Gps Hardware Examination Procedure - Asus P526 Service Manual

17. GPS Hardware Examination Procedure

The GPS examination procedure includes six parts. In the six parts, SiRFDemo PPC
program must be used. (Appendix A)
1. Start the SiRFDemoPPC program. Then, make sure that the GPS comport setting is
[Port:COM1][Baud
works or not.
1. Re-download the GPS firmware (as Appendix B) and then check if the GPS function or
works or not.
3. Active Path Fault Finding Chart
Put GSP active antenna into CON301 and then make
the active antenna near the window or open sky.(To
YES
The C/N0 value
(got by the
SiRFDemo) > 35
YES
Do 4. Passive Path
Fault Finding Chart
Rate:4800 or 57600]. After this step, check whether the GPS function
get the fine GPS signal)
NO
Make sureU315
Pin6:Low(<0.2V)
Pin4:High(>2.5V)
OK?
YES
Do as SiRF StarIII
Fault Finding Chart
GTC ■ Service Manual
Replace U315
NO
with a new one