Sharp R-9X55 - Page 25

R-9X55
TEST PROCEDURES
PROCEDURE
LETTER
COMPONENT TEST
6-4. After approximately 3 seconds, cooking operation turns off, an audible signal will sound. and
the display will then revert to the time of day.
If the above is not the case, the control unit is probably defective.
If the above is proper, the AH sensor is probably defective.
Rl, R2: 22 ilil% 1,2w
R3:lOk iZ t 5O& 1,4W
R4: IM <Iz~?/o l14W
To connector (F)
on Control Unit.
CONNECTOR
Figure A. Sensor Dummy Resistor Circuit
Iger
NC
NO
P WElGHT SENSOR ASSEMBLY AND lC3(MEMORY) TEST.
After replacing the weight sensor or iC3. carry out the following orocedure :r, order 13 saiibrare ir,
weight sensor. If the weight sensor is not recalibrate, the food may oe over or Grde- ..xcw:.
The following procedure should be carried out garth imicrowave over rn a ftQ as<~r;l~ler: conZ;t c’-
(with outer case fitted}.
1. Place the turnrable on the turntable support plate correctly, and close the door
2. Plug the oven into a power point. (“88:88” will appear on the display.)
3. After 3 seconds or more. Press the STOP/CLEAR pad. (Display shows ” 0” .Gth sound .c;:
buzzer.)
4. Press the AUTO START’CLOCK pad. (Display shows ” 0” with sound of buzzer.)
5.
Press the GRILL pad. (Display shows ” O”.)
6. Press the POWER LEVEL pad. (Display shows ” O”.)
7. Press the INSTANT COOK/START pad. (Display shows ” TEST” with sound of buzzer.!
8. Press the “4” of number pads. (Display shows ” DISH” with sound of buzzer. and tuntable and oven
lamps come on.)
9. After 13 seconds, make sure that the display shows “25000 - 35000” with sound of buzzer.
If display shows less than 25000 or more than 35000, weight sensor is defect.
10. Place the weight 2 Kg + 209 (water load 2 Kg + 209) on the turntable.
11. Press the “6” of number pads. (Display shows ”
DISH” with sound of buzzer, and turntable and
oven lamps come on.)
12. After 13 seconds, make sure that the display shows “02300 - 02800” with sound of buzzer.
If display shows less than 02300 or more than 02800, weight sensor is defect.
13. Disconnect the oven from power supply, and repeat above procedure items 1 to 7
14. Press the “7” of number pads, and make sure that the display shows "02300 -02800".
If display shows less than 02300 or more than 02800, IC3 is defect.
MONITOR RESISTOR TEST
CARRY OUT aCHECKS.
Disconnect the leads from the monitor resist. Using an ohmmeter and set on a low range. Check
between the terminals of the monitor resistor.
The resistance of monitor resistor is approx. 0.8 ohms.
If incorrect readings are obtained, replace the monitor resistor.
CARRY OUT 4R CHECKS.
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