KENWOOD KDCMP522
Service Manual

COMPONENTS DESCRIPTION
q CD PLAYER UNIT (X32-5410-00)
Ref.No.
IC1 IC2 IC4 IC6 IC7 IC8 IC11

KDC-M6024/G/GY/Y KDC-MP522,X569

Component Name
TAR5S33 NJM4580V BA5824FP L88MS33T 703033BYGC-J02 TC74HCT7007AF UPD63760GJ

Application/Functions
3.3V AVR Low pass filter 4CH BTL driver AVR MI-COM Level shifter CD signal processor

Operation/Condition/Compatibility
For audio circuit(3.3V AVR) 2nd low pass filter for audio signals Focusing coil, tracking coil, spindle motor and sled motor driver, disc loading and eject operation. 3.3V AVR Mechanism control microcomputer Level shift for voltage 3.3V to 5.0V Generation of RF signal based on the signals from the APC circuit and pickup,Focusing, tracking, sled and spindle servo processing. Automatic adjustment (focusing, tracking, gain, offset and balance) operations. Digital signal processing (DSP, PLL, sub-codes, CIRC error correction, audio data Interpol ration) operations, and MP3 decoder.

IC13 Q1 Q2 Q3 Q4 Q5 D1

MSM51V4265EP70 DTA143XUA DTC124EUA DTC124EUA MCH6101 DTA143EUA DAN202U

DRAM A.8V SW 3.3V AVR SW A.8V SW APC D.5V SW Protection diode

Data buffer When Q5 gose "ON", Q1 is ON When P ON signal gose "ON" Q2 is ON When P ON signal gose "ON" Q4 is ON LD power control When P ON signal gose "L" Q5 is ON Laser diode protection

q ELECTRIC UNIT (X25-9570-1x/9572-71/9712-70)
Ref.No.
IC1 IC2 IC3

Component Name
UPD703030GC012 TDA7411 BA4911-V4

Application/Functions
System microcomputer Electronic volume & N.C.MPX Power supply IC

Operation/Condition/Compatibility
Control for TUNER unit, CD mechanism, volume & tone, LCD driver and external CD changer unit Control for source selector, volume & tone, and FM multiplex detector. Power supply for the units (Bu5V, Audio8V, FM+B, AM+B, P-con and ANT-con).
SW1 1.5-3.0V 3.5-5.0V 7.0VSW2 2.0-3.0V 4.0VOUT Audio ON Audio, P-con ON Audio, P-con, P-ant ON Illumination, FM ON Illumination, AM ON

IC4 IC6 IC7 IC8 IC9 Q1 Q2 Q3 Q4 Q21 Q22 Q23 Q31 Q32 Q41

TA8273H HD74HC27FP SAA6581T PST3436UL SI-8050JD 2SC4081 2SC4081 2SC4081 2SA1036K 2SD2375 UMC2N UMC2N UN5213 DTA123JK 2SC4081

Audio power amp IC Muting control IC RDS decoder Reset IC Switching regulator Serge detection Backup detection ACC detection SW 5V AVR SW IC control Dimmer control EXT. AMP control SW

Amplifier for audio signal to derive for 4channel speakers (50W maximum for each channel). Control for timing for mute. Decode for RDS signal. When detection voltage goes below 3.5V or less Reset IC output change to "L" signal. Power supply for MP3 CD mecanism unit. When backup voltage become more than 24V output is "L" (momentary power down) / When backup voltage become less than 24V output is "H". When BU voltage supplied output is "L" / When BU voltage not supplied or momentary power down is detected output is "H". When ACC voltage supplied output is "L". When base voltage is "L" Q4 is ON. Servo regulator. Servo SW. Power supply IC controller. When base voltage is "H" dimmer is ON. Control to EXE.AMP for pulse width signal. Switching regulator control SW.

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