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Thanks for offering this item at such a good price. Proved handy in identifying the part I was looking for my set.
Thanks again.
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This is the original manufacturers service manual, with detailed info on the circit boards, explosion drawings of all parts in assembly order, and tuning instructions. The only thing missing is the information on the dimensions of the various drive belts. mail me if you need them. gcrossman_at_aol.com
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Ordered service manuel for a hard to find plasma tv - your company made it easy to find and purchase - I will use you again
Thanks for your help
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This is a high quality manual with clear schematic and components layout diagrams ; with service procedure included.
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This service manual for the Kenwood KT-990D was reproduced really well ,is very legible and manual is complete.Combined with the low price paid,in the future,I will be checking Owner-Manuals.com any time I need a manual.
KCA-R70FM
COMPONENTS DESCRIPTION
q RF MODULATOR UNIT
Ref. No. IC1 IC2 IC4 IC101 IC102 IC301 IC302 Q1 Q2 Q3 Q4 Component Name UPC78M06AHF LC72366-9B28 NJM78L05UA NJM2060M NJM4565MD BA1405F NJM4565MD ALC detection amp. DTC124EK 2SA1782(T,U) POWER SW DTC124EK DTC143TK Reset SW and IC2 is holding. When RESET SW on display unit is pressed, Q5 is turned off, and Q5 DTC143TK CH RESET SW SYSTEM RESET signal is outputted to CD changer. When RESET SW on display unit is pressed or ACC is OFF, Q6 is turned Q6 DTA124EK Hold detection SW off, and IC2 is holding. FM modulator output / Vehicles antenna input switching. Q8 Q9 Q101 Q201 Q303 Q304 Q305 Q306 Q307 Q308 Q309 Q310 DTC143TK 2SC4640(T,U) 2SK2158 ALC control SW 2SK2158 2SA1162(GR) 2SK2158 2SK2158 2SK508L 2SC2714(Y) 2SK2158 2SK2158 2SK2158 Pilot mix amp. Level control SW Level control SW RF oscillator buffer RF amp. Mode (1/2) SW Audio mute Mode (1/2) SW Mode1 : ON, Mode2 : OFF POWER ON mode : OFF, POWER OFF mode : ON Mode1 : OFF, Mode2 : ON Level 1/2 : OFF, Level 3/4 : ON Level 2/4 : OFF, Level 1/3 : ON Relay driver When a base goes �Hi�, FM modulator output is selected. Ripple filter Power supply for RF amplifier working. When RESET SW on display unit is pressed, Q4,Q1 and Q6 are turned off, ACC detection When Q4 is turned on , Q1 is turned on during ACC applied. When Q3's base goes �Hi�, Q2 is turned on, and RF modulator circuit is Appication / Function BU 5V AVR System MI-COM. 5V AVR Isolation amp. Low pass filter FM ST modulator 1/2 VCC driver, Operation / Condition / Compatibility While BACKUP is applied, AVR outputs +5V. System control Power supply for FM modulator and RF amplifier
q CONTROL UNIT
Ref. No. IC1 IC2 Q1 Q2 Q3 Component Name LC75808W RS-21N 2SD2114K DTA144EK DTA144EK Appication / Function LCD driver with key-matrix Remote control light senser LED ON/OFF SW Key-matrix permition SW IC2 ON/OFF SW Ready on key-matrix Operation / Condition / Compatibility
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