The HM652 may be in an unfavorable position. For
example, the signal may be blocked by high-rise
buildings or frustrated in the underground areas.
1. Move to an open and flat area.
2. Restart the HM652.
The HM652 may suffer from external disturbance
(such as electromagnetic interference).
Stay away from the equipment that
may cause interference.
The keys are
unavailable.
The keypad may not work temporarily.
Restart the HM652.
The GPS cannot locate
your position.
The GPS module is not properly connected.
Reconnect the GPS module.
The HM652 may be at an unfavorable position, so
no GPS signal is received.
Move to an open and flat area, and
try again.
If the above solutions cannot solve your problems, or you may have some other queries, please contact us or your local
dealer for more technical support.
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