ViewSonic N2635w-1M Service Manual page 65

8.2. TUNER AND DEMOD.
SAMSUNG COMBO-TUNER
I114
2
GND
3
GND
1
NC
6
NC
7
NC
8
NC
9
NC
10 C175
NC
0.1uF
11
RG_AGC_TP
C0603
12
NC
13
VT(+30V)
14
IF+
15
IF-
16
IF_AGC
17
TUNER_IF_TP
18
SCL
19
SDA
20
GND
21
BP(+5V)
22
NC
AFT
23
AFT
NTSC_SIF
24
SIF
25 NTSC_CVBS
CVBS
4
GND
5
GND
26
GND
27
GND
28
GND
29
GND
PORT TUNER DTVS205CH201A
Tuner21
CLOSE TO MT511x
IF_AGC2
C503
NC(47nF)
C0603
IF_AGC
C200
47nF
C0603
FAT_IN- C201
10nF
C0603
L118
NC(220nH)
L0805
FAT_IN+ C210
10nF
C0603
C211
0.1uF C0603
C212
0.1uF C0603
C215
0.1uF C0603
DVDD18
X101
25MHz
ViewSonic Corporation
+30V_TUNER
L113
FB/200R/2A
L0805
ROUTE SYMMETRICALLY
+ C174
10uF/50V
CE025050
R0603
R141 0 FAT_IN+ DV33_DM
R142 0 FAT_IN-
R144 IF_AGC
R0603
C179 4.7K
R0603
10nF
C0603 R145
L114 +5V_TUNER 4.7K
Close to Tuner R0603
FB/200R/2A
L0805 R147 TUNER_SCL
100 R0603
C181 + C180 R148 TUNER_SDA
0.1uF 220uF/16V
100 R0603
C0603 CE050080
+5V_TUNER
C499
NC(1nF)
C0603
C497
R377 NC(1uF/16V/Y5V)
NC(510) C0603
R0603 I128 I129
1 5 1
IN+ OUT+ VCC_+5V GND
2 4 2
IN- OUT- IN_1 OUT_1
L101
3
IN_2 OUT_2
R378 NC
3 4
GND VAGC GND
NC(510) L0805
R0603 NC(SAW FILTER X6965D) NC(UPC3218)
SIP5D SO08
C498
NC(1uF/16V/Y5V)
C0603 C501
NC(10nF)
IF SAW FILTER AND AMPLIFIER C0603
R137
ROUTE SYMMETRICALLY
NC(4.7K)
R0603
R138
NC(1K) DVDD33
MT5111_RF_AGC
R0603
R154
1K
MT5112_IF_AGC
R0603
ADVDD33_1 76
ADVDD33
77
NC
78
NC
C209
79
AVSS8
NC(47pF)
AVDD33 80
AVDD8
C0603
81
IN-
82
IN+
AVDD33
83
AVDD1
84
NC
85
AVSS1
REFBOT
86
REFBOT
C214 VCMEXT
87 I115
VCMEXT
10uF/10V/Y5V
88
REFTOP
C0805 REFTOP
89
AVSS7
90 MT511x
AVDD18
L120 AVDD33
91
AVDD7
FB/200R/2A AVDD3 92 LQFP100
AVDD3
AVDD33
93
AVDD6
L0603 C216
94
AVSS3
0.1uF
95
AVSS6
C0603
XTAL2 96
XTAL2
XTAL1
97
XTAL1
98
AVSS4
C218 AVDD33
99
AVDD4
27pF
100
AVSS2
R155 C0603
1M C219
R0603 27pF
C0603
62
N2635w-1M
Confidential - Do Not Copy
NEARLY TUNER
NTSC_CVBS
C178
47pF
C0603
NTSC_SIF
R146
4.7K
R0603
NEARLY TUNER
R150
100K
AFT
C500
NC(0.1uF) + C502 R0603
C0603
NC(10uF/50V) R151
CE025050 220K
R0603
FAT_IN-
8
7
6
5
FAT_IN+
IF_AGC2
RESERVE HEAT-SINK SPACE
50
NC
49
GPIO1(P1.1)
GPIO_0
48
RESET_
SIF_SCL
47
HOST_CLK
46
DGND18
DVDD18
45
DVDD18
SIF_SDA
44
HOST_DATA
43
DGND33
42 DVDD33
DVDD33
GPIO_18
41
DGND18
DVDD18
40
DVDD18
RN01
39 1 8
TS_ERR
38 2 7 TS0VALID
TS_VAL
TS0CLK
37 3 6
TS_CLK
TS0SYNC
36 4 5
DGND33
DVDD33 33x4
35
DVDD33
34 RN8P4R-I
TS_SYNC
33
TS_DATA0
RN02 TS0DATA0
32 1 8
TS_DATA1
TS0DATA1
31 2 7
DGND18
30 DVDD18 3 6 TS0DATA2
DVDD18
TS0DATA3
29 4 5
TS_DATA2
33x4
28
TS_DATA3
RN8P4R-I
27
DGND33
26 DVDD33
DVDD33
RN03
33x4
RN8P4R-I
TS0DATA4
TS0DATA5
TS0DATA6
TS0DATA7
2 +30V_TUNER
NEARLY MT5372
2 +5V_TUNER
2 DV33_DM
R140
2,4,5,6,7,8,9,10,11,12,13,14 GND
100
C177 47nF CVBS0
C0603
R0603
4 CVBS0
NTSC CVBS
4 MPX1
R149
2,4,5,6,7,8,9,10,11,12,13,14 AGND_AFE
0
C182 10nF MPX1
TUNER - ANALOG OUTPUT
C0603
R0603 C183
NC
C0603
4 ADIN3
SIF (4.5MHz)
2 DV33_DM
2 DV18_DM
2,4,5,6,7,8,9,10,11,12,13,14 GND
GLOBAL SIGNAL
NEARLY MT5372
ADIN3
4 TS0DATA[0..7]
4 TS0SYNC
4 TS0VALID
C184
4 TSCLK
NC
4 GPIO_18
C0603
TS INPUT
6,11 SIF_SDA
6,11 SIF_SCL
4,11 GPIO_0
DVDD18
C186 C187 C188 C189
0.1uF 0.1uF 0.1uF 0.1uF
C0603 C0603 C0603 C0603
Digital 1.8V Bypass Caps
DVDD33
C194 C195 C196 C197
0.1uF 0.1uF 0.1uF 0.1uF
C0603 C0603 C0603 C0603
Digital 3.3V Bypass Caps
AVDD33
C203 C204 C205 C206
0.1uF 0.1uF 0.1uF 0.1uF
C0603 C0603 C0603 C0603
Analog 3.3V Bypass Caps
DV18_DM L115 DVDD18 AVDD33 L119
FB/200R/2A FB/120R/3A
L0805 L0603
+ C185 C192
10uF/50V 0.1uF
CE025050 C0603
AVDD33 L121
FB/120R/3A
DV33_DM L116 DVDD33
FB/200R/2A L0603
L0805
+ C193 C199
10uF/50V 0.1uF
CE025050 C0603 AVDD33 L122
FB/120R/3A
L0603
DV33_DM L117 AVDD33
FB/200R/2A
L0805
+ C202 C208
10uF/50V 0.1uF AVDD33 L123
CE025050 C0603
FB/120R/3A
L0603
+30V_TUNER
+5V_TUNER
DV33_DM
GND
CVBS0
MPX1
AGND_AFE
ADIN3
DV33_DM
DV18_DM
GND
TS0DATA[0..7]
TS0SYNC
TS0VALID
TS0CLK
GPIO_18
SIF_SDA
SIF_SCL
GPIO_0
C190 C191
0.1uF 0.1uF
C0603 C0603
C198
0.1uF
C0603
C207
0.1uF
C0603
AVDD3
C213
0.1uF
C0603
AVDD5
C217
0.1uF
C0603
ADVDD33_1
C220
0.1uF
C0603
ADVDD33_2
C221
0.1uF
C0603