Kenwood KRC-578R Service Manual

Also see for KRC-578R: Instruction manual

Contents

KRC-578R/RY,680R4MICROCOMPUTER'S TERMINAL DESCRIPTIONPin Pin Name Signal Name I/O Purpose Operation Description51 AVdd - A/D analog power pin52 AVref0 - A/D reference voltage input pin53 P10/ANI0 PHONE I PHONE detection input <1 V: PHONE. >2.5 V: Navigation muting.54 P11/ANI1 NC I Not used55 P12/ANI2 NOISE I FM noise detection input56 P13/ANI3 S-METER I FM S-meter input57 P14/ANI4 NC I Not used58 P15/ANI5 NC I Not used59 P16/ANI6 REEL_S I C-mechanism supply reel detection60 P17/ANI7 REEL_T I C-mechanism take-up reel detection61 AVss - A/D and D/A GND pin62 P130/ANO0 NC O Not used63 P131/ANO1 NC O Not used64 AVref1 - D/A reference voltage input pin65 P70/RxD2/SI2 CH_DATAC I Data input from CD-CH66 P71/TxD2/SO2 CH-DATAH O Data output to CD-CH67 P72/ASCK2/SCK2 CH_CLK I/O CD-CH clock input/output68 P20/RxD1/SI1 LCD_DATAL I Data input to LCD driver69 P21/TxD1/SO1 LCD_DATAS O Data output from LCD driver70 P22/ASCK1/SCK1 LCD_CLK O Clock output to LCD driver71 P23/PCL NC O Not used72 P24/BUZ BEEP O Beep output73 P25/SI0 NC O Not used74 P26/SO0 PNL_DET1 I Panel detection75 P27/SCK0 NC O Not used76 P80/A0 LCD_INH O Reset output to LCD driver77 P81/A1 LCD_CE O CE output to LCD driver78 P82/A2 SRT_SW1 I SRT position detection input79 P83/A3 SRT_SW2 I SRT position detection input80 P84/A4 NC O Not used81 P85/A5 NC O Not used82 P86/A6 NC O Not used83 P87/A7 C-MSC O EQ amp FF/PLAY control PLAY:HI OFF:LO84 P40/AD0 C-F/R O Tape transport direction switching FWD:LO REV:HI85 P41/AD1 C-MUTE O Tape muting control MUTE:HI86 P42/AD2 C-MS_IN I Inter-music pulse detection87 P43/AD3 C-MTL O MTL ON/OFF control ON:HI OFF:LO88 P44/AD4 C-NR O Dolby ON/OFF control ON:HI OFF:LO89 P45/AD5 NC O Not used90 P46/AD6 NC O Not used91 P47/AD7 RDS_DATA I Data input from RDS decoder92 P50/A8 RDS_QUAL I Quality input from RDS decoder93 P51/A9 AFC O PLL high-speed lock-up pin During reception: Hi.During search: Lo.94 P52/A10 FM/AM_SD I FM/AM SD input Station detected: Hi.95 P53/A11 IF_COUNT I Not used96 P54/A12 NC O Not used97 P55/A13 AM+B O AM power control ON:HI98 P56/A14 FM+B O FM power control ON:HI99 P57/A15 NC O Not used100 Vss - GND pin784217AGF503(504)(IC1 : MAIN UNIT)