[djski]

Seen it before. You will need to access the take up side slider assembly from underneath. Its mechanism is either binding or a cam gear driving the loading sliders is damaged. I would bet when the take up side slider snaps into place, it's not tightly against its stopper, affecting the RF envelope.The supply tension band could also be worn. There's too much tape slack on the supply side. I can't tell from the view if the supply tension arm is swinging out towards the inetia roller by the full erase head. You may want to verify that.