Service Manual_2017-V1
31
10. Circuit description
10.1 Power Supply
The AC input power is reduced in voltage by SMPS control chip and filtered off wave by the
inductance-capacitance filter, then output the DC 12V power which will mainly power the relay that
controls strong current. Relay is used to control the strong current loaded switches of compressor, ice
maker and defrost heater. The DC 12V power will output stable 5V electricity after passing through the
adjustor 7805, to power for the main control chip and thus monitor the temperature changes in
refrigerator.
10.2 Door trip test circuit(None)
10.3 Temperature test circuit
It’s conducted by the sensor, making use of the characteristics that resistance value reduces as the
temperature increases, and the thermistor that has temperature coefficient of resistance in medium
temperature.
Summary of Contents for 22031020000125
Page 13: ...Service Manual_2017 V1 13 4 Terms 4 1 Definition of model None 4 2 Location of nameplate None...
Page 19: ...Service Manual_2017 V1 19 7 2 Circulating route of cooling air...
Page 34: ...Service Manual_2017 V1 34 11 Troubleshooting Method 11 1 No cooling Air cooling Electronic...
Page 35: ...Service Manual_2017 V1 35 11 2 No working of compressor...
Page 37: ...Service Manual_2017 V1 37 11 5 Light is not on...