Philips 4000 series - Page 28

Circuit Descriptions
EN 28 TPM9.2L LA7.
2012-Mar-30
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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 DDR3 (diagram B07)
• +3V3, general supply voltage (diagram B01)
• +5V-TUN, supply voltage for tuner (diagram B14)
• +5V-USB, input intermediate supply voltage for USB
(diagram B04)
• +3V3 from the power supply for the scaler IC MT5366
Figures gives a graphical representation of the DC/DC
converters.
Figure 7-3 DC/DC converters xxPFL4xx7 series
7.4 Front-End Analogue and
ISDB-T reception
7.4.1 Front-End Analogue
The Front-End for the analogue tuner consist of the following
key components:
• SUT RB211 Dual input Tuner
• CXD2828ER demodulator
The system makes use of the following features:
• 5 V power supply for antenna switching
• 2.5 V power supply for the built in PF IC
• IF AGC range from 0 to 1.8 V
• ISBD-T, IF frequency of 4.0 MHz
• RF IC system reset, (HIGH during normal running state)
Below a block diagram of the front-end application for
SAW-less analogue TV reception is shown.
Figure 7-4 Front-End Saw-less analogue mode block diagram
Below a block diagram of the front-end application for DVB-T/C
digital TV reception is shown.
Figure 7-5 Front-End ISDB-T digital TV mode block diagram
7.5 HDMI
In this platform, the Silicon image Sil9185ACTU HDMI
multiplexer is implemented. Refer to figure 7-6 HDMI input
configuration for the application.
4 LED6 PS_ON LED-15 PS_ON
5 LED2 +24V LED-14 +24V
6 n.c. +24V - +24V
7n.c.GNDVLEDGND
8LED5GND- GND
9LED1GND- GND
10 LED4 +12V - +12V
11 n.c. +12V - +12V
12 VLED DIM - DIM
13 - ON/OFF - ON/OFF
Connector
32PFLxxx7 42PFLxxx7
no. CN8101 CN9302 CN8503 CN902
Descr. to panel to SSB to panel to SSB
Pin CN8101 CN9302 CN8503 CN902
19240_203_120224.eps
120224
19260_203_120327.eps
120328
RF Tuner for
PAL/ISDB-T
IF for PAL/SECAM
IF for ISDB_T
I
2
C
IF AGC
SUT-RB211T
MT5366CVNG
CXD2828
ISDB_T
Demodulator
Standby
19260_204_120327.eps
120328
RF Tuner for
PAL/ISDB-T
IF for ISDB_T
I
2
C
I
2
C
IF AGC
SUT-RB211T
MT5366CVNG
CXD2828
On
ISDB_T
Demodulator
TS DATA
OUT(SERIAL)
TS DATA
OUT(SERIAL)