Phone Cannot Be Flashed - Nokia RM-392 Service Manual

RM-392; RM-393
Baseband Troubleshooting Instructions

Phone cannot be flashed

Context
The flash programming can be done via the pads on the PWB (J2060). If failed, then follow up the trouble
shooting flow chart.
In case of flash failure in the FLALI station, swap the phone and send it back to the care program for further
analysis. Possible failures could be short-circuit of balls under µBGAs (Liteplus, UPP8M, FLASH), or missing or
misaligned components.
In flash programming error cases, the flash prommer can give some information about a fault. The fault
information messages could be:
Phone doesn't set FBUS_TX line low
Because of the use of uBGA components, it is not possible to verify if there is a short circuit in the control and
address lines of MCU (UPP8M) and the memory (flash).
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