I honestly know better but didn't do it: didn't take photos as I tore into my K-chassis Panasonic. (Mine is AG-5710, vanishingly similar to AG-1980)
All I have left for reassembly is top/bottom cover and the two layers of front panel (Front Panel, Sub-Front Panel)
The four screws for the top are easy.
The other three:
* Seven (eight in my case) screws for the bottom panel
* One screw top-center for the front panel
* Four screws (left/right/2 center) for the front sub-panel
I have 9 brass screws, 2 large red, 2 small red. I don't want to mess anything up.
My guess: brass are for the bottom and top-center of front panel
But the four red... not obvious which holes take large and small.
Anybody simply know?
-- merged --
Solved it.
* Center of sub-front uses the two larger red screws
* Outer sub-front uses the two smaller red screws
* Top-center of Front, and bottom panel, use the rest
* (AG-5710 has an 8th bottom screw, center-back of the panel)