Question about Bose Wave Radio
Older Bose Wave Radio- Does not have CD
Radio powers up...display lights up. Everything looks normal. When you turn on the radio or aux (ipod) you don't hear anything right away, but after a few seconds you hear a loud screeching noise coming through the speakers. Buttons become useless.
Must pull plug to stop noise.
Plug in radio...start again...same result.
I can tell you what to check if you know how to use an ohmmeter. But I warn you you could get shocked if you do not know what you are doing. The transformer has 3 windings, two are for DC voltages, and the other is 3V AC.Your meter can measure those using the AC scale. Next, check the voltage on the 3 terminal regulator IC. One leg will have 18V, the output will have 10V. Again please use CAUTION! Finally, the to-92 transistor Q1 is used as a 5V regulator. Check it (with power off and unplugged) for any shorts, especially base-emitter. If non of these ideas work, I would offer to buy your non working unit if you decide to get rid of it.
Posted on Jun 30, 2009
Seems to be a common problem with these radios. check my post at what to look at . the mosfet guy.
Posted on Feb 02, 2009
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Posted on Jan 02, 2017
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