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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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On 21.02.2016 18:27, Dimitrij Klingbeil wrote:
On 20.02.2016 15:36, JC wrote: On 2/20/2016 7:55 AM, Cursitor Doom wrote: On Sat, 20 Feb 2016 01:14:09 -0500, legg wrote: Recheck pin function before jumping to conclusions. Right; now re-checked. DC measurments proved (unsurprisingly) too close together so I re-tested using 100khz instead. These are the impedances WRT ground of the output taps of the long winding in the order they actually come out of the transformer: GND, 0.17ohms, 0.17ohms, 0.26ohms, 0.28ohms, 3.7ohms, 3.8ohms. So this doesn't seem to tally up with the schematic. Or does it? I need a pint of strong coffee to kick-start my head on this one. :-/ Anyway, later... ... In one of your pictures there are a couple of diodes that look messed up (V1809 and V1811) near the bridge. They are supposed to be BY208-1000 (1000v rectifiers), I can see "40" on one, maybe 1N4007? If you can't find a BY208-1000 replacement, a MUR4100E(G) should work. Sorry, that may be physically too big to fit. A MUR1100EG or something similar should work and fit in the available space too. Dimitrij |
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