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Circuit Descriptions, Abbreviation List, and IC Data Sheets
EN 139
Q523.1U LA
9.
9.2.1
42" Sets
The 42" sets in this chassis come with a serviceable Power
Supply Unit. This supply unit delivers the power for the display,
AmbiLight unit and the optional panel (bold-on) for Dynamic
Frame Insertion (DFI). Refer to chapter “Circuit Diagrams and
PWB Layouts”, diagrams A1 to A3.
The power supply for the SSB and Audio part are located on
the SSB itself. For a description of the on-board power supply,
refer to Section “On-board Platform Supply”.
The supply unit delivers the following voltages to the chassis:
•
12 V for bold-on panel (optional), LCD panel and AmbiLight
(optional).
•
24 V for lamp inverters.
For a block diagram see figure “Block Diagram LCD Power
Supply 42”.
Figure 9-4 Block diagram LCD Power Supply 42"
A Power-Good circuitry is built around items 7015 and 6076.
The so-called POWER-GOOD line indicates the correct
functioning of the 12 V supply. The voltage on this line is 5 V if
the voltage on the 12 V output drops below 10 volt. Refer to
figure “Power-Good circuitry”.
Figure 9-5 Power-Good circuitry
1P02
1P22
for bold on
1P15
12V
for lcd display
1P11
5A
1M90
mains
for ambilight
1M09
1308
1P11
24V
for lamp inverters
1314
8A
1315
or
1316
198V
1317
0.7A
1319
1320
control signals
1P11
mains filter
mains
harmonics
coil
relay
rectifier for EUR
doubler/rectifier
for USA
resonant
trafo's
and bridge
frequency
controller
feedback
on
off/standby
power-good = 5V if 12
V is >10 V
protections :
overvoltage
overcurrent
softstart
H_16770_105.eps
260307
Power_good
H_16770_106.eps
260307