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1. Precautions
Follow these safety, servicing and ESD precautions to prevent
damage and protect against potential
hazards, such as electrical shock and X-rays.
1-1. Safety Precautions
1. Be sure that all of the built-in protective devices are replaced.
Restore any missing protective shields.
2. When reinstalling the chassis and its assemblies, be sure to restore all protective devices,
including nonmetallic control knobs and compartment covers.
3. Make sure that there are no cabinet openings through which people-particularly children-might
insert fingers and contact dangerous voltages. Such opening include the spacing between
the picture tube and the cabinet mask, excessively wide cabinet ventilation slots, and impro-
perly fitted back covers.
If the measured resistance is less than 1.0 megohm or greater than 5.2 megohms, an
abnormality exists that must be corrected before the unit is returned to the customer.
4. Leakage Current Hot Check (Figure 1-1)
Warning Do not use an isolation transformer during this test. Use a leakage current
tester or a metering system that complies with International Electrotechnical Commission
65.(IEC 65)
ALSO TEST WITH
PLUG REVERSED
DEVICE
UNDER
POWER
TEST
CORD
READING SHOULD NOT
BE ABOVE
<0.7mA PEAK AC<2mA DC.
TEST ALL
EXPOSED METAL
SURFACES
EARTH
GROUND
3
LEAKAGE
CURRENT
TESTER
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