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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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magnavox Mod RL8570,chas PTV380
HI ALL
Magnvox PTV380 , can not get Vertical center. Have no Schmatic working from bits and pieces of other s Schmatic's I'v changed the Vert IC ,checked voltages around the vert IC,all look good . Have +20 ,-20 at conv PRW Supply, +12,-12 at the conv BD. The more checks and Adj I make , Looks more like some thing wrong in Vert IC Section . missing bottom portion of sweep with a trapazode effect.maybe I should try another Vert IC . Just checked D552 off pin 1 of Vert IC. Is this doide paralleled with a resistor .getting a bad read on this . If Anybody has seen this problem or has any ideas I would sure appreciate It .Anybody have a schmatic for this PTV380 Thanks Bob Searcy |
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