jcm 900 2100 problem!

ardec2 · Posted: Thu Aug 09, 2007 6:09 am Post subject: jcm 900 2100 problem!

just bought this at a pawn cheap,... plugged it in set at hi, and 16ohm into a 1-12 16 ohm cab speaker connection,(a marshall jcm 800 50w combo)

it sounded fine for about 10-15 secs, then I smelled lots of heat burning not really smoke, just heat & burning smells, shut it off and noticed 1) the volume was gone,. disappeared as smell and heat increased, 2) two tubes were total red hot hot hot (not normal glow),..

should i try new tubes? did i hook up wrong??? any ideas?

thanks robert

jeff in west va · Not So Newbie Joined: 21 Aug 2007 Posts: 6

i have no idea...but if you have little in it you may be better off to pay a pro to look at it. because if you "fix" it wrong it may ruin it!

ardec2 · Posted: Thu Aug 23, 2007 6:05 am Post subject:

if you have "no idea", then why a comment,... ? no ideas just opinions sounds silly

MikeM · Posted: Mon Sep 10, 2007 5:53 pm Post subject:

Sounds like a shorted power tube.

Check your fuse(s)! Make sure someone hasn't done the ol aluminum foil trick.

Nsureit · Posted: Sat Sep 15, 2007 1:08 pm Post subject:

Hey, Ardec2, Jeff's advice was excellent. If you got it cheap, invest a little more and get a qualified Marshall repairman to check it out! It could be a simple problem that only a pro would find, then you might have a super cool rig for 10-20 more years.