I got hold of a pretty beat up Jcm900 model 4500, and I wanna try switching the pots. Getting inside the damn thing was a bit harder than i thought at first, so if possible, I would like to order the pots before I take it apart, so it wont have to be out of business too long..
I found a schematic which gave me these pot values
http://www.marshallschematics.com/schematics/4500.zip
VR1= B220K
VR2 = A1M
VR3 = B220K )
VR4 = B22K
VR5 = A1M
VR6 = B10K
VR7 = B220K
VR8 = A1M
VR9 = B220K
VR10 A1M
Question 1. Does that look correct?
Question 2. Do I find some "marshall pots", or will any pot do, I guess what I mean is, are they mounted to anything, are only some of them mounted, which size etc.
If its no big difference in price, Ill get the Marshall replacements if that makes it easier, but if they are wired and it doesnt matter at all, Ill just get whats convenient.
Probably dumb questions, but rather ask than open it up and have it on the bench for weeks while waiting for parts.
Am I possibly overlooking something when it comes to disasembly? Might be easier than I think ?!
Gustav
I found a schematic which gave me these pot values
http://www.marshallschematics.com/schematics/4500.zip
VR1= B220K
VR2 = A1M
VR3 = B220K )
VR4 = B22K
VR5 = A1M
VR6 = B10K
VR7 = B220K
VR8 = A1M
VR9 = B220K
VR10 A1M
Question 1. Does that look correct?
Question 2. Do I find some "marshall pots", or will any pot do, I guess what I mean is, are they mounted to anything, are only some of them mounted, which size etc.
If its no big difference in price, Ill get the Marshall replacements if that makes it easier, but if they are wired and it doesnt matter at all, Ill just get whats convenient.
Probably dumb questions, but rather ask than open it up and have it on the bench for weeks while waiting for parts.
Am I possibly overlooking something when it comes to disasembly? Might be easier than I think ?!
Gustav