Front Side Component Voltages - LG 42LH50 Training Manual

42LH50 MAIN (FRONT SIDE) SIMICONDUCTORS
IC102 BCM Reset IC2400
Pin Pin
1 3.3V [1] Gnd
3
2 2
2 Gnd [2] 5V
1
3 3.29V [3] Gnd
[4] 0.8V
IC2101 RGB [5] 0.9V
Pin Sync [6] 3.23V
[1] 1.9V [7] [8] 1.2V
[2] 1.9V
[3] 4.38V IC2401
[4] 1.9V Pin
[5] 1.9V [1] 0V
[6] 4.5V [2] 12V
[7] Gnd [3] Gnd
[8] n/c [4] 0.8V
[9] 1.9V [5] 0.8V
[10] 1.9V [6] 5V
[11] 4.38V [7] 5V
[12] 1.9V [8] 5V
[13] 1.9V
[14] 5V IC2402
Pin
IC2300 1.8V Amp [1] Gnd
Pin Audio [2] 5V
1 Gnd [3] Gnd
2 1.8V [4] 0.8V
3 3.3V [5] 1V
[6] 4.98V
IC2103 RS232 [7] 1.89V
Pin Rx/Tx [8] 1.89V
[1] 3.25V
[2] 3.27V IC2403
[3] n/c Pin
[4] n/c [1] Gnd
[5] n/c [2] 12V
[6] Gnd [3] Gnd
[7] n/c [4] 0.8V
[8] Gnd [5] 0.9V
[9] Gnd [6] 3.23V
[10] 4.76V [7] 3.37V
[11] 4.76V [8] 3.37V
[12] 3.17V
[13] 3.3V
[14] 3.3V
[15] 3.3V
[16] 5V
D500 IC501 shunt LD2400
Pin Pin
A1 0V A1
C 3.1V C
A2 3.29V A2 1.62V
1.2V Core IC2404 3.3V-ST
Pin
3.3V-VDDP-ST
1 Gnd
2 3.3V
3 5V
IC2405 1.8V-DDR
Pin Reg
[1] 0.58V
5V USB [2] 1.8V
Fan [3] 3.3V
IC2406 1.26V-MEMC
Pin Reg
[1] n/c
[2] 1.87V
[3] 1.87V
[4] n/c
[5] n/c
1.8V-MEMC [6] 1.27V
[7] 0.8V
[8] Gnd
IC2407 A2.5V Reg
Pin
[1] n/c
[2] 3.23V
[3] 3.3V
[4] n/c
[5] n/c
3.3V/A3.3V [6] 2.53V
Reg [7] 0.53V
[8] Gnd
IC2408 1.8V-DDR
Pin Reg
[1] Gnd
[2] 3.3V
[3] 0.89V
[4] 0.9V
[5] 1.8V
[6] 3.3V
[7] 1.8V
[8] 0.89V
A3.3V OK ZD3400 IR Clamp
Pin
n/c C 2.68V
Gnd A Gnd
51
IC2500 9V Reg IC501 HDMI Remote
Pin for Tuner Pin
[1] 12.3V [1] 3.3V
[2] 8.9V [2] 3.3V
[3] Gnd [3] n/c
[4] n/c
IC2502 5V Reg [5] n/c
Pin for Tuner [6] 3.19V
[1] 8.98V
[2] 1.9V Q2401 24V PWR Sw
[3] 5V Pin
[4] 0V B 0.59V
[5] 0V C 0V
E 0V
IC3200 Micro Reset
Pin Q2402 5V Sw Ctl
[1] 3.3V Pin
[2] Gnd B 0.59V
[3] 0.6V C 0V
E 0V
IC3201 uP EEPROM Q2404 LVDS Sw Ctl
Pin Pin
[1] Gnd B 0.59V
[2] Gnd C 0V
[3] 3.29V E 0V
[4] Gnd
[5] 3.3V Q2405
[6] 3.3V Pin
[7] 0V [1] 21.28V
[8] 3.3V [2] 12.31V
[3] 12.31V
IC3211 Power Det [4] 6V
Pin [5] 12.31V
[1] Gnd [6] 12.31V
[2] 3.3V [7] 21.28V
[3] 3.36V [8] 21.28V
IC3400 USB 5V
Pin
[1] 5V
[2] 0V
[3] 3.3V
[4] 3.3V
[5] 0V
[6] 5V
ZD3401 Key2 Clamp ZD3402 Key1 Clamp
Pin Pin
C 3.3V A
A Gnd C 3.3V
Q2406
5V and
Pin
LVDS 12V Switch
[1] 5V
[2] 0.2V
[3] 12.3V
[4] 6V
[5] 12.3V
[6] 12.3V
[7] 5V
[8] 5V
Q2405
Q2407 POW On/Off2
Pin
B 3.37V
C 4.7V
E 5V
Q2406
Q2408 INV Ctl
Pin
B 0V
C 4.55V
E 0V
Q2406
Q3204 Micro
Pin Reset Sw.
B 0.59V
C 0V
E 0V
24V PWR
12V PWR
Gnd