Welch Allyn Exam Light III 35W Halogen Lamp Replacement Instructions - Quick Reference Guide - Manual (Page 2)

1. Turn the unit off and unplug the power cord from both the wall outlet and
the Light Box.
2. Remove the unit from the patient area.
3. Using a screwdriver, loosen the single panel fastener that protrudes from
the bottom of the unit. As the screw is loosened, there will be a
noticeable “drop” as the front cover is released. 
  
4. Slightly lift the bottom of the front cover toward you and then slide the
cover up to remove it.
  
5. For initial lamp replacement only: Grasp wire clip at top of lamp. Rotate
clip toward the base of the unit until it pops out.
   Discard clip. It was
for shipping purposes only.
6. Grasp the lamp connector and pull the lamp straight out of its holder.    
7. Pull the lamp from its connector and replace it with Welch Allyn
Replacement Lamp #04200.
  
8. Push the lamp back into the holder.
9. Attach the front cover by sliding the tabs at the top of the cover into the
slots at the top of the back housing and then tightening the screw at the
bottom of the unit.
10. Return the unit to the patient area and plug power cord back into bottom
of unit and wall outlet.