LG LMC1575BD Service Manual page 14

MEASUREMENT WITH OUTER CASE REMOVED
• When you replace the magnetron, measure for microwave energy leakage
before the outer case is installed and after all necessary components are
replaced or adjusted.
Special care should be taken in measuring the following parts. (Circled area of
Fig. below)
- Around the magnetron
- The waveguide
WARNING : AVOID CONTACTING ANY HIGH VOLTAGE PARTS
MEASUREMENT WITH A FULLY ASSEMBLED OVEN
• After all components, including the outer case, are fully assembled, measure for
microwave energy leakage around the door viewing window, the exhaust
opening, and air inlet openings.
• Microwave energy leakage must not exceed the values prescribed below.
NOTE: Leakage with the outer case removed less than 5 mW/cm
for a fully assembled oven (Before the latch switch (primary) is
interrupted) with the door in a slightly opened position-less than 2 mW/
cm .sq.
2
NOTES WHEN MEASURING
• Do not exceed meter full scale deflection.
• The test probe must be moved no faster than
1 inch/sec (2.5 cm/sec) along the shaded area, otherwise a false reading may
result.
• The test probe must be held by the grip portion of the handle.
A false reading may result if the operator's hand is between the handle and the
probe.
• When testing near a corner of the door, keep the probe perpendicular to the
surface making sure the probe is moved horizontally along the oven surface.
Hold vertically when testing the top and bottom, and horizontally along.
RECORD KEEPING AND NOTIFICATION AFTER
MEASUREMENT
• After adjustment and repair of any microwave energy interruption or microwave
energy blocking device, record the measured values for future reference. Also
enter the information on the service invoice.
• The microwave energy leakage should not be more than 5 mW/cm2.sq. after
determining that all parts are in good condition, functioning properly and genuine
replacement parts which are listed in this manual have been used.
• At least once a year, have the electromagnetic energy leakage monitor checked
for calibration by its manufacturer.
.sq. Leakage
2
5-2