User's Manual

GV75WUserManual  
TRACGV75WUM001 ‐15‐
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.