3M 2100, Service Manual

Page: 13 / 30

9/92
MODEL 2100 OVERHEAD PROJECTOR
3-2
TROUBLESHOOTING (continued)
SYMPTOM CHECK CAUSE/SOLUTIONS
Fan motor does not rotate, but
lamp does energize.
Both lamps of units with lamp
changer energize at once.
Projector does not operate
when power switch is
depressed.
On dual lamp projectors,
position of lamp socket does
not change when lamp
changer control is moved.
Top Cover Assembly does not
close completely.
Lamps burn out.
- Is anything blocking rotation of
fan motor?
- Wires crossed and touching?
- Lamp changer switch?
- Projector plugged in?
- Top Cover all the way down?
- Interlock Switch functioning?
- Fuse (if so equipped).
- Loose tension cable.
- Interlock switch out of
alignment?
- Cover latch movement is
restricted?
- High voltage
- Loose or broken wire
connection to motor.
- Defective fan motor.
- Defective lamp sensing switch.
- Defective power cord.
- Defective Interlock Switch.
- Replace Fuse.
- Broken Wire
- Tighten cable. (See Section 4,
adjustments)
- Align interlock switch.
- Disconnected or broken latch
return spring.
- Install Resistor Kit or replace
transformer or change
transformer tap.
Field Kits Available
Focus Knob Slipping
If the projector is below
SN401987, the knob must
also be replaced.
Resistor Kit (120V)
Base Rail Kit (for broken
base rails on lamp module)
Lt. Grey
Charcoal
Tech Service
78-8054-1613-4
78-8054-1614-2
78-8054-1315-6
78-8054-1443-6
78-8054-1615-9
In the U.S & Canada
Technical Support Hotline - 1-800-328-1371
7:30 - 5:30 CST