Main (Digital) Board - LG 32LG40 Training Manual

CIRCUIT DeSCRIPTIONS

MAIN (DIGITAL) BOARD

3
2
L
G
4
0
MAIN (TOP) REGUlATOR ChECkS
IC201 IC201
PIN PIN
2 2
3 3 On/Off Control On/Off Control
7 7
8 8
IC304 IC304
PIN PIN
3,8 3,8
5,6,7 5,6,7
4 4 On/Off Control On/Off Control
IC400 IC400
PIN PIN
1 1
2 2
3 3
22 22
Fall 2008 LCD Training Fall 2008 LCD Training
USB Power USB Power
FUNCTION FUNCTION NAME NAME
IN IN +5V +5V
BCM DDR Power BCM DDR Power
OUT OUT USB_PWR_Out_1 USB_PWR_Out_1
OUT OUT +3.3V +3.3V
2.6V BCM 2.6V BCM
FUNCTION FUNCTION NAME NAME
OUT OUT DDRO_VTT DDRO_VTT
IN IN D2.6V_BCM D2.6V_BCM
DDRO_VTT DDRO_VTT
RESET GENERATOR TO IC401 (On Back) RESET GENERATOR TO IC401 (On Back)
FUNCTION FUNCTION NAME NAME
IN IN D3.3V_BCM D3.3V_BCM
Gnd Gnd Gnd Gnd
OUT OUT Reset (Lo-Hi) Reset (Lo-Hi)
IC405 IC405
STBY STBY RUN RUN PIN PIN FUNCTION FUNCTION
0V 0V 5V 5V 1 1
0V 0V 3.4V 3.4V 2 2
0V 0V 5V 5V 3 3
0V 0V 3.1V 3.1V
IC802 IC802
PIN PIN FUNCTION FUNCTION
1 1
STBY STBY RUN RUN
0V 0V 1.29V 1.29V 2 2
0V 0V 2.6V 2.6V 3 3
0V 0V 1.29V 1.29V
IC803 IC803
PIN PIN FUNCTION FUNCTION
1 1
STBY STBY RUN RUN
0V 0V 3.4V 3.4V 2 2
Gnd Gnd Gnd Gnd 3 3
0V 0V 3.39V 3.39V
RESET GENERATOR FOR Q400 RESET GENERATOR FOR Q400
NAME NAME STBY STBY
IN IN 3.3V_MICON 3.3V_MICON 3.41V 3.41V
Gnd Gnd Gnd Gnd Gnd Gnd
OUT OUT Reset (Lo-Hi) Reset (Lo-Hi) 0.6V 0.6V
+3.3V Regulator (3.3V TMDS_SW) +3.3V Regulator (3.3V TMDS_SW)
NAME NAME STBY STBY
Gnd Gnd +3.3V +3.3V 0V 0V
OUT OUT Gnd Gnd Gnd Gnd
IN IN +5V_SUB +5V_SUB 0V 0V
+9V Regulator +9V Regulator
NAME NAME STBY STBY
IN IN +12V +12V 0V 0V
Gnd Gnd Gnd Gnd Gnd Gnd
OUT OUT +9V +9V 0V 0V
RUN RUN
3.41V 3.41V
Gnd Gnd
0.6V 0.6V
RUN RUN
5V 5V
Gnd Gnd
3.2V 3.2V
RUN RUN
12V 12V
Gnd Gnd
9V 9V