Samsung RF23R6 Series Service Manual page 104

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PCB DIAGRAM
1. EMI FILTER part
2. DC 15V, 12V, 5V, GND supplied from SMPS PCB
3. Inverter circuit part
-.COMP Driving / Feedback Circuit
-.BOOTSTRAP Charger : It is an independent power circuit for the driving of the IMP High-Phase IGBT.
-. Current Pickup Circuit : It pickups the currents taken by the Shunt resistance and does the PWM DUTY control.
4. FAN MOTOR control part : To supply the power from 7V ~ 12V according to the motor types. (F,R,C,ICE)
5. EEPROM : Save and record every kinds of data.
6. Micom : control the regrigerator Ceramic resonator : generate the basic frequency of Micom operation.
Reset IC : make Micom reset if input voltage of Micom is detected less than the specified voltage
7. Operate ICE-MAKER, supply power to MOTOR, and sense the variation of switch.
8. Main Micom ↔ Panel Micom serial communication circuit - Dispenser option input part (Water & Cover Ice route
switch)
9. Auto Fill control part.
10. Control Mid drawer Room damper & Damper heater
11. Water Tank Heater Controls (also controls other options)
12. LED LAMP Control Circuit (F,R, MID room Lamp)
13. Relay parts that controls AC load and receives Micom operating signal through Sink IC.
14. Connector with AC load
15. Diode option setting area
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