Matrix Orbital GLK19264-7T-1U - Manual (Page 17)

NOTE The display module will revert back to the old settings once turned off, unless the
settings are saved.
2.6 Filesystem Lock Jumper
The Filesystem Lock Jumper allows you to lock the filesystem on the GLK19264-7T-1U so that no fonts
or bitmaps can be either written or deleted from the on board memory. This feature is useful in order to
protect data integrity of production units, if protection of other settings is required see Section 13
To lock the filesystem, solder a zero ohm resistor or use a solder jumper pictured in Figure ?? below.
Figure 20: Filesystem Lock Jumper for Non-USB
3 Troubleshooting
3.1 The display does not turn on when power is applied.
• First, you will want to make sure that you are using the correct power connector. Standard floppy drive
power cables from your PC power supply may fit on the Power/Data Connector however they do not
have the correct pinout as can be seen in Figure ??. Matrix Orbital supplies power cable adapters for
connecting to a PC, which can be found in the Accessories Section on page 1.
• The next step is to check the power cable which you are using for continuity. If you don’t have an
ohm meter, try using a different power cable, if this does not help try using a different power supply.
• The last step will be to check the Power / Data Connector on the GLK19264-7T-1U. If the Power
/ Data Connector has become loose, or you are unable to resolve the issue, please contact Matrix
Orbital see 16.6 on page 66 for contact information.
3.2 The display module is not communicating.
• First, check the communication cable for continuity. If you don’t have an ohm meter, try using a
different communication cable. If you are using a PC try using a different Com port.
Matrix Orbital GLK19264-7T-1U 12