Circuit Description (Led Model & Semi Model); Pcb Assembly Structure (Electronic Device Box) - Samsung RL44Q Series Service Manual

REFERENCE INFORMATION 5. SELF DIAGNOSIS & TROUBLE SHOOTING
9-3-2 Circuit Description (LED Model & SEMI Model)

9-3-2-1) PCB Assembly Structure (Electronic Device Box)

DC Load Display & Sensor Part
Aux Power
Part "A"
Main-Board
1) There are one PCB Assembly operated by MICOM
2) The refrigerator control part, the part "A", controls the whole parts of a refrigerator as the
earlier MICOM.
3) MICOM which is to control a refrigerator controls the loads (Freezer Fan, R-DAMPER,
Chammart compartment, Defrosting damper, Lamp on/off, etc.) except the compressor, and
the compressor is restarted after 5 minutes from tripping if it is momentary interruption. (The
temperature in freezer compartment is measured when power is on, and if it is under +5°C, it
is judged as a momentary interruption. In this case, all functions are restored to the operating
status before momentary interruption.)
4) BLDC Motor or AC Fan Motor is, as an option, specified for the fan in the freezer
compartment and it is applied on setting and assembling (AC Fan Motor is wired in link with
the compressor and not controlled by the main MICOM)
※ For your safety in case that the refrigerator is plugged, you should be careful.
Ensure the appliance is unplugged before replacing the PCB board.
MICOM
A Part
187
Part
Voltage
- Relay & Display
Aux. Power:
- BLDC Fan Motor
16, 14 VAC
- Refrigerator Compartment
(Transformer)
Damper
- 12VDC
- Refrigerator MICOM
- 5VDC
- Sensor Part
13.2VDC
Driving Load