Hello Forum,
The attached picture is the power supply of the Boss GT-Pro Guitar Amp Modelling Effects Processor. It is over 10 years old. No physical movement, banging around, etc. It just sits in the studio. Power on and off daily over the course of a decade. Here is the problem. It has recently not powered on when I flip the power switch. I have to unplug, wiggle wires, tap the transformer lightly with the butt end of a screwdriver, wiggle the capacitors, etc. Plug back in, flip the switch and it powers on. Very frustrating, as it's functionality is 100% tested good during performance. I have tested the power switch with a continuity meter. I have tested the wiring with a continuity meter. All okay with no shorts. I have used a magnifying glass to inspect for obvious component failure tell tells...all okay. I have not pinned down yet exactly what event will get it to reengage, as I have only done this cover off tweaking process about a dozen times. A long time ago ('60s), my dad showed me how to temporarily fix a failing flyback transformer on a TV without knocking myself across the room due to current. He would hit it with the butt end of a screwdriver, it would reengage, and all was well again. You could keep doing this until it just died. Don't understand why, but it was a temp fix. I am suspecting the same thing with this power supply, but I just don't know. I have NO SCHEMATICS FOR THIS UNIT. I do have some knowledge as I have built motherboards, embedded systems, firmware, assembly language, etc., but I am not an EE. I do have good tools, such as a good meter, probes, oscilloscope, etc., but without a SCHEMATIC, I am lost as I am not an EE. I even have a LOT of components such as capacitors (such as shown in the picture), resistors, gates, etc...as I cobble a lot. I am at the end of my troubleshooting prowess.
Forum, what in your opinion would be the best way to troubleshoot this problem, I REALLY want to fix this because I LOVE this unit and it works (when the power is on . I already looked for parts such as the power supply and cannot find one. I would have bought it and replaced it component by component, but to know avail. I even thought of testing the voltage outs and building my own, but I would need a senior advisory to do that (I know what blue sparks are and their result
Any advice from you all would be GREATLY appreciated. Thank you, in advance, for your opinions.
Best
The attached picture is the power supply of the Boss GT-Pro Guitar Amp Modelling Effects Processor. It is over 10 years old. No physical movement, banging around, etc. It just sits in the studio. Power on and off daily over the course of a decade. Here is the problem. It has recently not powered on when I flip the power switch. I have to unplug, wiggle wires, tap the transformer lightly with the butt end of a screwdriver, wiggle the capacitors, etc. Plug back in, flip the switch and it powers on. Very frustrating, as it's functionality is 100% tested good during performance. I have tested the power switch with a continuity meter. I have tested the wiring with a continuity meter. All okay with no shorts. I have used a magnifying glass to inspect for obvious component failure tell tells...all okay. I have not pinned down yet exactly what event will get it to reengage, as I have only done this cover off tweaking process about a dozen times. A long time ago ('60s), my dad showed me how to temporarily fix a failing flyback transformer on a TV without knocking myself across the room due to current. He would hit it with the butt end of a screwdriver, it would reengage, and all was well again. You could keep doing this until it just died. Don't understand why, but it was a temp fix. I am suspecting the same thing with this power supply, but I just don't know. I have NO SCHEMATICS FOR THIS UNIT. I do have some knowledge as I have built motherboards, embedded systems, firmware, assembly language, etc., but I am not an EE. I do have good tools, such as a good meter, probes, oscilloscope, etc., but without a SCHEMATIC, I am lost as I am not an EE. I even have a LOT of components such as capacitors (such as shown in the picture), resistors, gates, etc...as I cobble a lot. I am at the end of my troubleshooting prowess.
Forum, what in your opinion would be the best way to troubleshoot this problem, I REALLY want to fix this because I LOVE this unit and it works (when the power is on . I already looked for parts such as the power supply and cannot find one. I would have bought it and replaced it component by component, but to know avail. I even thought of testing the voltage outs and building my own, but I would need a senior advisory to do that (I know what blue sparks are and their result
Any advice from you all would be GREATLY appreciated. Thank you, in advance, for your opinions.
Best
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