Sharp R-930AW service manual Test Procedures, Component Test, Letter, Water load cooking test

			R-930AK
			R-930AW
		TEST PROCEDURES
PROCEDURE		COMPONENT TEST
LETTER
Problem: POWER ON, indicator does not light up.
	STEPS	OCCURRENCE	CAUSE OR CORRECTION
	1	The rated voltage is not applied to POWER	Check supply voltage and oven power cord.
		terminal of CPU connector (CN-A).
	2	The rated voltage is applied to primary side	Power transformer or secondary circuit defective.
		of power 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 examine the transformer with an ohmmeter for the presence of layer short-circuit (check the primary coil resist- ance which is approximately 175Ω ± 10%). If any abnormal condition is detected, replace the defective parts.

MCONV	3			d	VRS1	P
FAN	5			b
M
POWER	79				a	3
		CN - A	26	c	T1
				(J1)

VAH SENSOR TEST

Checking the initial sensor cooking condition

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

(2)Room temperature should not exceed 95˚F (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".

(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 vapour given of by the spray and turn off before food is properly cooked.

(8)After 30 minutes if the sensor has not detected the vapour of the food, ERROR will appear and the oven will shut off.

Water load cooking test

Make sure the oven has been plugged in at least five 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 SENSOR COOK pad and number pad 1. Now, the oven is in the sensor cooking condition and "BAKED POTATO" will appear in the display.

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

When the AH sensor is defective (open or short), Error will appear in the display after 16 seconds cleaning time.

If ERROR appears check sensor wire connections and/or AH sensor.

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