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C. Replacement of fuse
The fuse is located at the right rear side of microscope base. To remove fuse from holder, insert
a 6mm screwdriver blade into slot located in rear of fuse holder cap. Slightly depress and rotate
screwdriver ¼ turn in direction of arrow, release pressure on screwdriver to release the fuse. Pull
cap and fuse out of fuse holder. Insert proper fuse into fuse cap. Insert fuse cap into fuse holder.
Using screwdriver, rotate fuse cap assembly in opposite direction of arrow until guide slot
engages, depress fuse cap and rotate ¼ turn to lock into fuse holder.
TROUBLESHOOTING
PROBLEM
Light fails to operate.
Image does not remain in 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:
#615-400
WF15X Eyepieces (pair), increases magnification 50%
#800-138
Bottom replacement bulb, 115v 5 watt fluorescent
#800-423
Top replacement bulb, 12v 10 watt halogen w/reflector
#801-100
Replacement fuse for 117v version, 1.0 amp
#940-460
Transparent plastic stage plate, 80mm
#941-460B
Black plastic stage plate, 80mm
#941-460W
White plastic stage plate, 80mm
#965-400-05
Eyepiece reticle, 5mm/100 divisions, O.D. 23 mm (for use with WF10x eyepiece only)
#965-400-10
Eyepiece reticle, 10mm/100 divisions, O.D. 23 mm (for use with WF10x eyepiece only)
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.
Fuse blown.
Head of microscope drops from
its own weight.
Objective lenses dirty.
Eyepiece lens dirty.
Eyepiece lens dirty.
www.microscopeworld.com
info@microscopeworld.com
800-942-0528
6
SOLUTION
Have qualified service technician
repair outlet.
Plug into outlet.
Replace lamp.
Replace fuse.
Adjust tension control.
Clean objective lenses.
Clean eyepiece lenses.
Clean eyepiece lenses. ***
(Revised 4/10/07)
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