Special High Voltage Precautions - Samsung CK135 Service Manual

Pretaution
1-2 Special Servicing Precautions (Continued)
17. 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.
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 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.
PRECAUTION PRECAUTION PRECAUTION PRECAUTION
There exists HIGH VOLTAGE ELECTRICITY with high There exists HIGH VOLTAGE ELECTRICITY with high There exists HIGH VOLTAGE ELECTRICITY with high There exists HIGH VOLTAGE ELECTRICITY with high
current capabilities in the circuits of the HIGH VOLTAGE current capabilities in the circuits of the HIGH VOLTAGE current capabilities in the circuits of the HIGH VOLTAGE current capabilities in the circuits of the HIGH VOLTAGE
TRANSFORMER secondary and filament terminals. It is TRANSFORMER secondary and filament terminals. It is TRANSFORMER secondary and filament terminals. It is TRANSFORMER secondary and filament terminals. It is
extremely dangerous to work on or near these circuits extremely dangerous to work on or near these circuits extremely dangerous to work on or near these circuits extremely dangerous to work on or near these circuits
with the oven energized. with the oven energized. with the oven energized. with the oven energized.
DO NOT measure the voltage in the high voltage circuit DO NOT measure the voltage in the high voltage circuit DO NOT measure the voltage in the high voltage circuit DO NOT measure the voltage in the high voltage circuit
including filament voltage of magnetron. including filament voltage of magnetron. including filament voltage of magnetron. including filament voltage of magnetron.
H. V. Capacitor
Touch chassis ground first then short to the high
voltage capacitor terminal by using screwdriver or
jumper wire.
Fig. 1-1. Discharging the High Voltage Capacitor Fig. 1-1. Discharging the High Voltage Capacitor Fig. 1-1. Discharging the High Voltage Capacitor Fig. 1-1. Discharging the High Voltage Capacitor
Never touch any circuit wiring with your hand nor with Never touch any circuit wiring with your hand nor with Never touch any circuit wiring with your hand nor with Never touch any circuit wiring with your hand nor with
uninsulated tool during operation. uninsulated tool during operation. uninsulated tool during operation. uninsulated tool during operation.
Servicemen should remove their watches whenever Servicemen should remove their watches whenever Servicemen should remove their watches whenever Servicemen should remove their watches whenever
working close to or replacing the magnetron. working close to or replacing the magnetron. working close to or replacing the magnetron. working close to or replacing the magnetron.
- 3 -
H. V. Diode
Short
PRECAUTION PRECAUTION PRECAUTION PRECAUTION
PRECAUTION PRECAUTION PRECAUTION PRECAUTION