KENWOOD KMD673R
Manual de Servicio

KMD-673R
COMPONENTS DESCRIPTION
GMD Unit (X33-3120-00)
Ref. No. IC1 Application/Function RF Matrix Amplifier for MD Operation/Condition/Compatibility RF amplifier (Pit-groove switching, AGC, EQ Gain switching, I-V Amp, light amount signal output, Peak-hold output, Bottom-hold output, FE output, TE output, SE output, ADIP dual-value output, Vref output, APC PD amplifier, FZC generation comparator EFM decoding, EFM digital PLL, ACIRC decoding, Automatic LINK processing ADIP decoder, Memory control, Digital servo, (focus, tracking thread, spindle CLV), 1 bit D/A, ATRAC/ATRAC3 decoding, 4M(1Mx4) DRAM Analog post filter Power supply for 2.5V system of IC2 Various actuator, Motor drive, Disk loading, Eject motor driver, +3.3V regulatore 3-times active filter D/A audio+B 3.3V/5.0V level shift Servo control, Memory, control, System control, Various interfaces Servo coefficient, Servo adjustment data backup memory IC1, IC2 APC ON and ON while Q2 is OFF ON when laser is OFF (when micro com LDON "L") ON when focus is passed during UP search ON when SW+5V "H" (when Q7 is ON) ON when Q6 is ON ON when SW+5V "H" (When Q7 is ON) ON when Pin 11 of IC8 is "L"

IC2 IC3 IC4 IC5 IC6 IC7 IC8 IC9 Q1 Q2 Q3 Q4 Q5 Q6 Q7

Digital signal processor for MD +2.5V regulator 5chBTL servo driver low-pass filter 3.3v regulator CMOS buffer Mechanism micon E2PROM APC LD SW Detection of disk reflection amount +3.3V regular A+8V SW SW for SW+8V PON (SW+5V)

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