CCS Technical Documentation
Troubleshooting - Baseband
RH-34
Issue 1 11/2003 Confidential
©
2003
Nokia Corporation
Page 51
Figure 11: GPS block diagram
The basic GPS BB troubleshooting method is to put the GE and CE in the proper mode,
then check to make sure that necessary inputs from the CE are good (power, clock, etc.).
Then, ensure that these inputs produce the proper outputs. Because of the large level of
integration (most functionality is contained in the two ASIC chips), the amount of diag-
nostics one is able to do is limited.
Prior to performing diagnostics, perform a visual inspection on the GPS circuitry to see if
the problem is physical (dislodged parts, corrosion, poor solder joints, etc.)
