SOI 05.06 FV 21/34 599 36 78-44
TEST PROCEDURES
PROCEDURE
LETTER
COMPONENT TEST
MC2660E(EU/UK/CH) MC2661E(EU/UK)
ZM266ST (EU/UK) QN4040 JMW2061 EM2612
SW USAGE
1 Start/Quick
2 Not Used
3 Stop
4 Power Level
5 Not Used
6 Auto Defrost
7 Cook from Frozen
8 Auto Cook 2
9 Auto Cook 1
L
RELAY TEST
Remove the outer case and check voltage between Pin No 1and Pin No 3 of the 3 pin
connector (A) on the control unit with an A.C. voltmeter.
The meter should indicate rated voltage, if not check oven circuit.
RY1,RY3 and RY4 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.
DC. voltage indicated ............. Defective relay.
DC. voltage not indicated ....... Check diode which is connected to the relay
coil. If diode is good, control unit is defective.
RELAY SYMBOL OPERATIONAL VOLTAGE CONNECTED COMPONENTS
RY1 Approx. 12.0V D.C. Oven lamp / Turntable motor
RY3 Approx. 12.0V D.C. High voltage transformer
RY4 Approx. 12.0V D.C. Fan motor
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