Philips 20PHH4109/88 Service Manual page 46

EN 46 7. TPN14.1E LA
12V
12V
5V-STB
7.4 Front-End Analogue and DVB-T, DVB-C;
ISDB-T reception
7.4.1 Front-End Analogue part
The Front-End for analogue tuner consist of the following key
components:
• TUNER EUROPE system ST03CS-2-E
• SCALER NT72567BG-BA LFBGA-576
Below find a block diagram of the front-end application for
analogue part.
ST03CS-2-E
2
I C
IF_AGC
Figure 7-10 Front-End Analogue block diagram
2014-Feb-21
Circuit Descriptions
PWR_12V_AUD
Depend on panel
POWER SWITCH
PWR_12V
PWR_12V AON4421
+5V_STB
Q750
PANEL_VCC_ON/OFF
BUCK CONVERTER
+5V_STB
DV11
STB_PWR5V RT8079
U701
PWR_ON
LDO
+5V_STB
LM1108SF DV33SB
BUCK CONVERTER
U704
RT7234
U707
POWER SWITCH
PWR_ON
+5V_STB +5V_SW
AON4421
Q701
PWR_ON
PWR_12V
PVDD
Q757
Q750
AON4421
Figure 7-9 DC/DC converters ( for 22"/24"/40"/47"Pxx4109/12)
2
I C
IF_AGC
NT72567BG
19530_208_130810.eps
130810
PWR_16_24V
+5V or +12V
<1820mA
1mA
<10mA
500 mA
LDO
+5V_SW G1117-33 +5V_TUNER
<230 mA
U201
POWER protect
+5V_SW VCC_CI
APL3511CBI-TRG
U102
CI_PWR_EN
LDO
G1084-33TU3Uf
+5V_SW
<170 mA DV33
U702
DC Convertor
+5V_SW
AP3417C DV15
<370 mA
U703
LDO
<290 mA
+5V_SW
AV25
G1117-25T63Uf
U705
BUCK CONVERTER
+5V_SW
AT1528P11U AVDD1V2
U706
AMP STA381BWTR
PANEL_VCC
7.4.2 DVB-T/C DTV part
The Front-End for DVB-T/C DTV part consist of the following
key components:
• TUNER EUROPE system ST03CS-2-E
• SCALER NT72567BG-BA LFBGA-576
Below find a block diagram of the front-end application for
DVB-T/C DTV part.
ST03CS-2-E
IF_AGC
Figure 7-11 Front-End DVB-T2 DTV block diagram
7.4.3 DVB-T2 DTV part
The Front-End for DVB-T2 DTV part consist of the following
key components:
back to
div. table
AUDIO AMP
ST381BWTR
PANEL_T-CON
PANEL
MAIN CHIP
NT72568
MAIN CHIP NAND FLASH
NT72568 K9F1G08U0D
-SIB0
USB PWR USB PWR
500 mA
SILICON TUNER
ST03CS-2-E
PCMCIA CARD
CI CARD PWR
MAIN CHIP
NT72568
MAIN CHIP <210 mA DDRIII
NT72568 DV15
K4B1G1646G-BCK0
MAIN CHIP
NT72568
MAIN CHIP
NT78820T
19530_207_130812.eps
2
I C
2
I C
IF_AGC
NT72567BG
19530_208_130810.eps
130812
130810