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Electronics Repair (sci.electronics.repair) Discussion of repairing electronic equipment. Topics include requests for assistance, where to obtain servicing information and parts, techniques for diagnosis and repair, and annecdotes about success, failures and problems. |
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#1
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I managed to access the service menus and found the following settings
for Drive and Bias. FYI the outside numbers are the min. and max. limits, the number in the middle is the setting itself. RED DRV: 0 - 65 - 127 BLU DRV: 0 - 63 - 127 RED BIAS: 0 - 127 - 255 GRN BIAS: 0 - 147 - 255 BLU BIAS: 0 - 141 - 255 Some experimentation: Raising and lowering the DRV(drive) settings doesn't effect the picture until you get near the upper or lower limits. OTOH Bias produces very noticeable results even 5 points in either direct. Cutting just the RED BIAS still leaves people a little high fever. I even tried boosting the Green & Blue bias a couple of clicks and turning down the User brightness a couple clicks. This seemed to fix the problem - albeit slightly. I have centered all my user settings(range 0 - 64, center=32) pending any suggestions you guys may have. On the user side though, it should be noted that raising the Brightness seems to eliminate the red push, where as lowering it below midpoint seems to leave a very reddish picture. I would like any suggs. you may have on this. **DISCLAIMER: I have had trouble getting replies from you folks on this issue before and got no replies. If you are afraid of giving me the wrong advice which leads to the destruction of my set then you have some real issues! Get over it and start using the muscle upstairs. I expect AT LEAST 5 good replies out of you people by Saturday afternoon and enough of this legal crap.** thanks, -ChrisCoaster |
#2
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You need to follow the gray scale adjustment procedure in the service
manual for the set. Odds are that set uses some form of AKB and auto color tracking so you need to apply the correct signal from the generator and adjust it per the service manual. The set may need a full check out of the screen voltage, bias levels, and drive levels, then the color decoder levels will need checked. David |
#3
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