R-2277 - Sharp Home Appliance Service Manual (repair manual). Page 16

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CARRY OUT 3D CHECKS.
Disconnect the leads from the motor. Using an ohmmeter, check the resistance between the two
terminals.

CARRY OUT 3D CHECKS.

Disconnect the leads from the monitor resistor. Using an ohmmeter and set on a low range. Check
between the terminals of the monitor resistor.

The resistance of monitor resistor should be read approx. 4.3

Ω

.

If incorrect readings are obtained, replace the monitor resistor.

CARRY OUT 4R CHECKS.

CARRY OUT 3D CHECKS.
Disconnect connector-H from the CPU unit. Measure the resistance of the thermistor with an
ohmmeter. Connect the ohmmeter leads to the leads of the thermistor.

Room Temp.

Resistance

15˚C ........................ Approx. 15.91 k

Ω

20˚C ........................ Approx. 13.04 k

Ω

25˚C ........................ Approx. 10.74 k

Ω

If the meter does not indicate above resistance, replace the thermistor.

CARRY OUT 4R CHECKS.

CARRY OUT 3D CHECKS.

Disconnect connector-B from the CPU unit. Measure the resistance of the thermistor with an
ohmmeter. Connect the ohmmeter leads to the leads of the thermistor.

Room Temp.

Resistance

15˚C ........................ Approx. 77.45 k

Ω

20˚C ........................ Approx. 61.47 k

Ω

25˚C ........................ Approx. 49.12 k

Ω

If the meter does not indicate above resistance, replace the thermistor.

CARRY OUT 4R CHECKS.

CARRY OUT 3D CHECKS.

Disconnect connector-D from the CPU unit. Measure the resistance of the thermistor with an
ohmmeter. Connect the ohmmeter leads to the leads of the thermistor.

Room Temp.

Resistance

15˚C ........................ Approx. 15.88 k

Ω

20˚C ........................ Approx. 13.03 k

Ω

25˚C ........................ Approx. 10.74 k

Ω

If the meter does not indicate above resistance, replace the thermistor.

CARRY OUT 4R CHECKS.