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Radio display reverted from time to one digit “7”. Hit power button and there’s now no display or any function at all. When connecting or disconnecting power cord, there’s a short static sound indicating power is at least getting to the unit, but then nothing. Have replaced battery and cycled connecting and disconnecting power. Is this repairable? Thanks
+5 V voltage regulator shorted. Small transistor located Q4 across diode bridge. Update (03/01/2020) Hello everyone, for beginning, in this model is few revisions of main board, before fix it try to read schematic. My opinion. If you can tell me what part# you got on your main board, I can send you a copy of it.
Hope this image helps, Mike Casey mikec6@mac.com Q4.pdf
I’ve just repaired one with a similar issue. Sometimes you would get an odd character light up on the display, apart from that totally dead. Turned out to be the capacitor feeding the 12v regulator 35v 1000uf. I have just uploaded a video on YouTube diagnosing the problem, and repairing it. -BuyItFixIt
