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DA852X-UG02-608 Page 45 of 47
User Guide Release 2.0
DA852X E Ink Evaluation Kit
Display Controllers
8
Troubleshooting
8.1
Software issues
The USB device should install without difficulty automatically. Make sure that the installation finds and uses the driver
contained on the CD.
The software may require administrator privileges to install on the machine to be used.
If the software is started before the USB kit is plugged in, the program will prompt for Offline mode, which can be useful
to familiarise oneself with the software without the hardware attached.
The software is optimised for a display screen size of 1024 by 768 pixels or greater, with Fonts set to Normal (96dpi).
There have been reported issues of unpredictable display effects when large fonts (120dpi) are used. This can be
changed by right-clicking on the desktop, select Properties. Select the Settings tab, select Advanced, then Normal size
from the drop-down box.
If no image is present on the Image panel, perform the “Load Image” and “Load Map” operations again.
If the display does not change when a segment on the image is clicked, check that the “Update mode” button is set to
“Immediate”. Also check that the correct project is loaded. Does the number of segments match the PCB and display in
use?
8.2
Hardware Issues
To verify that the hardware is correctly communicating with the software, monitor signal “StandbyB” at the edge of the
board with a Digital Voltmeter or oscilloscope. This should switch high and low when the toggle switch “StandbyB” on
the “Parameter Control Panel” is toggled.
If signal V15_OUT is monitored, this will switch between 0v and 15v at the same time.
If no output is being produced, check that the jumpers are in the correct positions, see Figure 2. Especially check that the
Power Supply jumper JP1 is in the correct position.
It is important to align the display correctly onto the connector. Any misalignment can result in two outputs being shorted
together. When this happens, the 15v charge pump will be overloaded and fail to reach the correct voltage.
If possible, use a microscope or magnifying glass to perform the alignment, and a piece of “Magic Tape” or similar to hold
the display connector in position while the connector is being clamped.
If the display in use has multiple connectors, it is very likely that each connector has a connection to the Top Plane and
the Field connection. Any outputs driving these connectors are then effectively in parallel. It is vital that the Top Plane
connections box and the Field Connection box have the correct entries., e.g if outputs 95 and 191 are top_plane, and 94
and 190 are field connection, then the boxes should contain “95,191” and “94, 190” respectively.
