Roland MA-12C Repair Help
Posted by Wolf_13@reddit | retrobattlestations | View on Reddit | 6 comments
I was lucky enough to grab a pair of MA-12C's cheap, the issue it seems is the speaker has snapped clean off the face-plate, plastic screw in mould and all.
It looks like someone has attempted to repair previously, unsuccessfully.
Can anyone provide any advice on how I'd re-attach the speaker to the faceplate again?
Is my best bet- removing the plastic screw-moulds, and trying to re-attach them to the plastic with some type of stronger bonding?
Any help appreciated,
nyurons@reddit
I am trying to solve the same exact problem on my MA-12C. Did acetone work for you? It did not seem to work for me. Since the previous epoxy (or superglue?) work did not prove to be strong and it’s acetone resistant, my research suggests that the enclosure material is a low-surface-energy plastic like polypropylene. This type of plastic requires a special glue. I am going to try Loctite Plastic Bond with the primer, but there may be better alternatives. I will report back with my result.
nyurons@reddit
The Loctite Plastic Bond with primer seems to be holding the plastic nicely. I made sure to use sparingly to minimize spillage into the screw hole.
nyurons@reddit
I am trying to solve the same exact problem on my MA-12C. Did acetone work for you? It did not seem to work for me. Since the previous epoxy work did not prove to be strong and it’s acetone resistant, my research suggests that the enclosure material is a low-surface-energy plastic like polypropylene. This type of plastic requires a special glue. I am going to try Loctite Plastic Bond with the primer, but there may be better alternatives. I will report back with my result.
tyttuutface@reddit
Try two-part epoxy. Make sure to line up the screw posts as they originally were and apply some light clamping force while it dries. Not too much, a couple of rubber bands or a bit of weight on the speaker will do.
pmodizzle@reddit
I have standoffs broken off mine too, seems to be an age related issue. Agree with the other post that acetone would probably work to form a strong bond.
FozzTexx@reddit
The case is most likely ABS, which can be easily solvent welded using acetone. If the previous repair used superglue/cyanoacrylate then the acetone will also wash that off to make a good bond. If some other glue was used then you may have to lightly sand it off.