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
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.
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.
Text excerpt from page 28 (click to view)
3.) The image displayed with picture noise issue. Press Â“INPUTÂ” button to re-catch the signal again. Check the signal cable. Check Main BD if there is no picture noise issue when you input the signal with the other connector.
Judge Change Main board. 4.) The image displayed with Dead Pixel/Line issue. Check the DMD chip if the bright dot issue when you input the signal. Judge Change DMD board or DMD chip. 5.) The image displayed with focus issue. Adjust the focus ring. Ensure the projection distance is in spec. Judge Change Optical Engine Module 6.) The image displayed with flicker issue. Check the Lamp Module Ensure the signal cable works well. Press Â“INPUTÂ” button to re-catch the signal again. Judge Change Main board or DMD board. 7.) The image displayed with uniformity issue. Ensure the projection lens is clean. Replace the lamp if the brightness is less than spec. Judge Change the Optical Engine Module. 8.) The image displayed with line bar issue. Check if the line bar issue that can be fixed by Â“FrequencyÂ” function of OSD menu or not. Judge Change Main board.