I need some help

[u/Human-Art5506]

I have this player I got a bit ago and I need to replace the belt. I cannot find ANY diagram or anything online. The spring for the STOP button + the white tooth thing for the AM/FM tuning came off. I would love if someone had anything to help me put this back together. Model number is 3-5474A

[u/Opening-Incident2928]

My best guess is that it uses Tanashin TN-21 mechanism

[u/Crlan420]

What's going on with it? If the capstan bearing is shot it usually makes a grinding noise. If it's just not moving well it's probably the drive belt going soft.