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Model No.: MC-4200DVD
Version: 1.0
SAFETY PRECAUTIONS
Before returning a unit to the customer, always make a safety check of the entire unit,
including, but not limited to the following items:
1 Be sure that no built-in protective devices are defective and /or have been defected
during servicing.
a. Protective shields are provided to protect both the technician and the customer.
Correctly replace all missing protective shields including any removed for servicing
convenience.
b. When reinstalling the chassis and /or other assembles in the cabinet, be sure to put
back in place all protective devices, including, but not limited to, nonmetallic control
knobs, insulating fish papers adjustment and compartment covers/shields and
isolating resistor/ capacitor networks. Do not operate this or permit it to be operated
without all protective devices correctly installed and functioning.
2 Be sure that there are no cabinet openings through which an adult or child might be able
to insert their fingers and contact a hazardous voltage. Such opening include, but are
not limited to, excessively wide cabinet ventilation slot, and an improperly fitted and / or
incorrectly secured cabinet back cover.
3 Leakage current hot check – with the unit completely reassembled, plug the AC line cord
directly into a 120V AC outlet. (Do not use an isolation transformer during this test) Use
a leakage current tester or a metering system that complies with American National
standards Institute (ANSI) C 101.1” Leakage Current for Appliances” and Underwriters
Laboratories (UL) 1410 (50.7). WITH THE UNITAC switch first in the ON position and
then in the OFF position, measure from a known earth ground (metal water pipe, conduit,
etc.) To all exposed metal parts of the unit (antennas, handle bracket, metal cabinet,
screw heads, metallic overlays, control shaft, etc.) especially any exposed metal parts
that offer an electrical return path to the chassis. Any current measured must not exceed
0.5 milliamp, reverse the unit power cord plug in the outlet and repeat test. ANY
MEASUREMENTS NOT WITHIN THE LIMITS SPECIFIED HERENING INDICATE A
POTENTIAL SHOCK HAZARD THAT MUST BE ELIMINATED RETURNING THE UNIT
TO THE CUSTOMER.
