Leica CM1850 Cryostat – Error E027. Lab Equipment Repair October 31, 2019 admin Blog, videos Leica is no longer servicing the CM 1850, but we are! Learn more here. Related Posts How to repair a Tissue Processor Strainer. More useful histology equipment repair tips! Does turning off your cryostat save electricity? How to repair a sticky cassette clamp. Helpful histology equipment repair insights.