
R949
000/1005
C936
OPEN-330p/1005
R923
101/1005
R943
562/1005
R944
331/F/1005
C937
OPEN-220p/50V/1005
C935
OPEN-330p/1005
R930
562/1005
U922
POWER SW MIC2544-1YMM
EN
1
FLG
2
NC
4
ILIM
5
OUT
6
IN
7
OUT
8
GND
3
L923
BLM18PG300SN1D
Q925
FDV301N_NL
1
3
2
R926
000/1005
Q924
FDV301N_NL
1
3
2
MAIN PWB (7/28)
MAIN PWB (12/28)
MAIN PWB (12/28)
MAIN PWB (26/28)
MAIN PWB
(26/28)
CIRCUIT DIAGRAMS
MAIN PWB CIRCUIT DIAGRAM (1/28) [DVB-T+C TUNER]
