LG 32LD350 Troubleshooting Manual page 69

32LD350 MAIN (FRONT SIDE) SIMICONDUCTORS
IC101 Serial Flash IC403 (+1.26V_VDDC)
Pin Memory Pin Regulator
[1] 0.05V [1] 0.79V
[2] 3.28V [2] 0V (Gnd)
[3] 2.26V [3] 3.37V (In)
[4] 0V (Gnd) [4] 4.47V
[5] 0V [5] 3.34V
[6] 0V [6] 1.3V (Out)
[7] 3.28V (B+) [7] 1.3V (Out)
[8] 3.28V (B+) [8] 2.96V (PWR On/Off2_1)
IC105 HDCP IC405 (+3.3V_NORMAL)
Pin EEPROM Pin Regulator
[1] 0V (Gnd) [1] 0V (Gnd)
[2] 0V (Gnd) [2] 11.92V (In)
[3] 3.3V (B+) [3] 0V (Gnd)
[4] 0V (Gnd) [4] 0.8V
[5] 0V [5] 0.84V
[6] 3.3V [6] 2.39V (PWR On/Off1)
[7] 0V (Gnd) [7] 3.35V (Out)
[8] 3.28V (B+) [8] 3.35V (Out)
IC401 5V Regulator IC406 (+5V_NORMAL)
Pin for USB Pin Regulator
[1] 11.9V (In) [1] 0V (Gnd)
[2] 5.09V (Out) [2] 11.92V (In)
[3] 5.09V (Out) [3] 0V (Gnd)
[4] 0V (Gnd) [4] 0.8V
[5] 3.25V (PWR On/Off1) [5] 0.84V
[6] 0.8V [6] 2.39V (PWR On/Off1)
[7] 5.05V [7] 4.98V (Out)
[8] 0V (Gnd) [8] 4.98V (Out)
32LD350 MAIN (BACK SIDE) SIMICONDUCTORS
IC103 Reset IC1100 Earphone
Pin Generator Pin
[1] Gnd [1] 2.14V
[2] 0V [2] 0V (Gnd)
[3] 3.39V [3] 0.02V
[4] 2.19V
IC104 EEPROM [5] 2.19V
Pin Mstar [6] 4.37V
[1] 0V (Gnd) [7] 2.19V
[2] 0V (Gnd) [8] 2.18V
[3] 0V (Gnd)
[4] 0V (Gnd) IC1104 Optical Audio
[5] 3.31V Pin
[6] 3.31V [1] 1.64V
[7] 0V (Gnd) [2] 3.29V
[8] 3.31V [3] 0V (Gnd)
[4] 0V (Gnd)
IC400 (+3.3V_AVDD_MPLL) [5] 3.29V
Pin Regulator
[In] 3.35V IC1105 EDID Data
[Gnd] Gnd Pin
[Out] 3.34V [1] 0V (Gnd)
[2] 0V (Gnd)
IC601 (+1.8V_Amp) [3] 0V (Gnd)
Pin Regulator [4] 0V (Gnd)
[1] Gnd [5] 4.7V
[2] 1.81V [6] 4.7V
[3] 3.31V [7] 4.7V
[8] 4.7V
IC408 Power_Det
Pin 24V, 12V, 3.5V D7703 3.5V Blocking
[1] 3.52V Pin for Q7703
[2] 3.35V [A1] 0V
[3] Gnd [A2] 3.37V
[C] 3.3V
IC407 (D1.8V) IC5001
Pin Regulator
[1] 0.8V
[2] 0V (Gnd)
[3] 3.38V
[4] 4.79V
[5] 3.35V Q100
[6] 1.76V (Out)
[7] 1.76V (Out)
[8] 2.36V (PWR On/Off1)
IC1000 (+1.2V_PVSB)
Pin Regulator Q1100
[1] n/c
[2] 3.26V (Enable)
[3] 3.26V (In)
[4] n/c
[5] n/c
[6] 1.81V (Out) Q1103-4
[7] 1.21V
[8] n/c
IC1450 5V Shot Protection
Pin for USB
[1] 0V (Gnd) Q1105
[2] 5V (In)
[3] 5V (In)
[4] 0V (USB-Ctl)
[5]
[6] 5V (Out)
[7] 5V (Out)
[8] n/c
IC1201 RS232 IC7702
Amp Pin Data Buffer
[1] 3.34V
[2] 3.48V
[3] 0V
[4] 0V
[5] (-5.37V)
[6] 5.39V
[7] (-5.37V)
[8] n/c (0V)
[9] n/c (3.39V)
[10] n/c (3.35V) Q401
Amp [11] n/c (0V)
[12] 3.35V
[13] 0V
[14] 5.47V
[15] 0V (Gnd)
[16] 3.37V Q402
IC7701 EDID Data
PC Pin HDMI2
[1] 0V (Gnd)
[2] 0V (Gnd)
[3] 0V (Gnd) Q405
[4] 0V (Gnd)
[5] 4.7V
[6] 4.7V
[7] 4.7V
[8] 4.7V
Q406
D7706 5V Routing
Pin for IC7702
[A1] 4.98V
[A2] 0V
[C] 4.69V
(+1.26V) for Tuner Q7702 HDMI 4
Pin Regulator Pin Det
[1] 3.3V (In) B 0.63V
[2] 1.26V (Out) C 0V
[3] 0V (Gnd) E Gnd
Write Protect for D1100 5V Routing
Pin IC101 Pin for IC1100
B 0V [A1] 0.07V
C 3.3V [A2] 4.98V
E Gnd [C] 4.37V
Earphone Mute D7705 5V Routing
Pin 1st Driver Pin for IC7701
B 0V [A1] 0V
C 2.26V [A2] 4.98V
E Gnd [C] 4.71V
EARPHONE
Pin MUTE
B 0V
C 0V
E Gnd
Earphone Mute
Pin 2nd Driver
B 0.63V
C 0V
E Gnd
EDID Data Q407 PANEL_VCC
Pin HDMI4 Pin Control 2nd Driver
[1] 0V (Gnd) B 0.679V
[2] 0V (Gnd) C 0V
[3] 0V (Gnd) E Gnd
[4] 0V (Gnd)
[5] 4.69V Q409 PANEL_VCC
[6] 4.69V Pin Switch
[7] 4.69V S 11.97V (In)
[8] 4.69V G 1.84V (Enable)
D 11.97V (Out)
Power On/Off
Pin Driver for Q402 Q600 AMP_MUTE
B 0.64V Pin Pin 25 IC600
C 0V B 0.08V
E Gnd C 3.35V
E Gnd
Power On/Off
Pin Switch Q1101-2 EARPHONE
1 3.39V (In) Pin MUTE
2 0.89V (Ctl) B 0V
3 3.28V (Out) C 0V
E Gnd
Inverter On/Off
Pin Switch Q2405 IR Buffer
B 0.06V Pin 1st Driver
C 3.32V B 0.6V
E Gnd C 0V
E Gnd
PANEL_VCC
Pin Q2406 IR Buffer
Control 1st Driver
B 0.03V Pin 2nd Driver
C 0.69V B 0V
E Gnd C 3.3V
E Gnd
Q5004 Tuner SIF
Pin (Sound) Buffer
B 0.163
C Gnd
E 0.85V
Q7701 HDMI 2
Pin Det
B 0.63V
C 0V
E Gnd
Q7703 CEC Remote
Pin HDMI CEC
[B] 3.39V
[G] 3.32V
[S] 0V
[D] 3.26V
D102 Mute
Pin Routing
[A1] 0V
[A2] 0V
[C] 0V
D1115 5V Routing
Pin for IC7705
[A1] 0.03V
[A2] 0V
[C] 4.69V