Main (Front Side) Component Voltages - LG 55LW5600 Troubleshooting Manual

55LW5600 Main (Front Side) Component Voltages
IC103 NVRAM IC506
Pin for USB
[1] n/c
[2] 0V
[3] 3.34V
[4] 0V
[5] 3.22V
[6] 3.22V
[7] 0V (Gnd)
[8] 3.34V
IC501 +0.9V_CORE IC507
Pin DC to DC
[1] 3.17V
[2] 0.59V
[3] 0.44V
[4] 11.95V
[5] 0V
[6] 5.33V
[7] 4.6V
[8] 5.81V
[9] 0.95V
[10] 1.36V IC508
IC504 +2.5V BCM
Pin Regulator
[1] n/c
[2] 4.92V (En)
[3] 3.47V (In)
[4] 3.49V (Ctl)
[5] n/c
[6] 2.57V (Out)
[7] 0.6V
[8] 0V (Gnd) Q901
IC505 (+3.3V_NORMAL)
Pin Regulator
[1] 0V (Gnd)
[2] 11.96V (In)
[3] 0V (Gnd) Q902
[4] 0.8V
[5] 0.79V
[6] 3.47V (PWR On/Off2_2)
[7] 3.35V (Out)
[8] 3.35V (Out)
Switched IC801
Pin 5V for USB 2 Pin
[1] 0V (Gnd) [1] 1.81V
[2] 11.98V (In) [2] 1.81V
[3] 0V (Gnd) [3] 3.72V
[4] 0.79V [4] 1.8V
[5] 3.48V [5] 1.8V
[6] 3.48V (PWR On/Off2_1) [6] n/c (4.44V)
[7] 4.96V (Out) [7] 0V (Gnd)
[8] 4.96V (Out) [8] n/c (4.43V)
[9] n/c (1.79V)
(+5V_NORMAL) [10] n/c (1.79V)
Pin Regulator [11] 3.72V
[1] 0V (Gnd) [12] 1.81V
[2] 11.98V (In) [13] 1.81V
[3] 0V (Gnd) [14] 5V (Vcc In)
[4] 0.79V
[5] 3.48V IC802
[6] 3.48V (PWR On/Off2_1) Pin
[7] 4.96V (Out) [1] 0V (Gnd)
[8] 4.96V (Out) [2] 0V (Gnd)
[3] 0V (Gnd)
(+1.5V_DDR) [4] 0V (Gnd)
Pin Regulator [5] 4.73V
[1] 3.46V [6] 4.73V
[2] n/c [7] 4.73V
[3] 3.46V (In) [8] 4.73V (Vcc In)
[4] 3.49V (PWR On/Off1)
[5] 0V (Gnd)
[6] 3.31V
[7] 0.79V
[8] 1.5V (Out) Q1001 Wireless Vcc
Pin
IR Buffer B 0.02V
Pin 2nd C 24.5V
B 0.02V E Gnd
C 3.48V On when wireless dongle connected
E Gnd
Q1002 Wireless Vcc
IR Buffer Pin
Pin 1st S 24.5V
B 0.57V G 24.5V
C 0.02V D 0V
E Gnd On when wireless dongle connected
RGB IC803 RS232
Data Buffer Pin Routing
[1] 3.5V
[2] 5.64V
[3] 0V
[4] 0V
[5] (-5.56V)
[6] (-5.59V)
[7] n/c (5.64V)
[8] n/c (0V)
[9] n/c (3.49V)
[10] n/c (0V)
[11] n/c (3.34V)
[12] 3.48V
[13] 0V
[14] (-5.59V)
[15] 0V (Gnd)
EDID Data [16] 3.5V (Vcc In)
PC
IC1203 EDID Data
Pin PC
[1] 0V (Gnd)
[2] 4.96V (Vcc In)
[3] 4.96V (Vcc In)
[4] 3.34V (USB Ctl2)
[5] 3.17V
[6] 4.96V (Out)
[7] 4.96V (Out)
[8] n/c (0V)
IC1204 EDID Data
Pin PC
Driver [1] 0V (Gnd)
[2] 4.96V (Vcc In)
[3] 4.96V (Vcc In)
[4] 3.34V (USB Ctl1)
[5] 3.17V
[6] 4.96V (Out)
[7] 4.96V (Out)
Switch [8] n/c (0V)
69
IC2103 (+1.26V_TU) Q501
Pin Regulator Pin
[1] 0V (Gnd) B 0.64V
[2] 1.27V (Out) C 0V
[3] 3.33V (In) E Gnd
IC5401 (+1.26V_FRC) Q502
Pin Regulator Pin
[1] 0V (Gnd) [1] 3.5V (In)
[2] 11.85V (Vcc In) [2] 0.67V
[3] 0V (Gnd) [3] 2.62V (Out)
[4] 0.8V (FB)
[5] 0.7V Q503
[6] 3.29V (Enable) Pin
[7] 1.29V (Out) [1] 0.95V
[8] 1.29V (Out) [2] 0.95V
[3] 0.95V
IC5402 (+3.3V_FRC) [4] 1.36V
Pin Regulator [5] 11.96V
[1] Under Shield [6] 11.96V
[2] Under Shield [7] 11.96V
[3] Under Shield [8] 11.96V
[4] Under Shield
[5] 0.8V Q508
[6] 3.45 (PWR On/Off2_2) Pin
[7] 3.3V [1] 0V (Gnd)
[8] 3.3V [2] 0V (Gnd)
[3] 0V (Gnd)
[4] 4.6V
[5] 0.95V
[6] 0.95V
[7] 0.95V
[8] 0.95V
June 2011
RL_ON (PWR_On)
1st Driver
PWR_ON
Switch
0.9V FET
Switch
0.9V FET
Switch
47LW56500 LCD-DV