Success - (short lived ?)
I cut a couple of small squares of sewing/habberdashers/miliners felt,
intending to lay both on the B&W cleaning tank but unpowered moving the
carrier across, one transferred and landed neatly on the RYB (not RGB of
coarse) tank so left as is. Placed half a drinking straw of ammonia solution
on each piece of felt, moved the carrier fully to the right to engage the
tanks uplift mechanism and left overnight.

Bit of a puddle of ink in the base this morning but on running the ROM dump
print test all is working fine except two jets on the black delivery - I can
live with that.
Had been in a loft for over 3 years.

--
Diverse Devices, Southampton, England
electronic hints and repair briefs , schematics/manuals list on
http://home.graffiti.net/diverse:graffiti.net/