XO 4 Touch Testing

This page describes the production test support provided with the touchscreen in XO-4.

Test routines are provided in Open Firmware for testing the various components of the touchscreen system, at various stages of manufacture.

IR PCB SMT

This test is done to bare IR PCB boards, without a light guide. The code runs on XO-4 A2 or later motherboards.

The idea is to check for opens and shorts of the IR diodes and detectors, as well as proper mounting of the ASIC and connector on the IR PCB.

There should be no operator interaction with the IR PCB. They should simply be able to drop a board into the test fixture, press a button on the keyboard, and the screen says pass or fail with an appropriate background (red/green).

After testing is complete, the MSP430 should probably be placed into reset to allow for cable disconnect. It should be rebooted for each test.

IR PCB ASSY

This test is done to IR PCB assemblies, including a light guide and bezel. The code runs on XO-4 A2 or later motherboards.

The idea is to check for proper assembly of the lightguide and IR PCB, as well as proper lightguide and IR PCB operation.

There should be no operator interaction with the IR PCB. They should simply be able to drop a board into the test fixture, press a button on the keyboard, and the screen says pass or fail with an appropriate background (red/green).

After testing is complete, the MSP430 should probably be placed into reset to allow for cable disconnect. It should be rebooted for each test.