Control Unit; Equalizer Unit - Kenwood DPX-MP4070 Service Manual

DPX-MP4070/MP4070B
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CONTROL UNIT

Ref. No.
IC901 LCD DRIVER
IC921 REMOTE
Q903 RED LED SW
Q904 BLUE LED SW
Q905 GREEN LED SW
Q906 SECURITY INDICATOR SW
Q921 REMOTE SW

EQUALIZER UNIT

Ref. No.
IC250 DOLBY/EQUALIZER
CD PLAYER UNIT (X32-5500-01)
Ref. No.
TE
L 13942296513
IC1 MECHANISM CONTROL MICRO PROCESSOR
IC2 RF AMP/SERVO CD SIGNAL PROCESSOR
IC3 MP3/WMA DECODER
IC4 4ch BTL DRIVER
IC5 SW 3.3V AVR
IC6 BU 3.3V AVR
IC7 BU 2.5V AVR
IC8 SELECTOR (SERIAL DATA)
IC9 DAC 3.3V AVR
Q1 LEVEL SHIFT
Q3-7 LEVEL SHIFT
Q8 AUTOMATIC POWER CONTROL
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Q9,10 SWITCH
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4
Application / Function
Application / Function
Application / Function
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y
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8
Operation / Condition
LCD driver
Receives remote signal
Operation / Condition
Cassette audio equalizer
Operation / Condition
Focusing, tracking, sled and spindle servo processing. Automatic
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3 6 7 1 3
adjustment (Focusing, tracking, gain, offset and balance) operations.
Digital signal processing (DSP, PLL, sub-codes, CIRC error correction,
audio data interpolation) operations, and microcomputer function.
Generation of RF signal based on the signals from the APC circuit and
pickup, and generation of servo error (Focusing error and tracking error)
signals.
Detection of dropout, anti-shock, track crossing and off-track conditions,
included gain control function during CD-RW.
Focusing coil, tracking coil, spindle motor and sled motor driver, disc
loading and eject operation.
3.3V power supply for back-up.
2.5V power supply for back-up.
Serial audio data switch.
3.3V power supply for IC2.
3.3V to 5.0V.
3.3V to 5.0V.
LD driver.
Switch for anticipation sub-beam delay.
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2 9 9 4 2 8
1 5 0 5 8 2 9 9 4
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2 8 9 9