DJpullchord Posted November 24, 2017 Share Posted November 24, 2017 Hi, I’ve acquired a Marshall footswitch to change channel for my guitar amp (90s Marshall combo) and it ain’t working. Is there an easy way to determine if it’s the footswitch that’s faulty, or a problem with the amp itself? It seems there’s no power to the footswitch as there is an led that’s refusing to light up. thanks. Quote Link to comment Share on other sites More sharing options...
BigRedX Posted November 24, 2017 Share Posted November 24, 2017 Are you sure it’s the right foot switch for that particular model of amp? Quote Link to comment Share on other sites More sharing options...
DJpullchord Posted November 24, 2017 Author Share Posted November 24, 2017 Not certain, thought they were universal? I opened it up and it looked like a badly made bomb. Loose wires and bust solder connections. Quote Link to comment Share on other sites More sharing options...
dmccombe7 Posted November 24, 2017 Share Posted November 24, 2017 i would have thought with an amp that age the switch literally is just a contact open or closed so any normal switch should work. Do you have a multimeter for checking continuity ? Check across the tip and main body of the jack plug and try switching it to see if the meter signal changes. I don't know this particular model tho and i'm no expert in amps so hopefully somebody with more technical knowledge will come along soon to help. Dave Quote Link to comment Share on other sites More sharing options...
dmccombe7 Posted November 24, 2017 Share Posted November 24, 2017 Sounds like its a bit of a disaster in there then. Quote Link to comment Share on other sites More sharing options...
DJpullchord Posted November 24, 2017 Author Share Posted November 24, 2017 It’s not pretty. I’ll order another footswitch...... Quote Link to comment Share on other sites More sharing options...
dmccombe7 Posted November 25, 2017 Share Posted November 25, 2017 Not 100% sure but i think the circuitry is to stop switch noise ? If you know someone that repairs electronics i might be an easy fix and cheap to sort. Worth asking your local repair tech or guitar shop if they can help before forking out for a new one. Is it the battery version or just a plain switch Does it have 2 jack plugs or one ? There are lots of schematics on line if you know someone that can solder. Doesn't look like much to most of them Quote Link to comment Share on other sites More sharing options...
DJpullchord Posted November 25, 2017 Author Share Posted November 25, 2017 It’s the Marshall pedl0009 theres no jacks but wired direct from a footswitch female jack in the amp. And powered from that so no batteries. It’s just to change channels. And a reverb switch that’s notoriously crap. the pedal is discontinued so I’ll have to find what they’ve replaced it with........ Quote Link to comment Share on other sites More sharing options...
dmccombe7 Posted November 25, 2017 Share Posted November 25, 2017 Does it look similar to this one inside Quote Link to comment Share on other sites More sharing options...
dmccombe7 Posted November 25, 2017 Share Posted November 25, 2017 Quote Link to comment Share on other sites More sharing options...
DJpullchord Posted November 25, 2017 Author Share Posted November 25, 2017 Hang on, I’ll go grab it....... Quote Link to comment Share on other sites More sharing options...
DJpullchord Posted November 25, 2017 Author Share Posted November 25, 2017 Red wire going nowhere. There’s solder in two places it could go to... Quote Link to comment Share on other sites More sharing options...
dmccombe7 Posted November 25, 2017 Share Posted November 25, 2017 Looking at your pedal i reckon the red wire should go to the centre pin on the left hand switch next to the blue wire. You can see there's been solder on that centre pin. I'm guessing there's only 1 led on your switch looking at the pic above. I can't see an LED on any of the images i've seen on line for this pedal and the way the LED strip has been secured with gaffa tape would suggest its been added as a modification.. Oddly enough the schematic i did find shows the LED's in parallel with the cabling to the amp whereas your led is in series. Hopefully someone on BC who knows about these things can clarify. Dave Quote Link to comment Share on other sites More sharing options...
DJpullchord Posted November 25, 2017 Author Share Posted November 25, 2017 Yep just one led. I wonder if there’s a way of bypassing the led and reverb and just using the channel selector, as that’s all I need? Youre right, the diagram is different to what I have. Also the second reverb switch looks it’s had beer or jam spilt on it. Quote Link to comment Share on other sites More sharing options...
dmccombe7 Posted November 25, 2017 Share Posted November 25, 2017 £30 buys a new one on-line Quote Link to comment Share on other sites More sharing options...
DJpullchord Posted November 25, 2017 Author Share Posted November 25, 2017 Yep can’t find the same one though, i appreciate your your help amigo Quote Link to comment Share on other sites More sharing options...
dmccombe7 Posted November 25, 2017 Share Posted November 25, 2017 https://www.amazon.co.uk/Marshall-PEDL-91003-Pedal-Two-Button/dp/B00KMVYREC/ref=sr_1_3?ie=UTF8&qid=1511641756&sr=8-3&keywords=marshall+pedl I believe this one does the same job with twin LED's PEDL91003. I checked the schematic and its virtually same item Dave Quote Link to comment Share on other sites More sharing options...
DJpullchord Posted November 25, 2017 Author Share Posted November 25, 2017 Cheers amigo. Quote Link to comment Share on other sites More sharing options...
dmccombe7 Posted November 26, 2017 Share Posted November 26, 2017 Might be best to check with Marshall that it will do same job but cant see why not. Quote Link to comment Share on other sites More sharing options...
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