Pcb Diagram; 7-1) Pcb Layout With Part Position - Samsung RF18A Series Service Manual

7. PCB DIAGRAM

7-1) PCB Layout with part position

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)
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. (OPTION)
8. Main Micom ↔ Panel Micom serial communication circuit - Dispenser option input part (Water & Cover Ice route switch)
9. LED LAMP Control Circuit (F,R room Lamp)
10. Connector with AC load
11. Diode option setting area
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