KDC-305RG/3018R/3090R/A/G/YA/YG
3
COMPONENT DESCRIPTION
●
SWITCH UNIT(X13-9872-XX)
Ref.No.
Component Name
Application/Function
Operation/Condition/Compatibility
IC1
LC75883E
LCD driver
Ready on key-matrix
Q1
DTA114EKorKRA102Sor
key-matrix permission SW
Ready on key-matrix, ON when the base goes "Lo"
UN2111
●
ELECTRIC UNIT(X25-8712-XX)
Ref.No.
Component Name
Application/Function
Operation/Condition/Compatibility
IC1
UPD780058GC232
System
µ
-COM.
IC2
TDA7407D
E-VOL. & N.C. MPX
IC4
TDA7386
Power IC
IC6
TDA7479D
RDS decoder
IC7
BA4911-V4
Power supply IC
IC8
HD74HC27FP
Mute gate IC
3 input NOR gate x3
IC11
S-80830ANNP
RESET IC
Detection voltage 3.0V
IC12
BR24C01AForBR24C01AF-W
E2PROM
M24C01-WMN6TorS-24C01B
Q10
2SC4081or2SD1819A
B.U. detection
Detect BU voltage
Q20
2SC4081or2SD1819A
ACC detection
Detect ACC voltage
Q40
DTA124EUAorUN5112
PREOUT mute driver
Mutes when base is "Lo" (controls Q221-224)
Q50
2SA1036K
SW 5V
ON when the base is "Lo".
Q51
UMC2N
SW 14V
ON when the base is "Hi" (controls Q55)
Q53
UMC2N
Switch for power supply IC
ON when the base is "Hi" (controls SW1 pin of power
supply IC)
Q55
2SD2375or2SD2396
AVR for SERBO +B
Output issued when SW14V is on (base is "Hi")
Q70
2SC4081or2SD1819A
SURGE detection
Detect SURGE voltage
Q101
2SC4081or2SD1819A
DSI SW
DSI LED turns ON when base is "Hi"
Q102
DTA114YUAorUN5114
PANEL 5V SW
ON when the base is "Lo"
Q201
2SC4081or2SD1819A
NOISE Buff
Q223,224 DTC143TUAorUN5216
PREOUT MUTE
Mute applied to PREOUT (output) when base is "Lo"
Q251
DTC114YUAorUN5214
Power IC SVR SW
Turns ON when base is "Hi" and capacitor on SVR
pin discharges
Q301
DTC124EUAorUN5212
FM Lo/DX SW
Turns ON during Lo. SEEK when base goes "Hi"
