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7
7
.
.
C
C
O
O
M
M
M
M
O
O
N
N
B
B
R
R
E
E
A
A
K
K
D
D
O
O
W
W
N
N
O
O
F
F
M
M
I
I
C
C
R
R
O
O
W
W
A
A
V
V
E
E
O
O
V
V
E
E
N
N
A
A
N
N
D
D
M
M
E
E
A
A
N
N
S
S
O
O
F
F
R
R
E
E
P
P
A
A
I
I
R
R
I
I
N
N
G
G
PHENOMENON CAUSE REPAIRING MEANS
1. When starting the
oven, the lamp is not on,
the turntable tray can’t
rotate and the food can’t
be heated
8A fuse broken.
The primary and secondary winding of the
transformer are short – circuited.
The earthing or the polarity of the polarity of
the capacitor is punctured.
The pilot switch can’t cut off.
The interlock switch hasn’t closed.
The power plug and the socket are not in
good connection.
The door hook broken.
Change a new fuse.
Change a new transformer.
Change a new capacitor.
Change a new pilot switch.
Change a new interlock
switch.
Adjust the connection or
replace it by a new one.
Change a new hook.
2.When starting the
oven, the lamp is on, the
turntable rotating, the fan
cycling but the food can’t
be heated.
The primary and secondary winding, the
filament of the transformer are open –
circuit-ed.
The magnetron filament is open – circuited,
the magnetic steel of the magnetron broken
or the magnetron is air leaking.
Time and power distributor broken.
The plugs of the magnetron or the capacitor
loosed.
Change a new transformer.
Change the magnetron.
Change the time power
distributor or the
micro-switch.
Fix them.
3. The food can be
heated, but the lamp is
not on
The lamp broken.
The plug falls off.
Change a new lamp
Insert the plug again
4. The food can be
heated but the turntable
tray is not rotating.
The turntable motor broken
The plug fall off
Connecting shaft weave broken
Change the turntable motor
Inset the plug securely
Change the weave
5. The oven can heat
within 2-3 minutes, but
can not heat from the
fourth minutes
The winding of the fan motor in
open-circuited.
The fan falls off
The plug of the fan motor falls off
The turnatable shaft is griped with the
mo-tor bearin
The cooling vent blocked
1.Change the fan motor
2.Change the fan
3.Insert the plug
4.Overhauling them
5.Repairing it
6. When starting the
oven, it can’t heat, and
with “wenwen” noise.
The high voltage diode was punctured Change a new diode
7. The oven can heat, but
with sound “shishi” noise
The iron core of the transformer loosed Change a new transformer
8. Large amount of
microwave leakage
The door deformed
The door metal net cracked
The gap of the door crack is too large
The welding point of the oven falls off
The screws which fix the magnetron loosed
The wave guide connection oxidized
The magnetron copper filament washer is
too thin cause the wave guide opening not
in good earth.
Mend the door
Change the door
Adjust the gap
Change the oven
Tighten the screws
Scrape the oxidized and
tighten the screws
Thick the copper filament
washer