Main Board (Front Side Regulators) Voltages - LG 42LG70 Training Manual

Main Board (Front Side Regulators) Voltages

Main Board (Front Side Regulators) Voltages
IC405 STBY
Function: Micro Reset control
Pins 1 0V
Pins 2 Gnd
Pins 3 0V
IC803 STBY
Function: 9V Regulator Also source for IC812
Pins 1 0V
Pins 2 Gnd
Pins 3 0V
IC812 STBY
Function: 5V-TU Regulator
Pin 1 0V
Pin 2 0V
Pin 3 0V
Pin 4 n/c
Pin 5 Gnd
RUN Label
3.3V Input 3.3VST-Micom
Gnd Gnd
0V Hi then Lo to Q400
RUN
12V Input
Gnd Gnd
9V Output
RUN Label
9V Input
3.3V On/Off Power-CTL 3.3V
5V Output
n/c n/c
Gnd Gnd
Q400 STBY
Function: Reset to Micro
B 0.59V
C 0V
E Gnd
Q900 STBY
Function: LVDS Switch
Pins 1,3 0V
Pins 2,4 0V
Pins 5-8 0V
Q901 STBY
Function: Turns on Q900 LVDS Switch
B 0V
C 0V
E 0V
March 2009
54
RUN Label
0.59V Input from IC405
0V Hi-Lo to IC407 pin 4
Gnd Gnd
RUN Label
12V Input
6V On/Off
12V Output LVDS 12V
RUN Label
0.7V LVDS-Panel-Control
0V On low/Off hi
0V Gnd
LCD DV 42LG70