bose wave radio
in [Repair]
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From: harold on 22 Sep 2009 11:50 hey guys, Im working on a bose wave radio m#awr1-1w I found a transistor shorted in the front of the power supply Q4 I replaced it and it came on and worked for a day. Now it has the same symptoms but Q4 is good. The symptoms are no sound , no display and when you unplug it , it makes a wierd discharge sound in the speaker. Any ideas. harold
From: "Jumpster Jiver" no on 22 Sep 2009 13:18 "harold" <lindseylevo(a)yahoo.com> wrote in message news:06645dc6-9300-4f44-acc7-bfb4bc76e6d0(a)f10g2000vbf.googlegroups.com... > hey guys, > Im working on a bose wave radio m#awr1-1w I found a transistor > shorted in the front of the power supply Q4 I replaced it and it came > on and worked for a day. Now it has the same symptoms but Q4 is good. > The symptoms are no sound , no display and when you unplug it , it > makes a wierd discharge sound in the speaker. Any ideas. > > harold Yes, Next time you find a bad component, try to find out why it went defective. Could be bad solder joints, bad capacitors, other transistors, etc. I would start by checking the components that are directly connected to the transistor you changed, and working your way out from there.
From: Arfa Daily on 23 Sep 2009 04:28 "harold" <lindseylevo(a)yahoo.com> wrote in message news:06645dc6-9300-4f44-acc7-bfb4bc76e6d0(a)f10g2000vbf.googlegroups.com... > hey guys, > Im working on a bose wave radio m#awr1-1w I found a transistor > shorted in the front of the power supply Q4 I replaced it and it came > on and worked for a day. Now it has the same symptoms but Q4 is good. > The symptoms are no sound , no display and when you unplug it , it > makes a wierd discharge sound in the speaker. Any ideas. > > harold If you don't have schematics, look for the six digit number on the main board, and mail me direct off-group. With that number, I should be able to fix you up with service info, and any help you might need with the repair. Note that there are several different versions of the Wave Radio, and the basic model number is not a lot of help with identifying them, or knowing which components you are actually referring to. Some versions have a fusible resistor fitted in the power supply, which fails for no apparent reason, but which may in your case have been stressed, if it's present, by the failure of Q4. The symptoms are pretty much what you describe when it goes open. Arfa
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