Sharp LC-20AV7U Service Manual - Page 51

IC PIN FUNCTION DESCRIPTIONS IC31 (IF Signal Process) Pin No. Signal Name Function 1 V-OUT Video Signal Output 2 DEFECT-SW Defect Switching 3 VCC VCC 4 DET-OUT Video Detect Output 5 APC APC Filter 6 VCO-F/B Vco Feed Back 7 SIF-IN SIF Input Signal 8 SIF-OUT SIF Output Signal 9 NU Not Used 10 NU Not Used 11 REF-SIGNAL Reference Signal Input 12 VCC VCC 13 AFT AFT Output 14 NU Not Used 15 GND GND 16 VIF-IN1 VIF Input 1 Signal 17 VIF-IN2 VIF Input 2 Signal 18 IF-AGC1 IF Auto Gain Control 1 19 IF-AGC2 IF Auto Gain Control 2 20 EQ-AMP-F/B Equalizer Amp Feed Back IC61, IC1205 (Memory) Pin No. Signal Name Function 1 A0 Slave Address 0 Input 2 A1 Slave Address 1 Input 3 A2 Slave Address 2 Input 4 GND GND 5 SDA Serial Data 6 SCL Serial Clock 7 WP Write Protect 8 VCC VCC IC1202 (LCD Drive / LCD Signal Process / TV Micro Controller) Pin No. Signal Name Function 1 VDD+3.3V +3.3V VDD 2 VDD+3.3V +3.3V VDD 3 KEY-IN-1 Key Input 1 Pin No. Signal Name Function 4 KEY-IN-2 Key Input 2 5 AFT-IN AFT Voltage Input 6 PROTECT-1 Power Supply Protection 1 7 PROTECT-2 Power Supply Protection 2 8 PROTECT-4 Power Supply Protection 4 9 ADIN6 Reference Terminal 10 VSS GND 11 NU Not Used 12 NU Not Used 13 NU Not Used 14 NU Not Used 15 DTV-S-SOUT DTV Serial Data Out 16 DTV-S-SIN DTV Serial Data In 17 DTV-S-SREQ DTV Serial Request 18 IF-MUTE IF Mute Signal Output 19 VCOM VCOM 20 BACKLIGHTADJ Inverter Control Signal Output 21 VDD+3.3V +3.3V VDD 22 DTV-ON-H2 DTV On Signal 2 at High 23 VOLUME Volume Control Signal Output 24 VDD+1.2V +1.2V VDD 25 VDD+1.2V +1.2V VDD 26 VGH-H VGH Signal at High 27 REMOTE Remote Control Signal Input 28 P-ON-H Power On Signal at High 29 BUS-OPEN Chip select 30 SCL Serial Clock 31 SDA Serial Data 32 NU Not Used 33 NU Not Used 34 NU Not Used 35 NU Not Used 36 NU Not Used 37 XIN Crystal Oscillation Input (27MHz) 38 XOUT Crystal Oscillation Output (27MHz) 39 VSS GND 40 VSS GND 41 VSS GND 42 VDD+3.3V +3.3V VDD 12-1 A7144PIN