7.1 Maintenance
Periodic maintenance and
inspection are
essential to maintain
the
initial perfor-
mance of
the
PLZ-U
over
an
extended period.
Awarning
Be
sure to
turn off the
POWER
switch and remove
the power
cord plug or
turn off the switchboard.
If you do not, death
or injury
may result from elec-
tric shock.
7.1.1 Cleaning
the Panels
If the
panel needs
cleaning, gently wipe using a soft cloth with water-diluted neutral
detergent.
•
Do not use volatile solvents such as thinner or benzine. They may discolor
the surface, erase printed characters, or cloud the
LCD.
7.1 .2 Cleaning
the Dust
Filter
A dust filter is installed on
the inside of the louver on the front panel. Periodically
cle^ the filter to
prevent clogging.
Clogged filters hinder the cooling of the
inside of
the instrument
and can
cause a malfunction and
shortening of the service life.
Cleaning procedure
A
Remove the louver
from the
panel. To do so,
place your
finger on the
bottom edge of
the
louver and while pressing
upward pull it toward you.
If the louver does not come off
easily, use your other hand and
pull the bottom edge of the lou-
ver toward you. This will make
the task
easier.
Fig.
7-1
Removing the louver
7-2
Maintenance PLZ-U