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17. SCHEMATIC DIAGRAMS
R139
S100
N.C.
5V_TUNER
3k3
PTC RES
C101
1UF 16V
10n
TU100
N.C.
50V
R102
AGC
1
5k1
SHORT
R103
R106
TU
2
5k1
5k1
N.C.
S101
1UF 16V
S102
AS
3
39p
50V
R104
C102
SCL
4
100R
R105
SDA
5
100R
39p
16V
50V
1u
C103
NC
6
C104
R100
3k3
R140
VS
7
PTC RES
5k1
S113
NC/ADC
8
AN_IF
R101
4k7
5V_TUNER
VST
9
S103
IF2
10
IF1
11
SHEET3
17MB22-2
L112
VCC_12V
12V_IF
10u
PL100
DIGITAL IF CONNECTOR
L116
1
2
3
10u
L102
5V_TUNER
10u
VCC_5V
Q103
50V
Q102
1n
BF799
BF799
50V
50V
C138
1n
1n
R136
R135
47R
47R
C135
C136
S117
R123
150R
1
IN1
L101
R124
2
IN2
5V_TUNER
150R
BLM21A601S
IF_AGC
S119
R107
1k
VCC_33V
S118
IF_AGC
IC101
SCL_DVB
1
2Y1
VCC
16
SCL_5V_IC
2
2Y0
2Z
15
S105
S120
AGC_DVB
3
3Y1
1Z
14
S121
IF_AGC
4
3 Z
1Y1
13
SDA_DVB
5
3Y0
1Y0
12
6
E
S1
11
7
VEE
S2
10
8
GND
S3
9
74HCT4053
MAIN BOARD CIRCUIT - SHEET 1
330R_100MHZ_3A
L103
VCC_5V
10u
L114
5V_DRX
L117
10u
3V3_DRX
C134
L104
VCC_3V3
10u
DRX_CLK
1n
50V
DRX POWER SUPPLY
SHEET3 VCTP PIN80
50V
1n
C137
1
AVSS_ADC
L105
L106
5V_DRX
2
AVDD_ADC
10u
3
ANATSTX
4
ANATSTY
5V_DRX
5
AVDD_FE8
16V
6
AVSS_FE8
AN_IF
100n
7
AVSS_FE401
Z100
X6966M
C119
8
IFINX
OUT1 4
600R_100MHZ_200mA
5V_DRX
9
AVDD_FE40
L113
OUT2 5
10 IFINY
GND
3
11 AVSS_FE402
C121
100n
16V
5V_DRX
5V_TUNER
SDA_5V_IC
S106
R134
5V_TUNER
4k7
5V_TUNER
S107
R133
Q104
1k
BC848B
S114
TV/DVB_SWITCH
3V3_DRX
SHEET 8
VGA_MUX_SW
X100
YPBPR_MUX_SW
AUDIO_MUX_SW
20.25MHz
SYNC_SW1
SHEET3
TUNER_AGC
33
PORT1
32
PORT0
31
30
DVSS_CAP
DVSS
29
IC100
L110
DVDD
28
DRX3960A
L111
C127
DVDD_CAP
27
R119
SCL
26
100R
33p
25V
R120
25
SDA
100R
RESETQ
24
25V
33p
C128
TEST_EN
23
C126
100n
16V
C142
R109
10u
100R
16V
SHEET 3
Q100
BC848B
R114
75R
TUNER_CVBS_IN
R115
75R
TUNER_CVBS_SW
SHEET 8
TUNER/DRX
DEMODULATOR
SYNC_SW2
AGC_TV
SYNC_SW2
SHEET 3
SW_ENABLE2
3V3_DRX
3V3_DRX
SCL_3V3_IC
SDA_3V3_IC
SHEET 3,5,6
3V3_DRX
R122
Q101
470R
BC848B
RESET_IC
SHEET3
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