Sanyo EM-U1000W - Compact Microwave,10 Pwr Lvls,800 W,18"x14-3/8"x11-5/8",WE Service Manual page 18
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- Instruction manual and cooking manual (21 pages) ,
- Instruction manual and cooking manual (20 pages) ,
- Instruction manual and cooking manual (21 pages)
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speed of the probe should not exceed 25mm per second, and
the measuring direction should be the same with the outing
direction of the probe should not exceed 25mm per second, and
the measuring direction should be the same with the outing
direction of the microwave leakage (FIG.5 - 2)..
When measuring the ultimate value of microwave leakage of all
the measure position should not exceed 1 milliwatt/cm2, of
should be considered as abnormal.
1
1
.
.
1
1
7
7
.
.
4
4
E
E
X
X
A
A
M
M
I
I
N
N
E
E
W
W
H
H
E
E
F
O
O
D
C
A
N
'
T
B
F
O
O
D
C
A
N
'
T
B
(1) Examine when the lamp is on, the glass tray is cycling, the
fan operating in normal:
Take off the cabinet, starting the oven, measure the plug of the
transformer with an multimeter to see whether it is enough to
120V. If it is enough to 120V, then the secondary high voltage of
the transformer should be examined as FIG.5 – 3.
Measure it with the 2500V-alternating grade of model 500
multimeter. One rod of the multimeter connects the iron core of
the transformer, the other rod connects the secondary high
voltage plug (FIG.5 - 4). The multimeter reading should be about
2100V (when measure, be careful with the high voltage). If no
voltage at all, it indicates that the transformer has broken, and
should be replaced by a new one. If it is enough to 2100V, then
check the filament voltage of the transformer with alternating
10V grade of an multimeter, the value should be about 3.4V
(FIG.5 - 5).
If there is no voltage at all, it indicates the transformer has
broken, and should be replaced by a new one. If it is enough to
3.4V, check the filament resistance of the magnetron, measure
the filament plug with the R×1 grade of a multimeter (FIG.5 - 6).
If it is open – circuited, it indicates the magnetron has broken,
and should be replaced by a new one. It is normal if the
resistance very small. Then check whether the magnetron steel
has broken, if broken, replace with a new magnetron.
If there is no problem with the magnetron, check the high voltage diode then. Measure the diode with R×10K
grade of an multimeter, the "+" rod end of the multimeter
connect the cathode of the diode, the "-" rod end of the
multimeter connect the anode of the diode (FIG.5 - 7).
The multimeter reading should be about 150 thousand ohms.
The change the rod to different electrode, the reading should be
"∞" . If the reading is very small, and near to short circuit, it
indicates the high voltage diode has been punctured, and
should be replaced by a new one.
If the high voltage diode is OK, then check the forwarding plug
of the transformer to see whether it is enough to 120V. If it is not
enough, check the micro – switch of the time and power
distributor. Connect the two rods of the multimeter to the 1,2
place of the timer with R×1K grade. It is normal if the reading is
"0" when at cut off condition. If the reading is "∞", it indicates
the micro switch has broken, and the timer should be replaced
by a new one. If all the above examination shows normal ,then
check whether the terminal plug of the magnetron and the
capacitor have loosened, if it is loosened, pinch it tightly with a
N
N
T
T
H
H
E
E
O
O
V
V
E
E
N
N
A
A
T
T
O
O
P
P
E
E
H
E
A
T
E
D
E
H
E
A
T
E
D
E
R
R
A
A
T
T
I
I
N
N
G
G
,
,
B
B
U
U
T
T
T
T
H
H
E
E
16
Fig.5-3
Fig.5-4
Fig.5-5
magnetron
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