Thermo Scientific SAM12, Manual

Page: 129 / 176

Issue: 1.0 Technical Description - Circuitry
Thermo Fisher Scientific SAM12 User Manual 7-7
Neither the display or the back-light inverter or the controller
are user serviceable and should be returned to Thermo Fisher’s
Service department for repair.
General Electromagnetic Compatibility
(EMD) Considerations
The overall construction is designed to minimise the effects of
mains and airborne interference and emissions.
It is, therefore, vital that the construction standard is maintained
at all times, particularly when replacing parts and during
servicing.
Earthing is particularly important for continued EMC (and
Safety) performance. ‘Hard’ earthing of the mains inlet/filter
assembly and LCD display tail, the FHT681 HV/Amplifier
screening can and the frame earth are particularly important.
Refer to the relevant Servicing instructions in
Routine Checks
(page 8-1) for details.
The instrument should only be operated with all earthing
connections securely made and all screening covers fitted.