# B21 CR SCALE CHECK

#Overview

Check that there are no speed variations or periodic variations in the CR operation due to damage or deterioration of the CR scale surface.

#Work Procedure

1. Start the printer in the service mode.

   • Service mode startup

2. Select "B21 CR Scale Check" refer to "How to select an Adjustment item".

   • HOW TO SELECT AN ADJUSTMENT ITEM
3. The check result is displayed on the panel. If there is an abnormality, “NG” is displayed in the red frame (A). (If NG is displayed, check, clean, or replace the CR scale.)