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Circuit Descriptions
7.
7.3
DC/DC Converters
The on-board DC/DC converters deliver the following voltages
(depending on set execution):
•
+5V-STANDBY, permanent voltage for the Stand-by
controller, LED/IR receiver and controls
•
+12V, input from the power supply for the panel common
(active mode)
•
+12V, input from the power supply for audio amplifier
•
+1V2, from the power supply for the scaler IC MT5580
•
+1V5, supply voltage for DDR2 (diagram B03B)
•
+3V3, general supply voltage
•
+5V, supply voltage for USB and CAM
•
+3V3-TUN, supply voltage for tuner
•
+5V-USB, input intermediate supply voltage for USB
•
+3V3 from the power supply for the scaler IC MT5580
•
+12V, input from the Power supply for the Ambilight
common.
•
+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
7.4
Front-End Analogue and DVB-T, DVB-C,
ISDB-T reception
7.4.1
Front-END Analogue part
The Front-End for Analogue tuner consist of the following key
components:
•
TUNER EUROPE ST25CS-2-E(DVB-T/C)
•
SCALER MT5580PUEI/B PBGA-511 TV Processor
Below find a block diagram of the front-end application for the
front-end application for analogue part.
3
VLED+
n.c.
n.c.
n.c.
n.c.
n.c.
LED1-
PS_ON
VLED_1
PS_ON
PS_ON
VLED_1
4
VLED+
n.c.
n.c.
n.c.
n.c.
n.c.
LED1-
2D/3D
VLED_1
2D/3D
2D/3D
VLED_1
5
LED3
GND
VLED-
GND
GND
VLED-
n.c.
GND
n.c.
GND
GND
n.c.
6
LED4
GND
VLED-
GND
GND
VLED-
n.c.
GND
n.c.
GND
GND
n.c.
7
n.c.
GND
-
GND
GND
-
n.c.
GND
n.c.
GND
GND
n.c.
8
n.c.
GND
-
GND
GND
-
n.c.
GND
n.c.
GND
GND
n.c.
9
-
n.c.
-
+12V12V_audio -
VLED2-
+12V_AL
VLED_2
+12V
+12V_Audio VLED_2
10
-
n.c.
-
+12V12V_audio -
VLED2-
+12V_AL
VLED_2
+12V
+12V_Audio VLED_2
11
-
+12V
-
+12V
+12V
-
n.c.
+12V_AL
n.c.
+12V
+12v
n.c.
12
-
+12V
-
+12V
+12V
-
VLED2+
+12V_AL
VLED+
+12V
+12v
VLED+
13
-
+12V
-
+12V_AL
+12V
-
+12V_AL
-
+12V
+12v
-
14
-
+12V
-
+12V_AL
+12V
-
+12V_AL
-
+12V
+12v
-
Connector
Model
24"
28" & 32HFL3009D/12
32HFL5009D/12
40HFL3009D/12
40" & 48" 5009D
55"
Number
CN8101
CN9904
CN8101
CN9101
CN9101
CN8501
CN8101
CN8101
CN9301
CN9301
CN8101
Description to panel
to SSB
o panel
to SSB
to panel
to SSB
to panel
to SSB
to panel
to SSB
to SSB
to panel
Pin
8
14
6
14
14
6
12
14
12
14
14
12
19600_202.eps
P12V
3.3V
AVDD3V3
3V3SB
VCCK
AVDD1V2
1.5V
DV1.2
5V_SW
5V_SW
5V_SW
5V_USB
5V_USB
PVDD
FB755
FB754
AMP STA381BWTR
U702
Q757
U704
U703
U702
Q702
U102
U703
U709
U705
Tuner
MT5580
USB
CI-VCC
U701
U105
DDR
Demond IC
WiFi VCC
EMMC
U4250
MT5580
12V_AL
5V-STB
LNB Power
Keyboard
MT5580
MT5580
+12V
5VSB
P12V
PANEL_VCC
Q750