Cd Player Unit (X32-5400-00) - Kenwood KDC-225/MR Service Manual

KDC-225/225MR/2025
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3 7 63 1515 0

CD PLAYER UNIT (X32-5400-00)

Ref. No. Application / Function
IC1 RF amplifier adapted for CD-RW
IC2 CD signal processor built-in MI-COM
IC3 4CH BTL driver
IC4 Low pass filter
Q1 APC
Q2 D.5V SW
Q3 Q4 SW
Q4 A.8V SW
Q5 Current driver
Q6 Current driver
D1 Protection diode
D2 Zener diode
TE
D3 Current driver
L 13942296513
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4
COMPONENTS DESCRIPTION
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, 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 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
x ao u163
y
i
2 9
8
Operation / Condition / Compatibility
Q Q
3 6 7 1 3 1 5
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9 4 2 8
0 5 8 2 9 9 4 2 8
m
9 9
9 9