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Tools and Measuring Instruments
NECESSARY TOOLS
Tools normally used for TV servicing are sufficient.
Standard tools are listed below.
• Diagonal pliers
• Long nose pliers
• Cross head screwdriver
• Wrench (size 5 mm)
• Nutdriver (size 5 mm)
• Adjustable wrench
• Soldering iron
• Solder
• Vinyl insulation taper
• Polishing cloth
Microwave Leakage Test
CAUTIONS
• Be sure to check a microwave emission prior to
servicing the oven if the oven is operative prior to
servicing.
• If the oven operates with door open, the service
personnel should;
—Tell the user not to operate the oven
• The service personnel should check all surface and
vent openings for microwave emission testing.
• Check for microwave energy leakage after every
servicing. The power density of the microwave
radiation leakage emitted by the microwave oven
should not exceed 4 mW/cm
And always start measuring of an unknown field to
assure safety for operating personnel from radiation
leakage.
NOTE: The standard is 5 mW/cm
customer's home. 4 mW/cm
manufacturer's own voluntary standard for units in
customer's home.
EQUIPMENT
• Microwave Survey Meter
• 600cc glass beaker
• Glass thermometer 100°C
SERVICE INFORMATION
2
.
2
while in the
2
stated here is
NECESSARY MEASURING
INSTRUMENTS
• TESTER (VOLTS-DC, AC, Multmeter)
• Microwave survey meter
—Holaday H1-1500, Hi-1501
—Narda 8100, 8200
• Inch scale
• 600 cc non conductive material beaker (glass or
plastic), inside diameter: approx. 8.5cm (3
• Cylindrical and made of borosilicate glass vessel max.
thickness: 3 mm
outside diameter: approx. 190mm
height: approx. 90mm
• Glass thermometer: 100°C or 212°F (1 deg scale)
MEASURING MICROWAVE ENERGY
LEAKAGE
• Pour 275 ± 15cc of 20°C ± 5°C water in a beaker which
is graduated to 600 cc, and place the beaker on the
center of the turntable.
• Set the energy leakage monitor to 2450 MHz and use
it following the manufacturer's recommended test
procedure to assure correct result.
• When measuring the leakage, always use the 2 inch
(5cm) spacer supplied with the probe.
• Operate the oven at its maximum output.
• Measure the microwave radiation using and
electromagnetic radiation monitor by holding the probe
perpendicular to the surface being measured
Move probe along shaded area
Probe scanning speed
Less than 2.5 cm/sec
5-1
1 /2
in.)
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