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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 Model KV-27V10 standby power problem
Sony Model KV-27V10 (Chassis SCC-F85L-A) with standby problem. Unit
received with no start symptom. Replaced usual parts, Q601,Q602,R607(.1ohm), and horizontal out. Changed cap in horizontal drive section. Resolder terminals on horizontal drive transformer. Discovered ring cracks on base of original horizontal out. Try to startup set. No way. Found no standby power in secondary side of T605. Found R644 (6.8 ohm fusible) blown on primary side of transformer. Replaced. Start tv while monitoring 5 volt standby test point TP95. Initial power began at 5.85 volts and slowly declined to about 4.3 volts when R644 blew again. Within seconds, R607, Q601, and Q602 blew again. Please help. -- Posted via Mailgate.ORG Server - http://www.Mailgate.ORG |
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