18
R-7A55(W)/(B)
R-7E45(W)/(B)
TEST PROCEDURES (CONT'D)
PROCEDURE
LETTER
COMPONENT TEST
KEY UNIT
G-1
G-2
G-3G-4G-5G-6G-7
G-8
G-9
G-10
G-11
G-12
STOP
10
S
1
MIN
10
MIN
R-7A55(B)/(W)
KEY UNIT
G-1
G-2
G-3G-4G-5G-6G-7
G-8
G-9
G-10
G-11
G-12
STOP
10
S
1
MIN
10
MIN
R-7E45(B)/(W)
CARRY OUT 4R CHECKS
M RELAY TEST
CARRY OUT 3D CHECKS
Remove the outer case and check voltage between Pin Nos. 1 and 3 of the 9 pin connector (A)
on the control unit with an A.C. voltmeter.
The meter should indicat 220~230 volts, if not check oven circuit.
Relay Test
Check voltage at the relay coil with a D.C. voltmeter during the microwave cooking operation,
convection cooking operation or grill 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. 20.0V.D.C. Oven lamp/Turntable motor
RY2 Approx. 18.5V.D.C. High voltage transformer
RY3 Approx. 20.0V.D.C. Convection heating element
RY4 Approx. 26.0V.D.C. Convection motor
RY5 Approx. 20.0V.D.C. Grill heating element
RY6 Approx. 26.0V.D.C. Fan motor
RY7 Approx. 26.0V.D.C. Damper motor
CARRY OUT 4R CHECKS
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