6 – 4
6.2
6
Fig. 6.3 Carbon Brush
6.2.2 Display Unit NCD-3780
Cleaning of CRT Surface
Dusts accumulated on the CRT surface will reduce clarity and darken pictures.
For cleaning, wipe it with a soft cloth (flannel or cotton) wetted with water. Do not wipe it strongly with a
dry cloth nor use gasoline or thinner.
CAUTION
When cleaning the CRT, do not wipe it strongly with a dry cloth nor use gasoline or
thinner, otherwise it will be damaged or deteriorated.
Spring
Carbon brush
Contact surface
with commutator
Notch
(replace it when it has worn
to this point
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