Hytera DMR - Care and Cleaning; Radio Care and Cleaning Procedures

Service Manual
8.4 Troubleshooting Flow Chart
Start
Antenna
works
normally?
No
Yes
Yes
No
The radio can position
normally?
`
Yes
Replace
defective
components.
No
Yes
The PC-based
software (e.g.SiRF
Demo) shows GPS
communication?
Yes
Replace U901.
Check R368 and
R370.
Check UART.
Yes
Yes
No
Replace the
GPS
module.
Active antenna is
damaged?
Replace
connector
W321.
No
U901 outputs 3.3V
normally?
Connector works
normally?
RX signal is
weak?
Peripheral
components work
normally?
Replace the active
antenna.
Yes
Replace the
antenna.
No
22