LG 42PQ30 Training Manual page 36

42PQ30 Power Supply Turn On Sequence
42PQ30 Power Supply Turn On Sequence
AC In
1
Stand
By 5V Reg
AC Stand
Det. By 5V
3 2
Turns on
Red LED
2
5
Both LEDs On
AC
Looks Amber
Det.
Resets
Main Board
3
POWER SUPPLY
(SMPS)
In Stand-By In Run (Relay On)
Primary side is Primary side is
90V 370V
5
12V/16V
Regulators
12V
Relay
5V
Det. On
5 5 6
12V
Video
5V
Reg
MAIN PWB
At point
TV is in
Relay On
Turns on
Stand-By state.
Green LED
Energy Star
5
compliant.
Less than 1 Watt
7
Microprocessor or
11
BCM
M5V
Reg
7
Vs
Reg
12
Va
Reg
17V
M5V Vs
On On
6 7
11
16V
Audio
3
36
Y-SUS PWB
8
M5V (DC Voltage)
Also develops 15V
15
Vs/Va (DC Voltage)
Va Vs
13
15V
15
Vs from
Y-SUS
Z-SUS
PWB
Va From Y-SUS
14
X PWBs
Power
On
Remote
4
Or Key
9
5V
5V and 15V
From Y-SUS to
Control PWB
15V 5V
10