15
Maintenance
For information about parts, accessories, or service -- contact your dealer directly or contact VanGuard
Microscopes at 800-423-8842 | [email protected] | veegee.com
The eyepieces and objective lenses on VanGuard Microscopes have delicate, optical coatings. Therefore they should
never
be wiped while dry because any dirt or dust will scratch the coating. Blow off the lens surface with an air-bulb
and lens brush. Then use a lens cleaning solution.
Never use anything other than lens cleaner on any optical
component.
Apply with a cotton swab for a minimum of wetting, then wipe the surface clean with a quality lens tissue.
The same care instructions apply to all optical parts on this VanGuard Microscope, including the substage condenser
and the collector lenses.
All other parts can be cleaned with a paper towel and mild detergent. Be aware that rubbing alcohol can break down
lubricants and damage the painted surfaces; it is therefore not recommended. If used, be careful when cleaning near
the following parts:
• Stage rack and pinion gears
• Focus controls
•
Nosepiece
• Substage gears
• Substage controls
Xylene, since it breaks down the bonding material holding the lenses, should never be used as a cleaner.
Periodically, your VanGuard Microscope should be fully serviced by a qualified service technician.
In order to keep dust and debris out of the optical pathways, always keep the camera port and eyetubes covered (with
either eyepieces or dust caps), and always use the dust cover when the microscope is not in use.
Caring for your VanGuard Microscope
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All Models
Remove the fuse holder from the rear of the microscope (figure 26a) by using a slotted
screwdriver to push inward while turning counter-clockwise.
Remove the fuse from the fuse holder (figure 26b).
If the fuse is blown, replace it by inserting a new fuse into the fuse holder.
Replace the fuse holder back into the microscope by pushing inward then turning in a
clockwise direction with the slotted screwdriver.
Do not overtighten!
Replacing the Fuse
All Models
Before attempting to replace or remove the fuse
UNPLUG THE MICROSCOPE FROM ANY POWER SOURCE!
Figure 26
If the microscope is plugged in but the bulb is not turning on, the fuse could be blown. The
instructions below detail how to check for a blown fuse. You can tell a fuse is blown if the
wire inside the glass is broken, the glass is blackened, or by performing a continuity test.
Replacement Fuse
—0.25A, 250V (Cat. No. 1400-FS1)
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[b]
[a]
