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, permanent voltage for the Stand-by
controller, LED/IR receiver and controls
•
+12V, input from the power supply for the panel common
(active mode)
•
+24V, input from the power supply for audio amplifier
•
+1V2, core voltage supply for 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
Figures gives a graphical representation of the DC/DC
converters with its current consumptions:
Figure 7-3 DC/DC converters
Connector
22HFL3008
24HFL3008
32HFL3008
39HFL3008
Number
CN8102
CN9103
CN8101
N9101
CN8101
CN9101
CN8101
CN9101
Descriptio
n
to panel
to SSB
to panel
to SSB
to panel
to SSB
to panel
to SSB
Pin
2
13
6
13
12
13
12
13
1
LED1
-
LED1
-
VLED
P_Scan
VLED
-
2
VLED
+5.2V
LED2
+5.2V
n.c.
+5.2V
n.c.
+5.2V
3
-
+5.2V
VLED+
+5.2V
LED6
+5.2V
LED1
+5.2V
4
-
-
VLED+
-
LED4
PS_ON
LED1
24V
5
-
+12V/+16V LED3
+16V
LED2
+24V
LED1
24V
6
-
+12V/+16V LED4
+16V
n.c.
+24V
LED1
PS_ON
7
-
GND
-
GND
n.c.
GND
LED1
GND
8
-
GND
-
GND
LED1
GND
LED1
GND
9
-
GND
-
GND
LED3
GND
LED1
GND
10
-
-
-
-
LED5
+12V
LED1
+12V
11
-
-
-
-
n.c.
+12V
LED1
+12V
12
-
DIM
-
DIM
VLED
DIM
n.c.
DIM
13
-
ON/OFF
-
ON/OFF
-
ON/OFF
VELD
ON/OFF
19430_202_130130.eps
130130
LDO
U701
MAIN CHIP
MT5580
DDR*3
NT5CB256M8GN-D1
USB PWR
+5V_SW
BUCK CONVERTER
POWER SWITCH
DDR 1V5
+5VSB
TDQS-A901F
TU101
TDSY-G230D
TU102
3V3-TUNER
P24V
DV15_DDR
PCMCIA CARD
U4100
GL850G-OHG
+5V_SW
DV15_DDR
LDO
U102
CI CARD PWR
CI2_VCC
STB_PWR5V
DV33 & AV33
AVDD3V3
U703
+5V_SW
DV33
MT5136AN
U103
DV3V3
MAIN CHIP
MT5580
U702
MT5580
PVDD
FB753
FB752
AMP STA381BWTR
P12V
PANEL_VCC
+5V_SW
AON4421
Q750
Q702