Description:
Fixing electronic equipment.
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Schematic for Sorensen PTM 15-3.5 linear power supply
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I know, real engineers and techs don't need schematics, but it would make this a lot easier. :) It's a linear power supply with OVP and the OVP isn't working. Now, that sounds pretty simple - a pot and zener and SCR. But it's not quite that simple and it may be that someone (like me) repaired this many years ago and... more »
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Microwave failing
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I have an 8-year-old Kenmore above-range microwave that is failing. Beginning a few month ago it started buzzing (sounds like a relay or chattering) and then it starts -- or not. The controller seems to work fine, and if it starts squirting microwaves it works fine, but more and more now it won't start and won't heat anything. What does it... more »
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Subbing an LCD TV Power Supply
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Over the past few months I've received a few cheapo LCD TVs with blown power supplies that could not be repaired, the reason being that replacement parts (or whole boards) were simply not available. Another one just came in with the same problem, and this time an idea occurred to me. The power supplies in these sets are pretty simple, at least in terms of... more »
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Two phases to house - loss of neutral
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I have to phases of power supply to my house - so three power lines, two phases plus neutral. I've on occasion wondered what would happen if we lost the neutral line. It seems to me that we'd then have the voltage between the two phases across two sets of appliances, one set attached to one phase, and the... more »
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ATX power supply repairs
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Of those brave souls who have ventured into trying to fix ATX supplies, what are you mainly finding wrong with them and how are you testing them? I know its hardly worth economically doing it. But its the challenge i guess. Most of the ones i have scrapped have not shown the typical cap failure. I have resoldered a few and replaced fans in some.... more »
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~~~~~TEst Bank and Solution manuals
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Comprehensive Test Banks and solution manuals Email me at allsolutionmanuals11[at]gmail. com if you need to buy any test bank or solution manual listed below. All emails will be answered quickly. Or visit [link] for a latest list of resources. 2009 Corporate, Partnership, Estate and Gift Taxation - James Pratt... more »
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TEst Bank and Solution manuals
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Comprehensive Test Banks and solution manuals Email me at allsolutionmanuals11[at]gmail. com if you need to buy any test bank or solution manual listed below. All emails will be answered quickly. Or visit [link] for a latest list of resources. 2009 Corporate, Partnership, Estate and Gift Taxation - James Pratt... more »
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