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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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Sony Trinitron KV-27TW70 Tuner Repair
Hi,
Picture and sound work great on our Sony Trinitron KV-27TW70, as long as we use a vcr tuner routed through the rear of the set a/v inputs. On occasion the tuner works properly, and when it doesn't there's anywhere from a slightly shrunken picture to a white flat line in the center. Believe the tuner has been repaired/replaced once, after possible damage by a power surge. Any tuner repair suggestions? Re-solder some specific connections? Thanks, Gerry |
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Sony Trinitron KV-27TW70 Tuner Repair
GerryO wrote:
Hi, Picture and sound work great on our Sony Trinitron KV-27TW70, as long as we use a vcr tuner routed through the rear of the set a/v inputs. On occasion the tuner works properly, and when it doesn't there's anywhere from a slightly shrunken picture to a white flat line in the center. Believe the tuner has been repaired/replaced once, after possible damage by a power surge. Any tuner repair suggestions? Re-solder some specific connections? Thanks, Gerry Sounds like two totally different problems. A defective tuner can give you a snowy picture, total snow, or a blank or blue screen. A shrunken picture or flat line are caused by a problem with the vertical deflection circuit. If both problems seem to come and go at the same time or seem to affect each other then I would suspect a problem with a voltage that supplies both the tuner and vertical section, or loose solder joints in the related circuits. |
#3
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Quote:
Thanks, Gerry |
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