Motorola Mototrbo - Page 68

1-8 GNSS (PMLN7252_S) Troubleshooting Chart
3.1 GNSS (PMLN7252_S)Troubleshooting Chart (Sheet 2 of 3)
A
Constant 5V
antenna bias
present ?
Is 5V
present on
center pin
of J7101??
No
Is 5V at
TP7100?
No
Refer to mobile
radio Controller/DC
troubleshooting for
5V supply rail
Yes
No
Check 1.8V and 3.6V
DC supplies
Yes
Replace GNSS
coaxial cable
Replace L7101
Yes
Is 1.8V
present
on
TP7113?
Yes
Is 0V
present
on
TP7118?
No
Refer to mobile
radio Controller/DC
troubleshooting for
1.8V supply rail
Probe GNSS_EN
at TP7118
Testpoint should be HIGH.
Reboot radio and refer to
mobile radio Controller
troubleshooting if
necessary
A