5-15
(TROUBLE 3) Display shows all figures set, but oven does not start cooking while
desired program times are set and START pad is touched.
(TROUBLE 4) Oven seems to be operation but output power is low.
CONDITION
CHECK
RESULT
CAUSE
REMEDY
1.Setting time does
not count down
when touching
START pad.
2. Fan motor or
oven lamp
do not turn
on.
No continuity.
continuity.
No continuity.
Continuity.
Check the con-
nection between
connector and
P.C.B assembly.
Defective
secondary switch.
Replace
secondary switch.
Loose connection.
Connection then
tightly.
Check continuity
of secondary
switch (with
door closed).
Check fan motor.
Check oven lamp.
Abnormal.
Abnormal.
Normal.
Defective fan
motor.
Defective oven
lamp.
Replace fan
motor.
Replace oven
lamp.
Defective P.C.B
assembly.
Replace P.C.B
assembly.
CONDITION
CHECK
RESULT
CAUSE
REMEDY
Output is low.
Lower than 90% of
rating voltage.
Normal.
Normal.
Abnormal.
Abnormal.
Measure the
output power.
Disconnect the
wire leads from
relay 2 and check
on and off time
with multitester.
Defective P.C.B
assembly.
Replace P.C.B
assembly.
Decrease in power
source voltage
with load.
Suggest customer
contact local
electric power
utility co. or
qualified
electrician.
Check the
power source
voltage.
Defective
magnetron.
Replace
magnetron.
NOTE: Refer to Page 5-3 for measuring of microwave power output.
Summary of Contents for NN-ST34HMRPH
Page 10: ...SCHEMATIC DIAGRAM 4 4 ...
Page 30: ...6 2 DOOR PARTS D03 ...
Page 31: ...6 3 CONTROL PANEL PARTS C 05 ...
Page 32: ...6 4 OVEN CAVITY PARTS ...
Page 33: ...6 5 LATCH BOARD PARTS ...
Page 34: ...INTERIOR PARTS 6 6 ...
Page 35: ...6 7 BASE PLATE PARTS ...
Page 41: ......
