Circuit Descriptions
7.
7.2.3
Connector overview
Table 7-1 Connector overview
7.3
DC/DC Converters
The on-board DC/DC converters deliver the following voltages
(depending on set execution):
•
+5V-STANDBY, transform from 12V, permanent voltage for
the Stand-by controller.
•
+12V, input from the power supply for the panel
common(active mode)
•
+12V, input from the power supply for the AMP
•
+1V2, from the power supply for the scaler IC MT5580
•
+1V5, supply voltage for DDR3
•
+3V3, genenal supply voltage
•
+5V, supply voltage for USB and CAM
•
+3V3-TUN, supply voltage for tuner
•
+5V-USB, input intermediate supply voltage for the USB
Power
•
+3V3, from the power supply for the scaler IC MT5580
•
+3V3-DVBS, clean voltage for DVB-S2 channel decoder
•
+1V2-DVBS, core voltage for DVB-S2 channel decoder
Figures gives a graphical representation of the DC/DC
converters with its current consumptions :
Figure 7-3 DC/DC converters
Number
Connector
32"
40"
55"
CN9101
CN8602
CN9101
CN8101
CN9301
CN8101
Description
to SSB
to Panel
to SSB
to panel
to SSB
to panel
Pin
16
8
14
12
14
12
1
DIM
VLED+
DIM
DIM
VLED+
2
On/off
VLED+
On/off
n.c.
On/off
n.c.
3
PS_ON
n.c.
PS_ON
VLED_1-
PS_ON
VLED_1
4
n.c.
n.c.
2D/3D
VLED_1-
2D/3D
VLED_1
5
GND
LED_
GND
n.c.
GND
n.c.
6
GND
LED_
GND
n.c.
GND
n.c.
7
GND
n.c.
GND
n.c.
GND
n.c.
8
GND
n.c.
GND
n.c.
GND
n.c.
9
+12V_A
-
+12V-AUDIO
VLED_2-
+12V-AUDIO
VLED_2
10
+12V_A
-
+12V-AUDIO
VLED_2-
+12V-AUDIO
VLED_2
11
+12V
-
+12V
n.c.
+12V
n.c.
12
+12V
-
+12V
+12V
VLED+
13
+12V
-
+12V_AL
-
+12V
-
14
+12V
-
+12V_AL
-
+12V
-
15
+5.2V
-
-
-
-
-
16
+5.2V
-
-
-
-
-
19780_202.eps
P12V
3.3V
AVDD3V3
3V3SB
AVDD1V2
DV1.2
5V_SW
5V_SW
5V_USB
DVD3V3
PVDD
FB755
FB754
AMP STA381BWTR
U703
U702
Q702
USB
U703
U705
U102
CI-VCC
Tuner
MT5580
U4250
U105
WIFI VCC
DDR
Demond IC
EMMC
Keyboard
MT5580
MT5580
5VSB
P12V
PANEL_VCC
Q750
+12V
1.5V
U701