ViewSonic VTMS2431 - Page 73

8.3. CAM Tuner
Close to Mstar IC
Close to Mstar IC
Close to Tuner
Close to Tuner
Vout=VFB*(1+Ra/Rb)
VFB=1.25V
RB=0.7K~5Kohm
Rb
Ra
measure current
SIF trace > 15 mil
IF trace 15 mil ,Cover GND 12mil,GAP 6mil
TV_IN+
TV_IN-
SIF_IN-
SIF_IN+
IF+
IF-
SDAT
SCLK
ATV-CVBS
SIF_OUT
IFAGC
IF_TP
Tuner-AFT
SIF_Q-C
SIF_Q-E
TUNER-SAR2
SIF
CAM_Tuner-5V
ATV_CVBS
30VTU
30VTU
SIF_Q-B
RFAGC1
CVBS+
Tuner-5V
Tuner-5V
Tuner-5V
30VTU
Tuner-5V
5VIF
30VTU+5V_General
R511
0R
C507
100nF
+
C138
1u/50V/(4.7u)
R510
47R
C510
NC
I106
FP6736S5PTR SOT23-5/SMD
1
2
34
5
SW
GND
FBSHDN
V_IN
R509
820R 0603
R502 NC
R504
47K
C140
100nF
R506
10R 0603
R507
47R
+
C502
100uF/16V
R513
1K 0603
R514
NC/75R
C142
100nF/0603
R127 11K5 1% 0603
R512
62R
C509
100nF
R587
NC/0
L502 600R/1.5A 0805
C506
10nF/0603
C504
1nF
Q502
MMBT3904
1
32
R586
NC/2K2
I501
DTVS205EH201A
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
NC
NC
NC
NC
NC
NC
RF_AGC
NC
NC/VT
IF(+)
IF(-)
IF_AGC
IF_TP
SCL
SDA
GND
TU 5V
NC
AFT
SIF OUT
CVBS OUT
GND
GND
GND
GND
GND
GND
GND
GND
C512
NC/680pF
C513
NC/330pF
R503
100K
R508
47K
L113 NC
R125
274K1% 0603
C503
100nF
+
C159
1u/50V
R591 0R
D103 SR36
L112 10uH
+
C137
470u/16V
C561
NC
R505
10R 0603
C501
100nF
R515
47R
C511
100nF
C141
100nF/0603
Q501
NC/MMBT3904
1
32
+
C168
470u/16V
C505
100nF
L501
0R 0805
C508
22pF
R588
0R
R501
100K
C514
100nF
TV_IN+ 4
TV_IN- 4
SIF_IN- 4
SIF_IN+ 4
IF- 2
IF+ 2
T_SCL 2
T_SDA 2
IFAGC 2
TUNER-SAR2 4
5VIF1
+5V_General1,2,4,12
Tuner-5V2
RFAGC1 2
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