DP770 Service Manual
5 GPS cannot locate your position.
A. Check whether the antenna is GPS+UHF dual band or not. If not, use a GPS+UHF dual band antenna to replace the old one.
B. Check whether the GPS setting is correct or not. If not, set it correctly.
C. Maybe there is some other RF interference around the radio’s place. Go to an open sky place and try again.
6
CPS programming failed.
A．Connection between the radio and PC is not good enough. Check and try again.
B．Earphone interface board has poor contact with external programming cable. If so, change the Earphone interface board.
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