Circuit Descriptions
7.
7.3
DC/DC Converters
The on-board DC/DC converters deliver the following voltages
(depending on set execution):
•
+5V2-STANDBY, permanent voltage for the Stand-by
controller, LED/IR receiver and controls; connector
CN9302/CN902 pins 2 and 3
•
+12V, input from the power supply for the panel common
(active mode); connector CN9302/CN902 pins 10 and 11
•
+24V, input from the power supply for audio amplifier,
connector CN9302/CN902 pins 5 and 6
•
+1V1, core voltage supply for MT5366; has to be started up
first and switched “off” last (diagram B01)
•
+1V2, supply voltage for power supply for the scaler IC
MT5366
•
+1V5, supply voltage for DDR2 (diagram B11)
•
+3V3, general supply voltage (diagram B01)
•
+5V-TUN, supply voltage for tuner (diagram B02)
•
+5V-USB, input intermediate supply voltage for USB
(diagram B01)
•
+3V3 from the power supply for the scaler IC MT5366
•
+3V3-DVBS, clean voltage for DVB-S2 channel decoder
•
+1V-DVBS, core voltage for DVB-S2 channel decoder.
Figures gives a graphical representation of the DC/DC
converters with its current consumptions:
Figure 7-4 DC/DC converters xxPFL35x7 series
7.4
Front-End Analogue and DVB-T, DVB-C;
ISDB-T reception
7.4.1
Front-End Analogue
The Front-End for the analogue tuner consist of the following
key components:
•
ENV57U09D5F
•
MT5366IVGG/B
Below find a block diagram of the front-end application for
analogue.
Figure 7-5 Front-End analogue block diagram
7.4.2
DVB-T/C DTV
The Front-End for DVB-T/C DTV consist of the following key
components:
•
ENV57U09D5F
•
MT5366IVGG/B
•
Demodulator MT5135AE/A
Below find a block diagram of the front-end application for
DVB-T/C DTV.
Figure 7-6 Front-End DVB-T/C DTV block diagram
7.4.3
DVB-T2 DTV
The Front-End for DVB-T/C DTV consist of the following key
components:
•
ENV57U04D8F
•
MT5366IVGG/B
•
Demodulator MT5135AE/A
Below find a block diagram of the front-end application for
DVB-T2 DTV.
11
-
-
+5V
-
12
-
-
+5V
-
13
-
-
NC
-
Connector
3xPFL35x7
4xPFL35x7
no.
CN801
CN802
CN8503
CN9901
Descr.
to panel
to panel
to panel
Mains inlet
Pin
3
3
13
2
19240_203_120224.eps
120224
19240_204_120224.eps
120224
19240_205_120224.eps
120224