3M 2100, Service Manual

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3-1
MODEL 2100 OVERHEAD PROJECTOR
SECTION 3 - TROUBLESHOOTING
SYMPTOM CHECK CAUSE/SOLUTIONS
Projected image is:
a. Corners of projected image
appear red (brown) or blue.
b. Top, bottom, or sides of
projected image are not
focused.
c. Not as bright as it should
be.
Focus mechanism slips or is
too tight.
Lamp does not energize, but
fan motor does energize.
Neither lamp nor fan motor
energizes.
- Is lamp of proper type? (See
label on underside of top cover)
- Is lamp properly seated down in
its socket and vertical?
- If unit is equipped with a lamp
changer, is changer lever fully
seated in the number one
position?
- Is lamp of proper type? (See
label on underside of Top
Cover)
- Is lamp properly seated down in
its socket and vertical?
- If unit is equipped with a lamp
changer, is changer lever fully
seated in the number one
position?
- Are any of the optics
components noticeably
"knocked" out of alignment?
- Is lamp of proper type? (See
label on underside of Top
Cover)
- Is lamp properly seated down in
its socket and vertical?
- If unit is equipped with a lamp
changer, is changer lever fully
seated in the number one
position?
- Has another FNT lamp been
tried?
- Focus tension screw needs
adjustment
- Is lamp burned out?
- Is lamp of proper type? (See
label on underside of top cover)
- Is lamp properly seated down in
its socket and vertical?
- If unit is equipped with a lamp
changer, is changer lever fully
seated in the number one
position?
- Is power cord plugged into
electrical outlet?
- Is outlet supplying power to
projector?
- Damaged or misadjusted optics
components (requires
realignment of optics).
- Head "knocked" out of
alignment.
- Adjust Color Tuning
- Adjust optics components
(requires realignment of
optics).
- Lamp not seated.
- Reflector
- Condenser
- Replace lamp.
- Damaged or misadjusted optics
components (requires
realignment of optics).
- Corroded wiring connection.
- Wrong lamp on
- Reflector broken/missing
- To tighten, turn screw
counterclockwise. To loosen,
turn clockwise. Add update kit
if required. (see next page)
- Replace lamp.
- Replace overheat thermostat.
- Replace lamp sensing switch
(only on projectors equipped
with lamp changer).
- Loose or broken wire
connection.
- Defective power supply.
- On-off switch defective.
- Defective interlock switch.
- Loose or broken wire
connection.
- On-off switch out of
adjustment.
- Replace Fuse (if equipped)