Components Description - Kenwood KDC-4022 Service Manual

CD PLAYER UNIT (X32-5400-00)
Ref.No. Component Name
IC1 AN22002AA
IC2 MN6627771KP
IC3 BA5824FP
IC4 NJM4580M1
Q1 MCH6101
Q2 2SA1362(Y)
Q3 DTC124EUA
Q4 DTA143XUA
Q5 2SC4081
Q6 2SA1576A
D1 DAN202U
D2 MA8051-L
D3 DA204U
ELECTRIC UNIT (X25-9800-11/12/21)
Ref.No. Component Name
IC1 UPD703030GC013
IC2 TDA7411
IC3 BA4911-V4
IC4 TA8273H
IC6 HD74HC27FP
IC8 PST3436UL
Q1 2SC4081
Q2 2SC4081
Q3 2SC4081
Q4 2SA1036K
Q21 2SD2375
Q22 UMC2N
Q23 UMC2N
Q31 UN5213

COMPONENTS DESCRIPTION

Application/Functions
RF amplifier adapted for CD-RW
CD signal processor built-in MI-COM Focusing, tracking, sled and spindle servo processing. Automatic
4CH BTL driver
Low pass filter
APC
D.5V SW
Q4 SW
A.8V SW
Current driver
Current driver
Protection diode
Zener diode
Current driver
Application/Functions
System microcomputer
Electronic volume & N.C.MPX
Power supply IC
Audio power amp IC
Muting control IC
Reset IC
Serge detection
Backup detection
ACC detection
SW 5V
AVR
SW
IC control
Dimmer control
KDC-4022/422/6023
Operation/Condition/Compatibility
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.
adjustment (focusing, tracking, gain, offset and balance) operations.
Digital signal processing (DSP, PLL, sub-codes, CIRC error correction,
audio data Interpol ration) operations, and Microcomputer function.
Focusing coil, tracking coil, spindle motor and sled motor driver, disc
loading and eject operation.
2nd low pass filter for audio signals.
LD power control.
When P ON signal gose"L", Q2 is ON.
When P ON signal gose"L" (SW+5V AVR is ON), Q3 is ON.
When P ON signal gose"L" (Q3 is ON), Q4 is ON.
Current driver.
Current driver.
Laser diode protection.
DAC AVR/LPF reference voltage (A.5V).
Current driver.
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 OUT
1.5-3.0V Audio ON
3.5-5.0V Audio, P-con ON
7.0V- Audio, P-con, P-ant ON
SW2
2.0-3.0V Illumination, FM ON
4.0V- Illumination, AM ON
Amplifier for audio signal to derive for 4channel speakers (50W maximum
for each channel).
Control for timing for mute.
When detection voltage goes below 3.5V or less Reset IC output change
to "L" signal.
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.
3