Matsutec HP-33A, Operator'S Manual

Page: 82 / 98

9
. MAINTENANCE, TROUBLE-
SHOOTING
9
.1 Maintenance
Regular maintenance is important to maintain performance. Check the following
points to help maintain performance.
• Check that connectors on the rear panel are firmly tightened and free of rust.
• Check that the ground system is free of rust and the ground wire is tightly fastened.
• Check that battery terminals are clean and free of rust.
• Dust or dirt may be removed from the cabinet with soft cloth. Water-diluted mild de-
tergent may be used if desired. DO NOT use chemical cleaners to clean the display
unit; they may remove paint and markings.
• Wipe the LCD carefully to prevent scratching, using tissue paper and an LCD clean-
er. To remove dirt or salt deposits, use an LCD cleaner, wiping slowly with tissue
paper so as to dissolve the dirt or salt. Change paper frequently so the salt or dirt
will not scratch the LCD. Do not use solvents such as thinner, acetone or benzene
for cleaning. Also, do not use degreaser or antifog solution, as they can strip the
coating from the LCD.
Life of LCD
The life of the LCD is approximately 50,000 hours. The actual number of hours de-
pends on ambient temperature and humidity. When the brilliance cannot be raised suf-
ficiently, ask your dealer about replacement.
9-1