Sharp R-3H57 Service Manual page 10

Microwave oven
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R-3H57
TEST PROCEDURE
POSSIBLE CAUSE
AND
DEFECTIVE PARTS
PROBLEM
CONDITION
Home fuse blows when power sup-
ply cord is plugged into wall outlet.
FUSE M8A blows when power
supply cord is plugged into wall
outlet.
Display does not show anything
when power supply cord is plugged
OFF
CONDITION
into wall outlet.
Display does not operate properly
when STOP/CLEAR pad is
touched.
Oven lamp does not light at door
opened. (Display appears.)
Oven does not start when the
START pad is touched. (Display
appears)
Oven lamp does not light (Display
appears.)
Fan motor does not operate. (Dis-
play appears.)
Turntable motor assembly does
not operate. (Display appears.)
Oven or any electrical parts does
not stop when cooking time is 0 or
STOP/CLEAR pad is touched.
Oven seems to be operating but
little or no heat is produced in oven
ON
load. (Microwave power level is
CONDITION
set at HIGH)
Oven does not seems to be oper-
ating properly when MEDIUM
HIGH, MEDIUM, MEDIUM LOW
or LOW is set. (Oven operates
properly at HIGH and then the
STOP/CLEAR pad is touched the
oven stops.)
Oven goes into cook cycle but shuts
down before end of cooking cycle.
Oven stops as soon as when the
START pad is touched.
AH sensor does not end during
Sensor Cooking condition. (Oven
does not shut off after a cup of
SENSOR
COOKING
water is boiling by sensor cooking.
CONDITION
Oven stops at 16 sec. after start-
ing.
A B C D E E E E G F F H H I J K L M
8
CK = Check / RE = Replace
N O
RECK CKRECK CKCKCKCK

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