User Manual

• Second, please ensure that the display module is set to communicate on the protocol that you are

using, by checking the Protocol Select Jumpers. To change the protocol used by the display module

see Section 2.4 on page 10.

• Third, ensure that the host system and display module are both communicating on the same baud rate.

The default baud rate for the display module is 19200 bps.

• If you are communicating to the display via I

C please ensure that the data is being sent to the correct

address. The default slave address for the display module is 0x50.

NOTE I

C communication will always require pull up resistors.

• Finally, you may reset the display to it’s default settings using the Manual Override Key, see Sec-

tion 2.5 on page 11.

3.3 The display module is communicating, however text cannot

be displayed.

• The cause of this is often that no font has been loaded onto the display. To load a font onto the display

see Section 4.2.1 on page 16.

• Another common cause may be that the contrast settings have been set to low. The solution to this

problem is to adjust the contrast settings, the default setting that will work in most environments is

128

NOTE Optimal contrast settings may vary according to factors such as temperature, view-

ing angle and lighting conditions.

3.4 There is a problem uploading fonts or bitmaps.

• First, ensure that you can communicate to the display. A good test is to use a PC, with MOGD#

installed, to connect to the display. See Section 1.4 on page 4for setting up a PC to test the GLK19264-

7T-1U.

• Second, ensure that the Filesystem Lock Jumper has not been jumpered. See Section 2.6 on the

previous page.

• Third, please ensure that the display module’s memory is not full. The GLK19264-7T-1U has 16 Kb

of memory for fonts and bitmaps.

NOTE If you are unable to resolve any issue please contact Matrix Orbital. See 16.6 on

page 66 for contact information.

Matrix Orbital GLK19264-7T-1U 13