7
3. ELECTRICAL MAINTENANCE
A. The extent of electrical maintenance, by other than a qualified technician, should be bulb replacement.
BE CERTAIN TO TURN SWITCHES OFF AND REMOVE PLUG FROM POWER SOURCE OUTLET
BEFORE CHANGING BULBS.
B. To replace bulb, gently lay microscope on side. Using a Phillips (cross-head) type screwdriver, remove 5
each 3mm Phillips screws from bottom of base. Remove base plate to expose bulb. Using a tissue or
cloth to gently grasp the halogen bulb, pull straight out of lamp socket. Your microscope requires a 12
volt, 20 watt halogen bi-pin bulb, available from the dealer from which your purchased your microscope.
This is a common microscope bulb, Osram #64425 or equal. Make certain that new bulb is clean.
Grasping bulb gently with tissue or cloth, insert pins straight into lamp socket. Replace base, and secure
with 5 each 3mm Phillips screws.
TROUBLESHOOTING
PROBLEM
REASON FOR PROBLEM
SOLUTION
Light fails to operate.
Outlet inoperative.
Have qualified service technician
repair outlet.
AC power cord not connected.
Plug into outlet.
12 volt DC output plug not
plugged into DC power jack.
Plug 12 volt DC output plug into
DC power jack.
Lamp burned out.
Replace lamp.
Image does not remain in focus
Stage of microscope drops from
its own weight.
Adjust tension control.
Image will not focus
Rack stop not set at proper
position.
Adjust rack stop.
Slide upside down.
Place slide on stage with cover
slip up.
Slide cover slip too thick.
Use 0.17mm thick cover slip
(No.1 cover slip)
Poor resolution
(image not sharp)
Objective lenses dirty.
Clean objective lenses.
Eyepiece lens dirty.
Clean eyepiece lenses.
Too much light.
Adjust disc diaphragm.
Spots in field of view.
Eyepiece or condenser lens dirty.
Clean lens. ***
Specimen slide dirty.
Clean slide.
***Spots in field of view can also result from dirt on inside of eyepiece. It is recommended that you have
service technician clean inside of lens.
OPTIONAL ACCESSORIES AND PARTS:
#610-155
WF10x eyepiece w/pointer
#800-160
Replacement bulb, 12v 20 watt halogen bi-pin, (Osram #64425 or equal)
LIMITED LIFETIME WARRANTY
(Revised 2/18/09)
