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10
3M 9800 Operator’s Guide
Troubleshooting
Problem
Probable Causes
Solution
Lamp does not illuminate but fan motor
runs.
c. Control Panel door open.
d. Lamp changer dial not engaged.
e. Lamp not seated properly.
f. Burned out lamp.
a. Close control panel door.
b. Fully rotate lamp changer dial until it
stops.
c. Seat lamp squarely in socket.
d. 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.
Lamp and fan both work but accessory
outlets do not have power.
a. Outlets overloaded, circuit breaker
tripped.
a. Unplug accessories and reset circuit
breaker. Accessories must not
exceed 5 amps total.
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.
c. Check Internal Voltage Switch
setting.
d. Lamp Voltage Protector setting to
low.
a. Document actual lamp life, then
contact Lamp Supplier or 3M Service
Center.
b. Have electrical line checked by an
electrician.
c. Set internal voltage switch to Low
setting.
d. Call for Service.
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 and/or
fully rotate lamp changer into
position 1 or 2.
Yellow/orange to brown or blue colours
appear in corners of image.
a. Lamp not at best location for
projector to screen distance.
a. Rotate colour tuning dial to remove
colours in corners.
Colour, focus or image problem.
a. Optics out of alignment.
a. Call for service.
