Blank project

by digitalrefresh | Jul 22, 2026

Enhancing SUH Box Reliability on the Class 390 Fleet

by digitalrefresh | Oct 21, 2025

Enhancing SUH Box Reliability on the Class 390 Fleet Project Summary  Repaired and tested 60+ Class 390 SUH Boxes – helping Alstom replenish float stock and reduce fleet downtime.  Identified and resolved key failure causes – including water ingress and...

Obsolescence-Resilient Repair of Electrostar Fleet DCUs

by digitalrefresh | Apr 25, 2025

Obsolescence-Resilient Repair of Electrostar Fleet DCUs Project Summary  383 obsolete Electrostar Door Control Units (DCUs) repaired in 2024 – extending asset life and avoiding costly fleet-wide replacement.  Developed a bespoke automated test system –...

Jubilee Line trains nine-year overhaul project

by digitalrefresh | Mar 27, 2023

Jubilee Line trains nine-year overhaul project Overview and objectives TP Matrix is supporting Alstom with its nine-year overhaul of the 63 trains that serve the Jubilee Line. Our involvement in the overhaul is set to run until September 2024. The main objectives are...

Resolving Thermal Incidents in Door Control Units (DCUs)

by digitalrefresh | Feb 28, 2023

Resolving Thermal Incidents in Door Control Units (DCUs) Project Summary  Identified and eliminated the root cause of DCU thermal incidents – preventing overheating, smoke release and door operation failures.  Designed and deployed a new power supply unit...