Samsung RL38H Series, Service Manual

Page: 187 / 206

187
5. SELF DIAGNOSIS & TROUBLE SHOOTING REFERENCE INFORMATION
9-3-2 Circuit Description (LED Model & SEMI Model)
9-3-2-1) PCB Assembly Structure (Electronic Device Box)
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.
Part
Voltage Driving Load
A Part
Aux. Power:
16, 14 VAC
(Transformer)
- 12VDC
- 5VDC
13.2VDC
- Relay & Display
- BLDC Fan Motor
- Refrigerator Compartment
Damper
- Refrigerator MICOM
- Sensor Part
Part “A”
Main-Board
DC Load Display & Sensor Part
MICOM
AC Load Part
Aux Power