User Manual Chef'sChoice 0101500 Trizor XV EdgeSelect Professional Electric Knife Sharpener

No you can not. After confirming my unit was out of warranty ( more than one year) customer service told me the company is not accepting units for repairs/replacement parts 'due to Covid..'.
BTW, they won't send you new discs to replace yourself since they don't send out any internal parts for customers.

However, realize the blade is so short, the wheel won't start at the hilt. No biggie. Also you are changing the angle of the grind, so you won't be done in a few passes. It's going to take a few minutes and some material.