Samsung RF23HT Series Service Manual

108PCB DIAGRAMThis document can not be used without Samsung's authorization1. DC12V, 5V, GND supplied from SMPS PCB (Not Used)2. Circuit for controlling Step-Valve (3-Way Valve) * Option3. FAN MOTOR control part : To supply the power from 8.3V ~ 12V according to the motortypes. (F,R,C,ICE)4. EEPROM : Save and record every kinds of data.5. Transmit inputted signals from every sensor into MICOM after eliminate the noise.6. Micom : control the refrigerator Ceramic resonator : generate the basic frequency of Micomoperation.Reset IC : make Micom reset if input voltage of Micom is detected less than the specifiedvoltage7. PLC input/output- PLC (Power Line communication) * Option (PLC module is not inserted unless specifiedoccasion)8. Operate ICE-MAKER, supply power to MOTOR, and sense the variation of switch.9. Main Micom ↔ Panel Micom serial communication circuit - Dispenser option input part(Water & Cover Ice route switch)10. Mid drawer Room display control part : display LED, detect KEY state.11. Control Mid drawer Room damper & Damper heater12. Water Tank Heater Controls (also controls other options)13. LED LAMP Control Circuit (F,R room Lamp)14. Relay parts that controls AC load and receives Micom operating signal through Sink IC.15. Connector with AC loada. Diode option setting areab. Inverter COMP controlling signalc. Flow Sensor controlling signal16. WiFi Module Function input/output5-1) PBA Layout with part position