pmd@cbnews.ATT.COM (Paul Dubuc) (08/28/88)
Well, as fate would have it, the power supply on my vintage Heath model H120 all-in-one computer went bad yesterday. I took it out and opened it up, replaced the blown fuse. The fuse promptly blew again when I had the thing back together and turned it on. According to Gern's article on the power supply, this means "serious trouble" (Q1, Q2, IC1, IC2 and output diodes may be bad). I haven't pulled the PC board out to inspect the foil side for heat scoring and cold solder joints, but the component side looks good. Assuming that bad components are the main trouble, I don't mind replacing them (I can solder), but I'm not that up to trouble shooting (even with Gern's schematic) to figure out which components are bad. (When Gern says "I only wish you the best of luck", I know that I probably will have no such luck.) If I can find a good source for the components that are likely to be bad, I'll give it a try just replacing them all and hoping for the best. Otherwise, I need a good source for a replacement power supply. The local Heath Computer Center wants $230 (with trade in). In this market, the computer isn't worth much more than that. Any help or advice that anyone can give would be very much appreciated. -- Paul Dubuc | "Americans no longer talk to each other, cbdkc1!pmd | they entertain each other." | Neil Postman |