LG LST-4200A Service Manual - Page 47
Whole Block Diagram - 2
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2. WHOLE BLOCK DIAGRAM - 2 RF IN ATSC NIM TUNER IC500 Loop Through NTSC AUDIO Tuner 5V I2C 3V I2C IC106 EEPROM (32Kx8b) NTSC VIDEO Sil 170 5V I2C I2C Hub IC102 DVI 5V I2C I2C IC200, IC201 SDRAM (2Mx32bx2) RS-232C CPU CLK 10 MHz X-tal X100 RS232 Driver (MAX232) IC105 UART Sys Reset (KIA7029 & 74HC14) IC100, IC101 IC110 IC103, IC104 Flash ROM (512Kx16bx2) CPU (S3C44B0X) 60MHz Mute Control Buffer (74LCX157) IC208 IC107, IC108 SDRAM (4Mx16bx2) CPU I/F Front Panel VFD Controller VFD IR Receiver Key Scan Key Block NTSC VIDEO IC301 VIDEO PIXEL DECORDER (VPX3326E) YCbCr ATSC TP IC200 TP Demux Video Decoder Audio Decoder Format Converter VDP (LGDT1102A : HD-II) Digital Audio Out NTSC AUDIO DATA NTSC Audio IC400 AUDIO PROCESSOR (MSP4448G) 2CH L/R Audio Out LPF (MC33078) IC402 5V I2C Digital RGB Hs, Vs IC302 TMDS CH0,1,2 DVI Transmitter TMDS CLK +(Sil170) 3V I2C Line Driver (74HC540) IC202 FL300~302 LPF (TOKO 25M) X 3 IC303 AMP (LMH6683) Hs/Vs RGB VCR out (Comp.) VCR out (Y/C) IC304 AMP (LMH6683) Digital Audio Coaxial Out Digital Audio Optical Out I2C Ext. (82B715) IC300 Variable Audio Out X2 DVI Out RGB RGB Video Out YPbPr Video Out VCR Out AC220V SMPS Power Control +30V +12V +9V +5V +5V_Alive +3.3V -28V -24V -21.5V +5V_Alive +3.3V +3.3V_Alive 3.3V Regulator IC501 1.8V Regulator IC502 2.5V Regulator IC503 +1.8V +2.5V_Alive Main PWM Main VDP Clock NT2CLK SYSCLK IC204 VCXO IC (CY24212) Clock Gen. (CY24206) IC206 27 MHz X-tal X200 S-Video Out 3-39 3-40