Kenwood KD-C517FM, Service Manual

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KDC-C517FM, C717/Y
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COMPONENT DESCRIPTION
Ref.No. Component Name Application/Function Operation/Condition/Compatibility
IC1 UPC7805AHF BU 5V AVR While BACKUP is applied, AVR o5V.
IC2 LC72329-9274 System MI-COM. System control
IC4 NJM78L05UA 5V AVR Power supply for FM modulator and RF amplifier
IC101 NJM2060M Isolation amp.
IC102 NJM4565MD Low pass filter
IC301 BA1405F FM ST modulator
IC302 NJM4565MD
1/2 VCC driver,
ALC detection amp.
Q1 DTC124EK ACC detection When Q4 is turned on , Q1 is turned on during ACC applied.
Q2 2SA1782(T,U)
POWER SW When Q3's base goes "Hi", Q2 is turned on, and RF modulator circuit is working.
Q3 DTC124EK
Q4 DTC143TK Reset SW
When RESET SW on display unit is pressed, Q4,Q1 and Q6 are turned off,
and IC2 is holding.
Q5 DTC143TK CH RESET SW
When RESET SW on display unit is pressed, Q5 is turned off, and
SYSTEM RESET signal is outputted to CD changer.
Q6 DTA124EK Hold detection SW
When RESET SW on display unit is pressed or ACC is OFF, Q6 is turned
off, and IC2 is holding.
Q8 DTC143TK Relay driver
FM modulator output / Vehicles antenna input switching.
When a base goes "Hi", FM modulator output is selected.
Q9 2SC4640(T,U) Ripple filter Power supply for RF amplifier
Q101 2SK2158
ALC control SW
Q201 2SK2158
Q303 2SA1162(GR)
Pilot mix amp.
Q304 2SK2158 Level control SW Level1/2 : OFF, Level3/4 : ON
Q305 2SK2158 Level control SW Level2/4 : OFF, Level1/3 : ON
Q306 2SK508L RF oscillator buffer
Q307 2SC2714(Y) RF amp.
Q308 2SK2158 Mode(1/2) SW Mode1 : ON, Mode2 : OFF
Q309 2SK2158 Audio mute POWER ON mode : OFF, POWER OFFmode : ON
Q310 2SK2158 Mode(1/2) SW Mode1 : OFF, Mode2 : ON
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RF MODULATOR UNIT
Ref.No. Component Name Application/Function Operation/Condition/Compatibility
IC1 LC75852W LCD driver with key-matrix
IC2 PNA4602M Remote control light senser
Q1 DTC144EK
LED ON/OFF SW When Q1's base goes "Hi", Q2 is turned on, and LED is turned on.
Q2 DTB123YK
Q3 DTA144EK Key-matrix permition SW Ready on key-matrix
Q4 DTC144EK
IC2 ON/OFF SW
When Q4's base goes "Hi", Q5 is turned on, and 5V is supplied to remote
Q5 DTA114EK control sensor .
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DISPLAY UNIT
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