Sharp FO-77 Service Manual page 78

FO-77U
UX-66U
3. Shading paper
The white and black basis is applied to remember the shading wave-
form. Be sure to perform this operation when replacing the battery or
replacing the control PWB. Execute in the shading mode of DIAG mode.
UX-108 SERIES SHADING WAVE MEMORY STANDARD PAPER (PSHEZ3354SCZZ)
8 – 3