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inverter killed my guitar looper pedal

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blue-moves

New Member
I plugged my Digitech JamMan Stereo (9v guitar FX pedal) into an inverter (12v system in campervan) and it worked for about 15 seconds and now it's DEAD!!

2 questions: What have I done to it?, and, How do I fix it?

(my mate says it's because it's NOT a PURE sine wave inverter...?)
 

alec_t

Well-Known Member
Most Helpful Member
Welcome to ETO.
Can you provide a link to the inverter spec?
 

blue-moves

New Member
i'll have to check the inverter for make model etc. - not near campervan until tomorrow..

my mate reckons he's had a whole string of power supplies and units 'fried' until someone told him to get a 'pure' sinewave inverter (much more expensive than the regular 'modified' sinewave inverters)

i just thought that someone on here could tell me what component is most likely to have failed in my guitar pedal (ie. what does a "M.S.I." send to a device that a "P.S.I." doesn't?) - I have of course ascertained that the pedal is fried and not just the power supply. (checked it with a known working power supply).
 

Les Jones

Well-Known Member
Most Helpful Member
From the link Ian provided it looks like it uses a plug in power supply. I think it will be this that has failed. I think a switch mode power supply would be OK working from an inverter but an older type with a normal 50/60 Hz transformer may not like the waveform. I suspect thet the core would saturate, get hot and the thermal fuse would open.

Les.
 

Ian Rogers

User Extraordinaire
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a normal 50/60 Hz transformer may not like the waveform.
I agree.. But a switched mode 9vac might be hard to find.. I think a new transformer with 9vac out will fix the problem... Plenty on Ebay..
 
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