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Chorus issues.

Started by Richie_B, October 20, 2016, 02:38:21 AM

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rnolan

MJMP will (no doubt) be able to check its specs and let you know, I just tripped over it today and saw it's really cheap and will hopefully do what you need to trouble shoot the chorus issue. Although I note it requires some SMB soldering (surface mounted), from the you tubes I've watched re SMB you just need the right tip for your iron.. and you flux the board connectors prior to soldering (not that I've done any SMB soldering yet..).
Studio Rig: Stuff; Live Rig: More Stuff; Guitars: A few

MarshallJMP

I wouldn't buy those banggood scopes, yes they are cheap but quality isn't that good.

rnolan

But would it suffice to do a one off job (ie this job ?) and help get his chorus sorted ??
Studio Rig: Stuff; Live Rig: More Stuff; Guitars: A few

MarshallJMP

Let's say it's better then nothing.

DannyjoeCarter

Guys I'm following this thread closely because I have two MP-1 with dead choruses. Is there an actual chip ( IC ) that controls the chorus or is there a series of things? I'm hoping I can just swap out a chip with all the units my buddy and I have -
Owner of DeJayce Guitars
www.dejayce-guitars.com
www.youtube.com/dannyjoecarter
www.Faceb**k.com/dannyjoe.carter

MarshallJMP

There is a series of things.

DannyjoeCarter

Quote from: MarshallJMP on February 13, 2017, 03:23:14 AM
There is a series of things.

OK I don't remember if the unit I sent you has chorus issues but if it does have a look Sir  :)
Two of the units we have sound great but have dead chorus's and when you have time I will send to you  :)
Owner of DeJayce Guitars
www.dejayce-guitars.com
www.youtube.com/dannyjoecarter
www.Faceb**k.com/dannyjoe.carter

MarshallJMP

Well I just worked on your MP-1 ,it also had a dead chorus, but it was because the chorus bias pot was turned all the way down, returned it to the 11 o clock position and it works again (fine tuned it to the ADA specs).So check the bias pots on those units.

DannyjoeCarter

Quote from: MarshallJMP on February 13, 2017, 02:01:13 PM
Well I just worked on your MP-1 ,it also had a dead chorus, but it was because the chorus bias pot was turned all the way down, returned it to the 11 o clock position and it works again (fine tuned it to the ADA specs).So check the bias pots on those units.

Outstanding Sir!!!!!   :banana:
Owner of DeJayce Guitars
www.dejayce-guitars.com
www.youtube.com/dannyjoecarter
www.Faceb**k.com/dannyjoe.carter

Richie_B

I wish mine was just a bias pot issue. I tried again giving it another turn back and forth to see if it would help and no go. Still looking for an affordable scope... which is still proving to be a very frustrating exercise.
Guitars: Fernandes ST 40, FST 125, Fernandes TEJ LTD ED and a Vortex. Chapman ML3 Pro Modern.

ADA MP1, ENGL E530, ENGL 840/50 Power amp, Carvin X100B, 2X12 cab.

Richie_B

This could be the one.

http://cgi.ebay.com.au/ws/eBayISAPI.dll?ViewItem&item=112342193245
Guitars: Fernandes ST 40, FST 125, Fernandes TEJ LTD ED and a Vortex. Chapman ML3 Pro Modern.

ADA MP1, ENGL E530, ENGL 840/50 Power amp, Carvin X100B, 2X12 cab.

MarshallJMP

More then good enough.

Richie_B

I've been a bit busy of late and had to step back from sorting this issue. Regarding the scope, out bit on that one. I may be able to get a hold of another mp1 next week. I think it's an earlier version. My first question was, does the chorus work :) which it does. I'll keep you posted. Will still keep looking for a scope too. It's just that after a while all the searching gets old.
Guitars: Fernandes ST 40, FST 125, Fernandes TEJ LTD ED and a Vortex. Chapman ML3 Pro Modern.

ADA MP1, ENGL E530, ENGL 840/50 Power amp, Carvin X100B, 2X12 cab.

Richie_B

Hi guys, the saga continues but still haven't given up, well not completely. I've uploaded a video of the chorus/trim pot issue or what ever else it could be. It's me adjusting the trim pot to demo what I'm hearing.

https://www.youtube.com/watch?v=QUTN_Y_uRp8
Guitars: Fernandes ST 40, FST 125, Fernandes TEJ LTD ED and a Vortex. Chapman ML3 Pro Modern.

ADA MP1, ENGL E530, ENGL 840/50 Power amp, Carvin X100B, 2X12 cab.