4
KDC-X579
SWITCH UNIT (X16-2490-10)
Ref. No.
Application / Function
Operation / Condition / Compatibility
IC1
LCD Driver
Drives LCD
IC2
Remote Control IC
Controls the unit
Q2
REMO ON SW
The power supply of IC2 is turned on when base level goes "L"
Q3
Key Illumination SW (Green)
Lights Green key-illumination when base level goes "H"
Q4
Key Illumination SW (Red)
Lights Red key-illumination when base level goes "H"
Q5
Dimmer Control
Lights LCD Back Light when base level goes "H"
ELECTRIC UNIT (X34-3080-10)
Ref. No.
Application / Function
Operation / Condition / Compatibility
IC1
System
µ-COM
Controls FM/AM tuner, the changer, CD mechanism, Panel, volume and tone.
IC2
E.Vol & N.C.MPX
Controls the source, volume, tone and FM multiplex detector.
Bu5V (5V), Audio8V (8V), FM+B (8V), AM+B (8V), P-CON, ANT-CON
IC3
Power Supply IC
IC4
Power IC
Amplifies the front L/R and the rear L/R to 50W maximum.
IC6
Muting logic IC
Controls logic for muting.
IC8
Reset IC
"L" when detection voltage goes below 3.6V or less.
IC9
SW Regulator
Power Supply for MP3
Q1
Serge Detection
"L" when the back-up voltage becomes more than 24V (momentary power down).
"H" when the back-up voltage becomes less than 24V.
Q2
BACK-UP Detection
"L" when B.u is present.
"H" when B.u is absent or momentary power down is detected.
Q3
ACC Detection
"L" when Acc is present.
Q4
SW 5V
ON when the base is "L".
Q21
Servo Regulator
Q22
Servo SW
Q23
Control Power Supply IC
Q31
Dimmer Control
Dimmer ON when the base is "H".
Q32
EXT.AMP Control
Controls Ext.AMP by pulse width.
Q41
SW Regulator Control
DSI lights when the base is "L".
Q151
DSI Driver
DSI turns off when the base is "H".
DSI turns on and off when panel is taken off.
COMPONENTS DESCRIPTION
SW1
OUT
1.5~3.0
Audio ON
3.5~5.0
Audio P-CON ON
7.0~
Audio P-CON, P-ANT ON
SW2
OUT
2.0~3.0
ILL FM ON
4.0~
ILL AM ON