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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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Emerson LCD TV/DVD combo DEAD
I have a one year old Emerson LCD TV/DVD combo model # LD200EM8
Dead set, I found AND replaced the following faulty parts in the SMPS section: *shorted MosFet switcher transistor on primary Q601 2sk3563 *shortet "fast" diode on secondary D901 *open line fuse 4 amp GMA *shorted zener diode on primary D624 (39 volt, I think) Note: It is hard to read the markings on the burnt zener D624, I "think" it is a 39 volt zener, MTZJT-7739B, although it might be a 33 volt MTZJT-7733B instead, or something different, can anyone confirm the correct voltage? I have tried to power up the unit and NOTHING. None of the parts I replaced were damaged, I have primary B+ but nothing else. What have I missed on this single board chassis? Anyone having experience and a diagram on this unit would be most welcome. Any repair ideas from you smart people out there???? Common "dead set" issues with this unit? Help. thanks, electricitym |
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