KENWOOD KDC205
Manual de Servicio

KDC-205/CR, 226 KDC-2026, 3026/R

COMPONENTS DESCRIPTION
� SWITCH UNIT (X16-2460-21/2470-xx)
Ref No. IC1 IC2 Q1 Q2 Q3 Application/Functions LCD driver Sensor Key scan detect LED SW LED SW Operation/Condition/Compatibility LCD derive & Key input interface Remote control sensor key scan start at base gose �L�. When Q2 base gose �H� LED is light on RED Color When Q2 base gose �H� LED is light on GREEN Color

� CD PLAYER UNIT (X32-5490-00)
Ref No. IC1 IC2 IC3 IC4 Q2 Q3 Q4 Application/Functions Mechanism control SW3.3V AVR CD DSP & servo IC BTL driver SW APC SW Operation/Condition/Compatibility When BU5V & MSTOP (12pin) goes �H� (IC1 is active) When CNTL (1pin) goes �H� (SW3.3V AVR : ON) CD RF amp, Servo, DSP & DAC Focus, tracking coil, Sled & Spindle motor driver IC SW5V SW transistor Auto Power Control EQ SW transistor

� ELECTRIC UNIT (X34-3100-21/3110-xx)
Ref No. IC1 IC4 IC6 IC7 IC8 IC10 IC11 IC12 Q10 Q20 Q40 Q50 Q51 Q53 Q55 Q70 Q101 Q102 Q201 Q223,224 Q251 Q252 Q253 Q501 Q502 Q503 Application/Functions System control IC Audio power IC RDS decoder Power supply IC Muting logic IC E-VOL & tuner IC Reset IC E2PROM BU detector ACC detector Muting driver foe Q223, 224 SW5V SW Control SW for SERVO +B SERVO +B AVR Serge detector DSI illumination SW Panel 5V SW Noise buffer Preout muting SW SW Smeter RC & MPTHTC SW Smeter RC & MPTHTC SW AM RF amplifier FM RF amplifier MPX buffer Operation/Condition/Compatibility System control microprocessor Audio power amplifier RDS decoder IC Multi AVR IC (for 5V, 8V, P-CON & P-ANT) Control for MUTE, P-ANT & RESET muting E-VOL. FM/AM tuner & stereo decoder When BU5V line voltage is less than 3.5V, this IC output line is �L� Memorized tuner adjustment data (save & load) When the base goes �H� during BU applied (ON) When the base goes �H� during ACC applied (ON) When the base goes �L� (Muting : ON) When the base goes �L� (SW5V : ON) Control SW for IC7 When the base goes �H� (Servo +B : ON) Servo AVR (7.4V) When the base goes �H� (Serge detection) When the base goes �L� (DSI illumination : ON) When the base goes �L� (Panel 5V : ON) Tuner audio noise buffer amplifier When the base goes �H� (Preout muting : ON) When the base goes �L� (IC4 : ON) RC & TC is �LONG� when the base is �H� (base is �L� is AF search) When collector is �H�, emitter is �H� When the base goes �H� (RF circuit gain is up) When the base goes �H� (RF circuit gain is up) MPX input buffer with RDS

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