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Circuit Descriptions
EN 44 Q549.2E LA7.
2009-May-08
7.2 Power Architecture
Refer to figure Figure 7-3 for the power architecture of this
platform.
Figure 7-3 Power Architecture TV543/92 platform
7.2.1 Power Supply Unit
All power supplies are a black box for Service. When 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 Service website for the order codes of the boards.
In the TV543 Elite Core platform, for sets up to and including
47", the Integrated Power Board (IPB) - incl. inverter is used.
For sets of 52 " and 56", a conventional PSU (with additional
inverters) is used.
In this manual, no detailed information is available because of
design protection issues.
The output voltages to the chassis are:
• +3V3-STANDBY (standby-mode only)
• +12V (on-mode)
• +Vsnd (+24V) (audio power) (on-mode)
• +24V (bolt-on power) (on-mode)
• IPB: High voltage to the LCD panel (for sets up to and
including 47").
7.2.2 Diversity
Below find an overview of the different PSUs that are used:
Table 7-1 Supply diversity
18310_202_090317.eps
090317
Fuse
Fus e
Fus e
PSU
Display
Ambilight
V display
LCD
Power-on
24V
Standby
V backlight 24 V**
Audio proc
+ Class D
24 Vs
(+/-12 Vs opt)
+12V
Dual
DC/DC
+3V3
+1V2
+1V2
Platform
Power
Dual
DC/DC
2.5 V 1 %
voltage ref
+2V5 +2 V5
+1V8 +1 V8
+3V3F
+5V
+5 V
tuner
+5 V-T un
PNX5100
+1V2-PNX85XX
+5V
+3V3
+1V8-PNX5100
+1V8-PNX85XX
+2V5 (loc.Contr.FPGA)
+1V2-PNX5100
+5V-TUN
SSB
Bolt-on
V inverter 4kV*
Inverter*
Lamp On*
BL DIM*
Lamp On
BL DIM
Inverter**
Stby P
Enable-3V3
12V
Undervoltage
detect
Switches off
+3V3 and
+5V
*: present in inverterless displays
**: pr e sent in displays with internal inverter
Detect2
(12V sense)
AND
Detect1
+1 V2 +1V2 -STANDBY
+3V3 stby
24V** Power-OK
12VDisp
3V3stby
Boost control (Opt)
+3V3 (SSB
)
+1V8
Boost conv.
(opt)
+33V-TUN(analog)+33V
Supplier PSU Model Input Voltage Range
LGIT PLHL-T826A 32" High Mains (198- 265 Vac)
Delta
DPS-298CP A 37" High Mains (198- 265 Vac)
Delta DPS-411AP-3 A 56" High Mains (198- 265 Vac)