R-880F(S)
17
TEST PROCEDURES
PROCEDURE
LETTER COMPONENT TEST
momentary contact. If the control unit responds by clearing with a beep the key unit is faulty and must
be replaced. If the control unit does not respond, it is a faulty and must be replaced. If a specific pad
does not respond, the above method may be used (after clearing the control unit) to determine if the
control unit or key pad is at fault.
CARRY OUT 3D CHECKS.
Remove the outer case and check voltage between Pin No. 1 of the 3 pin connector (A) and the
common terminal of the relay RY6 on the control unit with an A.C. voltmeter.
The meter should indicate 230-240 volts, if not check oven circuit.
Relay Test
Check voltage at the relay coil with a D.C. voltmeter during the microwave cooking operation, grill
operation, convection operation or mix 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. 24.0V D.C. Convection motor
RY2 Approx. 24.0V D.C. High voltage transformer
RY3 Approx. 24.0V D.C. Grill heaters (Top)
RY4 Approx. 24.0V D.C. Bottom heater
RY5 Approx. 24.0V D.C. Fan motor
RY6 Approx. 24.0V D.C. Oven lamp / Turntable motor
CARRY OUT 4R CHECKS.
P RELAY TEST
Q
PROCEDURES TO BE TAKEN WHEN THE FOIL PATTERN ON THE PRINTED WIRING BOARD
(PWB) IS OPEN
To protect the electronic circuits, this model is provided with a fine foil pattern added to the input circuit
on the PWB, this foil pattern acts as a fuse. If the foil pattern is open, follow the troubleshooting guide
given below for repair.
Problem: POWER ON, indicator does not light up.
CARRY OUT 3D CHECKS.
STEPS OCCURRENCE CAUSE OR CORRECTION
1
The rated AC voltage is not present between
Check supply voltage and oven power cord.
Pon No. 1 of the 3-pin connector (A) and the.
common terminal of the relay RY6.
2
The rated AC voltage is present at primary Low voltage transformer or secondary circuit defective.
side of low voltage transformer. Check and repair.
3 Only pattern at "a" is broken.
*Insert jumper wire J1 and solder.
(CARRY OUT 3D CHECKS BEFORE REPAIR.)
4Pattern at "a" and "b" are broken.
*Insert the coil RCILF2003YAZZ between "c" and "d".
(CARRY OUT 3D CHECKS BEFORE REPAIR.)
5
4
3
21
09876
G 8 G 7 G 6 G 5 G 4 G 3 G 2 G 1
G12 G11 G10 G 9
HELP
MORE
Pasta
160˚C 150˚C 130˚C 70˚C 40˚C
250˚C 230˚C 220˚C 200˚C 180˚C
Rice
EASY
DEFROST
PREHEAT
Fresh
Vegetables
Frozen
Vegetables
CONVENIENCE
/PIZZA
INSTANT
COOK/
START
REHEAT
SENSOR
CONVEC
Jacket
Potato
Reheat
Pie
POWER
LEVEL
GRILLCLOCK
MIX
STOP/
CLEAR
MULTI
COOK
LESS
CARRY OUT 4R CHECKS.
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