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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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Hitachi 50" rear projection. Dead!!
Model # 50UX57B, Chassis # AP83R, dead, was worked on elsewhere, both
convergence IC's were replaced, & E995, E996, as well as IK04, & IK05. D910, & D9110 12 volt zener diodes shorted, C707 near the flyback, & horizontal output are fine, the SMPS just won't oscillate! The three opto couplers check ok, as well as the SMPS electrolytics! Ideas anyone? Thanks, Dani. |
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#2
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Hitachi 50" rear projection. Dead!!
On Jul 23, 9:54 pm, Dani wrote:
Model # 50UX57B, Chassis # AP83R, dead, was worked on elsewhere, both convergence IC's were replaced, & E995, E996, as well as IK04, & IK05. D910, & D9110 12 volt zener diodes shorted, C707 near the flyback, & horizontal output are fine, the SMPS just won't oscillate! The three opto couplers check ok, as well as the SMPS electrolytics! Ideas anyone? Thanks, Dani. How does the pulse look did you check peak to peak & freq |
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