81
5-11. Key Scan and Display Circuit
5. Circuit Descriptions
The step signals of DC 11
∼
12V will be generated periodically. If a sink signal
outputs from IC4, DC 11-12V will be applied to the LED input terminal and sink
the LED output terminal to 0V. Therefore, LED will be ON for 2 miliseconds.
2) Key Scan
The 6 step signals, Q6
∼
Q4 are applied to scan the 6 keys (buttons). When SW6
is pressed, the step signal from Q6
will be reduced to 5V and entered to the MICOM, then MICOM will match a
corresponding function for SW6 key.
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...