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EN 36
7.
TPM14.1L LA
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.
•
+3V3, supply voltage for Keyboard
•
+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 MT5561
•
+1V5, supply voltage for DDR2 ( diagram B03B)
2014-Mar-07
Circuit Descriptions
Connector
Number
CN9101
CN9101
CN9301
Description
to SSB
to SSB
to SSB
Pin
14
14
14
3
n.c.
PS_ON
PS_ON
4
n.c.
n.c.
n.c.
5
GND
GND
GND
6
GND
GND
GND
7
GND
GND
8
GND
GND
9
+12V-AUD
+12V-AUD
+12V-AUD
IO
IO
IO
10
+12V-AUD
+12V-AUD
+12V-AUD
IO
IO
IO
11
+12V
+12V
+12V
12
+12V
+12V
+12V
13
+12V_AL
+12V_AL
+12V_AL
14
+12V_AL
+12V_AL
+12V_AL
12V
Q711
12V
Q401
A04449-7A
Figure 7-4 DC/DC converters (for 32"/39"/40"/42"/47"/50"PxG4109/7x)
CN9904
CN8101
CN8101
to SSB
to panel
to panel
14
12
8
n.c.
VLED-
VLED+
n.c.
VLED-
VLED+
GND
n.c.
LED3
GND
n.c.
LED4
GND
GND
n.c.
n.c.
GND
GND
n.c.
n.c.
+12V-AUDIO VLED-
-
+12V-AUDIO VLED-
-
+12V
n.c.
-
+12V
VLED-
-
+12_AL
-
-
+12_AL
-
-
•
+3V3, genenal supply voltage
•
+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 NT72567
•
+3V3-DVBS, clean voltage for DVB-S2 channel decoder
•
+1.1V, clean voltage for Demod channel decoder
Figures gives a graphical representation of the DC/DC
converters with its current consumptions :
PVDD
AMP STA381BWTR
PANEL_VCC
back to
div. table
CN8501
CN8501
to panel
to panel
8
12
n.c.
LED1-
n.c.
LED1-
VLED-
n.c.
VLED-
n.c.
n.c.
n.c.
n.c.
n.c.
-
LED1-
-
LED1-
-
n.c.
-
LED1+
-
-
-
-
19620_202_140111.eps
140111
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