Components Description - Kenwood KDC-M4524 Service Manual

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SWITCH UNIT (X16-2052-71/2362-70)
Ref. No.
IC1 LCD Driver
IC2 Remote-control IC
Q1 Key-scan Start SW
Q2 Key-illuminations SW (GREEN)
Q3 Key-illuminations SW (RED)
ELECTRIC UNIT (X25-9622-71/9812-70)
Ref. No.
IC1 System MI-COM
IC2 E-VOL. & N.C. MPX
IC3 Power Supply IC
IC4 Power IC
IC6 Analog SW (Mute logic)
IC7 RDS Demodulator
IC8 Reset IC
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L 13942296513
IC9 CD mechanism 5V AVR
Q1 SERGE Det.
Q2 B.U. Det.
Q3 ACC Det.
Q4 SW 5V
Q21 SERVO +B AVR
Q22 SW 14V
Q41 MECHA 5V AVR SW
Q101 Buffer
Q151 Panel 5V SW
Q201 Noise buffer
Q350 Mute driver for Audio mute SW
Q351 Pre mute SW
Q352 Pre mute SW
Q401 DSI ILLUMI SW
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COMPONENTS DESCRIPTION

Function
"ON" when the base goes "L".
ON (Key-illuminations Green) when the base goes "H".
ON (Key-illuminations RED) when the base goes "H".
Function
"L" : detection voltage below 3.6V
ON when the base goes "Hi".
ON when the base goes "Hi" during BU applied.
ON when the base goes "Hi" during ACC applied.
ON when the base goes "Lo".
Output voltage 7.4V
ON when the base goes "Hi".
ON when the base goes "Lo".
The buffer for composite signals.
ON when the base goes "Lo".
ON when the base goes "Lo".
Audio Pre-output is muted when the base goes "Hi".
ON when the base goes "Lo".
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Operation
Operation
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