impedance high voltage meter. (SENSITIVE RESEARCH MODEL: ESH
or
Equivalent).
Connect (-)to chassis earth and (+)to the CRT anode button.
NOTE:
Make
sure to turn power switch
making
the connection to the Anode Button.
X-RADIATION
TUBE:
The
primary source of X-radiation in this monitor is the picture tube. The tube utilized
in this chassis is specially constructed to limited X-radiation emissions. For continued X-radiation
protection, the replacement tube must be the same
type
as the original, manufacturer approved
type.
When trouble shooting and making test measurements in a monitor with a problem of excessive
high voltage, avoid being unnecessary close to the picture tube and the high voltage components.
Do not operate the chassis longer than is necessary to locate the cause of excessive voltage.
PRODUCT SAFETY
NOTICE
Many electrical and mechanical
parts
in
the color monitor units have special safety related
characteristics. These are often not evident from visual inspection nor can
the
protection
afforded by them necessarily be obtained by
using
replacement components rated for high
voltage, wattage, etc. Replacement parts that have these special safety characteristics are
identified in this Service Manual. Electrical components having such feature are identified by
marking with
"!"
on the schematics and on the parts list in this Service Manual.
The
use of
a substitute replacement component which does not
have
same safety characteristics
as
the manufacturer recommended replacement one, shown in the parts list in this Service
Manual, may create shock, fire, X-radiation, or other hazards. Product Safety is continuously
under review and new instructions are issued from time to time. For the latest information,
always consult this Service Manual.
2.
INTRODUCTION
This service manual gives information about the NT-43
lHRfNT-1438/NT-I448/NT-931HR
NT-1938NT-1948 color display monitors. These color monitors accept TTL and ANALOG
inputs for
R.G.B.;
they feature stable convergence, easy maintenance and compact styling.
2
