Kenwood KDC-5018, Service Manual

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KDC-5018/516S/57MR
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COMPONENTS DESCRIPTION
Ref.No. Component Name Application/Function Operation/Condition/Compatibility
IC1 LC75808W LCD driver with the key matrix
IC2 RS-171 Remote sensor IC
Q1 DTA114EUA or KRA302 Key-permission SW For the key scanning start
Q5 2SC2412K or 2SD601A VLCD AVR
Q6 DTA114EUA or KRA302 REMO SW
While a base goes "Lo", PAN 5V is supplied to the
Remote sensor IC.
Q7 DTC143ZK Dimmer SW
Usually Q7's base goes "Hi". When DIMMER mode is
selected, pulse wave shape is applied to Q7's base.
Ref.No. Component Name Application/Function Operation/Condition/Compatibility
IC1 UPD703033GC057 System MI-COM.
IC2 TDA7407D E.VOL & N.C.MPX IC
IC3
HD74HC02FP
or TC74HC02AF
Mute logic 2-input NOR x 4
IC4 TA8263BH Power AMP. IC
IC8 S-80837ANNP Reset IC When BU 5V voltage is less than 3.7V, IC outputs "Lo".
Q1 DTC143TUA or KRC410 Pre mute (Front L) When Q1's base goes "Hi", Pre-output is muted.
Q2 DTC143TUA or KRC410 Pre mute (Front R) When Q2's base goes "Hi", Pre-output is muted.
Q5 DTC143TUA or KRC410 Pre mute (Rear L) When Q5's base goes "Hi", Pre-output is muted.
Q6 DTC143TUA or KRC410 Pre mute (Rear R) When Q6's base goes "Hi", Pre-output is muted.
When BU detection SW or System RESET or MI-
Q7 DTA124EUA or KRA303 Mute driver COM.'s Pre-mute is working, a base goes "Lo",
and Q7 is turned on.
Q11 2SC4081 or 2SD1819A
BU 5V AVR
While BACKUP is applied, AVR o5V.
Q12 2SB1548(P) Q11 and Q12 are inverted Darlington connection.
Q13 2SA1576A or 2SB1218A SW 5V
While a base goes "Lo", SW 5V is supplied to the
microprocessor peripheral circuits.
Q14 2SC4081 or 2SD1819A
A8V AVR When Q14's base goes "Hi", A8V AVR outputs 8V.
Q15 2SB1548(P)
Q16 DTC124EUA or UN5212 A8V AVR and SERVO +B AVR ON/OFF control
Q17 DTA124EUA or KRA303
SW14V SW While Q16's base goes "Hi", Q17 is turned on,
A8V AVR and SERVO +B AVR are working.
Q18 2SD2375 SERVO +B AVR When Q18's base goes "Hi", SERVO +B AVR outputs 8V.
Q19 DTC124EUA or UN5212 ILL +B AVR ON/OFF control
Q20 DTA124EUA or KRA303
ILL +B SW While Q19's base goes "Hi", Q20 is turned on,
and ILL +B AVR is working.
Q21 2SB1184 While Q22's base goes "Hi", AVR o10.5V.
Q22 2SC4081 or 2SD1819A
ILL +B AVR Works during POWER ON mode with a panel attached
to the set.
Q25 DTA123JK or KRA105S EXT. AMP CON. SW When a base goes "Lo", Q25 is turned on.
Q26 DTC144EUA or UN5213 Small lamp detection SW When vehicle small lamps turn on, Q26 is turned on .
Q27 DTC114YUA or UN5214
P-CON SW
When Q27's base goes "Hi", Q32 is turned on .
Q32 2SB1277(Q,R) Works during POWER ON mode.
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SWITCH UNIT (X13-9960-13)
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ELECTRIC UNIT (X25-8770-XX)