
KDC-W808/X689
4
COMPONENTS DESCRIPTION
●ELECTRIC UNIT (X34-3890-11/2-70)
Ref. No. Application / Function Operation / Condition / Compatibility
IC10 Audio8V Ref Power Supply Output 1.27V.
Power Supply forVFD & Mecha digital.
IC60 Switching Regulator Controller CH1 : FDC (4.7V)
CH2 : Mecha digital (5V)
IC80 Switching Regulator Power supply forVFD Driver. (55V)
IC100 Reset IC “L” when detection voltage goes below 3.6V or less.
IC101 System µ-com Controls FM/AM tuner, the changer, CD/MD mechanism, Panel,
volume and tone.
IC103 Muting logic IC Controls logic for muting.
IC104 E2PROM For instraller's memory
IC300 Eelectrical Volume & Source Selector Controls the source, volume, and tone.
IC400 RDS decoder
Panel (MASK) mecha control
IC450 Panel (MASK) mecha motor driver
IC500 Spectrum analyzer Buffer AMP & AGC It is buffer and auto gain control for spectrum analyzer.
IC600 ±9V AVR Power supply for 5V Pre Out OP-AMP.
IC601~603 5V Pre-out AMP Output buffer and gain control.
IC750 Power IC Amplifies the front L/R and the rear L/R to 50W maximum.
Q10,11 Audio8V AVR When Q11’2in goes Hi, A8V AVR outputs 8.0V.
Q12 SW14V When Q12’2pin goes Hi, SW14V outputs 14V.
Q20,21 B.U.5V AVR While BU is applied, BU5V AVR outputs +5V.
Q22,23 SW5V When Q23’base goes Hi, SW5V outputs +5V.
Q31,33 Moter+B, Servo+B AVR (Panel Mecha) When Q33’base goes Hi, Servo+B AVR outputs 8.5V.
Q34,40 Panel5V AVR When Q42’2pin goes Hi, Panel5V AVR outputs 5V.
Q50~52 SW16V (Surge Protection) When Q51’2pin goes Hi, SW16V outputs 13V.
Q60 FDC AVR SW When base goes Hi, VFD AVR off.
Q61 Switching Regulator frequency control SW (IC60)
Q62 Mecha digital AVR SW When base goes Hi, Mecha digital AVR off.
Q63 FDC AVR Switching Power Driver This FET is governed by IC60.
Frequency is decided at Q61.
Q64 Mecha digital AVR Power Driver This FET is governed by IC60.
Frequency is fixed 400kHz.
Q80, 81 AVR SW for IC80 When Q81’base goes Hi, VFD (55V) AVR outputs 55V.
Q91 Panel 5V Discharge SW When Q91’base goes Hi, Panel5V is discharged.
Q100, 101 Panel Detect SW When Q100’base goes Lo, panel is detected.
Q200, 201 Pre-out mute driver When a base gose Lo, mute driver is turned on.
Q202 Acc Detect SW When Q202' base gose Hi, Acc voltage is detected.
Q203, 204 Surge Detect SW When Q204’base goes Hi, IC750 is changed into a standby state.
Q205 B.U Detected SW When Q35’base gose Hi, B.U voltage is detected.
Panel Mecha WAIT OPEN CLOSE STOP
IN1 L L H H
IN2 L H L H
1pin 2pin LH
L400kHz 650kHz
H600kHz 850kHz