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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.
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When I purchased this manual I had my doubts regarding the quality as the price was so reasonable as compared to other outlets.
The manual itself is of high standard the print is very clear as are the diagrams. Obviously with the diagrams one has to zoom in otherwise it is to small to be able to read.
Overall I am very pleased with the company who delivered as they said and with the manual they supplied.
I occasionally require a manual and now having registered with this company I shall order from them in the future.
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I was at first dubious about payiong for downloaded manuals but having done so, I was extremely impressed with quality of the two manual I ordered, well worth the small price I paid.
I would highly recommend these to my friends.
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reasonable price for the schematic - the service is perfect, all as expected and pointed by instructions - good scan of the original plans - thank you!
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Manual was just as described!!! I odered it and in less than a day was able to download it and the text was clear and pages were all complete just as the original manual was. Purcashed this for a friend and they were more than happy. Perfect all around!
KDC-MPV6022/622/7023
COMPONENTS DESCRIPTION
q CD PLAYER UNIT (X32-5410-00)
Ref.No.
IC1 IC2 IC4 IC6 IC7 IC8 IC11
Component Name
TAR5S33 NJM4580V BA5824FP L88MS33T 703033BYGC-J02 TC74HCT7007AF UPD63760GJ
Application/Functions
3.3V AVR Low pass filter 4CH BTL driver AVR MI-COM Level shifter CD signal processor
Operation/Condition/Compatibility
For audio circuit(3.3V AVR) 2nd low pass filter for audio signals Focusing coil, tracking coil, spindle motor and sled motor driver, disc loading and eject operation. 3.3V AVR Mechanism control microcomputer. Level shift for voltage 3.3V to 5.0V. Generation of RF signal based on the signals from the APC circuit and pickup,Focusing, tracking, sled and spindle servo processing. Automatic adjustment (focusing, tracking, gain, offset and balance) operations. Digital signal processing (DSP, PLL, sub-codes, CIRC error correction, audio data Interpol ration) operations, and MP3 decoder.
IC13 Q1 Q2 Q3 Q4 Q5 D1
MSM51V4265EP70 DTA143XUA DTC124EUA DTC124EUA MCH6101 DTA143EUA DAN202U
DRAM A.8V SW 3.3V AVR SW A.8V SW APC D.5V SW Protection diode
Data buffer When Q5 gose "ON", Q1 is ON When P ON signal gose "ON" Q2 is ON When P ON signal gose "ON" Q4 is ON LD power control When P ON signal gose "L" Q5 is ON Laser diode protection
q ELECTRIC UNIT (X25-9570-12/13/21)
Ref.No.
IC1 IC2 IC3
Component Name
UPD703030GC012 TDA7411 BA4911-V4
Application/Functions
System microcomputer Electronic volume & N.C.MPX Power supply IC
Operation/Condition/Compatibility
Control for TUNER unit, CD mechanism, volume & tone, LCD driver and external CD changer unit Control for source selector, volume & tone, and FM multiplex detector. Power supply for the units (Bu5V, Audio8V, FM+B, AM+B, P-con and ANT-con).
SW1 1.5-3.0V 3.5-5.0V 7.0VSW2 2.0-3.0V 4.0VOUT Audio ON Audio, P-con ON Audio, P-con, P-ant ON Illumination, FM ON Illumination, AM ON
IC4 IC6 IC8 IC9 Q1 Q2 Q3 Q4 Q21 Q22 Q23 Q31 Q41
TA8273H HD74HC27FP PST3436UL SI-8050JD 2SC4081 2SC4081 2SC4081 2SA1036K 2SD2375 UMC2N UMC2N UN5213 2SC4081
Audio power amp IC Muting control IC Reset IC Switching regulator Serge detection Backup detection ACC detection SW 5V AVR SW IC control Dimmer control SW
Amplifier for audio signal to derive for 4channel speakers (50W maximum for each channel). Control for timing for mute. When detection voltage goes below 3.5V or less Reset IC output change to "L" signal. Power supply for MP3 CD mecanism unit. When backup voltage become more than 24V output is "L" (momentary power down) / When backup voltage become less than 24V output is "H". When BU voltage supplied output is "L" / When BU voltage not supplied or momentary power down is detected output is "H". When ACC voltage supplied output is "L". When base voltage is "L" Q4 is ON. Servo regulator. Servo SW. Power supply IC controller. When base voltage is "H" dimmer is ON. Switching regulator control SW.
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