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KDC-3025/325/5026/G
SWITCH UNIT (X16-2500-xx)
Ref. No.
Application/Function
IC1
LCD Driver
IC2
Remote Control IC
Q1,Q4
REMO ON SW
ELECTRIC UNIT (X34-3090-xx)
Ref. No.
Application/Function
System µ-COM
IC1
IC2
E.Vol & N.C.MPX
IC3
Power Supply IC
IC4
Power IC
IC6
Muting logic IC
IC8
Reset IC
Q1
Surge Detection
Q2
BACK-UP Detection
Q3
ACC Detection
Q4
SW 5V
Q21
Servo Regurator
Q22
Servo SW
Q23
Conrtol Power Supply IC
Q151
DSI Driver
Q152
Panel 5V SW
Q153,Q154
ILLUMI Control
Q201
Noise buffer
Q351
Pre Mute SW
Q352
Pre Mute SW
Q354
Pre Mute SW
Q355
Pre Mute SW
Q356
Pre Mute SW
4
COMPONENTS DESCRIPTION
Drives LCD
Controls the unit.
The power supply of IC2 is turned on when base level goes "L".
Controls FM/AM tuner, the changer, CD mechanism, Panel, volume, and tone.
Controls the source, volume, tone and FM multiplex detector.
Bu5V (5V) Audio8V (8V) FM+B (8V)
AM+B (8V) P-CON ANT-CON
SW1
1.5~3.0
Audio ON
3.5~5.0
Audio P-CON ON
7.0~
Audio P-CON P-ANT ON
SW2
2.0~3.0
ILLUMI FM ON
4.0~
ILLUMI AM ON
Amplifies the front L/R and the rear L/R to 50W maximum.
Controls logic for muting.
"L" when detection voltage goes below 3.5V or less.
"L" when the back-up voltage becomes more than 24V (momentary power down).
"H" when the back-up voltage becomes less than 24V.
"L" when B.u is present. "H" when B.u is absent or momentary power down is detected.
"L" when Acc is present.
ON when the base is "L".
DSI lights when the base is "L".
DSI turns off when the base is "H".
DSI turns on and off when panel is taken off.
When the panel is attached, the base goes "L", turning the Tr ON to supply 5V to the panel.
When panel is taken off, panel 5Vcut off.
ILLUMI lights when the base of Q153 is "H".
Mutes the Rear Lch when the base is "H".
Mutes the Rear Rch when the base is "H".
Drives the Pre Mute sw (Q351, 352, 355, 356) when the base is "L".
Mutes the Front Lch when the base is "H".
Mutes the Front Rch when the base is "H".
Operation/Condition/Compatibility
Operation/Condition/Compatibility
OUT
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