Thermo IEC Micromax 3590, Service Manual, Page: 32 / 84

Main Cabinet (All Units)
1. Remove lid per section 8.1.
2. Remove (4) screws located on the top of the cabinet. (This may
require removal of a warning label. Be sure to re-apply the label
when finished.)
3. On non-refrigerated units, remove (2) screws located on the back
of the cabinet. On RF models, remove rear cabinet as mentioned
above.
4. Gently lift cabinet partially off of the unit to allow access to the
display board ribbon cable and ground wire.
WARNING: At this point it is possible to directly contact the unit’s circuit
boards and other electronic components. The unit must be
unplugged to prevent injury, and the service technician must
be grounded. Any contact to the circuit boards without
proper grounding can result in damage to components.
WARNING: During certain troubleshooting procedures it is necessary to
activate the unit with the cabinet partially removed, so that
the control panel is still plugged in. Extreme care must be
taken to avoid electrical shock.
5. Disconnect ribbon cable and ground wire. (When reconnecting,
reposition the ribbon cable in the tie-down clip mounted on the
inside surface of the cabinet. This prevents damage to the cable
from the latch mechanism.)
6. Remove cabinet. If operation is required with the cabinet
removed, lie the cabinet down on its side while keeping the
Display PCB connected.
Lid and Cabinet are replaced by reversing the steps above.
8.3
Gasket(s)
The lid liner engages cover gasket(s) on both units. There
is one horizontally mounted and one vertically mounted
cover gasket around the guardbowl edge.
Additionally, in RF models, the is a gasket located between
the cabinet and the guardbowl. This gasket prevents any
water (melted frost) from getting into the electrical portions
of the centrifuge. If any gap is visible, the gasket should
be replaced, or the gap filled with silicon RTV.
Micromax Series
30
Service Manual