Asus P526, Руководство по обслуживанию

Страница: 94 / 113

GTC
■
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 Rate: 4800 or 57600 ]. After this step, check whether the GPS function
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
get the fine GPS signal)
Make sureU315
Pin6:Low(<0.2V)
Pin4:High(>2.5V)
OK?
The C/N0 value
(got by the
SiRFDemo) > 35
NO
NO
Replace U315
with a new one
Do 4. Passive Path
Fault Finding Chart
YES
Do as SiRF StarIII
Fault Finding Chart
YES
YES