KENWOOD KDC4021Y
Manual de Servicio

KDC-3020R/ 4021/V/Y/YV

MICROCOMPUTER�S TERMINAL DESCRIPTION / ADJUSTMENT
Pin No. 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 Pin Name LOE/LIM SW MOSW LO/EJ M-STOP M-RST M-MUTE RESET REMO R-CLK CH-REQC LOS SW KEY-REQ 12EJE SW Vss0 VDD1 X2 X1 IC XT2 XT1 VDD0 AVREF0 S-METER PHONE NOISE NC AVCONT I/O I O I/O O O I I I I I I I I I I I I I O O Purpose CD mechanism Down & Limit detection CD mechanism motor switching Lo/Ej switching Mechanism COM stop output Mechanism COM reset output Mechanism COM mute input System reset input Remote control input RDS CLOCK 5-wire CH request (CH) Loading SW detection Key input detection 12 cm disc detection GND potential (for ports) Positive power supply (for other parts than ports and analog circuitry) Main system clock oscillation Main system clock oscillation Flash uCOM write Not used Not used (Connected to 5V power supply) Positive power supply (for ports) 5V power supply (A/D converter reference voltage) S-meter input Hi-Z L Hi-Z L H Hi-Z Hi-Z Hi-Z Hi-Z, L when RDS is not available. Hi-Z, L when CH is not available. Hi-Z Hi-Z Hi-Z Hi-Z Processing in STBY Mode

Navigation muting 2.5V or more, Telephone muting 1V or less. Hi-Z, L when TEL is not available. FM noise detection Not used A/D reference voltage control Hi-Z, L when RDS is not available. L L

ADJUSTMENT
No. ITEM INPUT SETTINGS TUNER (RECEIVER) SETTINGS ALIGNMENT POINTS ALIGN FOR

FM SECTION 98.1MHz 1 SD 0 dev 35dBµ (ANT input) AM SECTION 990kHz (1) SD 0% mod 35dBµ (ANT input) TEST MODE : ON TEST MODE : OFF TEST MODE : ON AM 990kHz While holding preset �1� key, press and Preset �1� key, and preset �6� key hold preset �6� key for a few seconds. �ADJ OK� is good. �ADJ NG� is not good. TEST MODE : ON FM 98.1MHz While holding preset �1� key, press and Preset �1� key, and preset �6� key hold preset �6� key for a few seconds. �ADJ OK� is good. �ADJ NG� is not good.

While holding the FM key and preset �6� key, reset the unit. Reset the unit.

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