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Example documentationExample: How Visual Test and Repair Works

 

There is a test failure for a PCA board. The failure must be analyzed and the cause logged as a defect. The appropriate disposition for the defect must then be determined and logged.

Prerequisites

  • Material ACME_PCB_3451 is a PCA board with an associated ECAD model (GRDemo.gcm).

  • The ECAD model contains components, routes and test points.

  • Operation PCB_TEST_ANALYZE_REPAIR is being performed at resource PCB_STATION.

  • A PCA board with SFC number ACME-3451-000004 is to be processed at this operation.

  • In NC Client Maintenance, you have selected the Can Log Primary NC Code and Log Secondary NC Code checkboxes to ensure logging of all three types of NC codes.

Procedure

To log test failure, proceed as follows:

  1. Open the default VTR POD (POD – Visual Test and Repair).

  2. Enter operation PCB_TEST_ANALYZE_REPAIR and resource PCB_STATION.

  3. Enter SFC number ACME-3451-000004 in the SFC field and start it.

    External event: test P358 fails at the bottom left test point with failure code F1-22.

  4. Choose the FAIL NC code in NC Selection (displays fields in NC Data Entry).

  5. Enter Test P358 failed with failure code F1-22 in the Comments filed in the NC Data Entry plug-in.

  6. Choose the Flip Board icon on the right-hand toolbar in the Model Viewer (test points are on the bottom of the board).

  7. Pan and zoom the image in the viewport to clearly show the bottom left test point.

  8. Double-click on the bottom left test point. It highlights, centers and zooms the test point in the viewport and automatically displays 203, the RefDes value from the test point, in the Ref Des field in the NC Data Entry plug-in.

  9. Choose the Add button in the NC Data Entry plug-in. It logs the FAIL NC code and deselects the test point in the viewport.

To analyze and log defect, proceed as follows:

  1. Choose the NC Tree button in the POD. NC Data Tree opens.

  2. Choose the row in the NC tree and choose the Return to POD button. It highlights, centers and zooms test point 203 and displays the secondary NC code groups and codes in NC Selection.

  3. Double-click on the route connected to test point 203 in the viewport. It highlights, centers and zooms the selected route, which shows multiple segments.

  4. Visually follow the route UN168HC1190PMODB to the first component WT5.

  5. Examination and test of component WT5 finds no defect. Flip the board by choosing the Flip Board icon on the right-hand toolbar (next segment of the route is on the top of the board) and pan the image in the viewport to find the next segment of the route.

    Alternatively, you can choose the Elements icon on the left-hand toolbar; double-click on component WT5 in the Elements list; and then double-click on the route connected to that component.

  6. Visually follow the route UN168HC1190PMODB to the next component C1.

  7. Examination and test of component C1 finds that the component has a bent lead that is not making contact. Choose the COMPONENT NC group and the LEAD-BENT NC code in NC Data Entry.

  8. Choose component C1 in the viewport. It highlights component C1 in the viewport and adds C1 in the Ref Des field and 4399-3047-00 in the Component field in NC Data Entry.

  9. Choose the Add button in the NC Data Entry plug-in. It logs the LEAD-BENT NC code and deselects component C1 in the viewport.

To log repair, proceed as follows:

  1. After component C1 has been removed, repaired and reinstalled on the board, choose the NC Tree button in the POD to display the NC tree in a pop-up screen.

  2. Choose the row in the NC Data Tree with the LEAD-BENT NC code and choose the Return to POD button. It highlights, centers and zooms component C1 and displays the REPAIRACTION NC code group and codes in NC Selection.

  3. Choose the DONE NC code in NC Selection. It displays DONE in the NC Code field in NC Data Entry.

  4. Choose the Add button in NC Data Entry. It logs the DONE code, deselects component C1 in the viewport and changes the NC state of the logged FAIL, LEAD-BENT, and DONE NC codes to Closed.

The figure below provides a high level flow of the VTR test, analysis and repair example:

Recommendation Recommendation

We recommend that you add a Comment field to the data type for the DONE NC code to enable the user to enter a comment regarding the specifics of the repair or the condition of the component.

End of the recommendation.