Circuit Descriptions
7.
7.2
Power Supply
7.2.1
Power Supply Unit
Before checking other parts first check whether fuse on the
PSU is not broken. Always replace a defective fuse with one
with the correct specifications! This part is available in the
regular market.
Consult the Philips Service web portal for the order codes of the
boards.
In this manual, no detailed information is available because of
design protection issues.
The output voltages to the chassis are:
•
+5V-STANDBY (Stand-by mode only)
•
+12V (on-mode)
•
+24V for audio circuit
7.2.2
Diversity
The diversity in power supply units is mainly determined by the
diversity in screen sizes.
7.3
Power Management
Figure 7-3 Power Architecture
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; connector CN701
pin 10.
•
+12V, input from the power supply for T-con, audio amp in
SCART out; connector CN701 pins 3 and 4.
•
+24V, input from the power supply for
audio (in active mode); connector CN701 pins 8 and 9.
19090_207_110421.eps
110509
POWER SWITCH
G5250M
1T1U
USB multi-media
USB PWR
+5V_USB
+5V_USB
USB_PWR_EN
+5V_SW
LDO
POWER SWITCH
AON4421
POWER SWITCH
AON4421
DV11
PANEL_VCC
65 mA
100 mA
80 mA
LDO
G111763
Uf
500 mA
AV33
400 mA
2250 mA
740 mA
+5V_STB
+5V_STB
+5V_STB
MAIN CHIP
MT5395
MT5135
AV12
AV12
DVB-C/T DEMOD
LCD PANEL T-CON
TCON
CIRCUIT
AV12
PCMCIA CARD
MT5135
DVB-C/T DEMOD
DV33
TMDS SWITCH
TMDS351
+24V
+12V
+5V_SW
LDO
G9141
T11U
MT5135
DVB-C/T DEMOD
LDO
G1117-
33T63Uf
MAIN CHIP
MT5395
DV33SB
DV33SB
Power Switch
G5250
M1T1U
CI_PWR_EN
CI CARD
PWR
CI2_VCC
30 mA
PANEL_VCC_ON/OFF
200 mA
+5V_SW
STB_PWR5V
BUCK CONVERTER
TPS4418
RTE
MAIN CHIP
MT5395
DV11 & DV10
VCCK
DV33 &
AV33
OPWRSB
AUDIO AMP
STA339B
WTR
DV33 & AV33
G1084-
33TU3Uf
+5V_SW
MAIN CHIP
MT5395
PTCR
RF TUNER
ENV57U09D5F
/TDTK-G731D
+5V_SW
TPS4319
RTE
MT5395
MAIN CHIP
DDRIII
NT5TU64M16
900 mA
DV15_DDR
DV15_DDR
BUCK CONVERTER
+5V_SW
AS7805DTR-E1
+5V_SW
5135_DV10
5135_DV10
DV15_DDR