Hello everybody,
I'm looking for advices to change the voltage on my unit. It works perfectly, I've tested it yesterday with a 220V/110V adaptator (I live in france..).
I don't want to buy an adaptator 220V/110V because it's really noisy and expensive. I've read the pcm70 manual and found the way to change the voltage (http://www.lexiconpro.com/downloads/PCM70/PCM70-OM.pdf page 9) but I'm afraid to burn my reverb if I do it myself. I asked a shop to do it but it's too expensive more than the adaptator!) and they may not be able to do it and I will be obliged to pay for nothing.. what a shame.
Did someone know if I can do it myself and know the pcm70 power supplying well ? It requires 3 steps including a welding. I know how to do a welding but can I use tin to make it ?
Just advices will help me if you can.
Thanks by advance,
Best regards.
Little smile to Sunburst59

This message has been edited. Last edited by: redhouseforever,

Here is the manual :
the 3 steps are writen at the end.


Here are the photos of the motherboard :


bigger here :http://67.19.16.106/zic/lexicon/pcm70/1.jpg


bigger here :http://67.19.16.106/zic/lexicon/pcm70/2.jpg


bigger here :http://67.19.16.106/zic/lexicon/pcm70/3.jpg


bigger here :http://67.19.16.106/zic/lexicon/pcm70/4.jpg


bigger here :http://67.19.16.106/zic/lexicon/pcm70/5.jpg


bigger here :http://67.19.16.106/zic/lexicon/pcm70/6.jpg


bigger here :http://67.19.16.106/zic/lexicon/pcm70/7.jpg


bigger here :http://67.19.16.106/zic/lexicon/pcm70/8.jpg


bigger here :http://67.19.16.106/zic/lexicon/pcm70/9.jpg

Thanks by advance from any help or advice.

Technically it looks fairly straight forward - although there's some unsoldering to be done as well, to remove the existing jumper setting. However, it looks like there's plenty of working space.

Big Warning, though - if you did it and made a mistake, it's not just going to be expensive (wreck the unit), it could be dangerous. You're fooling with mains power levels, and that can kill you. Plus, you would certainly void any warranty on the unit. And a final point - don't know about France, but in Australia it's illegal to modify or service mains powered devices unless you hold the appropriate qualifications.

you need to double check this but from what I see the jumper/black wire is soldered to the 120/240VAC voltage and the switch (SW3) is set to 100/120VAC meaning your unit is running on 120VAC and not 110VAC according to the position of the black jumper wire...

please be careful you wrote 110/220 it's 100/220VAC according to Lexicons instructions...

what is the voltage in France...in Germany we are 230VAC in which case running it at 220 or 240 VAC should be ok as most transformers have a +/- 10% tolerance...

as far as I can tell all you need to do to run the unit on 240VAC is to flip the switch to the top position as I am looking the picture...

to run your unit at 220VAC

then you have to unsolder the black wire from the 120/240VAC hole and resolder it in the 100/220VAC hole and flip the switch to the up position...if you have never soldered or unsoldered a circuit board before don't do this have someone do it for you...

Chow,
Seegs