Components Description - Kenwood KDC-5018 Service Manual

G
SWITCH UNIT (X13-9960-13)
Ref.No. Component Name
IC1 LC75808W
IC2 RS-171
Q1 DTA114EUA or KRA302
Q5 2SC2412K or 2SD601A
Q6 DTA114EUA or KRA302
Q7 DTC143ZK
G
ELECTRIC UNIT (X25-8770-XX)
Ref.No. Component Name
IC1 UPD703033GC057
IC2 TDA7407D
HD74HC02FP
IC3
or TC74HC02AF
IC4 TA8263BH
IC8 S-80837ANNP
Q1 DTC143TUA or KRC410
Q2 DTC143TUA or KRC410
Q5 DTC143TUA or KRC410
Q6 DTC143TUA or KRC410
Q7 DTA124EUA or KRA303
Q11 2SC4081 or 2SD1819A
Q12 2SB1548(P)
Q13 2SA1576A or 2SB1218A
Q14 2SC4081 or 2SD1819A
Q15 2SB1548(P)
Q16 DTC124EUA or UN5212
Q17 DTA124EUA or KRA303
Q18 2SD2375
Q19 DTC124EUA or UN5212
Q20 DTA124EUA or KRA303
Q21 2SB1184
Q22 2SC4081 or 2SD1819A
Q25 DTA123JK or KRA105S
Q26 DTC144EUA or UN5213
Q27 DTC114YUA or UN5214
Q32 2SB1277(Q,R)

COMPONENTS DESCRIPTION

Application/Function
LCD driver with the key matrix
Remote sensor IC
Key-permission SW
VLCD AVR
REMO SW
Dimmer SW
Application/Function
System MI-COM.
E.VOL & N.C.MPX IC
Mute logic
Power AMP. IC
Reset IC
Pre mute (Front L)
Pre mute (Front R)
Pre mute (Rear L)
Pre mute (Rear R)
Mute driver
BU 5V AVR
SW 5V
A8V AVR
SW14V SW
SERVO +B AVR
ILL +B SW
ILL +B AVR
EXT. AMP CON. SW
Small lamp detection SW
P-CON SW
KDC-5018/516S/57MR
Operation/Condition/Compatibility
For the key scanning start
While a base goes "Lo", PAN 5V is supplied to the
Remote sensor IC.
Usually Q7's base goes "Hi". When DIMMER mode is
selected, pulse wave shape is applied to Q7's base.
Operation/Condition/Compatibility
2-input NOR x 4
When BU 5V voltage is less than 3.7V, IC outputs "Lo".
When Q1's base goes "Hi", Pre-output is muted.
When Q2's base goes "Hi", Pre-output is muted.
When Q5's base goes "Hi", Pre-output is muted.
When Q6's base goes "Hi", Pre-output is muted.
When BU detection SW or System RESET or MI-
COM.'s Pre-mute is working, a base goes "Lo",
and Q7 is turned on.
While BACKUP is applied, AVR outputs +5V.
Q11 and Q12 are inverted Darlington connection.
While a base goes "Lo", SW 5V is supplied to the
microprocessor peripheral circuits.
When Q14's base goes "Hi", A8V AVR outputs 8V.
A8V AVR and SERVO +B AVR ON/OFF control
While Q16's base goes "Hi", Q17 is turned on,
A8V AVR and SERVO +B AVR are working.
When Q18's base goes "Hi", SERVO +B AVR outputs 8V.
ILL +B AVR ON/OFF control
While Q19's base goes "Hi", Q20 is turned on,
and ILL +B AVR is working.
While Q22's base goes "Hi", AVR outputs +10.5V.
Works during POWER ON mode with a panel attached
to the set.
When a base goes "Lo", Q25 is turned on.
When vehicle small lamps turn on, Q26 is turned on .
When Q27's base goes "Hi", Q32 is turned on .
Works during POWER ON mode.
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