Hello Andrew.
Here is the link to our web-site eesdr.com/en/products-en/transceivers-en/sunsdr2dx-en#repair-manuals

Thanks, Roman!

My serial number is EED06521900169 so, perhaps my revision boards do not require the listed mods?
If you could please confirm I would really appreciate it?

Best Regards
Andrew Albinson
VK6IA

Andrew,
Your SS2DX is from the 2nd batch, it requires all these mods, as per the suggestion:
Applicable for serial numbers EED064219XXXXX, EED065119XXXXX

Thanks for the clarification Roman!

Best 73
Andrew
VK6IA
York, near Perth, Western Australia