User Manual
Table Of Contents
- Contact Us
- Copyrights
- Document History
- Contents
- List of Figures
- List of Tables
- About VML750 LTE Vehicular Subscriber Modem (VSM) Installation Guide
- VML750 Description
- VML750 Installation
- VML750 Troubleshooting Causes and Indicators
- VML750 Operation
- VLM750 Specifications
- LTE LMR Antennas Mounting Recommendations
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VML750 Troubleshooting Causes and Indicators
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Chapter 3
VML750 Troubleshooting Causes and
Indicators
Motorola has made every effort to ensure that this product is of excellent quality. However, if you
experience any problems with the VML750 LTE Vehicular Subscriber Modem (VSM), contact your
Motorola service representative with product-related information. For complete information on ordering
required parts and kits, contact your local customer service representative. See the “
Contact Us”
section and
FRU/FRE Kit/Part Number Kit Description.
VML750 Troubleshooting
This table gives details regarding possible malfunctions that may occur after first time installation of the
VML750 LTE Vehicular Subscriber Modem (VSM), their probable cause, and the recommended
corrective action. For correct LED indications, See
LED Indications.
IMPORTANT: Contact Motorola Solutions Support Center (SSC) team for further
troubleshooting assistance if necessary. For contact information, see the “
Contact Us” section.
Table 4 Troubleshooting the VML750
Malfunction Probable Cause Corrective Action
VML750 does not turn
On.
Power cable is not
properly connected.
Power button was not
properly pressed.
1
Check the cable connections; connect as
required and turn on the VML750.
2
Verify that the Power LED is blinking
red (standby mode).
3
Press the power button to turn on (expect LED
behavior according to ignition state).
1
Apply power to the modem.
2
Verify that the Power LED is blinking red.
3
Press the Power Button for 2 to 3 seconds.
4
Verify that the Power LED is blinking orange
(in "ignition enabled" mode), or blinking green
and then solid green (in "ignition disabled"
mode).
No LAN/Ethernet
connection.
LAN/Ethernet cable is
not connected, or, Micro
USB cable is not
connected.
Connect the LAN/Ethernet cable (See
Installing
the LAN/Ethernet Cable) or the Micro USB cable
(See
Installing the Micro USB Cable) and verify
that the LAN LED is green.
No GPS reception. GPS cable (from Main
antenna) is not connect-
ed.
1
Connect the GPS cable (See Installing
Antenna Cables).
Table continued…