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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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Daewoo TV DTW-28W2-100D (WP-811/CP-810 chassis) has vertical bars
Hello all,
I've Daewoo DTW-28W2-100D 100Hz 16:9 television set, which uses WP-811 chassis (similar to CP-810 in other Daewoo sets). I'm quite happy with it, but it shows several darker vertical bars which extend from the top all the way to the bottom of the screen (one is 3 inch wide, others are narrower), which are very visible on RBG connection, but are also visible on other sources (antenna input and etc.). These bars are very stable and move only when changing zoom ratio on TV, and appear immediately after turning TV on. I've a service manual for this TV set, and I also have electronics skills, but I'm not quite good with these highly integrated TV sets. Maybe you know a cure to this problem, which part is a likely suspect? Thank you. Regards, Mindaugas |
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This is usually caused by decoupler capacitors going bad in the power
supply, and or the horizontal scan circuits. They can be tested with an ESR meter. If you are not trained, and equipped to do TV service, you will have to give the set out for proper service. This type of repair is generally not too expensive. -- Jerry G. ===== "Mindakas" wrote in message oups.com... Hello all, I've Daewoo DTW-28W2-100D 100Hz 16:9 television set, which uses WP-811 chassis (similar to CP-810 in other Daewoo sets). I'm quite happy with it, but it shows several darker vertical bars which extend from the top all the way to the bottom of the screen (one is 3 inch wide, others are narrower), which are very visible on RBG connection, but are also visible on other sources (antenna input and etc.). These bars are very stable and move only when changing zoom ratio on TV, and appear immediately after turning TV on. I've a service manual for this TV set, and I also have electronics skills, but I'm not quite good with these highly integrated TV sets. Maybe you know a cure to this problem, which part is a likely suspect? Thank you. Regards, Mindaugas |
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