Table of Contents
Advertisement
measurements.
6. The potential at any point should not exceed 0.75 V RMS.
A leakage current tester (Simpson Model 229 equivalent) may be
used to make the hot checks. Leakage current must not exceed 1/
2 mA. In case a measurement is outside of the limits specified,
there is a possibility of shock hazard, and the receiver should be
repaired and rechecked before it is returned to the customer.
2. X-RADIATION
WARNING :
1. The potential source of X-Radiation in TV sets is the High Voltage
section and the picture tube.
2. When using a picture tube test fixture for service, ensure that the
fixture is capable of handling 25.0 kV (For model with 13 inch
CRT) or 30.0 kV (For model with 20 inch CRT) without causing X-
Radiation.
NOTE :
It is important to use an accurate periodically calibrated high
voltage meter.
1. Reduce the brightness to minimum.
2. Set the SERVICE switch to SERVICE .
3. Measure the High Voltage. The meter reading should indicate 23.5
kV±1.5 kV (For model with 13 inch CRT) or 28.5 kV±1.5 kV (For
model with 20 inch CRT).
If the meter indication is out of tolerance, immediate service and
correction is required to prevent the possibility of premature
component failure.
Figure 1
5
Advertisement
Table of Contents
