ViewSonic N3752w-1M, Service Manual

Page: 62 / 111

8.7. COMBO TUNER
GLOBAL SIGNAL
TUNER INTERFACE
ROUTE SYMMETRICALLY
Close to Tuner
NTSC CVBS
SIF (4.5MHz)
AIR INPUT
CABLE INPUT
TO DTVS205CH201A
TUNER ANALOG OUTPUT
RF_SWR Hi >>> CABLE INPUT
GND
+30V_TUNER
IF_AGC
FAT_IN-
TUNER_SCLO
TUNER_SDAO
IF_AGC
FAT_IN-
TUNER_SDAO
TUNER_SCLO
NTSC_CVBS
SIF
AFT
TUMPX1 SIF
RF_SWR
RF_SWR
DV33_DM
READY#
AFT
+5V_TUNER
ADC_IN3
TUMPX1
AVCVBS0
ADC_IN3
NTSC_CVBS
AVCVBS0
READY#
GND 12,13,14,15,16,17,18
+30V_TUNER 14
IF_AGC 13
FAT_IN- 13
13
TUNER_SCLO 13
TUNER_SDAO 13
DV33_DM 13,14
READY# 3
+5V_TUNER 14
ADC_IN3 3
TUMPX1 8
AVCVBS0 8
+5V_TUNER
+30V_TUNER
VCC
VCC
+5V_TUNER
R814
10K
R0603/SMD
I801
IC G6Y RELAY
1
7
8
9
10
11
12
13
14
POWER
SELECT
INA
GND
GND
OUT
GND
GND
INB
R818 100 R0603/SMD
R852
NS/0
R0603/SMD
P807
F-CON
F-CON/5P/DIP/P8.0/R
1
2 3
4 5
C824
15pF
C0603/SMD
C818
0.1uF
C0603/SMD
R815 4.7K
R0603/SMD
C819
10nF
C0603/SMD
C822
10nF
C0603/SMD
R819 100 R0603/SMD
R820
100K
R0603/SMD
L804
R121/0805 6A
BEAD/SMD/0805 2A
R817
4.7K
R0603/SMD
Q802
2SC2712
SOT23/SMD
1
3
2
+
C886
100uF/16v
C100UF16V/D6H5
R853
560
R0603/SMD
L801
R121/0805 6A
BEAD/SMD/0805
R851
0
R0603/SMD
P802
F-CON
F-CON/5P/DIP/P8.0/R
1
2 3
4 5
+
C816
10uF/50v
C10UF16V/D5H11
R824
4.7K
R0603/SMD
C823
10nF
C0603/SMD
I804
PORT TUNER DTVS205CH201A
TH1
TH2
TH3
TH4
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
TH5
TH6
TH7
TH8
GND
GND
GND
GND
NC
NC
NC
NC
NC
NC
RG_AGC_TP
NC
VT(+30V)
IF+
IF-
IF_AGC
TUNER_IF_TP
SCL
SDA
GND
BP(+5V)
NC
AFT
SIF
CVBS
GND
GND
GND
GND
+ C820
10uF/50v
C10UF16V/D5H11
R822
NS/75
R0603/SMD
R821
220K
R0603/SMD
C801
0.1uF
C0603/SMD
C821
0.1uF
C0603/SMD
E
B
C
SOT
23
Q801
MMBT3904
1
3
2
R823
0
R0603/SMD
C892
0.1uF
C0603/SMD
+ C817
10uF/50v
C10UF50V/D5H11
R801
0
R0603/SMD
P808
F-CON
F-CON/5P/DIP/P8.0/R
1
2 3
4 5
R816
0
R0603/SMD
ViewSonic Corporation
Confidential - Do Not Copy
N3752w-1M
59