42LH50 MAIN (FRONT SIDE) SIMICONDUCTORS
IC102 BCM Reset IC2400 1.2V Core IC2404 3.3V-ST IC2500 9V Reg IC501 HDMI Remote Q2406 5V and
Pin Pin Pin 3.3V-VDDP-ST Pin for Tuner Pin Pin LVDS 12V Switch
1 3.3V [1] Gnd 1 Gnd [1] 12.3V [1] 3.3V [1] 5V
2 Gnd [2] 5V 2 3.3V [2] 8.9V [2] 3.3V [2] 0.2V
3 3.29V [3] Gnd 3 5V [3] Gnd [3] n/c [3] 12.3V
[4] 0.8V [4] n/c [4] 6V
IC2101 RGB [5] 0.9V IC2502 5V Reg [5] n/c [5] 12.3V
Pin Sync [6] 3.23V IC2405 1.8V-DDR Pin for Tuner [6] 3.19V [6] 12.3V
[1] 1.9V [7] [8] 1.2V Pin Reg [1] 8.98V [7] 5V
[2] 1.9V [1] 0.58V [2] 1.9V Q2401 24V PWR Sw [8] 5V
[3] 4.38V IC2401 5V USB [2] 1.8V [3] 5V Pin Q2405
[4] 1.9V Pin Fan [3] 3.3V [4] 0V B 0.59V Q2407 POW On/Off2
[5] 1.9V [1] 0V [5] 0V C 0V Pin
[6] 4.5V [2] 12V E 0V B 3.37V
[7] Gnd [3] Gnd IC2406 1.26V-MEMC IC3200 Micro Reset C 4.7V
[8] n/c [4] 0.8V Pin Reg Pin Q2402 5V Sw Ctl E 5V
[9] 1.9V [5] 0.8V [1] n/c [1] 3.3V Pin Q2406
[10] 1.9V [6] 5V [2] 1.87V [2] Gnd B 0.59V Q2408 INV Ctl
[11] 4.38V [7] 5V [3] 1.87V [3] 0.6V C 0V Pin
[12] 1.9V [8] 5V [4] n/c E 0V B 0V
[13] 1.9V [5] n/c C 4.55V
[14] 5V IC2402 1.8V-MEMC [6] 1.27V IC3201 uP EEPROM Q2404 LVDS Sw Ctl E 0V
Pin [7] 0.8V Pin Pin Q2406
IC2300 1.8V Amp [1] Gnd [8] Gnd [1] Gnd B 0.59V Q3204 Micro
Pin Audio [2] 5V [2] Gnd C 0V Pin Reset Sw.
1 Gnd [3] Gnd IC2407 A2.5V Reg [3] 3.29V E 0V B 0.59V
2 1.8V [4] 0.8V Pin [4] Gnd C 0V
3 3.3V [5] 1V [1] n/c [5] 3.3V Q2405
24V PWR E0V
[6] 4.98V [2] 3.23V [6] 3.3V Pin
12V PWR
IC2103 RS232 [7] 1.89V [3] 3.3V [7] 0V [1] 21.28V
Pin Rx/Tx [8] 1.89V [4] n/c [8] 3.3V [2] 12.31V
[1] 3.25V [5] n/c [3] 12.31V
[2] 3.27V IC2403 3.3V/A3.3V [6] 2.53V IC3211 Power Det [4] 6V
[3] n/c Pin Reg [7] 0.53V Pin [5] 12.31V
[4] n/c [1] Gnd [8] Gnd [1] Gnd [6] 12.31V
[5] n/c [2] 12V [2] 3.3V [7] 21.28V
[6] Gnd [3] Gnd IC2408 1.8V-DDR [3] 3.36V [8] 21.28V
[7] n/c [4] 0.8V Pin Reg
[8] Gnd [5] 0.9V [1] Gnd IC3400 USB 5V
[9] Gnd [6] 3.23V [2] 3.3V Pin
[10] 4.76V [7] 3.37V [3] 0.89V [1] 5V
[11] 4.76V [8] 3.37V [4] 0.9V [2] 0V
[12] 3.17V [5] 1.8V [3] 3.3V
[13] 3.3V [6] 3.3V [4] 3.3V
[14] 3.3V [7] 1.8V [5] 0V
[15] 3.3V [8] 0.89V [6] 5V
[16] 5V
D500 IC501 shunt LD2400 A3.3V OK ZD3400 IR Clamp ZD3401 Key2 Clamp ZD3402 Key1 Clamp
Pin Pin Pin Pin Pin
A1 0V A1 n/c C 2.68V C 3.3V A Gnd
C 3.1V C Gnd A Gnd A Gnd C 3.3V
A2 3.29V A2 1.62V
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