6
KMD-44
COMPONENTS DESCRIPTION
Ref. No.
Application/Function
Operation/Condition/Compatibility
RF amplifier (Pit-groove switching, AGC, EQ Gain switching, I-V Amp,
IC1
RF Matrix Amplifier for MD
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
IC2
Digital signal processor for MD
ADIP decoder, Memory control, Digital servo, (focus, tracking thread, spindle
CLV), 1 bit D/A, ATRAC/ATRAC3 decoding, 4M(1Mx4) DRAM Analog post filter
IC3
+2.5V regulator
Power supply for 2.5V system of IC2
IC4
5chBTL servo driver
Various actuator, Motor drive, Disk loading, Eject motor driver, +3.3V regulatore
IC5
low-pass filter
3-times active filter
IC6
3.3v regulator
D/A audio+B
IC7
CMOS buffer
3.3V
/
5.0V level shift
IC8
Mechanism micon
Servo control, Memory, control, System control, Various interfaces
IC9
E2PROM
Servo coefficient, Servo adjustment data backup memory
Q1
APC
IC1, IC2 APC ON and ON while Q2 is OFF
Q2
LD SW
ON when laser is OFF (when micro com LDON "L")
Q3
Detection of disk reflection amount
ON when focus is passed during UP search
Q4
+3.3V regular
ON when SW+5V "H" (when Q7 is ON)
Q5
A+8V SW
ON when Q6 is ON
Q6
SW for SW+8V
ON when SW+5V "H" (When Q7 is ON)
Q7
PON (SW+5V)
ON when Pin 11 of IC8 is "L"
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MD Unit (X33-3120-00)
