1 Precautions
AC Voltmeter
To Exposed
To Known
Metal
Earth Ground
a.
b.
C .
e.
Use a SSVM or VOM with 1000 ohms
per-volt or higher sensitivity to measure
the
AC
voltage
drop across the resistor (see
Figure l-1).
Connect the resistor to an exposed metal
part having a return path to the chassis
(metal cabinet, screw heads, knobs, shafts,
escutcheon, etc.) and measure the AC
voltage drop across the resistor.
Any reading of 5.25 Volt RMS (this
corresponds to 3.5 milliampere AC) or
more is excessive and indicates a potential
shock hazard. Correct the shock hazard
before returning the monitor to the user.
l-l-5 Product Safety Notices
Some electrical and mechanical parts have special
safety-related characteristics which are often not
evident from visual inspection. The protection
they give may not be obtained by replacing them
with components rated for higher voltage,
wattage, etc. Parts that have special safety
characteristics are identified by
on schematics
and parts lists. A substitute replacement that does
not have the same safety characteristics as the
recommended replacement part might create
shock, fire and or other hazards. Product safety
is under review continuously and new
instructions are issued whenever appropriate.
Figure1 leakage Current Test Circuit
3.
be sure that no shock hazard exists, check
for leakage current in the following manner:
Plug the AC line cord directly into a 120
Volt AC outlet. (Do not use an isolation
transformer for this test)
Using two clip leads, connect a
ohm,
10 watt resistor paralleled by a 0.15
capacitor in series with an exposed metal
cabinet part and a known earth ground,
such as an electrical conduit or electrical
ground connected to an earth ground.
1-2
SC-726GXL
Summary of Contents for SC-726GXL
Page 9: ...2 Reference Information 2 2 Semiconductor Lead Identification 2 4 SC 726GXL ...
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Page 38: ... 1 1 I 8 Exploded View and Parts List Memo ...
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