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R-430BK
R-430BW
R-430BD
TEST PROCEDURES
Procedure Letter
Component Test
G .
Touch Control Panel Assembly Test (Confinued)
When testing is completed,
1. Disconnect the
power
supply cord, and then remove outer case cabinet.
2. Open the door and block it open.
3. Discharge the high voltage capacitor.
4. Reconnect all leads removed from components during testing.
5. Re-install the outercase cabinet.
6. Reconnect the power supply cord after installing the outer case cabinet.
7. Run the oven and check all functions.
H
.
Relay Test
1. Disconnect the power supply cord, and then remove outer case cabinet.
2. Open the door and block it open.
3. Discharge the high voltage capacitor.
4. Disconnect the leads to the primary of the power transformer.
5. Ensure that the leads remain isolated from other components and oven chassis by using insulated
tape.
6. After the above procedure , reconnect the power supply cord.
7. Check voltage between Pin No. 1 of the 2 pin connector (A) and the common terminal of the relay
RYI on the control unit with A.C. voltmeter. The meter should indicate 120volts. If not, check oven
circuit.
RY-1 and RY-2 Relay Test
These relays are operated by D.C. voltage.
Check voltage at the relay coil with a DC. 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.
1 Relay Symbol
1
Operational
Voltage
1
Connected Components
RY
1
RY2
Approx. 24.3 V DC
Approx. 23.5 V DC
Oven lamp/Turntable motor/Cooling fan motor
Power transformer
8. Disconnect the power supply cord.
9. Open the door and block it open.
10. Discharge the high voltage capacitor.
11. Reconnect all leads removed from components during testing.
12. Re-install the outer case cabinet.
13.Reconnect the power supply cord after installing the outer case cabinet.
14.Run the oven and check all functions.
I .
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, which acts as a fuse.
1 Foil Pattern check and repairs
1. Disconnect the power supply cord, and then remove outer case cabinet.
2.
Open the door and block it open.
3. Discharge the high voltage capacitor.
4.
Follow the troubleshooting
guide given below for repair.
1 Steps
1
Occurrence
1
Cause or Correction
1
Only pattern at "a" is broken.
* Insert jumper wire Jl and solder.
I
2
I Pattern at "a" and '?I" are broken
I *
Insert the coil
RCILF~OO~YAZZ
between "c" and "d".
1
8
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