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.)
4
Pattern at "a" and "b" are broken.
*Insert the coil RCILF2003YAZZ between "c" and "d".
(CARRY OUT 3D CHECKS BEFORE REPAIR.)
5
4
3
2
1
0
9
8
7
6
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
GRILL
CLOCK
MIX
STOP/
CLEAR
MULTI
COOK
LESS
CARRY OUT 4R CHECKS.
Содержание Carousel R-880F
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