So I just recently got a Sony WM-EX631 Cassette Walkman from eBay. Its been pretty good the first month, had to replace the cassette door on the transparent case but other than that fine. Now, it seems there is an issue with the autostop/autoreverse function. The cassette was intermittently reversing to the opposite side at random, like in the middle of a song. Once I changed the mode to not reverse, now it just stops as soon as I hit play even mid tape. I’m wondering if the mechanism for detecting auto reversing needs attention. From what I’ve gathered they use some sort of transducers on a reflective gear to accomplish this. Is that information correct? If anyone knows anything I’d appreciate it.
Thank you for all of your advice. The mechanism seems to be more or less the same with this unit. When I get home tonight I’ll take a look at the springs on the rollers. The design of this unit means I gotta take it completely apart to get to them but it will be worth it.