KENWOOD KDC519
Service Manual

KDC-5019/519/7021/7021Y/8020/B7021
MICROCOMPUTER'S TERMINAL DESCRIPTION
Pin No. 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66-69 70 71 72 73 74 75 76 77 78 79 80 81 82 Pin Name CH-RST CH-MUTE CH-CON ILL-ON M-MUTE L M-MUTE R BVDD BVSS M-RST M-STOP N.C. LO/EJ MOSW N.C. CD-SW3 DA-SDA/NC LCE N.C. AV CONT AVDD AVSS AVREF PHONE SRM-SW3 SRM-SW1 SRM-SW2 SRM-DET NOISE S-METER R-DATA R-QUAL I/O O I O O I I O O O I/O O O I O O O O I I I Description Reset output to changers Mute request from changers Changer control Illumination AVR on/off control output Mute request (L Ch.) from CD MECHA. MI-COM. Mute request (R Ch.) from CD MECHA. MI-COM. Positive power supply connection terminal Ground connection terminal Reset output to CD mechanism MI-COM. Stop request to CD mechanism MI-COM. CD mechanism loading/Eject switching output CD mechanism loading motor control output Down & limit switch detection input Clock output to D/A converter (V-LED model) CE output to LCD driver IC Processing Operation : Reset Hi: Mute request Lo: Standby mode, Hi: Operation mode Hi: POWER ON mode except panel detached Lo: Mute request Lo: Mute request Connected to BU 5V lines. Connected to GND lines. Lo: Reset Lo: Stop mode, Hi: Operation mode Not used(N.C.) Lo: Loading, Hi: Eject, Hi-Z: Stop or Break Hi: CD loading/eject action or Break, Lo: other Not used(N.C.) Hi: Chucking, Lo: Pickup most inner position Lo: Panel detached, momentary power down detected

83 IFC-OUT 84,85 N.C. 86 SRM-B

87 88 89 90 91 92 93 94 95 96 97 98 99 100 6

R-CLK CH-REQC KEY-REQ CD-SW1 CD-SW2 SRM+B BU-DET CH-DATAC CH-DATAH CH-CLK L-DATA L L-DATA S L-CLK PAN5V

Not used(N.C.) A/D converter reference voltage control output Hi: Active, Connected to AVREF terminal A/D converter positive power supply connection terminal Connected to BU 5V lines. A/D converter ground connection terminal Connected to GND lines. A/D converter reference voltage input terminal PHONE detection input 1V or less: TEL MUTE, 2.5V or greater: NAVI MUTE Mask mechanism position SW3 input Panel: (SW1,SW2,SW3)=(Lo,Lo,Hi) Angle: (SW1,SW2,SW3)=(Hi,Hi,Lo) I Mask mechanism position SW1 input Eject: (SW1,SW2,SW3)=(Hi,Hi,Hi) I Mask mechanism position SW2 input Mask : (SW1,SW2,SW3)=(Lo,Lo,Lo) I Mask mechanism detection input Lo: Mechanism detected, Hi: mechanism not detected I FM noise detection input I S-meter input from F/E Except RDS, RBDS model: Not used(pull down to I Data input from the RDS decoder IC GND lines) Except RDS, RBDS model: Not used(pull down to I Quality input from the RDS decoder IC GND lines) I F/E IFC OUT input terminal Lo: Station detected, Hi: Not detected I Not used(pull down to GND lines) Standby: (SRM+B,SRM-B)=(Lo,Lo) Clock wise: (SRM+B,SRM-B)=(Hi,Lo) O SRM mechanism submotor control output Counter clock wise: (SRM+B,SRM-B)=(Lo,Hi) Break: (SRM+B,SRM-B)=(Hi,Hi) Except RDS, RBDS model: Not used(pull down to I Clock input from the RDS decoder IC GND lines) I Request input from changers Lo: Request I Communication request from LCD driver IC I Loading SW detection input Lo: Loading start I 12cm disc detection SW input Lo: 12cm disc detected O SRM mechanism submotor control output Hi : When momentary power down detected or BU OFF I Momentary power down detection input Lo : BU ON I Data input from changers O Data output to changers I/O Clock input/output with changers I Data input from the LCD driver IC O Data output to the LCD driver IC Clock output to the LCD driver IC I/O /Panel detaching detection input(LCD Driver) Lo: Panel attached O Panel 5V control Hi: Panel attached, Lo: Panel detached