Chronologically
Ordered
Note - an example of a Flxible Transit Bus, similar to the prototype vehicles used in R&D. |
Lucent
Technologies (then Celestica)
Engineering
Support for 90+ Data Networking Circuit Packs and 8 Functional Test
Sets. Responsible
for IMI's, TEDR's, Software Loads, Troubleshooting Documentation and
Lab. Configured,
Improved, Enhanced Test Sets for New and Current Product.
Many of
these circuit packs were loaded with complicated IC's, and
troubleshooting proved challenging. The tools used to
diagnose
defective circuit packs included two working functional test sets (one
Datakit and one BNS) setup in a lab, as well as the eight working
functional test
sets used for production testing by union associates with Inspection
Method Instructions (IMI's) written and controlled by test
engineering. With
testing commands written by Bell Labs folks, we were able to
troubleshoot, diagnose and repair many of the problems
encountered. An HP digital oscilloscope was used for single
as
well as multiple I/O line capture as an aid to the troubleshooting
process. Many of the schematics used during the
troubleshooting
process were multi-page documents. I instituted a database
collection system for defective
circuit packs that could be easily sorted when searching through
similar defects from previous findings, to not only help the current
troubleshooting operator or engineer, but also folks new to the
troubleshooting
lab. Environmental
chambers were used to
cycle the temperature up and down some specified number of times as a
means of weeding out weak solder connections before going to
in-circuit, functional
and system test. On other product lines, an X-ray machine was
used to detect the amount
and presence of properly reflowed solder connections. Refer to the X-ray section below as I was fortunate to receive training on this machine, as well as using it in detail.
Developed Unique Sub-typing Method Aimed at Simplifying and Reducing the Development Process
Wrote
Small macros
and Worked with Visual SlickEdit
to Perform CAD Data File
Manipulations