Nokia RH-27 Series Technical Documentation Manual page 58

RH-27
Troubleshooting - Baseband
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.)
Page 58
Figure 17: GPS block diagram
©2003 Nokia Corporation
CCS Technical Documentation
Confidential Issue 1 11/2003