Boombox open with a flat belt, that's otherwise in good condition, but stretched? Out of money? Shops closed? In a hurry? Need it playing asap?
I've tested this method and it works good enough.
What you need:
1. Stretched belt
2. -Sharp- knife/blade
3. Super glue (liquid, good quality)
4. Fine grit sandpaper (800-1200)
5. Flat smooth surface, for example a box cutter blade
6. Nerves
Start by making a rough estimate of how much the belt needs to be shortened to engage properly. Cut out the estimated amount, straight section.
Make a deep V shaped cut to one end. Duplicate it to the other end. Take your time and try to be as exact as possible.
Clean the belt with a good solvent/cleaner that leaves no residue. You can also sand the cut edges to get a bit more grit.
Now put the belt ends on a smooth surface and make sure they match. Apply evenly a small amount of super glue to the other end and carefully put the ends together on the surface, so you end up with flat as possible result.
Press the ends together with some force and hold on for some time. If the qlue sticks to the surface, use a knife to carefully carve it out.
No you should have the ends securely attached. Next thing to do is to sand out the glue from both sides so it wont make a slippery/hard section.
Once the sanding is finished and the ends are smooth, you can go ahead and test. I had to do this two times before I got it tight enough.
This method was tested on a Sony CFS-77L and the wow & flutter seemed to be just fine after the fix.
I've tested this method and it works good enough.
What you need:
1. Stretched belt
2. -Sharp- knife/blade
3. Super glue (liquid, good quality)
4. Fine grit sandpaper (800-1200)
5. Flat smooth surface, for example a box cutter blade
6. Nerves
Start by making a rough estimate of how much the belt needs to be shortened to engage properly. Cut out the estimated amount, straight section.
Make a deep V shaped cut to one end. Duplicate it to the other end. Take your time and try to be as exact as possible.
Clean the belt with a good solvent/cleaner that leaves no residue. You can also sand the cut edges to get a bit more grit.
Now put the belt ends on a smooth surface and make sure they match. Apply evenly a small amount of super glue to the other end and carefully put the ends together on the surface, so you end up with flat as possible result.
Press the ends together with some force and hold on for some time. If the qlue sticks to the surface, use a knife to carefully carve it out.
No you should have the ends securely attached. Next thing to do is to sand out the glue from both sides so it wont make a slippery/hard section.
Once the sanding is finished and the ends are smooth, you can go ahead and test. I had to do this two times before I got it tight enough.
This method was tested on a Sony CFS-77L and the wow & flutter seemed to be just fine after the fix.