KDC-2022/V/202MR/4023
3
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SWITCH UNIT (X16-1460-1x/2370-10)
COMPONENTS DESCRIPTION
Ref.No.
Application/Functions
Operation/Condition/Compatibility
IC1
LCD driver & key matrix
IC2
Remote Sencer
Q1
Key scan start
When Q1 base goes Lo, key scan start.
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DAUGHTER UNIT (X89-2590-10)
Ref.No.
Application/Functions
Operation/Condition/Compatibility
Q221, 222 Audio mute SW
Audio preout is muted when the bose goes "H".
Q225
Audio mute driver
Mute driver for audio mute SW.
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ELECTRIC UNIT (X25-9600-xx)
Ref.No.
Application/Functions
Operation/Condition/Compatibility
IC1
System control µ-com
System µ-com
IC4
Power amplifire
E-Vol output encoder power amplification for speaker.
IC7
Power supply (Multi AVR)
-
When a pin 1, 2, or 13 is "H", MUTE turns on
IC8
MUTE Logic
When a pin 3, 4, or 5 is "H", P-AMP mute turns ON.
Changer is RESET when a pin 9, 10, or 11 is "L".
IC10
Tuner & E-Vol.
FM/AM tuner & stereo decoder & E-Vol.
IC11
Power on reset
When B.U. 5V voltage is less than 3.5V, power reset.
IC12
E2P-ROM
Writing and read-out of adjustment data for a tuner
Q10
B.U. detector
BU on (base "H") : Collector "H"
Q20
A.C.C detector
ACC ON (bace : "H") : Collector "L"
Q40
MUTE driver
Base "L" : Mute on (collector "L")
Q50
SW 5V
Base "L" : SW5V on
Q51
SERBO AVR control
Pin 2 "H" : Serbo on (pin 4 "H")
Q55
SERBO AVR
Base "H" : Serbo on
Q70
Surge detector
Base "H" : Surge detect
Q101
DSI driver
Base "H" : DSI on
Q102
PANEL 5V SW
Panel attch : PAN5V on
Q223,224 MUTE
Base "H" : Mute on
Q501
AM RF amplifire
Base "H" : Gain UP
Q502
FM RF amplifire
Gate "H" : Gain UP
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