i have wm-30 sony walkman, fast forward and rewind doesn't work correctly, in fact it works a few seconds only but the tape play works correctly. So im' looking for the manual service but i don't find it; if someone know where i can find this, that's cool

i have it but the layout of parts on the servo board A and servo board B it's not the same on the wm-30, it's difficult to identify various parts

Have uploaded an e-copy to the troubleshooting wm10/20/30 post

ok thanks ; i look at this, and tell you more later