83
5-12. CoolSelect Zone Panel Circuit
2) Damper drive circuit
2-1) CoolSelet Zone Drawer is controlled by a damper to supply or block cold air. For
Quick Cool, the damper will be close. So cold air is supplied only to CoolSelect
Zone Drawer. For Thaw, the evaporator heater of refrigerator is ON and the
damper is controlled by the refrigerator temperature.
2-2) The stepping motor controlled by a Driver IC TA7774P(IC8) operates the damper.
The stepping motor uses 4 combined signals to open and close the damper.
To prevent the malfuntion from a high humidity, a DC12V, 1W heater is
mounted and activated continuously.
Note
5. Circuit Descriptions
Summary of Contents for RS277ACPN
Page 14: ...15 1 7 Dimensions of Refrigerator inches 1 Product Information...
Page 17: ...18 1 10 Cooling Air Circulation 1 Product Information Freezer Refrigerator...
Page 70: ...71 5 1 Block diagram 5 Circuit Descriptions Double Click...
Page 71: ...72 5 2 SCHEMATIC DIAGRAM 5 Circuit Descriptions Double Click...
Page 72: ...73 5 3 WIRING DIAGRAM 5 Circuit Descriptions Double Click...
Page 74: ...75 5 5 CONNECTOR ARRANGEMENT Main Board 5 Circuit Descriptions Double Click...
Page 87: ...88 5 17 Load Drive Circuit 5 Circuit Descriptions Double Click...
Page 92: ...93 6 Reference Information 6 2 Model name nomenclature...
Page 93: ...94 The End Thank you...