4
KDC-205/CR, 226
KDC-2026, 3026/R
COMPONENTS DESCRIPTION
● SWITCH UNIT (X16-2460-21/2470-xx)
Ref No. Application/Functions Operation/Condition/Compatibility
IC1 LCD driver LCD derive & Key input interface
IC2 Sensor Remote control sensor
Q1 Key scan detect key scan start at base gose “L”.
Q2 LED SW When Q2 base gose “H” LED is light on RED Color
Q3 LED SW When Q2 base gose “H” LED is light on GREEN Color
● CD PLAYER UNIT (X32-5490-00)
Ref No. Application/Functions Operation/Condition/Compatibility
IC1 Mechanism control When BU5V & MSTOP (12pin) goes “H” (IC1 is active)
IC2 SW3.3V AVR When CNTL (1pin) goes “H” (SW3.3V AVR : ON)
IC3 CD DSP & servo IC CD RF amp, Servo, DSP & DAC
IC4 BTL driver Focus, tracking coil, Sled & Spindle motor driver IC
Q2 SW SW5V SW transistor
Q3 APC Auto Power Control
Q4 SW EQ SW transistor
● ELECTRIC UNIT (X34-3100-21/3110-xx)
Ref No. Application/Functions Operation/Condition/Compatibility
IC1 System control IC System control microprocessor
IC4 Audio power IC Audio power amplifier
IC6 RDS decoder RDS decoder IC
IC7 Power supply IC Multi AVR IC (for 5V, 8V, P-CON & P-ANT)
IC8 Muting logic IC Control for MUTE, P-ANT & RESET muting
IC10 E-VOL & tuner IC E-VOL. FM/AM tuner & stereo decoder
IC11 Reset IC When BU5V line voltage is less than 3.5V, this IC output line is “L”
IC12 E2PROM Memorized tuner adjustment data (save & load)
Q10 BU detector When the base goes “H” during BU applied (ON)
Q20 ACC detector When the base goes “H” during ACC applied (ON)
Q40 Muting driver foe Q223, 224 When the base goes “L” (Muting : ON)
Q50 SW5V When the base goes “L” (SW5V : ON)
Q51 SW Control SW for IC7
Q53 Control SW for SERVO +B When the base goes “H” (Servo +B : ON)
Q55 SERVO +B AVR Servo AVR (7.4V)
Q70 Serge detector When the base goes “H” (Serge detection)
Q101 DSI illumination SW When the base goes “L” (DSI illumination : ON)
Q102 Panel 5V SW When the base goes “L” (Panel 5V : ON)
Q201 Noise buffer Tuner audio noise buffer amplifier
Q223,224 Preout muting SW When the base goes “H” (Preout muting : ON)
Q251 SW When the base goes “L” (IC4 : ON)
Q252 Smeter RC & MPTHTC SW RC & TC is “LONG” when the base is “H” (base is “L” is AF search)
Q253 Smeter RC & MPTHTC SW When collector is “H”, emitter is “H”
Q501 AM RF amplifier When the base goes “H” (RF circuit gain is up)
Q502 FM RF amplifier When the base goes “H” (RF circuit gain is up)
Q503 MPX buffer MPX input buffer with RDS
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TEL 13942296513 QQ 376315150 892498299
TEL 13942296513 QQ 376315150 892498299
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