Motorola Mototrbo - Page 69

GNSS (PMLN7252_S) Troubleshooting Chart 1-9
3.2 GNSS (PMLN7252_S) Troubleshooting Chart (Sheet 3 of 3)
A
Any clock on
TP7122?
Probe clock on
GNSS_I2C_SCL
Check for activity on
GNSS_I2C_SDA
Yes
No
Reboot radio and
refer to mobile radio
Controller
troubleshooting if
necessary
Any data on
TP7121?
Yes
No
Use oscilloscope to
check 26MHz clock
output on pin 3 of
Y8302_3
Replace FL7102
Able to get
position fix?
GNSS Working
Replace
Bluetooth/Wifi/GNSS
Bluetooth/Wifi/GNSS
Board
26MHz
present?
Replace Y8302_3 and
retest
No
Reboot radio and refer to
mobile radio Controller
troubleshooting if necessary
If troubleshooting
unsuccessful, replace
Expansion Board.