Special Servicing Precautions; Special High Voltage Precautions - Samsung CP1395E-S Service Manual

1-2 Special Servicing Precautions

17. 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.
18. Components that are critical for safety are
indicated in the circuit diagram by shading,
or .
19. 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 measure any 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 termi-
nal of the high-voltage capacitor to the oven chassis.
3. High voltage is maintained within specified limits by
close-tolerance, safety-related components and adjust-
ments. If the high voltage exceeds the specified limits,
check each of the special components.
PRECAUTION
There exists HIGH VOLTAGE ELECTRICITY
with high current capabilities in the circuits of the
HIGH VOLTAGE TRANSFORMER secondary
and filament terminals. It is extremely dangerous
to work on or near these circuits with the oven
energized.
DO NOT measure the voltage in the high voltage
circuit including filament voltage of magnetron.
NOTE: Connect the oven to a 20A.
When connecting the oven to a 15A, make
sure that circuit breaker can operate.
Fig. 1-1 Discharging High Voltage Capacitor
Never touch any circuit wiring with your hand nor
with uninsulated tool during operation.
Servicemen should remove their watches
whenever working close to or replacing the
magnetron.
- 3 -
Short
H.V.Diode
H.V.Capacitor
PRECAUTION
PRECAUTION