Read Sharp R-8000GK Service Manual online
R-8000GK
7
It is intended to heat air driven by the convection fan. The heated
air is kept in the oven and force-circulated and reheated by the
top heating element.
air is kept in the oven and force-circulated and reheated by the
top heating element.
SIDE HEATING ELEMENT
The side heating element is located at the left side of the oven
cavity. It is intended to heat air driven by the convection fan. The
heated air is kept in the oven and force-circulated and reheated
by the top heating element.
cavity. It is intended to heat air driven by the convection fan. The
heated air is kept in the oven and force-circulated and reheated
by the top heating element.
TURNTABLE MOTOR
The turntable motor rotates the turntable located in the bottom of
the oven cavity, so that the food on the turntable is cooked evenly
during cooking. The turntable may turn in either direction.
the oven cavity, so that the food on the turntable is cooked evenly
during cooking. The turntable may turn in either direction.
FAN MOTOR (MAGNETRON SIDE)
The fan motor drives a blade which draws external cool air. This
cool air is directed through the air vents surrounding the magn-
etron and cools the magnetron. This air is channelled through the
oven cavity to remove steam and vapours given off from the
heating foods. It is then exhausted through the exhausting air
vents at the oven cavity.
cool air is directed through the air vents surrounding the magn-
etron and cools the magnetron. This air is channelled through the
oven cavity to remove steam and vapours given off from the
heating foods. It is then exhausted through the exhausting air
vents at the oven cavity.
FAN MOTOR (HIGH VOLTAGE TRANSFORMER
SIDE)
SIDE)
The fan motor drives a blade which draws external cool air. This
cool air is directed through the air vents surrounding the power
transformer and cools the power transformer. This air is chan-
nelled through the oven cavity to remove steam and vapours
given off from the heating foods. It is then exhausted through the
exhausting air vents at the oven cavity.
cool air is directed through the air vents surrounding the power
transformer and cools the power transformer. This air is chan-
nelled through the oven cavity to remove steam and vapours
given off from the heating foods. It is then exhausted through the
exhausting air vents at the oven cavity.
CONVECTION COOKING SYSTEM
This oven is designed with a hot air heating system where food is
not directly heated by the heating element, but is heated by forced
circulation of the hot air produced by the heating elements. The air
heated by the heating elements is circulated through the convec-
tion passage provided on the outer casing of the oven cavity by
means of the convection fan which is driven by the jet motor. It then
enters the inside of the oven through the vent holes provided on the
top and left sides of the oven. Next, the hot air heats the food on the
turntable and leaves the oven cavity through the vent in the centre
of the oven cavity back side wall. Without leaving the oven, this hot
air is reheated by the heating elements, passes through the
convection passage and enters the inside of the oven cavity again,
in a continuing cycle. In this way, the hot air circulates inside the
oven cavity to raise its temperature and, at the same time, comes
into contact with the food being cooked. When the temperature
inside the oven cavity reaches the selected temperature, the
heating elements are de-energized. When the temperature inside
the oven cavity drops below the selected temperature, the heating
elements are energized again. In this way, the inside of the oven
cavity is maintained at approximately the selected temperature.
When the convection time reaches 0, the heating elements are de-
energized and the convection fan stops operating and the oven
shuts off.
not directly heated by the heating element, but is heated by forced
circulation of the hot air produced by the heating elements. The air
heated by the heating elements is circulated through the convec-
tion passage provided on the outer casing of the oven cavity by
means of the convection fan which is driven by the jet motor. It then
enters the inside of the oven through the vent holes provided on the
top and left sides of the oven. Next, the hot air heats the food on the
turntable and leaves the oven cavity through the vent in the centre
of the oven cavity back side wall. Without leaving the oven, this hot
air is reheated by the heating elements, passes through the
convection passage and enters the inside of the oven cavity again,
in a continuing cycle. In this way, the hot air circulates inside the
oven cavity to raise its temperature and, at the same time, comes
into contact with the food being cooked. When the temperature
inside the oven cavity reaches the selected temperature, the
heating elements are de-energized. When the temperature inside
the oven cavity drops below the selected temperature, the heating
elements are energized again. In this way, the inside of the oven
cavity is maintained at approximately the selected temperature.
When the convection time reaches 0, the heating elements are de-
energized and the convection fan stops operating and the oven
shuts off.
Flow of hot air:
The rotation direction of the jet motor is controlled by relay RY6.
When the convection fan rotates clockwise, the hot air from the
oven cavity left side wall blows stronger than one from the oven
cavity top wall. ( This mode is called “Convection mode”.) When
the convection fan rotates counterclockwise, the hot air from the
oven cavity top wall blows stronger than one from the oven cavity
left side wall. (This mode is called “JET mode”.)
When the convection fan rotates clockwise, the hot air from the
oven cavity left side wall blows stronger than one from the oven
cavity top wall. ( This mode is called “Convection mode”.) When
the convection fan rotates counterclockwise, the hot air from the
oven cavity top wall blows stronger than one from the oven cavity
left side wall. (This mode is called “JET mode”.)
Figure D-2. Rotation direction of convection fan
Figure D-3. Flow of hot air
Side heating
element unit
element unit
Top heating
element unit
element unit
Convection
fan
fan
Convection mode
JET
mode
mode
FRONT VIEW
Hot air
Hot air
Hot air
Convection
fan
fan
Hot air
Oven cavity left side
Oven cavity
top wall
top wall
Side heating
element unit
element unit
Side heating
element unit
element unit
Top heating element unit Top heating element unit
Turntable
Convection Mode
JET Mode
TROUBLESHOOTING GUIDE
When troubleshooting the microwave oven, it is helpful to
follow the Sequence of Operation in performing the checks.
Many of the possible causes of trouble will require that a
specific test be performed. These tests are given a proce-
dure letter which will be found in the "Test Procedure
"section.
follow the Sequence of Operation in performing the checks.
Many of the possible causes of trouble will require that a
specific test be performed. These tests are given a proce-
dure letter which will be found in the "Test Procedure
"section.
IMPORTANT:
If the oven becomes inoperative because of a
blown fuse F10A in the secondary interlock
swith - monitor switch - primary interlock relay
RY2 circuit, check the monitor switch, relay
(RY1), primary interlock relay (RY2) and sec-
ondary interlock switch before replacing the
fuse F10A.
blown fuse F10A in the secondary interlock
swith - monitor switch - primary interlock relay
RY2 circuit, check the monitor switch, relay
(RY1), primary interlock relay (RY2) and sec-
ondary interlock switch before replacing the
fuse F10A.
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