Samsung RH25H561 Series Service Manual page 67

6. PCB DIAGRAM
6-1) Part Arrangement (Main PBA)
0. SMPS Circuit : Not used.
1. Ice Maker Circuit : Receiving the data of sensor, Hall S/W, Ice Route Micro S/W
2. Ice Maker Control Circuit : Controlling AC Load like motor, solenoid, heater related to ice making
3. Heater Control : Relays for F/R-def-heater, R-H/B-heater, Pipe-heater, Dispenser-heater F/R-cap-heater,
DC-door-heater
4. Driver IC : Using MICOM signal to control relays.
5. BLDC Fan Control circuit : Supplying the power to the fan motor using PWM
6. Inverter Communication circuit : Sending operating RPM signal & receiving error feedback.
7. Step Valve control circuit : using motor driver IC to control step valve motor
8. Lamp control circuit : Controlling F&R room lamp
9. PLC circuit : Power Line Communication Circuit
10. Display communication circuit (UART) and Dispenser lever, H/B, Door switch signal
11. Sensor circuit : sensing several sensors signal.
12. EEPROM : memory for data saving.
13. Cool Select Zone control circuit
A. Diode option setting part
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