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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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Ashdown MAG 300 amp, 2004
Both 6.3amp fuses blown, 2 diodes of the bridge rectifier s/c. Internal
failure of this bridge, dodgey looking splodge logo, presumably Fronter logo and 8amp rating, marked AC BP8-04 or something else to change as well? Main caps look ok and ESR (for what its worth in such cases) ok The 2 failed diodes are -ve to AC +ve to other AC Suspiciously 2 solder points look like crazed PbF solder but all is SnPb, melted and reformed? the 2 points are at the -ve terminal and the AC terminal of the other failed diode. Output devices DVM-D cold test as expected. No heated traces or even obvious gaseous eruptions from the bridge or anything out of the normal. No reported preceeding noises prior to failure. |
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