LG 75NANO90UNA Service Manual page 41

Standard Repair Process
Error
symptom
2. MR20(Magic Remote control) operating error
☞A4
Check the
RF Receiver
INSTART menu ver is "00.00"?
☞A15
Check & Repair
RF assy
connection
☞A4
RF Receiver ver
is "00.00"?
Down load the Firmware
* INSTART MENU14.RF
Remote control Test3.
Firmware download
D. Function error
MR20 operating checking
N Check MR20
itself Operation
Y
N
Close
Y
Normal Y
Press the
operating?
wheel
N
Check & Replace
Battery of MR20
Y
Normal
Close
operating?
N
Replace
MR20
* If you conduct the loop at 3times, change the MR20.
12
Established
date
Revised date
Turn off/on the
N
Is show ok
set and press
message?
the wheel
Y
Close
N
Is show ok
message?
Y
Close
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Only for training and service purposes.
Press the back
key about 5sec