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4 3M 1700 Operator’s Guide
Main Menu
Troubleshooting
Problem Probable Causes Solution
Lamp does not illuminate but fan
motor runs.
a. Lamp changer control not engaged.
b.
Lamp not seated properly.
c.
Burned out lamp.
a.Fully slide lamp changer control until it stops.
b.Seat lamp squarely in socket.
c.Replace lamp.
Neither lamp nor fan energize.
a.Projector not plugged in.
b.Stage cover not completely closed.
c.No power at wall outlet.
a.Plug projector into outlet.
b.Close stage cover to engage safety interlock.
c.Verify outlet has power.
Fan motor does not run but lamp
illuminates.
a.Fan blade/motor obstructed.
b.Burned out fan motor.
a.Call for service.
b.Call for service.
After replacing a burned out lamp, the
new lamp fails.
a.Defective lamp was installed.
b.Possible electrical problem.
a.Replace lamp.
b.If new lamp fails immediately, you may have
an electrical problem. Call for service.
Short lamp life: Lamps seem to fail
before expected life span.
a.Defective lamps.
b.High line voltage.
a.Document actual lamp life, then contact Lamp
Supplier or 3M Service Center.
b.Have electrical line checked by an electrician.
Projected image is wider at the top
than bottom (Vertical Keystoning).
a.Screen not aligned at 90
° angle to projected
light beam.
a.Tilt projection screen toward projector until
image width is equal at top and bottom.
Projected image higher on one side
(Horizontal Keystoning).
a.Projector not aligned at 90
° angle to screen.
a.Rotate projector until image height is equal on
both sides.
Projected image is dim.
a.Dirty stage glass, lenses, mirrors.
b.Condenser lens bracket open or retaining
clip not engaged.
c.High/low lamp control setting incorrect.
a.Remove surface dirt.
b.Close and secure lens bracket with retaining
clip.
c.Set control to high for brightest image.
Projected image does not have
uniform brightness.
a.Lamp not aligned properly. a.Properly seat lamp in socket. Fully slide lamp
changer into position 1 or 2.
Yellow/orange to brown or blue colors
appear in corners of image.
a.Lamp not at best location for projector to
screen distance.
a.Rotate color tuning dial to remove colors in
corners.
Color, focus or image problem.
a.Optics out of alignment. a.Call for service.
Cleaning
For best performance, use 3M™Overhead Cleaner 676 to keep
your projector free of excess dust and surface dirt.
Stage Glass and Lenses: Use 3M overhead cleaner and a soft,
lint–free cloth to remove surface dirt from the stage glass,
projector lens and bottom of Fresnel lens.
Projection Mirror: Use a soft brush to remove surface dirt
from the projection mirror.
Caution
!
The projection mirror is a front–surface mirror and to avoid
damage to the lens surface, the lens must not be wiped clean.
5


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