User Guide

NPM-10 (3595)

Troubleshooting - BB CC Technical Documentation

Flash Programming Does Not Work

The flash programming can only be done via the pads on the PWB (J100).

In case of flash failure in FLALI station, the problem is most likely related to SMD

problems. Possible failures could be short-circuit of balls under µBGAs (UEM, UPP,

FLASH), or missing or misaligned components.

In flash programming error cases, the flash prommer can give some information about a

fault. The fault information message 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).

Figure 3: Flash programming does not work

Flash programming

does not work

Error from prommer:

“Phone doesn’t set FBUS_TX

line low.”

J100, R108

Check connection between

pad 1, 2 and 3 on J100 and

R108

J409, J410, J411, J412

Voltage level at 1.8 VDC

Try reading MCU ID

with Phoenix:

Reading OK?

Try reading flash ID

with Phoenix:

Reading OK?

Yes

CHECK:

R108, PWB

CHECK:

PWB, else defective D200

CHECK:

PWB, else defective D400

CHECK:

Replace D450

Reflash the phone