ViewSonic VT2730-1M Service Manual page 67

8.2. Tuner & Demod
I109
DTVA50FVH1019B
17 1
GND RF_AGC
18 2
GND B+
19 3 AFT
GND AFT
20
4
GND NC
21 5
GND NC
22 6
GND NC
7
NC
8 CVBS
CVBS
9
NC
10 SIF
SIF
11 SCL_TU
SCL
SDA_TU
12
SDA
13
NC
T_IF_AGC
14
IF_AGC
15 IF+
IF(+)
IF-
16
IF(-)
+3.3V_De
+1.2V_De
AFTC
4 AFTC
SIFP
4 SIFP
SIFM
4 SIFM
TUNER_CVBS
4 TUNER_CVBS
VCOM0
4 VCOM0
I2C-SCL
4 I2C-SCL
I2C-SDA
4 I2C-SDA
TS_VALID
4 TS_VALID
TS_SYNC
4 TS_SYNC
TS_CLK
4 TS_CLK
2ndReset
4 2ndReset
TS_D[7:0]
4 TS_D[7:0]
ViewSonic Corporation
5V_TU
5V_AGC
R148 NC/1K/1%
R149 R150 R151
NC/1K NC/499/1%
NC/1K
R152 10K IF_AGC
R153 220
C154 10nF IFP
C155 10nF R154 220 IFN
C156
22nF
C160 10nF R155 C161 0.1uF SIFP
47
C162
SIFP0 Trace Width >= 15mil
R156
NC
2.2K
AFT
R158 C163 0.1uF SIFM
47
Close to Scaler & Ground Shielding
C165 47nF
R160 47 TUNER_CVBS
R161
Tuner_CVBS Trace Width >= 15mil
NC/75
R162 0R
C166 47nF VCOM0
Close to Scaler & Ground Shielding
3.3V DTV Demodulator
I132 NC/1117-ADJ
3 2
VIN VOUT
1 4
ADJ TAB
C175
5V_DTV +3.3V_De
I110 1084-ADJ
0.1uF
3 2
VIN VOUT
1 4
ADJ TAB
C170
C173 C174 +
0.1uF
47uF/16V
0.1uF
R169
110/1% C178
R168
182/1% 0.1uF
1.2V DTV Demodulator
+1.2V_De
+3.3V_De
I111 1117-ADJ
3 2
VIN VOUT
C182 C184
1 4
C183
ADJ TAB +
0.1uF
0.1uF
470uF/16V/LowESR
R175
121/1% C185 0.1uF
R174 REF_BOT
0R REF_TOP
IFN
IFP
VDD_3.3
L116
FB/120R/3A
C191 C193
+ C186 C187 C188 C189 C190 C192 C194
0.1uF 0.1uF
22uF/16V 0.1uF 0.1uF 0.1uF 0.1uF 0.1uF 0.1uF
R182 1K
VDD_3.3
VDD_1.2 IF_AGC IF_AGC IF_AGC IF_AGC
L117
FB/120R/3A
+ C197 C202
C198 C199 C200 C201
22uF/16V 0.1uF
0.1uF 0.1uF 0.1uF 0.1uF
100 R185
5V_DTV
SCL_TU
VDD_1.2 SDA_TU 100 R186
4.7K R187
4.7K R188
C209
C208
C203 C204 C205 C206 C207 22pF 22pF
0.1uF
0.1uF 0.1uF 0.1uF 0.1uF
VDD_1.2 +3.3V_De
R191
D103
C210 C211 C212
C213 C214 NC/10K NC/1N4148
0.1uF 0.1uF 0.1uF
0.1uF 0.1uF
RESET_N R192
C215
NC/10uF/10V/Y5V
5V_DTV
5V_TU
L113
FB/120R/3A
C153
+ C151
0.1uF
22uF/16V
Close to Tuner
5V_AGC
L114
FB/120R/3A
C158 C159
C157
0.1uF 1nF
10uF/10V/Y5V
R157 AFTC
100K
R159
C164
100K
0.1uF
I2CADDR0
REF_BOT C171
L115 NC/1uH NC/620pF C172 27pF VCC
R167 VCC
C176 X101
NC/1M
R170
10uF/10V/Y5V 25MHz GND
0R
C177 27pF GND
REF_TOP
C180
VDD_3.3
NC/1.5nF
VDD_1.2
C179
10uF/10V/Y5V
I112
EXT_PLL_SEL
76 50
VSSBBH_ABB VDD12IH
77
49
VDD33TH_ABB VSSIPH
78 48
CML TEST_SEL0
79 47
RN TEST_SEL1
80 46
RP TEST_SEL2
81 45
AIN VDD12IH
82
44
AIP VSSIPH
83 43
VSSBBTH_ABB TEST_SEL3
84 42
VDD33TH_ABB TEST_SEL4
85
41
VSSIPH VDD33OPH
86 40
VDD12IH VSSOH
87
39
D_IN3 I2CADDR1 I2CADDR1
88 38
D_IN2 I2CADDR0 I2CADDR0
89
D_IN1 SCL 37
90
36
D_IN0 SDA
91 35
VDD12IH VDD12IH
92
34
VSSIPH VSSIPH
93 33
VDD12IH EXT_PLL_SEL
R183 EXT_PLL_SEL
94 32
VSSIPH PKVAL
95
31
IF_GAIN VDD12IH
96 30
TU_GAIN VSSIPH
TP01
97
GPIO_OUT1 PKERR 29
98
28
TUNER_CLK PKSYNC R184
99 27
VDD33OPH VDD33OPH
100
26
VSSOH VSSOH
101
E-PAD
MSB1501
R189 NC/0R
R190 100
RESET_N
TSA0 TS_D0
TSA1 TS_D1
TSA2 TS_D2
TSA3 TS_D3
RP02 100x4
TSA4 TS_D4
TSA5 TS_D5
TSA6 TS_D6
TSA7 TS_D7
RP03 100x4 TS_D[7:0]
100 2ndReset
If using 2ndReset,
Change R191 => 1K,
C215 => 1uF.
66
S5H1409
I2CADDR1 S5H1409 Device ID
PIN48 TEST_SEL4
VCC 0xF2
GND 0x72
VCC 0xB2
PIN47 TEST_SEL3
GND 0x32
PIN46 TEST_SEL2
VDD_3.3 VDD_3.3 VDD_3.3
PIN43 TEST_SEL1
R171
R172 R173
NC/1K 1K 1K
I2CADDR1
PIN42 TEST_SEL0
I2CADDR0
R176
R177
NC/1K R178 S5H1409
NC/1K NC/1K
C178
39pF
RP01 0Rx4
C183
R172
NC
R179 0R
49.3811
X101
R180 100 I2C-SCL
MHz
R181 100
I2C-SDA
1uH
C195 C196
L117
3rd overtone
22pF 22pF
620pF
C177
100
TS_VALID 3rd overtone
PKERR
C184
1500pF
100
TS_SYNC
R187 220R
R157 1K
100nF
C162
R152 1K
R154
1K
TS_CLK
R155
1K
499R
R156
RP01,
0R
R184
R176 1K
R194
NC
Confidential - Do Not Copy
S5H1411
GND NC
GND NC
GND NC
GND NC
GND NC
S5H1411 1501
30pF
1M NC
24.69 25
MHz MHz
NC NC
NC NC
56pF
NC
1K
10K
20nF
NC
NC
NC
NC
0R
NC
NC
VT2730-1M