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PROCEDURE
LETTER
9. Replace the CPU unit or the control unit that has any
defective tact switches.
10. Assemble the control panel and reinstall it to the
oven.
11. Reconnect all leads removed from components
during testing.
12. Reinstall the outer case cabinet.
13. Reconnect the power supply cord after the outer
case is installed.
14. Run the oven and check all functions.
V
RELAY TEST
1. Disconnect the power supply cord.
2. Remove the outer case cabinet, referring to "OUTER CASE CABINET REMOVAL".
3. Open the door and block it open.
4. Discharge high voltage capacitor.
5. Disconnect the leads to the primary of the power transformer.
6. Ensure that these leads remain isolated from other components and oven chassis by using insulation tape.
7. After that procedure, re-connect the power supply cord.
8. Remove the outer case and check voltage between Pin Nos. 1 and 9 of the 5 pin connector (CN-D) on the control
unit with an A.C. voltmeter. The meter should indicate 208 volts, if not check oven circuit.
Shut-off, Cook and Heater Relays 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, high speed grill
or normal convection cooking condition.
DC
. voltage indicated .................... Defective relay.
voltage not indicated ............ Check diode which is connected to the relay coil. If diode is good,
DC.
RELAY SYMBOL
RY1
RY2 (COOK)
RY3
RY5
RY6
9. Disconnect the power supply cord, and then remove outer case.
10. Open the door and block it open.
11. Discharge high voltage capacitor.
12. Reconnect all leads removed from components during testing.
13. Re-install the outer case (cabinet).
14. Reconnect the power supply cord after the outer case is installed.
15. Run the oven and check all functions.
W
SOLID-STATE RELAY TEST
1. Disconnect the power supply.
2. Remove the outer case cabinet, referring to "OUTER CASE CABINET REMOVAL".
3. Open the door and block it open.
4. Discharge high voltage capacitor.
5. Disconnect the wire leads from the solid-state relay.
6. Measure the resistance between the terminals as described in the following table, with an ohmmeter.
7. If the meter does not indicate above resistance, replace the solid-state relay.
8. Reconnect all leads removed from components during testing.
9. Re-install the outer case (cabinet).
10. Reconnect the power supply cord after the outer case is installed.
11. Run the oven and check all functions.
TEST PROCEDURES
COMPONENT TEST
control unit is defective.
OPERATIONAL VOLTAGE
Approx. 27.0V D.C.
Approx. 25.0V D.C.
Approx. 25.0V D.C.
Approx. 25.0V D.C.
Approx. 25.0V D.C.
Terminals
Between 1 and 2
Between 3 and 4
23
J1
<CONTROL UNIT (SWITCH UNIT)>
WH-A
SW11-23
(SW11)
(SW12) (SW13) (SW14)
1
6
2
7
11
16
12
17
(SW15)
(SW16)
(SW17)
(SW18)
3
8
4
9
13
18
19
14
(SW20)
(SW21)
(SW22)
(SW19)
STOP
OVEN READY
5
0
20
15
ON/OFF
CLEAR
(SW23)
START
MINUTEPLUS
J2
J4
J5
J3
J6
CONNECTED COMPONENTS
Oven lamp / Turntable motor
Power transformer
Jet motor
Fan motors
Jet motor capacitor
Resistance
Approx. 50MΩ
Approx. 1.3MΩ
R-8000G
CN-J
S10B-PH
SW1-10
10Pin
(SW2)
(SW1)
(SW3)
J7
CONVENIENCE
BAKED
CONVENIENCE
APPETIZERS
MEAT, FISH
GOODS
& SNACKS
& POULTRY
(SW6)
(SW5)
(SW4)
J8
BASIC
SELECTA
SELECTA
TIME
POWER
COOK
(SW7)
(SW8)
(SW9)
J10
SELECTA
CUSTOM
DOUBLE/
PROGRAM
HELP
TRIPLEQTY
(SW10)
J9
SET
1
2
3
4
Solid-state relay
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