Gps Troubleshooting - Nokia 6235 Baseband Description And Troubleshooting

6235/6235i/6236i (RM-60)
Baseband Description and Troubleshooting
synchronize with the phone using the 19.2Mhz clock. The phone locates the closest
satellite and downloads the location coordinates to send them to the Emergency desk.

GPS Troubleshooting

When troubleshooting GPS, make these common checks (see
• Check the Power Vcore and VIO
• Check that GPS_RF_CLk = 19.2Mhz
• Check the GPS_EN_Reset
• Check that Sleep_CLK = 32.768kHz
• Check that VRF_GPS = 2.78
• Check that the GPS clock = 16.384Mhz
• Run Test Mode 1 on Phoenix
• Check USART activity
• Check SPI activity
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Figure 28: GPS Block Diagram
©2005 Nokia Corporation
Figure 29
Company Confidential
and Figure 30):
Issue 1 04/2005