Hitachi V-355 Operation Manual page 7

Care and repair
*
Removal of stain from the case.
o
When the outside of the case is stained, remove the stain
by first wiping it lightly with a cloth moistened with
neutral washing agent and then wipe the surface with a
dry cloth.
*
Never use strongly volatile agent such as benzine and
thinner.
o
When the panel surface is stained, remove the stain in
similar way with a clean, soft cloth . When heavy stains
are pre sent, first remove the stains by wiping the surface
lightly with a locth moistened with diluted neutral wash­
ing agent or with alcohol and then wipe thoroughly with
a dry cloth.
o
When dust has accumulated on the inside, remove it by
using dry brush, or by using the exhaust of a compressor
or a vacuum cleaner.
When opening· the case, pull out the power supply
NOTE:
plug beforehand without fail.
When cleaning the inside, insure beforehand that no
4
electricity remains in the condensers of the power
supply circuit.
*
Cleaning of CRT
Dirty surface of C RT screen tends to cause measuring errors.
The screen surface becames acce ssible when the bezel is re­
moved.
Remove the stains on CRT and filter by using a clean and
soft cloth, paying attention not to impair them.
When the stain is extremely heavy, wash them with neutral
washing agent and then leave them stand until the moisture
is remove d naturally.
o
If the screen is installed while it is moistened, water
rings may be formed and the waveform may be blurred
to become hard to observe. Pay attention not to leave
finger prints on it.