Flash Programming Does Not Work - Nokia RM-291 Service Manual

RM-291
Baseband troubleshooting Nokia Customer Care

Flash programming does not work

Troubleshooting flow
The flash programming can be done via the pads on the PWB (J2060).
In case of Flash failure in 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 (UEMCLite, UPP, FLASH). 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 control- and
address lines of MCU (UPP) and memory (flash).
Issue 1 COMPANY CONFIDENTIAL Page 6 –7
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