A new customer called to have me take a look at an HP LaserJet M5025/39 printer that was donated to their not-for-profit company. The machine had been sitting for several years and when they turned it on they found that the copier function would not work. After debating long and hard they decided to spend a little money and have it looked at to see if it could be salvaged.
I arrived on site to take a look at the machine. When it finally warmed up I attempted to make a copy and got nothing back but a black copy. When I opened the lid to make a copy it was apparent the lamp was not working. I printed a config page and error log report to check the firmware and past errors recorded. Sure enough, it was reporting a 30.1.19 Scanner Error. I ran the scanner lamp test in the diagnostic menu which didn’t yield any different results. I reseated all the connectors on the scanner board PCB and visually inspected the optical scanner unit for signs of failure. Afterwards, I tried turning the machine back on and this time the displayed came up with the scan and copy functions grayed out and the 30.1.19 error came up when I tried to make a copy.
At this point it was time to replace some parts. The service manual points to replacing the optical scanner unit or the entire scanner assembly. My thinking behind the logic was that either the optical scanner assembly had failed or the scanner board PCB in the back of the unit had failed. After looking up the parts and getting pricing it was a lot cheaper to buy a scanner assembly than buy the parts individually. Plus, it takes a lot less time to replace the whole unit compared to the parts.
Q7829-60185 – SCANNER ASSEMBLY, M5025, M5039
I replaced the whole scanner assembly the next day. I ran the scanner calibration and the machine was back up and running. The machine only had 15,000 prints and copies on it, so that not-for-profit company got a slightly used machine at a very low price. Makes me wonder, who would discard such a great machine with a minor fix compared to the value of the machine.
Kevin Gumpp is a certified printer technician and freelance writer for Market Point. Market Point is a HP PartsOne Partner selling HP printer parts. If you have a question regarding this topic or have any other printer repair related questions or topics for which you would like more information, please send an email to firstname.lastname@example.org.