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TEST PROCEDURE
POSSIBLE CAUSE
AND
DEFECTIVE PARTS
PROBLEM
CONDITION
Home fuse or circuit breaker blows
when power cord is plugged into
wall receptacle
Monitor fuse blows when power
cord is plugged into wall receptacle.
OFF
All letters and indicators do not
CONDITION
appear in display when power cord
is first plugged into wall outlet.
Display does not operate properly
when STOP/CLEAR key is
touched. (Buzzer should sound and
":" or time of day should appear in
display.)
Oven lamp does not light when door
is opened.
Oven lamp does not go out when
door is closed.
Oven lamp lights but fan motor
and turntable motor do not operate.
Oven does not go into cook cycle
when START pad is touched
Oven seems to be operating but
tle or no heat is produced in oven
load. (Food incompletely cooked or
not cooked at all at end of cook
cycle.)
COOKING
Oven goes into a cook cycle but
CONDITION
extremely uneven heating is
produced in oven load (food).
Oven does not cook properly when
programmed for Cooking Power 5
mode. (Operates properly on
Cooking Power 10 (HIGH) mode.)
Oven goes into COMPU DEFROST
but food is not defrosted well.
AH sensor does not end during
SENSOR
sensor cooking condition. (Oven
COOKING
does not shut off after a cup of
CONDITION
water is boiling by sensor cooking)
Oven stops at 16 sec. after starting.
PROCEDURE
LETTER
A
MAGNETRON ASSEMBLY TEST
1. Disconnect the power supply cord, and then remove outer case.
2. Open the door and block it open.
3. Discharge high voltage capacitor.
RE RE A B C D E E F F G H RE RE CK I CK CK CK J K L
lit-
TEST PROCEDURES
COMPONENT TEST
11
R-420EK
CK = Check / RE = Replace
M N
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