LG SxS GR-B207 - Communication Circuit Between PCBs

1-11. Communication circuit and connection L/Wire between main PCB and display PCB
The following circuit is a communication circuit used for exchanging the necessary information between main MICOM of
main PCB and LCD dedicated MICOM for LCD control of display PCB.
Transmission/receipt L/Wire together with the necessary display PCB for driving the display PCB is required.
Poor communication occurs if a continuous information exchange fail to continue for more than 2 minutes between main
MICOM of main PCB and LCD dedicated MICOM for LCD control of display PCB.
1) GR-P247, L247, P207, L207
EXPLATION FOR MICOM CIRCUIT
- 48 -
GND
12Vdc
Transmission
Transmission
Reception
Reception
CRUSHED CUBED
WATER
TEMP
TEMP
FRZ TEMP
REF TEMP
DISPENSER
LOCK
SUPER FRZ
OFF
ROOM
TEMP
MAXMIN
MAXMIN
Main MICOM LCD dedicated MICOM
DC 12V
GND
Transmission (error status)
Reception (notch status)
Main PCB L/Wire FD/H(4-wires) Display PCB