LG GC-A207, Service Manual

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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-A207
EXPLATION FOR MICOM CIRCUIT
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FREEZER
REFRIGERATOR
LOCK
EXPRESS FRZ
FRZ
TEMP LOCK
UNLOCK
ON
OFF
3SECS
REF
TEMP
Main MICOM LCD dedicated MICOM
DC 12V
GND
Transmission (error status)
Reception (notch status)
Main PCB L/Wire FD/H(4-wires) Display PCB