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January 26, 2012

Most Repairs are Easy – Fixing an Old Hitachi Receiver

Filed under: repair,Uncategorized — Tags: , , , , — admin @ 1:34 pm

As you can see throughout this blog, I do a lot of repairs of durable goods ranging from cars to electronics. I’m writing a book on closely related topics now (stay tuned here for publication news). One of my contentions is that most repairs are quite easily accomplished with only a small set of tools and rudimentary expertise. In addition, often, the source of the problem can be found by simple visual inspection. Here is one such example.

The Failed Switch

The Failed Switch


I had in my electronic “junk pile” an old Hitachi SR-5150 stereo receiver that a neighbour had discarded in the fertile back lanes of Vancouver, BC. The SR-5150 is roughly early 1970’s vintage; it is all solid state and has all discrete transistors (the power transistors are even Hitachi’s own), and an analog FM tuner driven mechanically with pulleys and a flywheel. Nothing high end, maybe 20-30W per channel judging from the power supply. The receiver was dead to the world; it would not show any signs of life when turned on. I was motivated to fix the thing because I was looking for a decent amp to use as part of a new sound system centred on a home computer. (more…)

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