Kenwood KDC 4015 Service Manual

Page 3

KDC-3158/V/4158
4015/4016/CG

COM PONENT DESCRIPTION

OSWITCH UNI'I'(X]3-9680-1X)
RehNo. Component Name Application] Function Opeation/ Condifion/ Compatibility
IC1 LC75853NE LCD driver with key-matrix
IC2 RS»171 Remote control light sensor
01 DTA114EKorUN2111 key-matrix permission SW Ready on key-matrix
oELECTRIC UNIT(X25-8430-XX)
RehNo. Component Name Application] Function Operation] Condition/ Compatibility
IC1 UPD7800586C144 System M I»COM.
IC2 TDA74OOD E»VOL. & N.C. M PX
|C3 PST9130NR Reset IC Lo": Detection voltage below 3.0V
IC4 TDA7386 Power IC
|C5 HD74HC27FP Mute logic 3 input NOR gate x3
01 2S81565F(E,F) Inverted darlington connection
BU 5V AVR
02 2SC174OS ON during BU applied
03 DTA124EKorUN2112 SW14V Audio 8V AVR and Servo AVR ON/OFF control
04 DTC144EKorUN2213 Q3 is turned ON when 04's base goes Hi".
05 2SB1184 Audio 8V AVR 05 is turned ON when 06's base goes Hi".
06 2SC174OS Inverted darllngton connection
07 2SD2396F40 Servo AVR ON when the base goes Hi.
08 DTC144EKorUN2213
09 DTA124EKorUN2112 . _ _
Illumination AVR 010 IS turned ON when 08's base goes HI".
010 2SB1184
011 2SC174OS
012 2SC174OS BU detecnonlllomenlary powerdown detection) ON when the base goes Hi during BU applied.
013 2SC174OS ACC detection ON when the base goes Hi during ACC applied.
014 2SA1036K SW 5V ON when the base goes Lo.
015 2SBlZ77(0,R) RANT SW 015 is turned ON when 016s base goes Hi".
016 DTC114YKorUN2214 ON during FM/AM reception
017 2S81277(0,R) P»CON SW 017 is turned ON when 020s base goes Hi".
020 DTC114YKorUN2214 ON while power is on or CD loading/eject.
018 2SA1037K , Protect 017 by turning ON when P-CON output is grounded.
P»CON protection .
019 DTA124EKorUN2112 Prevents 018 tuning ON during start-up after power ON.
050 DTC144EKorUN2213 RESET SW System RESET is activated when the panel reset SW is pressed.
0150 DTC114YKorUN2214 SVR SW POWER IC RESET is activated when the base goes Hi".
0151 DTC143TKorUN2216
0152 DTC143TKorUN2216 _ _ .
Audio mute SW Audio pre-outs are muted when the base goes HI".
0153 DTC143TKorUN2216
0154 DTC143TKorUN2216
0155 DTA124EKorUN2112 Mute driverforAudlo mute SW ON when the base goes Lo.
0156 DTC144EKorUN2213 E»VOL. mute SW E-VOL. is muted when the base goes Hi".
0200 2S81277(0,R) FM +3 SW 0200 is turned ON when 0201s base goes "Hi".
0201 DTC124EKorUN2212 ON during FM reception
0202 2S81277(0,R) AM +8 SW 0202 is turned ON when 0203s base goes Hi".
0203 DTC124EKorUN2212 ON during AM reception
0207 2SA1037K Panel detection SW ON when the base goes Lo" during the panel closed.