GV75W User Manual
TRACGV75WUM001
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4.
Troubleshooting and Safety Info
4.1.
Troubleshooting
Trouble
Possible Reason
Solution
After GV75W is
turned on, the CEL
LED always flashes
quickly.
The SIM card is not inserted.
Please insert the SIM card into
GV75W.
The signal is too weak; GV75W can’t
register to the network.
Please move GV75W into places
with good GSM coverage.
The SIM card is PIN locked.
Use SIM card without SIM PIN, or
unlock SIM PIN.
Messages can’t be
reported to the
backend server by
GPRS.
The SIM card in GV75W doesn’t
support GPRS.
Try a GPRS supporting SIM card.
APN is wrong. Some APNs cannot visit
the Internet directly.
Ask the network operator for the
right APN.
The IP address or port of the backend
server is wrong.
Make sure the IP address for the
backend server is an identified
address on the Internet.
GV75W
doesn’t
power off.
The function of power key is disabled
by
AT+GTSFR
.
Enable the function of power key by
AT+GTFKS
.
GV75W can’t get
successful GPS fix.
The GPS signal is weak.
Please move GV75W to a place with
open sky.
It is better to let the top surface face
the sky.
4.2.
Safety Info
Please do not disassemble the device by yourself.
Please do not put the device in an overheated or too humid place, and avoid exposure to
direct sunlight. Too high temperature will damage the device or even cause battery
explosion.
Please do not use GV75W on an airplane or near medical equipment.
WARNING:
This device complies with part 15 of the FCC Rules. Operation is subject to the following two
conditions:
This device may not cause harmful interference, and
This device must accept any interference received, including interference that may cause
undesired operation.Changes or modifications not expressly approved by the party
responsible for compliance could void the user’s authority to operate the equipment.
