. OPERATION DETAILED CONTROLS AND GAUGES Adjusting Contrast up switch (The selected monitor is inverted to black.) Alarm Buzzer Stop Switch sounding during operation to indicate an abnormality in the warning item. 3 - 33 1. When monitor ad monitor displa y screen ch anges to t he brightness/contrast s creen shown in the diagram on the right. 2. brightness/contras press down switch (10) to select t he contrast m (9) or 3. When th e screen changes to the contra st adjustment screen, press up switch ( 9) or down switch (10) to adjust th e contrast . 4. After completing adjustm ent of the contrast, press input pres input confirmation swit ch (11). Use this switch (13 he alarm buzz