Carlsbro Glx documentation - pre amp problem

[tedsorvino1]

Hi. Apart from my tube amp, I'm also using a Carlsbro Glx 80 for about 20 years now.
It's well maintained but suddenly the preamp section on both channels went really weak (I checked the other sections - power amp in, effect send- and they work fine) .
I can't figure out what could have gone wrong since all the mechanical parts work ok....Leads, pots, etc. .
I 'm not sure how it is constructed so I'm looking for any relevant or specific documentation (service maual, schematics etc.) of any model of the Carlsbro GLX series- especially something close to this one.
Thanks in advance

[PRR]

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[pompeiisneaks]

Sadly your post on http://music-electronics-forum.com/t46186/ is the only thing I can find :P googling

~Phil

[tedsorvino1]

Thanks both of you. Unfortunatelly PRR the schematics are not similar at all. Mine is a very different much older model.
Yes pompeiisneaks, I'm trying hard to find relevant info.