I reckoned it would only be fitting that my TT030 receives all the rework procedures I had recently created visual guides for. I'm very happy and relieved to have done it all successfully. I also did a highly experimental "Poly-Mod" that I will outline at the end.

Essentially, with these fixes, my early REV.C (C301763-001 REV A) is now a REV.K.

I am not responsible for any problems or damage caused by these procedures. Attempt them at your own risk.

Rework Done

REV.C Rework Overview

RTC Fix

Very straightforward. Nothing much to comment here. I haven't received my frequency counter yet so once I do I will adjust it. Frequency counters are very cheap and found from all usual sources.

VME Fix

I removed the 74ALS30 and soldered a socket in its place. I inserted the 7430 as pictured with pin 8 bent up. I shortened one end of the resistor and inserted it into the socket, which was a snug fit. The other end was soldered to pin 8 as pictured.

U703 was conveniently socketed already so I simply removed it, bent pins 17,18, and 19 as pictured and re-inserted it. I replaced U705 74LS244 with a socket and inserted a 74F244 in its place.

VME Bus Fix along with other fixes.

Rework Procedure 3

I love soldering. So this is U206. I cut the trace higher up right next to the via. Hot snot is recommended.