16 Ko Ram pack common failure ?

[amauget]

A small update.

SUCCESS !
After soldering back all the 4116 & LS157 chips and fixing the A6 line, one of my rampacks has come back to life.

I'm verifying all the connections of the second one before unsolder all the chips for testing purpose.

[sirmorris]

Congratulations

[Andy Rea]

Whooey Well done you.

Andy

[amauget]

Hi to all,

A very small update. All the connections are okay on my second Rampack.
I don't give up... desoldering time !

[sirmorris]

I love the smell of no-clean in the morning

[1024MAK]

I love the smell of no-clean in the morning

Yes but sometimes you can have too much of a good thing, so I use a fan
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Mind, I run the brush-less (the fan that is, and a 12 volt one at that) at a smooth 5 volts for a cleaner finish, sorry sound....
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Note to site admin, do we not have a strike-through text option

Strikethrough.png (13.26 KiB) Viewed 8027 times

Mark

[RWAP]

Note to site admin, do we not have a strike-through text option
Mark

Thanks for the suggestion - we do now

strikethrough added

[1024MAK]

Thanks Rich

If you do find that the Sinclair ULA is toast (gone to silicone heaven), I have now worked out how some of the other non-Sinclair designs of RAM packs use standard 74LS TTL chips to interface DRAM chips. So if anyone wants this info, just ask.

Mark

[PokeMon]

I like the smell of soldering, too.

[1024MAK]

If you do find that the Sinclair ULA is toast (gone to silicone heaven), I have now worked out how some of the other non-Sinclair designs of RAM packs use standard 74LS TTL chips to interface DRAM chips. So if anyone wants this info, just ask.

As I have been asked, here it is in a new thread

Mark