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.
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, but please note to always order the
correct replacement.
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 11 and 12.
•
+12V, input from the power supply for panel and tuner;
connector CN701 pins 3 and 4.
•
+24V, input from the power supply for audio (in active
mode); connector CN701 pins 8 and 9.
19170_207_110704.eps
111107
MAX9
U606
HP AMP
STA339BWTR
U602
AUDIO AMP
STA515W
U603
WOOFER AMP
5VSB
VCCK(1.2V)
BUCK (3A)
G5657F12U
U704
OPWRSB
AO4449
Q707
5V_SW
BUCK (3A)
TPS54319RTE
U701
DVDD3V3
BUCK (1.5A)
SC189ASK
U702
DDRV(1.5V)
LDO
G903T63UF
U705
B
S
3
V
3
B
S
V
5
AO4449
Q709
+12V
LVDS_PWR_EN
LDO
G9084TU3U
U7007
+12V
+B_5V
VCCK(1.2V)
NVRAM
CAT24C128YI
U405
NAND FLASH
HY27US08561A-TPCB
U403
Nor flash
MX25L6445
U404 (NC)
USB Connect
CN103
CN104
5VSB
5V_SW
HDMI SW
TMDS361BPAGR
U501
5VDD
5V_SW
Audio in /SW
CD4052
U102
AMUX_5V
EEPROM
CAT24C02YI
U105
Aud_3V3
+24V_AMP
Aud3V3
+24_AMP
LDO
G903T63UF
U607
Aud3V3
5V_SW
PANEL_VCC
60Hz
PANEL CON
CN414
+24V
+12V
5VSB
TUNER
5V_SW
+24_SW
FB603
VCCK (1.2V)
MT5301B
U401
AVDD1V2
ADAC_PWR
DDRV(1V5)
TU101
(ATV)
DDR2
NT5TU64M16DG-BD
1Gb U402
+12V
BUCK (3A)
AOZ1212AI
U703
DVDD3V3
DVDD3V3
DVDD3V3
AVDD3V3
+5V_TUNER
DV33SB
DVDD3V3
ASIC_3V3
De_mod
ATBM8848
U101(NC)
VDD33
+B_5V
V3.3
DV33_TMDS
HDMI EEPROM
M24C02
U502
U505
U506
5V_USB
5V_SW
VUSB_5V
D603
+24
+24_AMP
W
S
_
V
5
W
S
_
V
5
5V_SW
V1.2
3V3_BUCK
G903T63UF
U709 (NC)
G903T63UF
U707
G912T63U
U708(NC)
V3.3
V3.3
VDD1V2
BUCK (1.5A)
SC189ASK
U706
5V_SW
AO4449
Q708
STANDBY