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

55LW5600 Main (Back Side) Component Voltages
IC502 Power Det Gen
Pin (For +12V)
[1] 0V (Gnd)
[2] 3.8V (In)
[3] 3.73V (Out)
IC503 Power Det Gen
Pin (For +24V)
[1] 0V (Gnd)
[2] 3.7V (In)
[3] 3.73V (Out)
IC601 EEPROM
Pin Micro
[1] 0V (Gnd)
[2] 0V (Gnd)
[3] 3.49V
[4] 0V (Gnd)
[5] 3.49V
[6] 3.49V
[7] 0V (Gnd)
[8] 3.50V (Vcc In)
IC5202 SPI
Pin FLASH
[1] 0.43V
[2] 3.29V
[3] 3.29V
[4] 0V (Gnd)
[5] ??
[6] ??
[7] 3.29V
[8] 3.29V (3.3V_FRC in)
Q101 RGB_DDC_SDA Q710
Pin FET Buffer
[B] 0V (Gnd)
[G] 3.3V
[S] 4.74V
[D] 3.34V
Q102 RGB_DDC_SCL
Pin FET Buffer Q801
[B] 0V (Gnd)
[G] 3.3V
[S] 4.74V
[D] 3.34V
Q504 INV_CTL (Drv_On) Q904
Pin Driver
B 0V (INV ON) En
C 3.28V (Out)
E Gnd
Q505 PANEL_VCC
Pin Q906
Control 1st Driver
B 0V
C 0.68V
E Gnd
Q506 PANEL_VCC
Pin Q1701
Control 2nd Driver
B 0.67V
C 0V
E Gnd
Q507 PANEL_VCC
Pin Switch Q2104
S 11.97V (In)
G 1.8V (Enable)
D 11.94V (Out)
CEC Remote Q2106
Pin HDMI CEC Pin
[B] 3.47V B 3.67V
[G] 3.51V C 0V (Gnd)
[S] 3.47V E 4.35V
[D] 3.49V
Q5201
Earphone Pin
Pin Mute B 0.11V
B 0V C 3.33V
C 3.35V E 0V (Gnd)
E Gnd
Q5202
IR Wireless Pass Pin
Pin 2nd Driver G 3.33V
B 0.02V S 3.33V
C 3.48V D 0V (Out)
E Gnd
D707
Pin
IR Wireless Pass A1 4.96V
Pin 1st Driver C 5V
B 0.57V A2 0V
C 0V
E Gnd D708
Pin
AMP_MUTE A1 4.96V
Pin Pin 19 IC1702 C 5V
B 0V A2 0V
C 3.36V
E Gnd D710
Pin
Tuner SIF A1 4.96V
Pin (Sound) Buffer C 5V
B 0.23V A2 0V
C 0V (Gnd)
E 0.93V
71
Tuner Video D711 5V Pull-Up to
(Analog) Buffer Pin DDC_SCL/SDA_4
A1 4.96V
C 5V
A2 0V
URSA Reset D713 Bias for Q710
Driver Pin
A1 0V
C 3.45V
A2 3.5V
URSA D810 5V Routing to
Reset Pin IC802 RGB EDID
A1 4.73V
C 5.01V
A2 0.07V
5V Pull-Up to
DDC_SCL/SDA_1
5V Pull-Up to
DDC_SCL/SDA_3
5V Pull-Up to
DDC_SCL/SDA_2
June 2011 47LW5600 LCD-DV
HDMI CEC