Samsung CE745GR service manual Special Servicing Precautions, Special High Voltage Precautions

Pretaution

1-2 Special Servicing Precautions (Continued)

16.When checking the continuity of the witches or transformer, always make sure that the power is OFF, and one of the lead wires is disconnected.

17.Components that are critical for safety are indicated in the circuit diagram by

shading, or .

18.Use replacement components that have the same ratings, especially for flame resistance and dielectric strength specifications. A replacement part that does not have the same safety characteristics as the original might create shock, fire or other hazards.

1-3 Special High Voltage Precautions

1.High Voltage Warning

Do not attempt to measureany of the high voltages--this includes the filament voltage of the magnetron. High voltage is present during any cook cycle.

Before touching any components or wiring, always unplug the oven and discharge the high voltage capacitor (See Figure 1-1)

2.The high-voltage capacitor remains charged about 30 seconds after disconnection. Short the negative terminal of the high-voltage capacitor to the oven chassis. (Use a screwdriver.)

3.High voltage is maintained within specified limits by close-tolerance, safety-related components and adjustments. If the high voltage exceeds the specified limits, check each of the special components.

Fig. 1-1. Discharging the High Voltage Capacitor

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