LG F3000 - Page 91

4. TROUBLESHOOTING
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START
Check the magnet
in upper side
No
Voltage at Pin 6 of U402
= 2.8V ?
No
Yes
Yes
Place the magnet
Voltage 2V8_EXTof ABB
= 2.8V?
No
Replace ABB(U101)
Yes
Resolder U402
FOLDER WILL WORK
PROPERLY.
Open slide.
Voltage at Pin 1 of U402
= 2.8V ?
No
Resolder R402 & U402
Close Folder or
Voltage at pin 1 of U402
=0V?
Yes
No
Replace U402
Does it work properly ?
Yes
No
Re-download software or
Change the main board.
Yes
Checking Flow