Philips TPM9.1LA Service Manual page 27

3xPFL35x7
no. CN801
Descr. to panel
Pin 3
11 -
12 -
13 -
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
Connector
42PFL35x7
CN802 CN8503 CN9901
to panel to panel Mains inlet
3 13 2
- +5V -
- +5V -
- NC -
19240_203_120224.eps
Circuit Descriptions
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.
SUT-RB211T
RF Tuner for
PAL/ISDB-T
Demodulator
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.
SUT-RB211T
RF Tuner for
120224
PAL/ISDB-T
Demodulator
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
configuration
back to
div. table
TPM9.1L LA
IF AGC
IF for PAL/SECAM
2
I C
IF for ISDB_T
CXD2828
ISDB_T
Standby
IF AGC
2
I C
IF for ISDB_T
TS DATA
OUT(SERIAL)
TS DATA
CXD2828
OUT(SERIAL)
ISDB_T
I 2 C
On
for the application.
7. EN 27
MT5366CVNG
19260_203_120327.eps
120328
MT5366CVNG
19260_204_120327.eps
120328
7-6 HDMI input
2012-Mar-30