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Products => Test Equipment => Topic started by: scopeman on February 28, 2022, 05:07:18 am

Title: Anyone with a working HP54602A that could give me a dump o U75?
Post by: scopeman on February 28, 2022, 05:07:18 am

I have a HP54602A 150MHz DSO (not the B) where U75 has gone flat. Would some kind soul please give me a binary or hex dump of U75 the DS1220AB (can be read as a DS1225 with a MiniPRO programmer. If this part goes flat the scope is toast.

Thanks!

Sam

P.S. These parts can be replaced with M48Z18-100PC1 available from Mouser. And will extend the life of the scope another 20 years. You have to desolder the part from the board and replace it with a 28 pin socket. If you have one of the 54600 series scopes it is a great idea to take the part off the board and make a backup of the data before it is too late. Unfortunately I forgot that I had this scope and when I powered it up it was brain dead! All FF's in U75! I hate these lithium backed SRAMS! So I am now backing up my HP54645D's ASAP!