http://richardhaw.com/2017/05/13/repair-nikon-sps3s4f-shutter-speed-calibration/
This article is more for your entertainment or education than an actual repair manual as the proper way to fix this is much more complicated than what is shown here and involves taking the camera apart to access the drums,etc.
Remember, do not do this yourself as the proper way to do this requires a real professional with real equipment and experience. This is made more for your entertainment and for added information in case somebody tries to con you by saying they fixed your camera when in fact they didn't!
This article is more for your entertainment or education than an actual repair manual as the proper way to fix this is much more complicated than what is shown here and involves taking the camera apart to access the drums,etc.
Remember, do not do this yourself as the proper way to do this requires a real professional with real equipment and experience. This is made more for your entertainment and for added information in case somebody tries to con you by saying they fixed your camera when in fact they didn't!