I've had a good bit of help from this place already, so I thought I'd share this on the off-chance it helps someone.
My MXR Chorus fried itself a while ago - I wasn't about to return it to the shop as I knew full-well it was my cheap-ass power supply that did the nasty when it shorted one day. So if you've got an analogue time-based effect (chorus, flange, delay, phase) that's no longer effecting, chances are it's the BBD (bucket-brigade delay) chip that's goosed. In my case, it was the part numbered 3207 in the bottom-left of the picture. £3 bought me a new one off Fleabay. Some pedals use obsolete parts that are now unavailable, in which case you might be out of luck.
I checked the pinouts as the new part was a different brand, and they were the same. So an hour with a solder sucker, I've dropped the new chip in and it's working a treat. I do have a background in electronics, but if I'm honest 98% of it was forgotten as soon as I was sat down with a Jalfrezi and a pint of Cobra on graduation day
. If I can do it with my moderate soldering skills and some careful reading, I'm sure it's not beyond the wit of any other electronics hobbyist with a steady hand, half a brain, a soldering iron and the internet.
Anyway, there you are. I might have a cold one to celebrate.
Comments
I said maybe.....
Also glad you've spotted my deliberate mistake . A phaser's going to use an LFO, of course it is! I told you it'd all gone to pot since I had that curry!
Well done for fixing that!
"Take these three items, some WD-40, a vise grip, and a roll of duct tape. Any man worth his salt can fix almost any problem with this stuff alone." - Walt Kowalski
"Only two things are infinite - the universe, and human stupidity. And I'm not sure about the universe." - Albert Einstein
@ICBM Thanks! I wasn't sure I could get the old chip out without cooking something with the iron, but a bit of patience paid off. The new chip in that picture isn't as neatly soldered as the rest of the circuit but I'm guessing these through-hole boards are wave soldered? If so I don't feel too bad.
As for the PSU, in this case it was entirely my fault for cheaping out and using a crap variable voltage switched-mode wall wart effort with one of those daisy chain cables. It was inevitable that it wasn't going to end well.
"Take these three items, some WD-40, a vise grip, and a roll of duct tape. Any man worth his salt can fix almost any problem with this stuff alone." - Walt Kowalski
"Only two things are infinite - the universe, and human stupidity. And I'm not sure about the universe." - Albert Einstein
Mental note made to buy some much more delicate snips which would have enabled me to simply cut the legs, like you suggested.
"Take these three items, some WD-40, a vise grip, and a roll of duct tape. Any man worth his salt can fix almost any problem with this stuff alone." - Walt Kowalski
"Only two things are infinite - the universe, and human stupidity. And I'm not sure about the universe." - Albert Einstein