Sharp R-733B, Service Manual, Page: 12 / 40

10 R-733 -
PROBLEM
Fuse F2 15A blows when power
cord is plugged into wall outlet.
Fuse F8A blows when the door
is opened.
Oven lamp does not light when door
is opened. (Display appears.)
Home fuse blows when power
cord is plugged into wall outlet.
“88:88” does not appear in display
when power cord is plugged into
wall outlet.
Display does not operate properly
when STOP pad is touched.
Oven does not start when START
pad is touched. (Display appears.)
Oven lamp does not light.
(Turntable motor operates.)
Fan motor does not operate. (Oven
lamp light.)
Turntable motor assembly does not
operate. (Oven lamp light.)
Oven or electrical parts do not stop
when cooking time is 0 or STOP
pad is touched.
Oven goes into cook cycle but
shuts down before end of cooking
cycle.
Oven stops as soon as the START
pad is touched. (Except for Grill
Cooking)
Oven seems to be operating but
little or no heat is produced in oven
load. (Microwave power level is set
at ”HIGH”)
Oven does not operate properly
during the variable cooking condition
except ”HIGH” cooking condition.
(Oven operates properly at HIGH)
Oven goes into cook cycle but shuts
down before end of cooking cycle.
Grill Heating element does not
operate.
Oven seems to be operating but
little or no heat is produced in oven
load. (Microwave power does not
seem to be generated properly)
Grill Heating element does not
operate.
POSSIBLE CAUSE
AND
DEFECTIVE PARTS
TEST PROCEDURE
CONDITION
OFF
CONDITION
COOKING
CONDITION
(COMMON)
MICROWAVE
COOKING
CONDITION
GRILL
COOKING
CONDITION
H
.
V
.
C
A
P
A
C
I
T
O
R
M
O
N
I
T
O
R
E
D
L
A
T
C
H
M
A
G
N
E
T
R
O
N
P
O
W
E
R
T
R
A
N
S
F
O
R
M
E
R
H
.
V
.
R
E
C
T
I
F
I
E
R
A
S
S
E
M
B
L
Y
DUAL
COOKING
CONDITION
T
H
E
R
M
A
L
C
U
T
|
O
U
T
1
5
0
C
S
T
O
P
S
W
I
T
C
H
F
U
S
E
T
H
E
R
M
A
L
C
U
T
|
O
U
T
1
2
5
C
T
H
E
R
M
A
L
C
U
T
|
O
U
T
1
6
0
C
F
U
S
E
1
5
A
F
2
N
O
I
S
E
F
I
L
T
E
R
F
A
N
M
O
T
O
R
O
P
E
N
E
D
W
I
R
E
H
A
R
N
E
S
S
S
H
O
R
T
E
D
W
I
R
E
H
A
R
N
E
S
S
O
V
E
N
L
A
M
P
O
R
S
O
C
K
E
T
P
O
W
E
R
S
U
P
P
L
Y
C
O
R
D
G
R
I
L
L
H
E
A
T
I
N
G
E
L
E
M
E
N
T
S
T
U
R
N
T
A
B
L
E
M
O
T
O
R
M
I
S
A
D
J
U
S
T
M
E
N
T
S
W
I
T
C
H
E
S
C
O
N
T
R
O
L
P
A
N
E
L
R
E
L
A
Y
R
Y
|
1
R
E
L
A
Y
R
Y
|
3
R
E
L
A
Y
R
Y
|
2
F
O
I
L
P
A
T
T
E
R
N
O
N
P
.
W
.
B
.
F
1
A B C D E E E F F F G H I K K L M O O O P
F
U
S
E
8
A
F
8
A
F
1
TEST PROCEDURES
M
O
N
I
T
O
R
S
W
I
T
C
H
S
W
I
T
C
H