Sharp R-4H56, Service Manual

Page: 19 / 44

R-4H56
17
TEST PROCEDURES (CONT'D)
PROCEDURE
LETTER
COMPONENT TEST
6-1. Touch SENSOR COOK pad and number 1 pad and 0 pad.
6-2. The control panel is in the sensor cooking operation.
6-3. After approximately 20 seconds, push plunger of select switch. This condition is same as
judgement by AH sensor.
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.
R1,R2 : 22 ohm
±
1% 1/2W
R3 : 10k ohm
±
}5% 1/4W
R4 : 1M ohm
±
5% 1/4W
Plunger
NC
NO
COM
COM
NO
NC
R3 R4
R1
R2
1
2
3
F-1
F-2
F-3
To connector (F)
on Control Unit.
CONNECTOR
Figure A. Sensor Dummy Resistor Circuit