3
KDC-W4031/W4031Y/W409/W409Y
KDC-W431GY/W4531/W4531Y/WF431A
COMPONENTS DESCRIPTION
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ELECTRIC UNIT (X34-3402-7x)
Ref. No.
Application / Function
Operation / Condition
IC1
SYSTEM
µ
-COM
System control.
IC3
POWER SUPPLY
DC5Vx2, 7.9Vx1, 8.1Vx1, 10.3V, P.CON, P-ANT output.
IC4
POWER IC
Audio signal amplifier.
IC6
MUTE LOGIC
Mute control.
IC7
RDS DECODER
RDS decode.
IC8
RESET
“L” when detection voltage goes below 3.6V.
IC10
E-VOL & TUNER
E-VOL, Tuner, Stereo decode.
IC11
E2PROM
Saves and writes tuner adjustment data.
IC15
VFD REGULATOR
11.3V output voltage for LED and VFD.
Q51
SERGE DET
“ON” when the base goes “H”.
Q52
BU DET
“ON” when the base goes “H”.
Q53
ACC DET
“ON” when the base goes “H”.
Q71
SERVO+B CONTROL SW
“ON” when the base goes “H”.
Q72,73
SERVO+B AVR
Output voltage level : 7.5V.
Q74
IC3 CONTROL SW
“ON” when the base goes “H” (Output voltage : 10.3V).
Q151
PANEL 5V SW
“ON” when the base goes “L”.
Q155
DSI ILLUMI SW
“ON” when the base goes “L”.
Q252
IC4 STBY SW
“ON” when the base goes “L”.
Q330
Q351, 352 MUTE DRIVER
“ON” when the base goes “L”.
Q351
Lch PRE MUTE SW
Pre-output is muted when the base goes “H”.
Q352
Rch PRE MUTE SW
Pre-output is muted when the base goes “H”.
Q501
AM RF AMP
Adjusts for AM-RF gain.
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CD PLAYER UNIT (X32-5500-00)
Ref. No.
Application / Function
Operation / Condition
Focusing, tracking, sled and spindle servo processing.
IC1
MECHANISM CONTROL
Automatic adjustment (Focusing, tracking, gain, offset and balance) operations.
MICROPROCESSOR
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
IC2
RF AMP/SERVO CD
generation of servo error (Focusing error and tracking error) signals.
SIGNAL PROCESSOR
Detection of dropout, anti-shock, track crossing and off-track conditions, included
gain control function during CD-RW.
IC3
MP3/WMA DECODER
IC4
4ch BTL DRIVER
Focusing coil, tracking coil, spindle motor and sled motor driver, disc loading and
eject operation.
IC5
SW 3.3V AVR
IC6
BU 3.3V AVR
3.3V power supply for back-up.
IC7
BU 2.5V AVR
2.5V power supply for back-up.