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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.
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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!
DESCRIPTION OF BLOCK DIAGRAM
1. Input Signal Part It is composed of three parts. -PC signal input part:15pin D-Sub and PC Audio input jack. -AV Video input part: RCA Jack(CVBS signal) -TV signla input part: TV Tuner input Connector(TV signal) 2. A/D Converter This block is composed of MST9883 (U5) and peripheral devices. MST9883 includes A/D converter, Pre-amp, and PLL. The basic RGB signal (0.7Vp-p) is input to R,G,B pin of MST9883(U5). Input video signal is amplified, Phase locking , A/D converts to 8bits digital signal by this IC(U4) and send the Digital video signal to EMH1(U9). 3. Digital Display Processor It is composed of EMH1(U9). It function that this IC(U9) converts desirable signal from AD Converter and Deinterlacer to operate LVDS part. 4. Deinterlacer This block is composed of MX88L284FC(U19) and peripheral devices. MTV230M(U15) controls this IC through IIC Line. And this IC convert 8 Bit Interlace Y/UV signal to Deinterlace signal. It output converted signal to Format Converter. 5. Panel-Link Circuit LVDS Transmitter (THC63LVD273, U2) is the IC that receives output digital signal of EMH1(U9) and output to LCD Module. 6. Micom Controller It is composed of MTV230MS(U15), its functions is controlling each IC, display mode and frequency through EEPROM and IIC comunication. 7. Inverter It functions that Input Power 12V converts 480Vrms to operate LCD lamp. 8. Video processor part. This block is composed of VPC3230D (U16) and peripheral devices. MTV230M(U15) controls this IC through IIC Line. This IC analyzes input signal of CVBS, Y/C and output analyzed signal (8bit interlace signal) to De-interlace block. Analyzed signal has video control signals like Contrast, Brightness, Sharpness, Color, tint signals Including Adaptive Comb Filter. 9. Audio processor part. This block is composed of MSP3410G (U7) and peripheral devices. MTV230M(U15) controls this IC through IIC Line. This IC analyzes Audio input signal through A/V Jack and PC audio. And output the analyzed signals to Audio Amplifier (TDA7268). 10. Audio Amplifier This block is composed of TDA7268 (U22) and peripheral devices. It amplifies audio signal input from Audio Decoder and output amplified audio signal to Speaker,Audio Output Jack. 11. Power part. It functions that Input power 12V converts TV-5V,AV5V,8VA and It functions that Input power 5V converts 2.5VD,2.5VA,3.3VS,3.3VD,3.3VA. 12. Control. It receives outer key input, transmits the input to Micom(U15). There is key input part and remocon receiver. 13. Teletext. It receives text information signal and displays text information through Text receiver Decorder. It called multi-text broadcast.
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