Heidelberg Speedmaster

This one was tricky one two engineers had a look, the tracing pointed to the matrix. After a lengthy checking process, turned there were multiple issues with this printer.

First issue was damaged resistor array.

Second Problem was a shorted circuit board.

Third issue found the problem was a 5V issue. Voltage was present, but no life on the machine. Found the problem was in the main wiring cabinet. Loose wire, even though the voltage was present it was unable to carry any current.

All faults found and success