User Guide

CCS Technical Documentation Baseband Troubleshooting Instructions
RH-12/RH-28
Issue 1 02/04 Nokia Corporation Page 7
Flash programming doesn’t work
The flash programming on RH-12/RH-28 boards is only possible via the pads on the PWB.
In case of Flash failure in production (FLALI station), problem is most likely related to
SMD problems. Possible failures could be Short-circuiting of balls under µBGAs (e.g.
UEME, TIKUEDGE, SDRAM, FLASH), missing or misaligned components.
In flash programming error cases the flash prommer (via Phoenix or Darium) can give
some information about the fault. The fault information messages could be:
• Phone doesn't set Flashbus TXD line high after VCC is switch on.
• External RAM test failed.
These errors are some of the most common errors and based on this, a fault finding dia-
gram for flash programming is shown below. Various errors can appear from the prom-
mer when flashing the phone - not all of them can be directly linked to the HW or phone.
Because of the use of uBGA components, it is not possible to verify on the diagram, if
there is a short circuit in control and address/data lines on TIKUEDGE, NOR flash, NAND
flash or SDRAM.
Figure 2: Flash programming does not work
Flash programming does not work
Prommer information is:
Phone dose not set Flashbus TXD line high after VCC is switched on.
Check J386 - resistor R397/R396
Connections ok ?
Re-solder \ Replace componet
Replace UEME or TIKU
Replace NOR or NAND flash
Try reading MCU ID with Phoenix
Reading OK ?
Try reading flash ID with Phoenix
Reading OK ?
Flash again
Yes
Yes
Yes
Yes
No
No
No
Prommer information is:
External RAM test failed. (C108)
Check SDRAM orientation and placement.
Placement OK ?
Yes
Replace the SDRAM
Yes
Re-solder \ Replace componet
No
Check PWB (if possible) and power lines.
Connections OK ?
Fix the connections if possible.
Else scarp the phone.
Yes
No
Flash again
Yes