Text preview for : AW1-12_RF261_140218_SERVICE_MANUAL_PCB_DIAGRAM.pdf part of Samsung AW1-12 RF261 140218 SERVICE MANUAL PCB DIAGRAM Samsung Refridgerators RF260BEAEWW_AA Service Manual AW1-12_RF261_140218_SERVICE_MANUAL_PCB_DIAGRAM.pdf
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5. PCB DIAGRAM
5-1) PCB Layout with part position ................................................................................................................... 86
5-2) PCB Layout with part position (Inverter Board) ........................................................................................87
5-3) PCB Layout with part position (Inverter Board)....................................................................................... 88
5-4) Connector Layout with part position (Main Board) ................................................................................. 89
5-5) Connector Layout with part position (Inverter Board) .............................................................................. 90
86
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PCB DIAGRAM
5-1) PCB Layout with part position
1. DC12V, 5V, GND supplied from SMPS PCB (Not Used)
2. Circuit for controlling Step-Valve (3-Way Valve) * Option
3. FAN MOTOR control part : To supply the power from 8.3V ~ 12V according to the motor types.
(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 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. PLC input/output
- PLC (Power Line communication) * Option (PLC module is not inserted unless specified occasion)
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. PANTRY Room display control part : display LED, detect KEY state.
11. Control PANTRY Room damper & Damper heater
12. 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 load
a. Diode option setting area
b. Inverter COMP controlling signal
c. Flow Sensor controlling signal
87
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PCB DIAGRAM
5-2) PCB Layout with part position (Inverter Board)
1. PCB Power Supply : From the SMPS circuit, it supplies 13.2V and 5V for the Main PBA control and
supplies 15V and 5V to the Inverter circuit for the Compressor control.
2. Inverter Control Circuit : Fridge Compressor Control Circuit.
3. COMP Driving / Feedback Circuit
It receives the COMP operation signals from the Main PBA and feedbacks the inverter errors to the
Main PBA.
4. BOOTSTRAP Charger : It is an independent power circuit for the driving of the IMP High-Phase IGBT.
5. Current Pickup Circuit : It pickups the currents taken by the Shunt resistance and does the PWM
DUTY control.
6. IPM (FNE41060)
7. Micom (MN103SFC2D)
88
PCB DIAGRAM
5-3) PCB Layout with part position (Inverter Board) (RF26H*)
1. PCB Power Supply : From the AC Input Voltage(115V), it supplies DC 15V and 5V to the Inverter circuit for the
Compressor control.
2. COMP Driving / Feedback Circuit
It receives the COMP operation signals from the Main PBA and feedbacks the inverter errors to the Main PBA.
3. Micom (MN103SFC2D)
4. BOOTSTRAP Charger : It is an independent power circuit for the driving of the IMP High-Phase IGBT.
5. Current Pickup Circuit : It pickups the currents taken by the Shunt resistance and does the PWM DUTY control.
6. IPM (FNB40560)
89
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PCB DIAGRAM
5-4) Connector Layout with part position (Main Board)
5-3-1. RF261*
90
This document can not be used without Samsung's authorization
PCB DIAGRAM
5-5) Connector Layout with part position (Inverter Board)
91
PCB DIAGRAM
(RF26H*)
AC 115V COMP
: DC 5V
: GND
: COMP. RPM
: COMP. Feed-
back
92