Measurements And Adjustments - Panasonic NE-3280 Service Manual

NE-3280 / NE-3240 / NE-2180 / NE-2140

16 MEASUREMENTS AND ADJUSTMENTS

16.1. Adjustment of the safety
switch B (Right and Left side)
1. Switch operation
When the door is slightly opened, the safety switch B opens
the main circuit. The movement of the door from the closed
position to the operation position (shown as lier) of the
switch when it opens the main circuit, must maintain within
following tolerances.
SAFETY SWITCH B (liter) = 3 mm — 5mm
(When safety switch B opens the main circuit)
NOTE
Make sure that safety switch A turns off prior to the
safety switch B when the door is gradually opened.
2. How to adjust safety switch B
Loosen 2 screws which secure the safety switch B bracket
to the bracket of the oven assembly and then adjust the
safety switch B bracket by moving it to either direction as
shown in figure.
16.2. Adjustment of the Short
Switch (Right and Left side)
1. When the door is slightly opened, the Short Switch opens
the main circuit and closes the contacts for short circuit. The
movement of door from its closed position to open position
at which the Short Switch contacts open the main circuit
(shown as liter) must maintain within 8mm — 11mm and at
which the switch contacts close the short circuit should be
20mm — 35mm.
2. How to adjust
Loosen the 2 screws holding the short switch to the short
switch bracket, and then adjust the safety switch A by
moving it to either direction as shown in figure.
16.3. Adjustment of the safety
switch A (Door switch) (Right
and Left side)
1. Switch operation
When the door is slightly opened, the contacts of safety
switch A opened to give digital programmer circuit the
information that the door is opened. The allowable
movement of the door from the closed position to the
operating position (shown as liter) of the switch when it
opens the circuit, is specified as follows;
SAFETY SWITCH A (liter) = 1mm — 3mm
(When safety switch A opens the circuit)
NOTE
Make sure that safety switch A turn off prior to the
safety switch B when the door is gradually opened.
2. How to adjust safety switch A
Loosen 2 screws which secure the safety switch A bracket
to the bracket of the oven assembly and then adjust the
safety switch A bracket by moving it to either direction as
shown in figure.
16.4. Measurement of microwave
output
The output power of the magnetron can be determined by
performing IEC standard test procedures. However, it is
possible to test the magnetron by following procedure outlined
below.Necessary equipment:
· 1 litre beaker
· Glass thermometer
· Wrist watch or stopwatch
NOTE
Check the line voltage under load to ensure it meets
specifications. Low voltage condition will cause a
reduction in magnetron output. Temperature readings
and heating time, should be as accurate as possible.
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