background image

GV75MG User Manual 

7. Troubleshooting and Safety Info

7.1.

 

Troubleshooting 

Table 11.

 

GV75MG Troubleshooting List 

Problem 

Possible Reason 

Solution 

After the device is turned 
on, the CEL LED always 
flashes quickly. 

The signal is too weak. The 
device isn’t registered to the 
network. 

Move the device to a place with 
good network coverage. 

Messages can’t be reported 
to the backend server by 
network. 

APN is not right.

 

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 in the internet. 

There is no response from 
UART when the device is 
configured by using UART. 

The port is not ready or the 
device is not powered on. 

Please check the port and the 
device to ensure they are 
working properly. 

The device can’t get GPS 
fix. 

The GPS signal is weak. 

Move the device to a place 
under open sky. 

It is better to make the side 

with antenna face the sky. 

 

7.2.

 

Safety Info

Do not disassemble the device by yourself.

Do not put the device in over heated too humid place, and avoid exposure to direct sunlight.
Too high temperature will damage the device or even cause battery explosion.

Do not use the device on the airplane or near medical equipment.

QSZTRACGV75MGUM0101  

  12 

Queclink 
Confidential

Summary of Contents for GV75MG

Page 1: ...GV75MG User Manual QSZTRACGV75MGUM0101 GV75MG User Manual EGPRS LTE Cat M1 LTE Cat NB1 GNSS Tracker QSZTRACGV75MGUM0101 Version 1 01...

Page 2: ...validation of this product designed by Queclink within a larger electronic system remains the responsibility of the customer or the customer s system integrator All specifications supplied herein are...

Page 3: ...rface Definition 5 4 Device Cable Color 6 5 Getting Started 7 5 1 Opening and Closing the Casing 7 5 2 Installing a SIM Card 7 5 3 Power Supply Connection 8 5 4 Ignition Detection 8 5 5 Digital Input...

Page 4: ...r Manual 0 Revision History Version Date Author Description of change 1 00 2019 09 05 Heymi Lin Initial Version 1 01 2019 11 11 Heymi Lin Modified Table 4 and Table 5 QSZTRACGV75MGUM0101 1 Queclink Co...

Page 5: ...variety of reports including emergency alarm geo fence boundary crossings as well as external power supply monitoring and position reports 1 1 GV75MG Series Products Table 1 GV75MG Products Model No...

Page 6: ...device has been registered on GSM network Slow flashing SIM card needs pin code to unlock ON GPS Blue GPS chip is powered off OFF GPS sends no data or data format error occurs Slow flashing GPS chip...

Page 7: ...hing intervals are about 100ms ON 200ms OFF 2 Slow flashing intervals are about 200ms ON 1000ms OFF 2 3 Parts List Table 5 GV75MG Series Parts List Name Picture Description GV75MG Locator 102mm 46mm 2...

Page 8: ...re shown in the following figure Figure 3 8 pin Connector of the GV75MG Table 6 Description of 8 pin Connections Index Description Comment 1 RXD UART RXD RS232 2 TXD UART TXD RS232 3 OUT1 Digital outp...

Page 9: ...Cable Color Table 7 GV75MG Device Cable Color Definition Definition Color Pin No Cable RXD Gray 1 TXD Violet 2 OUT1 Blue 3 OUT2 Green 4 IGN White 5 IN1 Yellow 6 GND Black 7 VIN Red 8 QSZTRACGV75MGUM0...

Page 10: ...ver To open close Loosen or fasten the screws to open or to close 5 2 Installing a SIM Card Install the SIM card into the holder when power is off as shown blow Take care to align the cut mark and the...

Page 11: ...to find a non permanent power source that is only available when the vehicle is running For example the power source for the FM radio IGN signal can be configured to transmit information to the backen...

Page 12: ...150mA max with latch The electrical conditions are Table 10 Electrical Characteristics of Digital Outputs Logical State Electrical State Enable 1 5V drive current is 150mA Disable Open or the pull up...

Page 13: ...se note that the UART interfaces are all of RS232 level For RS232 valid signal levels are 3V to 15V and 3V to 15V and the 3V to 3V is not a valid level 3V to 15V corresponds to logic 0 of RS232 level...

Page 14: ...eliable surface to prevent falling off Make the side with antenna face sky to have better signal reception Do not install the device under metal surface or in enclosed environments having difficulty i...

Page 15: ...kend server is an identified address in the internet There is no response from UART when the device is configured by using UART The port is not ready or the device is not powered on Please check the p...

Page 16: ...GV75MG User Manual 8 Appendix Supported Accessories Currently no external accessory is supported QSZTRACGV75MGUM0101 13 Queclink Confidential...

Reviews: