Thanks for your answer!
The reels really rub the deck and a few screws attached to the deck. Had to remove them...!
I'll open it and check it out.
Or take it to professionals to check it out..
Another problem. The front panel won't come off. I've loosen every screw, tape guides, pinch roller and knobs.
I'm afraid to broke it if I pull too hard.
The head cover has to come off first.
It helps if you remove the back cover and top bonnet.
There is a nut on the pitch control knob that needs to be removed with needlenose pliers.
The top of the front panel hooks a bit under the top bonnet.
There are also screws for the front panel on the bottom/front.