2
1. Parts that have special safety characteristics are identified by the symbol on schematics or
by special notes on the parts list. Use only replacement parts that have critical characteristics recom-
mended by the manufacturer.
2. Make leakage current or resistance measurements to determine that exposed parts are acceptably
insulated from the supply circuit before returning the unit to the customer.
Use the following checks to perform these measurements:
A. 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) C101.1
“Leakage Current for Appliances” and Underwriters Laboratories (UL) 6500/60065 / IEC 60065 para-
graph 9.1.1. With the unit AC switch first in the ON position and then in OFF position, measure from a
known earth ground (metal waterpipe, conduit, etc.) to all exposed metal parts of the unit (antennas,
handle bracket, metal cabinet, screwheads, metallic overlays, control shafts, 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 MEASURE-
MENTS NOT WITHIN THE LIMITS SPECIFIED HEREIN INDICATE A POTENTIAL SHOCK HAZARD
THAT MUST BE ELIMINATED BEFORE RETURNING THE UNIT TO THE CUSTOMER.
B. Insulation Resistance Test Cold Check-(1) Unplug the power supply and connect a jumper wire
between the two prongs of the plug. (2) Turn on the power switch of the unit. (3) Measure the resis-
tance with an ohmmeter between the jumpered AC plug and each exposed metallic cabinet part on
the unit. When testing 3 wire products, the resistance measured to the product enclosure should be
between 2 and infinite MOhms. Also, the resistance measured to exposed input/output connectors
should be between 4 and infinite MOhms. When testing 2 wire products, the resistance measured to
exposed input/output connectors should be between 4 and infinite MOhms. If it is not within the limits
specified, there is the possibility of a shock hazard, and the unit must be repaired and rechecked
before it is returned to the customer.
ELECTROSTATIC DISCHARGE SENSITIVE (ESDS) DEVICE HANDLING
This unit contains ESDS devices. We recommend the following precautions when repairing,
replacing or transporting ESDS devices:
• Perform work at an electrically grounded work station.
• Wear wrist straps that connect to the station or heel straps that connect to conductive floor mats.
• Avoid touching the leads or contacts of ESDS devices or PC boards even if properly grounded.
Handle boards by the edges only.
• Transport or store ESDS devices in ESD protective bags, bins, or totes. Do not insert unprotected
devices into materials such as plastic, polystyrene foam, clear plastic bags, bubble wrap or plastic
trays.
SAFETY INFORMATION
(2 pages)
(1 pages)
(144 pages)
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