1. Precaution
Follow these special safety precautions. Although the microwave oven is completely safe during ordinary use, repair work can be extremely hazardous due to possible exposure to microwave radiation, as well as potentially lethal high voltages and currents.
1-1 Safety precautions ( 
)
1.All repairs should be done in accordance with the procedures described in this manual. This product complies with Federal Performance Standard 21 CFR Subchapter J (DHHS).
2.Pacemaker wearers must consult a physician before attempting to service an MWO.
8.Notify the Central Service Center if the microwave leakage exceeds 5 mw/cm2
4.Check all grounds.
5.Do not power the MWO from a
6.When reinstalling the chassis and its assemblies, be sure to restore all protective devices, including: nonmetallic control knobs and compartment covers.
7.Make sure that there are no cabinet openings through which
8.In the event of suspected microwave energy leakage in excess of 5mW/§†, please notify
J.V.SAMSUNG SERVICE LTD. MARSHAL ZHUKOU.,1.OFFICE 201 123308,MOSCOW,RUSSIA
11.If the fuse is blown by the Interlock Monitor Switch: Replace all of the following at the same time: Primary and secondary switches, as well as the Interlock Monitor Switch. The correct adjustment of these switches is described elsewhere in this manual. Make sure that the fuse has the correct rating for the particular model being repaired.
12.Design Alteration Warning:
Use exact replacement parts only, i.e., only those that are specified in the drawings and parts lists of this manual. This is especially important for the Interlock switches, described above. Never alter or add to the mechanical or electrical design of the MWO. Any design changes or additions will void the manufacturer's warranty.10.Always unplug the unit's AC power cord from the AC power source before attempting to remove or reinstall any component or assembly.
13.Never defeat any of the B+ voltage interlocks. Do not apply AC power to the unit (or any of its assemblies) unless all
14.Some semiconductor ("solid state") devices are easily damaged by static electricity. Such components are called Electrostatically Sensitive Devices (ESDs). Examples include integrated circuits and
9.Service technicians should remove their watches while repairing an MWO.
10.To avoid any possible radiation hazard, replace parts in accordance with the wiring diagram. Also, use only the exact replacements for the following parts: Primary and secondary interlock switches, interlock monitor switch.
Immediately before handling any semiconductor components or assemblies, drain the electrostatic charge from your body by touching a known earth ground.
15.Always connect a test instrument's ground lead to the instrument chassis ground before connecting the positive lead; always remove the instrument's ground lead last.
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