Daewoo DSJ-6000LN, Service Manual

Page: 15 / 39

- 14 -
2. Power Supply
2-1. Introduction
The POWER PCB is composed of 140W Power for 60 LCD PTV(DSJ-6000LN) as well as
the Power that makes 380V and 18V primary voltage for Ballast.
2-2. Block Diagram(attach)
2-3. Power Supply Component
(1) Input Power : 100V ~ 240VAC, 50/60Hz
(2) Consumption Power : 270W
(3) Power Supply for the secondary side : See the table below.
No. location voltage Function Current remarks
1 T802 D5V Main and Video/Engine Power 1,000mA F/B Line
2 T802 33V Tuning B+ 3mA
3 T802 A5V Main and Video Power 1,000mA
4 T802 12V Main and Video Power 300mA
5 T802 9V Main and Video Power 80mA
6 T802 18V Ballast and PFC Control Power 150mA Primary
7 L805 380V Ballast Power 470mA Primary
8 T802 17.5V Engine Power 300mA
9 T803 7V/10V Engine Fan Power 1,000mA 10V (more than 45 degree
of Engine temperature
10 T803 +15V Audio Power 3,000mA
11 T803 -15V Audio Power 3,000mA
12 T801 ST5V Stand-By Power 600mA
2-4. Description of Operation
(1)Power Supply and Stand-by Power
(1-1) The voltage coming through Bipolar Power Code (PC801) passes through the
Line Filter composed of EMI Filter (L801, L802), X-Capacitor (C801, C803,
C806), and Y-Capacitor (C822, C823) and is rectified and smoothed in the Bridge
Diode (D803, D806, D831, D832) through the Mimetal that is the P303E
Temperature Sensor (Power OFF when Lamp Temperature 125 ~ 135).
(1-2) The smoothed voltage is supplied to the TOP232P that is STAND-BY POWER
IC(1804), and the TRANS secondary winding supplies STAND-BY Power (5V)
for U-COM.