AmazonBasics S9N29R Service Manual

10
TROUBLE 2
Oven does not operate at all. Display window does not display any gures and no input
is accepted.
TROUBLE 3
Display shows all gures set, but oven does not start cooking while desired program times are
set and START pad is touched.
TROUBLE 4
Oven seems to be operating but output power is low.
Fuse blows Continuity
Malfunction of the
monitor switch
Check continuity
of monitor
switch (with
door closed)
Check continuity
of primary
switch (with
door opened)
No continuity
Disconnect one
side of the wire
lead connected
from transformer
to the high-
voltage capacitor
and operate
the unit
No continuity
Continuity
Shorted contact at
the primary switch
Fuse blows again
Normal
Defective high-
voltage capacitor
Replace high-
voltage capacitor
Defective high-
voltage transformer
Replace high-voltage
transformer
Replace fuse
CONDITION CHECK RESULT CAUSE REMEDY
Replace primary
and monitor
switches
Replace primary
and monitor
switches
CONDITION CHECK RESUL T CAUSE REMEDY
Setting time does
not count down
when touching
START pad
Fan motor or
oven lamp
do not turn on
No continuity
Continuity
No continuity
Continuity
Check the con-
nection between
connector and
PCB assembly
Defective
secondary switch
Replace
secondary switch
Defective PCB
assembly
Replace PCB
assembly
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
Loose connection
Connection then
tightly.
CONDITION CHECK RESULT CAUSE REMEDY
Output is low
Lower than 90%
of rating voltage
Normal
Normal
Abnormal
Disconnect the
wire leads from
Relay 1 and check
on and off time
with multitester
Defective PCB
assembly
Replace PCB
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

AmazonBasics S9N29R Specifications

General

Brand	AmazonBasics
Model	S9N29R
Category	Microwave Oven
Language	English