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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Summary of Contents for DP770
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Page 70: ...DP770 Service Manual Appendix Figure 1 DP770 UHF Main Board Top Side PCB View Page 69 of 102 ...
Page 72: ...DP770 Service Manual Appendix Figure 3 DP770 UHF Keypad Top Side PCB View Page 71 of 102 ...
Page 73: ...DP770 Service Manual Appendix Figure 4 DP770 UHF Keypad Bottom Side PCB View Page 72 of 102 ...
Page 87: ...DP770 Service Manual Appendix Figure 7 DP770 VHF Main Board Top Side PCB View Page 86 of 102 ...
Page 89: ...DP770 Service Manual Appendix Figure 9 DP770 VHF Keypad Top Side PCB View Page 88 of 102 ...
Page 90: ...DP770 Service Manual Appendix Figure 10 DP770 VHF Keypad Bottom Side PCB View Page 89 of 102 ...
