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procedures described in this manual before the oven is release to the owner.
E) A microwave leakage check to verify compliance with the Federal performance standard
should be performed on each oven prior to release to the owner.
SAFETY PRECAUTION
Follow the special safety precautions, although microwave oven is completely safe when in
use. Repair work will be extremely hazardous to possible exposure to microwave radiation, as
well as potentially the high voltage and currents.
1. All serving should be done in comply with procedure described in this manual.
2. Microwave emission checks should be performed prior to serving if the oven is operative.
3. If the oven operates with door open, tell the user not to operate the oven and contact the
manufacturer and the centre for device and radiological health immediately.
4. Inform the manufacturer or importer when the oven emits micro leakage more than 5mA /cm2.
And tell the user the oven should not be used until it has been repaired.
5. Check the groundings.
6. Do not remove microwave oven from a prong AC cord. Be sure that all of the built-in
protect devices are replaced. Restore any missing protect facility.
7. When reinstalling the chassis and its assembly make sure that all protective facilities are in
place, including: nonmetallic control knobs and compartment covers.
8. Make sure that there are no cabinet opening through which people -particularly -children
-might insert object and contact dangerous voltage.
9. Service technician should remove their watches while repairing an microwave oven.
10. To avoid any possible radiation hazard, replace parts in accordance with the wiring
diagram. Also use only the exact replacement for the following parts: Primary and secondary
interlock switches, interlock monitor switch.
11. If the fuse is blown by the interlock switch, replace all of the following at the same time:
Primary, door switch and power relay. As well as the interlock switch as described in other
section of the manual.
12. Design alteration warning: When replace the critical component, select the component that
specified in list in the section of manual. Never attempt to change mechanical or electrical
design of MWO. Always disconnect the power source before disassembling or putting on
component.
13. Some semiconductor devices are easily damaged by static electricity. So touching a known
earth ground before you handling any semiconductor components or assemblies.
14. Always connect a test instrument ground lead to the instrument chassis ground before
connecting the positive lead; always remove the instrument ground lead at last.
15. When checking the continuity of the switches or transformer, always make sure that the
power is OFF. And one of the lead wires is disconnected.
