Print Page - Marshall jmp-1 230V: How wire the internal transformer to work in 115V ?

Title: Marshall jmp-1 230V: How wire the internal transformer to work in 115V ?
Post by: Diyfr on July 19, 2008, 05:51:22 PM

Hi,

I bought a jmp1 from France (230V), and I have to do 2 mods to use it on 115V.
1/ change the fuse (T80 mA replaced by T160 mA)
2/ wire correctly the transfo. For that, I need your help. :wink:

As indicated in the jmp1 schematis (http://www.drtube.com/schematics/marshall/jmp1-61-04.pdf), I have to wire LK1 and LK3 for 115V.
I think I have to desolder the component soldered in LK2. Should I only solder 2 components in LK1 and LK3 ?
What is the name of these components (see the picture) ?

(http://i66.photobucket.com/albums/h261/chami86/jmp1115230.jpg)

Thanks guys !

Title: Re: Marshall jmp-1 230V: How wire the internal transformer to work in 115V ?
Post by: Seljer on July 19, 2008, 07:44:16 PM

yep, get rid of LK2, then both LK1 and LK3 need to be connected

the component is....well....a piece of wire

Title: Re: Marshall jmp-1 230V: How wire the internal transformer to work in 115V ?
Post by: Diyfr on July 19, 2008, 08:23:43 PM

Thx for your reply.
I have a 24 gauge wire.
What is the utility of the "black part" ?

Title: Re: Marshall jmp-1 230V: How wire the internal transformer to work in 115V ?
Post by: snap on July 20, 2008, 03:08:10 AM

So that a pick`n` place machine can grab it and manoeuvre it into the PCB.

Title: Re: Marshall jmp-1 230V: How wire the internal transformer to work in 115V ?
Post by: Ice-9 on August 13, 2008, 01:32:52 PM

Yeah thats exactly how to do it. I have converted a couple myself. I still own my jmp1 (240v uk) they rock, will never part with it

DIYstompboxes.com

DIY Stompboxes => Digital & DSP => Topic started by: Diyfr on July 19, 2008, 05:51:22 PM