Given all the dust I saw at the cooling fan I decided to clean the various logic boards as well. This is 1980s stuff, so tons of TTL which tends to dissipate the odd Watt or 2.
It is driven by a 8088 and a Z80, you will notice them on the attached pictures, along with a ton of UV-EPROMs.
It has a nice hinged card cage, very practical for service. Less practical are the 1E6
screws that hold things in place. In its lifetime it has apparantly seen quite some service, and quite a few of the Pozidriv screws had worn-out heads
I replaced those with fresh ones.
The large metal 'hockey puck' is a special battery to power the NVRAM. Apparantly these are somewhat notorious for leaking extremely corrosive chemicals, which destroys the PCBs they sit on. Mine were OK, 2.8Volts roughly.
The same batteries are also used in the RAM packs for this analyser model. Both my 2 8Kbyte (wow..) RAM packs proved to be OK. They hold 4x a 6116 2K SRAM chip. The RAM packs can hold analyser settings, acquired analyser data etc.