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Broken SD1

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Broken SD1

Postby Luke JD » Mon Jan 14, 2019 12:23 am

Hey all,

I picked up a Boss SD1 a while back from ebay (a bit of a gamble, I know!) and whilst it worked for a week or so, it's now bitten the dust and won't output any signal (but will output if bypassed!).

I enquired at PMT Bristol into getting it repaired, but they said the price of the repair is more than the value of the pedal (or close enough to it, to justify buying a new pedal instead).

I'm studying a HNC in electronic engineering atm, so I'm more than happy to take it apart and have a tinker. Is it as simple as powering it up, putting a voltmeter on it and seeing which component has failed, and then re-soldering it?

All the best,

Luke
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Re: Broken SD1

Postby Hugh Robjohns » Mon Jan 14, 2019 12:31 am

Yes... It could be that simple... :D

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...or it might involve more investigative fault-finding skills.
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Re: Broken SD1

Postby zenguitar » Mon Jan 14, 2019 1:00 am

Have a chat with your tutor and discuss how he/she might help you use it as a project to develop your trouble shooting skills.

Win/win.

Andy :beamup:
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Re: Broken SD1

Postby Wonks » Mon Jan 14, 2019 10:21 am

From photos on the web, it looks like it still uses discrete components, so fault finding and replacement of parts is relatively easy.

Here's just one of several sites where the circuit is shown and semi-explained.

https://www.hobby-hour.com/electronics/s/sd1-super-overdrive.php

As you can currently get one new for less than £50, I can see why it's not really viable to have it repaired by someone else.

Note that there are quite a few DIY mods published to the DS1, so yours might be one that someone has played about with. Which may be the reason that it's failed. So first check for variations against the basic circuit.
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Re: Broken SD1

Postby Luke JD » Sat Jan 19, 2019 12:24 pm

Thanks very much for your replies, particularly the circuit board schematic! I'm going to pick up a multimeter on payday and I'll see if I can isolate the problem :) keen to learn so I can fix my own pedals in the future if I need to
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Re: Broken SD1

Postby The Bunk » Sat Jan 19, 2019 5:21 pm

If it's any help I've got one that I'm not using and haven't done so in years...happy to offload if it comes to it. Mind you I *do* need to check it's working first of course...!
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