Labnet Spectrafuge 16M Microcentrifuge Service Manual - Manual (Page 12)

Section 4
After removing, turn the upper casing so that the inside of
the front panel is visible (figure #7, pg 17). If power to the
solenoid is present, but the solenoid does not move, it
should be checked and/or replaced.
Other potential latch faults could be the result of poor wiring
connections, poor alignment of the lid latch catch, sticking
or jamming of the lid latch strike or no contact at the
microswitch.
If necessary the lid may be opened manually:
1. Disconnect the power cord from the wall socket power
supply.
2. Remove the plastic plug, located on the left side of the
unit, below the quick button.
3. Pull the cord (attached to the plug) to open the lid lock
manually.
Stepdown Transformer The stepdown transformer supplies 24 VAC to the PCB. If
power is not present, check the primary and secondary
windings for opens or shorts. To replace the transformer,
follow these instructions.
Always disconnect centrifuge from power source before
attempting any service procedures. Failure to do so may
result in electrical shock and serious injury to personnel.
Tools needed: Phillips head screwdriver
1) Remove the outer casing as previously described.
2) Remove the two mounting screws and nuts holding the
transformer in place (see figure #8, pg 18).
3) Remove the wire connectors one at a time from the old
transformer and transfer to the same positions on the
new transformer.
4) Line the new transformer up over the mounting holes
and secure the two mounting screws and nuts.
5) Replace the outer casing.
10
CAUTION