LG T5100 Service Manual page 61

3. BASEBAND PART TROUBLE SHOOTING
Folder Trouble (On/Off)
START
The all paths connected
to U1 are OK?
Yes
The 2V8_RIO is 2.8V?
Yes
Folder1 signal is low on
magnetizing into U1?
Yes
The DBB(Calypso) is broken.
Change the board.
Folder Trouble (Normal/Reverse)
ST ART
The all paths connected to
U2 are OK?
Yes
The 2V8_RIO is 2.8V?
Yes
Folder2 signal is low on
magnetizing into U2?
Yes
The DBB(Calypso) is broken.
Change the board.
No
Resolder the R29
Refer to Power On
No
Trouble.
Replace the U1.
No
U1 is broken.
No
Resolder the R30
Refer to Power On
No
Trouble.
Replace the U2.
No
U2 is broken.
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