FLY VK3100 Service Manual page 68

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Flip Detection Trouble
Flip Detection Trouble
VK Quality Group GSM C/S
START
Flip Key
NO
EL_FPCB U101
Well Solder?
YES
NO
U101 (Pin1)
2.8V?
YES
Near Magnetic
NO
U101(pin2)
Any change?
YES
Check V250G
END
EL_FPCB rework
U101
Check U502
EL_FPCB Replace
U101