Sharp R-480J Carry OUT 3D Checks Steps Occurrence Cause or Correction, Omif, AH Sensor Test

R-480J

	TEST PROCEDURES
PROCEDURE	COMPONENT TEST
LETTER

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.
	Pin No. 1 of the 2-pin connector (A) and the
	normal open terminal of the relay RY1.
2	The rated AC voltage is present to 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.
4	Pattern at "a" and "b" are broken.	*Insert the coil RCILF2003YAZZ between "c" and "d".

NOTE: *At the time of making these repairs, make a visual inspection of the varistor. Check for burned damage and exam- ine the transformer with a tester for the presence of layer short-circuit (check the primary coil resistance). If any ab- normal condition is detected, replace the defective parts.

CARRY OUT 4R CHECKS.

QKITPB026MRE0	VRS1		1
			AC
			2
	d	CN - A	XA
		b	(J1)		c
	a	VH		T1
					D U	OMIF

OAH SENSOR TEST

Checking the initial sensor cooking condition

WARNING : The oven should be fully assembled before following procedure.

(1)The oven should be plugged in at least two minutes before sensor cooking.

(2)Room temperature should not exceed 35˚C.

(3)The unit should not be installed in any area where heat and steam are generated. The unit should not be installed, for example, next to a conventional surface unit. Refer to the “INSTALLATION INSTRUCTIONS” of the operation manual.

(4)Exhaust vents are provided on the back of the unit for proper cooling and air flow in the cavity. To permit adequate ventilation, be sure to install so as not to block these vents. There should be some space for air circulation.

(5)Be sure the exterior of the cooking container and the interior of the oven are dry. Wipe off any moisture with a dry cloth or paper towel.

(6)The Sensor works with food at normal storage temperature. For example, chicken pieces would be at refrigerator temperature and canned soup at room temperature.

(7)Avoid using aerosol sprays or cleaning solvents near the oven while using Sensor settings. The sensor will detect the vapor given of by the spray and turn off before food is properly cooked.

(8)If the sensor has not detected the vapor of the food, ERROR will appear and the oven will shut off.

Water load cooking test

WARNING : The oven should be fully assembled before following procedure.

Make sure the oven has been plugged in at least two minutes before checking sensor cook operation. The cabinet should be installed and screws tightened.

(1)Fill approximately 200 milliliters (7.2 oz) of tap water in a 1000 milliliter measuring cup.

(2)Place the container on the center of tray in the oven cavity.

(3)Close the door.

(4)Touch the CLOCK once, the POWER LEVEL pad twice, the START pad once, the number pad 1 once and the number pad 4 once. Now, the oven is in the sensor cooking condition, and "AH20", "SENSOR" and "COOK" will appear in the display.

(5)The oven will operate for the first 16 seconds, without generating microwave energy.

NOTE: ERROR will appear if the door is opened or STOP/CLEAR pad is touched during first stage of sensor cooking.

(6) After approximately 16 seconds, microwave energy is produced.

If ERROR is displayed or the oven does not turn off, replace the AH sensor or check the control unit, refer to explanation below. If the oven stops after 5 minutes and ERROR is displayed, the AH sensor is normal. Check other parts except the AH sensor.

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