Siemens Hematek, Operating Manual, Page: 61 / 98

Section 6: Minor Replacements and Adjustments, Page 6—7
7. Discard the burned-out light assembly into an appropriate waste container.
8. Insert the new light assembly into the circuit board cover, threading the wires through
the opening from the front of the cover and pressing firmly on the light until it snaps
into place.
9. Insert the connector wires into the holes on the connector on the printed circuit board.
Each wire can go into either hole.
10. Tighten the small screws to just past finger tight.
11. Return the circuit board cover to its normal position, between the circuit board panel
and the back edge of the screws, and tighten the two thumbscrews.
Be sure the panel is not resting on top of the screw heads before tightening.
12. Replace the line cord into the AC electrical outlet and turn the instrument on to check
the light operation.
Replacement of the Pump Tubing
If any one of the three pumps fails to deliver the proper amount of solution at the adjusted
volume setting, it is recommended that all pump tubes be replaced. Regular flushing of
the stain tubing with methanol prolongs the life of the tubing. All pump tubes should be
replaced after three Stain Paks have been used. If regular cleaning is not performed, or if
usage is very heavy, the tubing should be changed more frequently. Use the following
procedure to replace the pump tubes with new ones in the Hematek Pump Tube Set (PN
4482).
1. Remove the three cannulas from the Stain Pak.
2. Raise the operating lever to the
PRIME
position until the reagents are pumped out of
the tubes.
Figure 6-7. Priming the Tubing