Hi, I recently acquired a TK-80A board via Ebay. A label on the back of the board seems to indicate that it was part of a Fluke 9010A training set, as referenced in the 'Introductory Training' manual. The EPROM on my board did not work properly. But a friend from Japan sent me the original content of the EPROM. Now the board is working again and I get the signature F77C for the ROM as mentioned in the training manual. I can provide some pictures if somebody is interested. Best Manfred _______________________________________________ Techtoolslist mailing list Techtoolslist@flippers.com https://pairlist7.pair.net/mailman/listinfo/techtoolslist FTP site is: ftp://ftp.flippers.com/TTL/TestEquipment Archive site 2005-Current: https://seven.pairlist.net/pipermail/techtoolslist/ Vectorlist Archives 1997/99 - 2016: https://www.vectorlist.org/