LG 42LH90 Manual page 73

42LH90 Main (Back Side) Component Voltages
Reset Gen
IC103
Pin Mstar IC100
[1] Gnd
[2] 0V
[3] 3.3V
RGB (PC)
IC104
Pin EEPROM
[1] Gnd
[2] Gnd
[3] Gnd
[4] Gnd
[5] 3.22V
[6] 3.22V
[7] 0V
[8] 3.22V
Power Det
IC107
Pin Gen
[1] Gnd
[2] 3.9V
[3] 3.28V
+3.3V_ST
IC702
+3.3V_AVDD_MPLL
3
Pin Regulator
[1] Gnd
[2] 3.29V
1 3 2
[3] 5.11V
+3.3V_ST
IC703
Pin Regulator
[1] 0V
[2] 1.8V
[3] 3.21V
SPI Flash
IC800
Pin
[1] 0.12V
[2] 1.13V
[3] 3.26V
[4] Gnd
[5] 0.06V
[6] 1.2V
[7] 3.27V
[8] 3.27V
9V Reg
IC1003 IC3505
Pin to IC1002
[1] 12V
[2] Gnd
[3] 8.9V
For Tuner Voltage 5V
Q105
RGB
IC1200
Pin EEPROM
[1] Gnd
[2] Gnd
[3] Gnd
[4] Gnd
Q600
[5] 4.82V
[6] 4.82V
[7] 4.82V
[8] 4.82V
RS232
IC1201 Q703
Pin Rx/Tx
[1] 3.3V
[2] 5.56V
[3] 0.02V
[4] 0.03V
[5] 5.46V
Q704
[6] 5.5V
[7] 5.5V
[8] 0V
[9] 3.29V
[10] 3.24V
[11] 0.02V
Q705
[12] 3.29V
[13] 0V
[14] 5.5V
[15] Gnd
[16] 3.29V
Q1000
USB +5V
IC1202
Pin Switch
[1] 4.95V
[2] Gnd
[3] 3.21V
[4] 4.95V
[5] 0V
[6] 4.95V
73
Reset Gen
Q1001
Pin for IC3502 Pin
[1] 3.3V B 3.09V
[2] Gnd C 0V
[3] 3.22V E 3.72V
PWR On Delay
D102
Pin Q2405 Pin
B 0V A1 0.047V
C 1.95V C 0.089V
E Gnd A2 0V
Audio Mute
D500
Pin Switch Pin
B 0.08V A1 3.25V
C 3.26V C 3.12V
E Gnd A2 0V
5V Switch
D1223
Pin Control Pin
B 0.6V A1 0V
C 0.03V C 4.82V
E Gnd A2 5.11V
12V LVDS
Pin Switch Control
B 0.05V
C 0.65V
E Gnd
12V LVDS
Pin Switch
B 0.65V
C 0.0V
E Gnd
Tuner SIF
Pin Buffer
B 2.4V
C 0V
E 3.85V
Tuner Video
Buffer
Audio Mute
Routing
Shunt for
IC501
5V Routing
for IC1200