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I had been looking for a Manual for my CS2150 for quite a while -- in fact I had just about given up. I saw this site and decided to download the Manual. When I Received it by Email I was really pleased with what I got, with the result that My Kenwood 'Scope is now 100% repaired and working well. As an AV Serviceman, you need a good 'scope, and thanks to this site, and the Service Manual, I have been able to repair it. The Manual was a copy of the Factory Original and the copy was very clear, especially in the area of the Circuit Schematics, where You really need to be sure of what You are looking at.
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D. Geometry Distortion (All Preset Mode) :
1) The Contrast and Brightness control shall be properly adjusted at 20 F-L with full intensity reverse pattern, then change to crosshatch pattern. 2) Pincushion distortion shall be less than H : 1.5% and V : 1.5%. 3) Barrel distortion shall be less than H : 1.5% and V : 1.5%. 4) Trapezoid and parallelogram distortion shall be less than H : 1.5% and V : 1.5%. 5) Distortion of four corners shall be less than 3mm x 3mm. 6) Parallelogram distortion shall be less than 2.0% 7) Tilt distortion shall be less than 1/2 degree when facing east and less than 1 degree when turning around 360 degree. 8) Tilt distortion shall be less than 2 mm when facing east and less than 1 degree when turning around 360 degree The measurement of tilt is defined to measure the vertical axis with respect to the bezel, the absolute value of the difference between the extreme left and right measurement of the center horizontal line.
E. Alignment Procedure
E-1. Brightness Adjust: Adjust the VR980, have the +15VS By 14.9V±0.1V (The voltage of the C944) in TIMING 1. Check below items. The voltage of C949 : 179 ± 3V C947 : 75 ± 2V C946 : 44 ± 1.5V C940 : 8.4 ± 0.4V P990 : 12 ± 0.3V Short-Circuit protection function check. The power source is 230VAC input. When short the C944, all output voltage should be shut down and unlatch. When recover normal condition, all output voltage should recover automatically.
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