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FMV156EMC
PROCEDURE
LETTER
7. After that procedure, re-connect the power supply cord.
8. check voltage between normal open terminal of the relay RY and the normal open terminal of the
relay RY1 on the control unit with an A.c. voltmeter.
the meter should indicate 10 volts, if not check oven circuit.
RY1, RY, RY4, and RY5 Relay test
these relays are operated by D.c. voltage
check voltage at the relay coil with a D.c. voltmeter during the microwave cooking operation.
RElAY SYMBol
9. Disconnect the power supply cord.
10. open the door and block it open.
11. to discharge high voltage capacitor, wait for 60 seconds.
1. Reconnect all leads removed from components during testing.
13. Re-install the hood intake duct R.
14. Re-install the outer case (cabinet).
15. Reconnect the power supply cord after the outer case is installed.
16. Run the oven and check all functions.
O
DEFROST CENTER TEST
(1) open the door.
() Place one cup of water in the center of the turntable tray in the oven cavity.
(3) close the door.
(4) touch the " DEFRoSt" pad once.
(5) touch the number pad "".
(6) touch the number pad "5".
(7) touch the " StARt " button.
(8) the oven is in Defrost center cooking condition.
(9) the oven will operate as follows.
Steaks/chops
0.5lbs
(8) If improper operation is indicated, the control unit is probably defective and should be checked.
P
FOIL PATTERN ON THE PRINTED WIRING BOARD TEST
to protect the electronic circuits, this model is provided with a fine foil pattern added to the primary on
the PWB, this foil pattern acts as a fuse.
1. Foil pattern check and repairs.
1) Disconnect the power supply cord.
) open the door and block it open.
3) to discharge high voltage capacitor, wait for 60 seconds.
4) Remove the control unit, referring to the procedure of " coNtRol PANEl ASSEMBlY, coNtRol
UNIt AND KEY UNIt REMoVAl ".
5) Follow the troubleshooting guide given below for repair.
TEST PROCEDURES
Dc. voltage indicated
Dc. voltage not indicated
oPERAtIoNAl VoltAGE
RY1
Approx. 6.6V D.c.
RY(cooK)
Approx. 6.0V D.c.
RY4
Approx. 6.6V D.c.
RY5
Approx. 6.6V D.c.
Menu
1St StAGE
lEVEl
tIME
60%
57sec.
COMPONENT TEST
Defective relay.
check diode which is connected to the relay coil. If diode
is good, control unit is defective.
coNNEctED coMPoNENtS
oven lamp / Fan motor / turntable motor
Power transformer
Hood motor
Hood lamp
ND StAGE
lEVEl
tIME
40%
17sec.
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