Circuit Descriptions
7.
7.2
Power Supply
7.2.1
Power Supply Unit
All power supplies are a black box for Service. When any of
these power supplies is defective, a new board must be
ordered and the defective one must be returned, unless the
main fuse of the board is 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.
7.3
General Power Architecture
For the power architecture refer to figure
For start-up steps (for trouble-shooting), refer to figure
. The
start-up sequence is marked with numbers in red.
Figure 7-5 General power architecture
Figure 7-6 Functional supply overview
19280_103_120504.eps
120504
AC-in
1M99/1M11
1M95
1M09
1308
1316
1319
Display
Ambi-light
SSB
1M54
19210_075_120504.eps
120504
PSU
STANDBY
+12V
PLF
Fusion
SoC
12V
Undervoltage
detect
POWER-OK
3V3stby
DETECT12V
AC in
Tcon
DC-DC
LCD-PWR-ONn
DC-DC
converters
LED driver
+3V3-STANDBY
Ethernet
PHY
switch
+3V3-LAN
SPLASH-ON
STANDBYn
ENABLE-WOLAN
internal
Wifi dongle
AL
+3V3AL
switch
+3V3
ENABLE-3V3-AMBI