UK Vintage Radio Repair and Restoration Discussion Forum - View Single Post - HP 8552A / 8554L Spectrum Analyzer help request

factory · 12th Dec 2020, 11:34 pm

Make sure you have the correct manuals for the serial prefix of the modules & display unit, HP often made design changes over the years.

I don't know which display mainframe you have, but power supply faults are one of the common failures with them, I've got an early 141T here that has had a complete replacement (much later) PSU board when it was serviced by HP at some point in it's life, so that will be extra confusing when I get round to looking at it. I also have a 141S & another 141T that are working.

David

12th Dec 2020, 11:34 pm	#4
factory Octode Join Date: Jul 2009 Location: Cheshire, UK. Posts: 1,737	Re: HP 8552A / 8554L Spectrum Analyzer help request Make sure you have the correct manuals for the serial prefix of the modules & display unit, HP often made design changes over the years. I don't know which display mainframe you have, but power supply faults are one of the common failures with them, I've got an early 141T here that has had a complete replacement (much later) PSU board when it was serviced by HP at some point in it's life, so that will be extra confusing when I get round to looking at it. I also have a 141S & another 141T that are working. David