Sharp R-409HK, Руководство по обслуживанию

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16
R - 4 1 0 H K
R-410HW
R - 4 0 9 H K
TEST PROCEDURES
PROCEDURE
LETTER
COMPONENT TEST
1. Disconnect the power supply cord, and then remove outer case.
2. Open the door and block it open.
3. Discharge high voltage capacitor.
4. Disconnect the leads to the primary of the power transformer.
5. Ensure that these leads remain isolated from other components and oven chassis by using insulation
tape.
6. After that procedure, re-connect the power supply cord.
7. Remove the outer case and check voltage between the normal open terminal of the relay RY1 and the
normal open terminal of the relay RY2 on the control unit with an A.C. voltmeter.
The meter should indicate 120 volts, if not check oven circuit.
RY1 and RY2 Relay 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.
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. 12V D.C. Oven lamp / Turntable motor / Cooling fan motor
RY2 Approx. 12V D.C. Power transformer
8. Disconnect the power supply cord, and then remove outer case.
9. Open the door and block it open.
10. Discharge 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 the outer case is installed.
14. Run the oven and check all functions.
Key Unit
K RELAY TEST
Pin
NO. G1
Pin
NO. G13
Key unit ribbon cable
Key unit (Membrane Switch) front view
G10
G11
G12
G13
G9
G8 G7 G6 G5 G4 G3 G2 G1
POPCORN
9
3
6
2
5
8
0
1
4
7
TIMER
CLOCK
COOK
START
STOP
CLEAR
POWER
LEVEL
CLEAR
DEFROST
MINUTE
PLUS
REHEAT
* *
*
*
When door is close, key can be operated.
L DEFROST TEST
WARNING : The oven should be fully assembled before following procedure.
(1) Place one cup of water in the center of the turntable tray in the oven cavity.
(2) Open the door.
(3) Touch the " DEFROST " pad.
(4) Touch the number pad " 2 ".
(5) Touch the number pad " 5 ".
(6) Close the door.
(7) Touch the "START " pad.
(8) The oven is in Defrost cooking condition.
(9) The oven will operate as follows