LG H990ds - Page 64

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3. TROUBLE SHOOTING
3.10 NFC PART
Yes
No
START
USIM read ?
Check USIM
Check or Replace Main PCB
Change Main Board.
Yes
No
NFC antenna normal ?
Check or Replace NFC
antenna in Battery Cover
Yes
No
Check the antenna clip
Check or Replace
the antenna clip
Yes
No
Signal of TP1
Is it 27.12MHZ ?
Check the components
around X5100 or
Replace Crystal(X5100)
Yes
No
Voltage of TP2
Is it +1.8V ?
Check or Replace U5100
NFC
Checking Flow Image
Bottom
Antenna clip
TP1
TP2
U5100
X5100
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