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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!
Appendix. How to measure optical power
Optical power measurement is measuring actual optical power coming out from an object lens with LD turned on. thus, In order to measure optical power, LD should to be turned on and environment need to be dark enough. If necessary, Cover the top side of the sensor with black paper or hand when measuring. Generally, fluorecent light is about 50 µW, sun light is about 100 mW. so, If this is ignored, optical power setting may not be set correctly. Optical power mesurement procedure 1. Adjust optical power meter�s λ(wave length) to DVD. (Generally 650 nm) 2. Turn DVD LD on. 3. Place sensor less than 3mm apart from pick-up object lens, perpendicular to lens. Adjust position so that the center of object lens match to L mark on the sensor. 4. Read monitor�s value. (Read Maximum value as moving position slightly) (Check working unit. Unit should be mW. When LD is dead, µW or nW unit may not be read correctly.) 5. Multiply monitor�s value by 100, round off to the nearest integer, then write constant part. 6. Adjust optical power meter�s λ (wave length) to CD. (Generally 780 nm) 7. Turn CD LD on. 8. Repeat step 3~5 above.
L
Display Part
3-105
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