LG LTM9000B, Service Manual

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D. MEASUREMENT WITH A FULLY ASSEMBLED OVEN
(1) After all components, including the outer panels, are
fully assembled, measure for microwave energy
leakage around the door viewing window, the exhaust
opening and air inlet openings.
(2) Microwave energy leakage must not exceed the values
prescribed below.
NOTES:
Leakage with the outer panels removed - less than
5mW/cm.sq. Leakage for a fully assembled oven
(Before the latch switch (primary) is interrupted) with the
door in a slightly opened position - less than
1 mW/cm .sq.
E. NOTE WHEN MEASURING
(1) Do not exceed meter full scale deflection.
(2) The test probe must be removed no faster than 1
inch/sec (2.5cm/sec) along the shaded area, otherwise
a false reading may result.
(3) The test probe must be held with the grip portion of the
handle. A false reading may result if the operator’s
hand is between the handle and the probe.
(4) When testing near a corner of the door, keep the probe
perpendicular to the surface making sure the probe
horizontally along the oven surface, this may possibly
cause probe damage.
F. RECORD KEEPING AND NOTIFICATION AFTER
MEASUREMENT
(1) 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.
(2) Should the microwave energy leakage not be more
than 1mW/cm.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.
(3) At least once a year, have the electromagnetic energy
leakage monitor checked for calibration by its
manufacturer.
G. POWER OUTPUT MEASUREMENT
(1) Fill the test beaker with 59 ˚F(15 ˚C) ~ 75 ˚F(24 ˚C) 1 liter tap
water.
(2) Stir the water in the beaker with thermometer ( ˚F or ˚C) and
measure temperature as T1.
(3) Place the beaker on the center of turntable.
(4) Set for one (1) minute and three (3) seconds and operate
the oven at high power.
NOTE: The additional three (3) seconds is to allow the
magnetron to begin generating power.
(5) When the heating is finished, stir the water again with
thermometer and measure the temperature of water as T2.
(6) Subtract T1 from T2, this will give you the temperature rise.
(7) The microwave power output is within specification, if the
temperature rise is as shown below:
Temperature Rise
Line Voltage Degrees ˚F Degrees ˚C
120 V 17.1 ~ 22.5 9.5 ~ 12.5
108 V Min. 12.6 Min 7.0
(8) Power output will be influenced by line voltage of power
supply. Consequently, correct power output must be
measured within 120V AC ± 1 Volt while unit is operating.
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SPECIAL TIP
• This oven used the button head screws.
• When you remove the screws, using the
tamper-resistant Torx driver have a
pin-in-head.
Button Head
(Torx style 2)