LG MG810c Service Manual page 51

4. TROUBLE SHOOTING
F. Folder On/Off and Trouble Shooting
• Folder Operation(ON/OFF)
- There is a magnet to detect the folder status, opened or closed.
- If a magnet is close to the hall-effect switch(U101) the voltage at pin 1 of U101 goes to 0V.
Otherwise, 2.8V
- This Folder signal is delivered to DBB, and the status of folder is reported.
• Folder Trouble (On/Off)
START
The all paths
connected to U101
Yes
The V_IO is 2.8V?
Yes
Folder1 signal is low
on magnetizing into
Yes
The DBB(Calypso) is broken.
Change the board.
- 50 -
Resolder
No
the C102, R103
Refer to Power On
No
Trouble.
Replace the U101.
No
U101 is broken.