Semiconductors - LG 55LW5600 Troubleshooting Manual

55LW5600 MAIN (FRONT SIDE) SIMICONDUCTORS
IC103 NVRAM IC505 (+3.3V_NORMAL)
Pin for USB Pin Regulator
[1] n/c [1] 0V (Gnd)
[2] 0V [2] 11.96V (In)
[3] 3.34V [3] 0V (Gnd)
[4] 0V [4] 0.8V
[5] 3.22V [5] 0.79V
[6] 3.22V [6] 3.47V (PWR On/Off2_2)
[7] 0V (Gnd) [7] 3.35V (Out)
[8] 3.34V [8] 3.35V (Out)
IC501 +0.9V_CORE IC506 Switched
Pin DC to DC Pin 5V for USB 2
[1] 3.17V [1] 0V (Gnd)
[2] 0.59V [2] 11.98V (In)
[3] 0.44V [3] 0V (Gnd)
[4] 11.95V [4] 0.79V
[5] 0V [5] 3.48V
[6] 5.33V [6] 3.48V (PWR On/Off2_1)
[7] 4.6V [7] 4.96V (Out)
[8] 5.81V [8] 4.96V (Out)
[9] 0.95V
[10] 1.36V IC507 (+5V_NORMAL)
Pin Regulator
IC504 +2.5V BCM [1] 0V (Gnd)
Pin Regulator [2] 11.98V (In)
[1] n/c [3] 0V (Gnd)
[2] 4.92V (En) [4] 0.79V
[3] 3.47V (In) [5] 3.48V
[4] 3.49V (Ctl) [6] 3.48V (PWR On/Off2_1)
[5] n/c [7] 4.96V (Out)
[6] 2.57V (Out) [8] 4.96V (Out)
[7] 0.6V
[8] 0V (Gnd)
55LW5600 MAIN (BACK SIDE) SIMICONDUCTORS
IC502 Power Det Gen IC5202 SPI
Pin (For +12V) Pin FLASH
[1] 0V (Gnd) [1] 0.43V
[2] 3.8V (In) [2] 3.29V
[3] 3.73V (Out) [3] 3.29V
[4] 0V (Gnd)
IC503 Power Det Gen [5] ??
Pin (For +24V) [6] ??
[1] 0V (Gnd) [7] 3.29V
[2] 3.7V (In) [8] 3.29V (3.3V_FRC in)
[3] 3.73V (Out)
Q506 PANEL_VCC
IC601 EEPROM Pin
Control 2nd Driver
Pin Micro B 0.67V
[1] 0V (Gnd) [1] 0V (Gnd) C 0V C 0V
[2] 0V (Gnd) E Gnd
[3] 3.49V
[4] 0V (Gnd) Q507 PANEL_VCC
[5] 3.49V Pin Switch
[6] 3.49V S 11.97V (In)
[7] 0V (Gnd) G 1.8V (Enable)
[8] 3.50V (Vcc In) D 11.94V (Out)
IC508 (+1.5V_DDR) IC802 EDID Data
Pin Regulator Pin
[1] 3.46V [1] 0V (Gnd)
[2] n/c [2] 0V (Gnd)
[3] 3.46V (In) [3] 0V (Gnd)
[4] 3.49V (PWR On/Off1) [4] 0V (Gnd)
[5] 0V (Gnd) [5] 4.73V
[6] 3.31V [6] 4.73V
[7] 0.79V [7] 4.73V
[8] 1.5V (Out) [8] 4.73V (Vcc In)
IC801 RGB IC803
Pin Data Buffer Pin
[1] 1.81V [1] 3.5V
[2] 1.81V [2] 5.64V
[3] 3.72V [3] 0V
[4] 1.8V [4] 0V
[5] 1.8V [5] (-5.56V)
[6] n/c (4.44V) [6] (-5.59V)
[7] 0V (Gnd) [7] n/c (5.64V)
[8] n/c (4.43V) [8] n/c (0V)
[9] n/c (1.79V) [9] n/c (3.49V)
[10] n/c (1.79V) [10] n/c (0V)
[11] 3.72V [11] n/c (3.34V)
[12] 1.81V [12] 3.48V
[13] 1.81V [13] 0V
[14] 5V (Vcc In) [14] (-5.59V)
[15] 0V (Gnd)
[16] 3.5V (Vcc In)
Q101 RGB_DDC_SDA Q710 CEC Remote
Pin FET Buffer Pin HDMI CEC
[B] 0V (Gnd) [B] 3.47V
[G] 3.3V [G] 3.51V
[S] 4.74V [S] 3.47V
[D] 3.34V [D] 3.49V
Q102 RGB_DDC_SCL Q801
Pin FET Buffer Pin
[B] 0V (Gnd) B 0V
[G] 3.3V C 3.35V
[S] 4.74V E Gnd
[D] 3.34V
Q904 IR Wireless Pass
Q504 Q504 INV_CTL (Drv_On) INV CTL (Drv On) Pin Pin 2nd Driver 2nd Driver
Pin Driver B 0.02V
B 0V (INV ON) En C 3.48V
C 3.28V (Out) E Gnd
E Gnd
Q906 IR Wireless Pass
Q505 PANEL_VCC Pin
Pin B 0.57V
Control 1st Driver
B 0V C 0V
C 0.68V E Gnd
E Gnd
IC1203 EDID Data
PC 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)
RS232 IC1204 EDID Data
Routing Pin PC
[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)
[8] n/c (0V)
IC2103 (+1.26V_TU)
Pin Regulator
[1] 0V (Gnd)
[2] 1.27V (Out)
[3] 3.33V (In)
Q2104 Tuner SIF
Pin (Sound) Buffer
B 0.23V
C 0V (Gnd)
E 0.93V
Q2106 Tuner Video
Earphone Pin (Analog) Buffer
Mute B 3.67V
C 0V (Gnd)
E 4.35V
Q5201 URSA Reset
Pin Driver
B 0.11V B 0.11V
C 3.33V
E 0V (Gnd)
Q5202 URSA
Pin Reset
1st Driver G 3.33V
S 3.33V
D 0V (Out)
IC5401 (+1.26V_FRC) Q503 0.9V FET
Pin Regulator Pin Switch
[1] 0V (Gnd) [1] 0.95V
[2] 11.85V (Vcc In) [2] 0.95V
[3] 0V (Gnd) [3] 0.95V
[4] 0.8V (FB) [4] 1.36V
[5] 0.7V [5] 11.96V
[6] 3.29V (Enable) [6] 11.96V
[7] 1.29V (Out) [7] 11.96V
[8] 1.29V (Out) [8] 11.96V
IC5402 (+3.3V_FRC) Q508 0.9V FET
Pin Regulator Pin Switch
[1] Under Shield [1] 0V (Gnd)
[2] Under Shield [2] 0V (Gnd)
[3] Under Shield [3] 0V (Gnd)
[4] Under Shield [4] 4.6V
[5] 0.8V [5] 0.95V
[6] 3.45 (PWR On/Off2_2) [6] 0.95V
[7] 3.3V [7] 0.95V
[8] 3.3V [8] 0.95V
Q501 RL_ON (PWR_On)
Pin 1st Driver
B 0.64V
C 0V
E Gnd
Q502 PWR_ON
Pin Switch
[1] 3.5V (In)
[2] 0.67V
[3] 2.62V (Out)
D707 5V Pull-Up to D713 Bias for Q710
Pin DDC_SCL/SDA_1 Pin HDMI CEC
A1 4.96V A1 0V
C 5V C 3.45V
A2 0V A2 3.5V
D708 5V Pull-Up to D810 5V Routing to
Pin DDC_SCL/SDA_3 Pin IC802 RGB EDID
A1 4.96V A1 4.73V
C 5V C 5.01V
A2 0V A2 0.07V
D710 5V Pull-Up to
Pin DDC_SCL/SDA_2
A1 4.96V A1 4.96V
C 5V
A2 0V
D711 5V Pull-Up to
Pin DDC_SCL/SDA_4
A1 4.96V
C 5V
A2 0V
Q1001 Wireless Vcc
Pin Driver
B 0.02V
C 24.5V
E Gnd
On when wireless dongle connected
Q1002 Wireless Vcc
Pin Switch
S 24.5V
G 24 5V G 24.5V
D 0V
On when wireless dongle connected
Q901 IR Buffer
Pin 2nd
B 0.02V
C 3.48V
E Gnd
Q902 IR Buffer
Pin 1st
B 0.57V
C 0.02V
E Gnd