Yokogawa Button Operated MV2000 - Manual (Page 259)

12-20 M-4660
12.3 Periodic Inspection
Check the operation periodically to keep the MV in good working order.
Perform the following checks and replace worn parts as needed.
• Is the display and storage functioning properly?
If not, see section 12.2, “Troubleshooting.”
• Has the brightness of the LCD backlight deteriorated?
If replacement is necessary, see section 12.5, “Recommended Replacement Periods
for Worn Parts.”