X-Rite 820 Densitometer - problems!

Doc W · Jun 21, 2016

I have an old X-Rite 820 and when I shut it off, it does not remember my calibrations the next time I fire it up. There must be a battery or EEprom somewhere that needs replacing. Do any of you know how to solve this or does anyone have a schematic?

sfaber17 · Jun 21, 2016

They don't normally offer schematics. There is nothing on the assembly diagrams about it or in the manual. It is probably like the 310 and 309 and has a lithium backup battery with pigtails. Its a bit too old for EEproms. I bought some from Bulbs and Batteries without pigtails and soldered some on and fixed the 310 and 309 (watch the voltage - one was 3.4 and one 3.0 v). They are not too hard to locate on the main board. I haven't had to work on the 811/820 yet.

Doc W · Jun 22, 2016

sfaber17 said:
They don't normally offer schematics. There is nothing on the assembly diagrams about it or in the manual. It is probably like the 310 and 309 and has a lithium backup battery with pigtails. Its a bit too old for EEproms. I bought some from Bulbs and Batteries without pigtails and soldered some on and fixed the 310 and 309 (watch the voltage - one was 3.4 and one 3.0 v). They are not too hard to locate on the main board. I haven't had to work on the 811/820 yet.

Thanks a lot for this. I am going to take a more detailed look (well, another APUGer, Hexavalent, will be taking the look. It sounds like rocket science to me!)

X-Rite 820 Densitometer - problems!

Doc W

sfaber17

Doc W

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