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TROUBLESHOOTING
PROBLEM
Light fails to operate.
(131/132-CLED only)
(131/132-CLED only)
Image does not remain in focus
Image will not focus
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 bulb
#800-102
Replacement bulb, 115v 20 watt tungsten D.C. medium base
#801-160
Replacement fuse, 0.5 amp, time delay
#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. Fits all
models in series, except dual head models.
#975-002
Carrying case, anodized aluminum, fabric lining, accessory pockets, Velcro straps, keyed lock. Fits dual
head models.
#975-138
Carrying case, heavy plastic w/foam liner. Fits all models in series, except dual head models.
LIMITED LIFETIME WARRANTY
Please see our website, www.nationaloptical.com, for complete warranty details and exclusions.
REASON FOR PROBLEM
Outlet inoperative.
AC power cord not connected.
Lamp burned out.
LED bulb burned out.
Fuse blown.
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.
(131-CLED & 132-CLED only)
(131-CLED & 132-CLED only)
7
SOLUTION
Have qualified service technician
repair outlet.
Plug into outlet.
Replace lamp.
Replace LED.
Replace fuse.
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 disc diaphragm.
Clean lens. ***
Clean slide.
(131 & 132 only)
(Revised 6/24/14)
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