Replacement RAM chips for QL
Posted: Thu May 13, 2021 7:56 pm
Hi there, I am looking for replacement TMS4164A-15NL ram chips as I have just got another QL and it's faulty as the screen just displays a white screen - I did swap the JS ROMS for the excellent Minerva ROM from my other QL (kindly supplied by the always helpful chr$), and the RAM test revealed the faulty address - which the Minerva fault code RAM decoder tells me is IC7.
I am wondering if anyone on the forum is able to supply these chips (would perhaps like 4 or 5 to keep some as spares) or a compatible alternative, and could anyone recommend a good but not too expensive vacuum desoldering iron for this job. I've not replaced any chips like this before but I'm resolved to give it a go . And would you recommend fitting a socket rather than fitting the chip straight to the board?
I realise there's a few questions there but any help and advice would be much appreciated. Many thanks
I am wondering if anyone on the forum is able to supply these chips (would perhaps like 4 or 5 to keep some as spares) or a compatible alternative, and could anyone recommend a good but not too expensive vacuum desoldering iron for this job. I've not replaced any chips like this before but I'm resolved to give it a go . And would you recommend fitting a socket rather than fitting the chip straight to the board?
I realise there's a few questions there but any help and advice would be much appreciated. Many thanks