Sorvall TC6, Service Manual

Page: 78 / 109

TC6 ® Repair and Replacement
5-11
5-10. Printed Circuit Board
Replacement
1. Turn the centrifuge power OFF and unplug the power cord.
2. Remove the two phillips screws located on each side of the
bezel. Carefully lift the bezel up to disengage it from the frame
(but do not disconnect) and gently place the assembly so that
the printed circuit (p.c.) boards are facing up.
NOTE
Retain all hardware for reassembly.
Note the proper orientation of the connectors on each of
the printed circuit boards.
3. Disconnect all connectors from the defective p.c. board.
4. Remove the screws that secure the p.c. board in place. Discard
the damaged p.c. board.
5. Install the new p.c. board. Reconnect the connectors to the
board noting the proper orientation of the connectors.
6. Reinstall the bezel securing it in place with the screws removed
in step 2.
5-11. Motor Replacement
NOTE
Retain all hardware for reassembly unless otherwise
advised.
1. Open chamber door.
2. Turn centrifuge power off and unplug power cord.
3. Remove the motor cover and the chamber bowl with door
gasket from the centrifuge.
NOTE
Early model TC6 ® Centrifuges had a ground wire con-
nected to the underside of bowl. The ground wire is no
longer required and should be permanently removed.
4. Remove the two phillips head screws from the bezel. Lift off,
but do not disconnect, the bezel.
5. Using an 11␣mm socket wr ench, remove the three nuts (and
lockwashers, if any) from the motor mounting plate.
W A R N I N G
Read paragraph 5-9,
Precautions for Handling Printed
Circuit Boards, before beginning this
procedure. Paragraph 5-9 contains
important information regarding how
to prevent personal injury and/or
damage to the printed circuit board
components.
!