FLY FS504, Service Manual

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FLY SERVICE SUPPORT
Please repair PCBA with multimeter or oscilloscope, and
stable power supplier.
According to schematic:
1.
Connect PCBA with stable power supplier to check its
current comparing to the good one. If current is not right,
PCBA is bad. (the right current should be 200~300mA)
2. Check U301. If not ok, replace it.
3. Check U101. If not ok, replace it.
If PCBA can’t be switch on, it is more complex. Please check
PCBA with one good sample.
After repairing PCBA, PCBA must be calibrated again.
End