2.6 Filesystem Lock Jumper
The File System Lock Jumper allows you to lock the file system on the GLK24064-25 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 12.1.
To lock the file system, solder a zero ohm resistor or use a solder jumper on the Filesystem Lock Jumper
pictured in figure 19 below.
Figure 19: File System Lock Jumper
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 pin-out as can be seen in figure 9 on page 6. Matrix Orbital supplies power cable
adapters for connecting to a PC, which can be found in the Accessories Section on page 2.
• 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 GLK24064-25. If the Power / Data
Connector has become loose, or you are unable to resolve the issue, please contact Matrix Orbital
see 15.5 on page 61 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 GLK24064-25 13
