HP 815MFP - Manual (Page 32)

26 hp designjet 815mfp & scanner 4200
The white scanning area background platen is on the backside
of the pressure platen you removed.
7. Turn the pressure platen, which was removed in step 4, upside
down.
8. Clean the white platen.
Caution: do not use abrasives, acetone, benzene or fluids that
contain these chemicals.
Wipe the white metal area with a lint-free cloth and a mild,
streak-free, glass cleaner.
9. Clean the platen rollers.
Caution: do not use abrasives, acetone, benzene or fluids that
contain these chemicals.
Wipe the rollers with a lint-free cloth and a mild, streak-free,
glass cleaner.