2 – 2
[2] When the testing is completed,
1.
CARRY OUT 3D CHECKS.
2.
CARRY OUT 4R CHECKS.
2-1.Reconnect all leads removed from components during testing.
2-2.Reinstall the outer case.
2-3.Reconnect the power supply cord after the outer case is installed.
2-4.Run the oven and check all function.
[3] After repairing
1. CARRY OUT 4R CHECKS.
Ovens should not be run empty. To test for the presence of microwave energy within a cavity, place a cup of cold water on the turntable tray, close the
door and set the power to 100% and set the microwave timer for two (2) minutes. When the two minutes has elapsed (timer at zero) carefully check
that the water is now hot. If the water remains cold carry out Before Servicing procedure and re-examine the connections to the component being
tested.
When all service work is completed and the oven is fully assembled, the microwave power output should be checked and microwave leakage test
should be carried out.
[4] Before replacing the Printed Wiring Board
Some normal boards are found in board units that have been returned due to oven failure. So, most of board replacements may arise from poor har-
ness connection. Accordingly, before replacing any board that was judged to require its replacement, use the following procedure to re-check that the
connection terminal of a connector has been properly inserted:
1. When the connectors have been incorrectly inserted to the control unit.
2. When latch switch adjustment is incorrect
When latch switch adjustment is incorrect, symptoms such as no heating, no heating start, no activation even with start button pressed, etc. will occur.
m
o
t
p
m
y
S
R
O
T
C
E
N
N
O
C
B
W
P
CONTROL UNIT
RY-2
No heating can be done.
CN-B
No heating can be done (even if the door has not been opened).
CN-C
No heating can be done.(Control signals can not be sent to inverter unit.)
CN-A
The oven cannot be powered on, no fan motor runs and no oven lamp illuminate.
CN-F
No heating can be done. (Humidity sensor error)
R-350Y(S)
