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An LED "bulb" will last up to 50,000 hours so you don't have to do this exercise very often.
To open the illuminators field lens housing, use 0.9mm "L" type hex key wrench supplied with your microscope.
Loosen hex screws on lens housing. Remove lens housing to expose LED "bulb". Remove bulb by grasping the
plastic base of bulb and gently pulling straight up. Insert new LED "bulb", replace lens housing and tighten hex
screw to secure lens housing in place.
TROUBLESHOOTING
PROBLEM
Light fails to operate.
Image does not remain in focus
Unable to focus image
Poor resolution
(image not sharp)
Spots in field of view.
***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:
#610-045R
WF10x eyepiece w/reticle, 10mm/100div.
#615-045
WF15x eyepiece w/pointer
#760-045
DIN 60xR objective lens, N.A. 0.90
#800-001
Replacement LED light
#802-003
Replacement auto cut-off recharger for rechargeable LED microscopes.
#910
Graduated mechanical stage, side mount adjustments (installed by end user)
#951
Dustcover, 16" tall x 13", heavy vinyl with stitched seams.
#975-001
Carrying case, anodized aluminum, fabric lining, accessory pockets, Velcro straps, keyed lock.
LIMITED LIFETIME WARRANTY
Please see our website,
REASON FOR PROBLEM
Batteries fully discharged.
Rheostat control not turned far
enough.
Light switch in off position.
LED "bulb" burned out.
Stage of microscope drops from
its own weight.
Rack stop not set at proper
position.
Slide upside down.
Slide cover slip too thick.
Objective lenses dirty.
Eyepiece lens dirty.
Too much light.
Eyepiece or condenser lens dirty.
Specimen slide dirty.
www.nationaloptical.com
for complete details and exclusions.
7
SOLUTION
Recharge batteries.
Turn rheostat to increase light
intensity.
Turn light switch on.
Replace LED "bulb".
Adjust tension control.
Adjust rack stop.
Place slide on stage with cover
slip up.
Use 0.17mm thick cover slip
(No.1 cover slip)
Clean objective lenses.
Clean eyepiece lenses.
Adjust iris diaphragm.
Clean lens. ***
Clean slide.
(Revised 6/24/14)
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