X-Radiation Warning; Test Method - Kortek KTN-2001 Service Manual

KORTEK Corporation
ALSO TEST WITH PLUG
REVERSED(USING AC
ADAPTER PLUG AS
REQUIRED)
1-1-2. X-RADIATION
WARNING : The only potential source of x-radiation is the picture tube, however
when the high voltage circuitry is operating properly, there is no possibility
of an x-radiation problem. The basic precaution is to keep the high voltage
at the factory recommended level.
1) To measure the high voltage, use a high-impedance high-voltage meter.
Connect(-) to chassis and (+) to the CRT anode cap.
2) Turn the contrast control max. clockwise.
3) Measure the high voltage. The high voltage meter should indicate the following factory
recommended level
4) If the actual level exceeds the max. factory set level, then immediate service is required to
prevent the possibility of premature failure of components
5) To prevent X-RADIATION possibility, it is essential to use the specified picture tube.
6) The nominal high voltage is 24KV and not to exceed 27KV at zero beam current at rated
voltage.
KTN-2001/1401
DEVICE
UNDER
TEST ALL
TEST
EXPOSED METAL
SURFACES
2-WIRE
CORD
(TEST METHODE)
READING SHOULD
NOT BE ABOVE 0.45mA
LEAKAGE CURRENT
TESTER
EARTH
GROUND
Figurel 1
4