10.
Circuit Diagrams and PWB Layouts
10-16-2
System Power 2
19616_511.eps
System Power 2
B02
B02
2014 04 04
715G6842
System Power 2
R4292
36K 1%
LNB_EN
15
LNB_EN
R4293
5.1K 1%
U751
MP8126DF-LF-Z
SGND
1
BYPASS
2
VDD
3
COMP
4
EN
5
LINEDROP
6
POK
7
TCAP
10
ILIMIT
11
VOUT
12
VBOOST
13
BST
14
SW
15
PGND
16
13V/18V
8
EXTM
9
EP
17
TUN_LNB
12
TUN_LNB
C760
10
u
F 25V
L750
22UH
R778
33Kohm 1/16W +/-1%
C7
83
NC/10
u
F 25V
TUNER_LNB
C7
8
4
2.2
u
F 25V
R753
6K8 1/10W 5%
FB751
NC/120R
1
2
FB754
120R
1
2
R750
10K 1/16W 5%
R759
10K 1/16W 5%
R752
10K 1/10W 5%
FB755
120R
1
2
C750
1UF 10% 16V
C751
NC/4.7UF 10V
Q751
BC847C
DVDD3V3
FB750
120R
1
2
R751
5.1KOHM +-5% 1/10W
PANEL_VCC
+12V
+5V_SW
PVDD
+12V_Audio
PANEL_VCC_ON/OFF
10,12
TUNER_LNB
15
GND
3,5,6,7,8,9,10,11,12,13,14,15,16
DVDD3V3
3,5,6,8,10,12,13,15,16
PVDD
8
DISEQC_OUT
15
+5V_SW
3,6,7,10,14,15
13/18V_SW
15
+12V
3,8
LNB_LINEDROP
15
ZD4103
MM3Z3V6B
1
2
TUN_LNB
Q750
SM3201PSQA-TRG
D
1
D
2
D
3
G
4
S
5
D
6
D
7
D
8
Q756
MMBT3904
R4025
NC/0R05 1/16W
+
C752
220UF 16V
13/18V_SW
L751
1.0UH
LNB_EN
LINEDROP
LO : 13V/18V
HI : 14V/19V
DISEQC_OUT
R774
100K 1/16W 5
%
R775
NC/100K 1/16W 5
%
D751
FB340M
1
2
LNB_LINEDROP
C777
100N 50V
R776
100K 1/16W 5
%
+
C762
100UF 16V
C757
470PF 50V
R765
100K 1/10W 5%
C758
47NF 16V
R760
33R 1/16W 5%
C771
2.2uF 25V
R763
NC/10K 1/16W 5%
C754
100NF
R766
4K7 1/16W 5%
C761
22NF 25V
C772
100N 16V
C759
220NF 16V
R767
10K 1/16W 5%
D750
FB340M
1
2
R777
NC/10K 1/16W 5%
ZD750
PJ
S
D24CW
1
2
R768
100K 1/16W 5%
D752
FB340M
1
2
C755
10
u
F 25V
R769
10K 1/16W 5%
C776
10UF 16V
ZD751
NC/PJ
S
D24CW
1
2
+12V
+12V
DVDD3V3
Panel VCC=12V or 5V
R770
10K 1/10W 1%
ESD & Surge
Protect
Add for Unicable
R779
39K 1/16W 5%
PANEL_VCC ON/OFF:(OPCTRL9)
Normal:High
Stand_By:Low
TUNER_LNB
PANEL_VCC_ON/OFF
GND
PANEL_VCC_ON/OFF
Audio VCC= +12V
Yes
0R
5.1K
R751
+12V
NC
NC
Yes
+12V
FB751
FB750
PANEL VCC
+5V
DVDD3V3
PVDD
+5V_SW
DISEQC_OUT
+12V
LNB POWER SUPPLY
13/18V_SW
LNB_LINEDROP