Help on sonic frontier sf line 1 preamp

[mgm31]

Hi,

A friend, by mistake, touched the 2 variable resistor (see picture, on orange circle).

I'm a bit afraid to use as this the preamplifier, I don't know the impact of this mistake.

Does anyone can advice me how to have the proper setting for this (or a service manual / schematic) ?

Thanks a lot.

 

[dshortt9]

Sorry, I was going to answer this and forgot.
Chris Johnson at Parts Connexion can help with whatever you need. See the bottom of this page.
http://www.partsconnexion.com/t/Index/SF_repairs-mods.html