FAQs
4.3 Controller PCB card step-by-step integration
- The controller PCB card is designed to be integrated into the rear of the LCD panel
housing which the touchscreen sensor is used in conjunction with.
- When selecting a place for the controller to be integrated within the rear of the LCD panel
housing, please ensure the following:
o The controller PCB card is located as far away as possible from sources of noise
(i.e. transformers, AC sources, motors, backlight inverters, etc) to minimise EMI
interference with the controller PCB card and its operation.
o Ensure that all cables used to connect to the controller and that are used within
the system are shielded.
o The controller needs to be connected to chassis ground of the system via its four
corner mounting holes.
o The sensor is connected to the controller PCB card via the on board 34-way ZIF
connected located on the opposite edge to the Serial and USB connection ports.
The integrator needs to ensure this connector is accessible to allow the sensor flexi
tail to be easily connected to the PCB without the need for folding or bending of
the sensor flexi tail.
- To mount the controller, the integrator will need four M3 screws and four
compression/star washers to connect to the four controller corner location holes to the
chassis of the LCD back plate. Ensure the screws and washers selected do not touch or
short out with the near by components located next to each of the four controller PCB
corner mounting holes.
- The controller MUST be spaced of the rear metal back plate of the LCD panel by using four
metal stand-off posts. These stand-off posts need to space the controller card off any
metal back plate in all four corners by at least 5 mm.
- Locate the controller in its desired mounting position using the four stand-off posts. Use
the four M3 screws and washers to connect the four PCB corner mounting holes to the
LCD metal back plate, as shown in Figure 7. Take care not to short out any of the on
board components near the mounting holes and ensure the PCB controller card is not
shorted out on the LCD back plate.
- If in some integration scenarios there is no metal back plate to ground the controller to
chassis ground then an external flying grounded braid lead must be used to connect at
least one of the Controller PCB mounting holes to the nearest chassis ground potential, as
shown in Figure 8. Ensure that the flying grounding lead is kept as short as possible.
- A good chassis ground connection to the controller is important to establish stable
operation.
5 Disclaimer
All information has been generated under careful circumstances and detailed checks. Should
there nevertheless be any wrong information we have to except every liability.
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