3M 2100 User Manual
Model 2100 (4100)
Overhead Projector
Service Manual
(Order the M2100 Illustrated Parts Breakdown separately - Stock # 78-6970-4936-5)
78-6970-1335-3 9/92
Visual Systems Division
3M Austin CenterBuilding
A145-5N-01
Austin, TX 78726-9000
MODEL 2100 OVERHEAD PROJECTOR
TABLE OF CONTENTS
Technical Support Hotline - 1-800-328-1371 (U.S. & Canada)
TITLE PAGE NUMBER
Section 1 - Introduction.................................................................................1-1
Specifications..............................................................................1-1
Principles of Operation................................................................1-3
- Optics.......................................................................................1-3
- Cooling.....................................................................................1-3
Section 2 - Operation and Maintenance........................................................2-1
Set Up Procedure.......................................................................2-1
Lamp Management System........................................................2-3
Cleaning......................................................................................2-4
- Cleaning Stage and Fresnel Lens.............................................2-4
- Mirrors......................................................................................2-4
Lubrication..................................................................................2-5
Section 3 - Troubleshooting...........................................................................3-1
Section 4 - Adjustments................................................................................4-1
General.......................................................................................4-1
Tools Required............................................................................4-1
Projector Check-out Facilities......................................................4-1
Optical Alignment........................................................................4-3
- Square Image...........................................................................4-3
- Focus Mechanism.....................................................................4-4
- Aligning the Fresnel Lens.........................................................4-4
Color Tuning Cable......................................................................4-5
Post (Folding)..............................................................................4-6
Lampchanger Cable....................................................................4-6
Section 5 - Electrical Diagrams.....................................................................5-1
Section 6 - Disassembly/Re-assembly..........................................................6-1
Projection Head Assembly (Doublet)..........................................6-1
Projection Head Assembly (Triplet).............................................6-1
Top Cover Assembly...................................................................6-1
Fresnel Lens...............................................................................6-1
Stage Glass................................................................................6-2
Focusing Assembly.....................................................................6-2
Condenser Lens.........................................................................6-3
Section 7 - Illustrated Parts Breakdown.........................................................7-1
(Published separately - Stock # 78-6970-4936-5)
9/92
MODEL 2100 OVERHEAD PROJECTOR
SECTION 1 INTRODUCTION
This service manual contains servicing instruction, troubleshooting guide,
adjustments, electrical diagrams, assembly/dis-assembly of parts and the
illustrated parts list.
ANGULAR BODY
(2130/4130, 2140/4140, 2160, 2170)
ROUND BODY
(2150/4150, 2180)
SPECIFICATIONS
Physical
Width - 15.25" (387mm)
Depth - 20.25" (514mm) (Post in upright position)
- 26.25" (667mm) (Post in folded position)
Height - 7.75" (197mm) (Body)
- 30.75" (781mm) (Maximum, top of head)
Weight - 22 lbs. (10.0 Kg) 2180
- 25 lbs. (11.3 Kg) 2130, 2140, 2150, 2160, 2170, 4130, 4140, 4150
9/92
1-1
MODEL 2100 OVERHEAD PROJECTOR
1-2
9/92
MODEL 2100 OVERHEAD PROJECTOR
Electrical
2130/2140/2150
2160/2170/2180 2160/2170/2180
4130/4140/41 50
Voltage
Frequency
Current Rating
Power Cord
Agency Approval
120/127/VAC
60HZ
3.0 Amps
14-1/2' (4.4mm)
UL, CSA
100VAC
50/60HZ
3.6 Amps
14-1/2' (4.4mm)
-------
220/230/240VAC
50HZ
1.7 Amps
14-1 /2' (4.4mm)
VDE, NEMKO,
SETI
Fuse
-------
F4 Amp - 250 Volt
SEMKO, SEV
F4 Amp - 250 Volt
Mechanical
Safety interlock: Shuts off power to the projector when the top cover assembly is opened.
Safety thermostat: Cuts power to the lamp if the projector exceeds safe operating
temperature.
Color tuning knob: Allows projector to be easily color tuned for any screen size
1.0m x 1.0m (40" x 40") to 2.8m x 2.8m (110" x 110").
Projection Head Tilt - 0° - 20° (All Heads)
Lamp Changer - when lamp burns out, switch to standby lamp.
Optical
Lamp: ANSI Code FNT, 24 Volt, 275 Watt
Lamp Life: 75 Hours
2130/2140/2150 2160/2170/2180
4130/41 40/4150
Illumination: 2000 lumens typical; 2100 lumens typical;
1800 lumens minimum;1900 lumens minimum;
Mirrors: Chassis mirror is second surface high reflective type. (After serial no. 435242)
Projection mirror is front surface high reflective type.
2130, 2140, 2160, 2170 2150, 2180
4130/4140 4150
Head, Projection: 355mm (14.0" F.L.) 327mm (12.9" F.L.)
Doublet Triplet - w/focus
293mm (11.5" F.L.) correction
Singlet 330mm (13" F.L.)
After serial no. 411964
2130/21 40/2150 2160/2170/2180
4130/41 40/4150
Stage: 267mm x 267mm 285mm x 285mm
Transmissive (10.5" x 10.5") (11.2" x 11.2")
Aperture
9/92
1-2
MODEL 2100 OVERHEAD PROJECTOR
PRINCIPLES OF OPERATION
Optics (See Figure 1-2)
The light source for the Overhead Projector
is 275 watt, 24 volt, Tungsten Lamp listed
as ANSI Code FNT and rated at 75 hours.
An external reflector is needed with this
lamp.
Care should be exercised to prevent
excessive vibration or jarring of the
projector when the lamp is on. The lamp
filament becomes more brittle at the
operating temperature of the projector and
shocks may cause premature failure of the
lamp.
The glass envelope should not be touched
by the fingers when inserting the lamp in
the lampholder. Oils on the skin may
combine with the glass to form blisters
which also will shorten the life of the lamp.
The Fresnel lens, located above the lamp
and directly beneath the projection stage, is
a condensing lens which consists of a
series of concentric rings, each of which
has a surface curvature similar to that of a
thick smooth lens. The Fresnel lens is made
of plastic and may be severely damaged if
the fan is stopped or the paths of cooling air
blocked. Proper alignment and direction of
the Fresnel lens is essential in order to
maintain the resolution and brightness
specifications for the projector.
The stage glass provides a convenient flat
surface for placing transparencies and other
materials to be projected. Because the light
passes through the stage, these projection
materials must be transparent.
There are two (2) different projection head
assemblies available for the projector. One
is an Open Triplet Head with focus
correction which has a triplet lens and front
surface mirror and the second a closed
Doublet Head which has one or two
condensing lens(es) and a front surface
mirror. The projection head is located
directly over the center of the Fresnel Lens.
The projector is focused by raising or
lowering the projection head.
Proper alignment of the optical components
and a clean machine are essential if the
maximum operating capabilities of the
overhead projector are to be realized.
Cleaning and alignment procedures are
discussed in Sections 2 and 4 inclusive.
Cooling (See Figure 1-3)
Cooling of the overhead projector is
accomplished by a motor-driven fan located
next to the lamp housing. The cooling air
enters the projector through opening “A”
and exits through opening “B.” (See Figure
1-3) It’s important that the flow of cooling air
not be restricted either by placing projector
too close to a wall (about one foot
clearance is necessary) or by leaving
foreign objects inside the projector.
1-3
9/92
SECTION 2 - OPERATION AND MAINTENANCE
SET UP PROCEDURE
1 . Connect the power cord to a properly
grounded electrical outlet. (Electrical
requirements are listed on the serial plate
located under the base of the projector.)
2. Place the projector on a level surface and
turn the projector on by pushing down on
the ON/OFF switch.
MODEL 2100 OVERHEAD PROJECTOR
CAUTION!
Do not look in the front projection
lens when lamp is on.
3. Adjust the image to the screen
elevation by moving the front
projection lens upward or downward
on the DOUBLET HEAD
ASSEMBLY and the mirror on the
TRIPLET HEAD ASSEMBLY. (See
Figure 2-2)
4. Place a transparency on the stage glass
and focus the projected image by rotating
the Focus Knob. (See Figure 2-3)
5. To maintain top to bottom focus when the
screen is not perpendicular to the
projected image, engage the FOCUS
CORRECTION LEVER located on the
under side of the TRIPLET HEAD
ASSEMBLY using the following
procedure:
NOTE
THE PROJECTION SCREEN
MUST BE IN THE VERTICAL
9/92
POSITION.
2-1
MODEL 2100 OVERHEAD PROJECTOR
A. Pull the mirror down as the FOCUS
CORRECTION LEVER is pushed to
the rear of the head assembly.
B. Raise the mirror back to the original
position and refocus using the FOCUS KNOB.
6. Rotate the Color Tuning Knob until
the projected image is free of any
yellow or blue corners.
- To remove blue corners, rotate the
dial counterclockwise.
- To remove yellow corners, rotate the
dial clockwise.
Correct any horizontal keystoning by
moving the projector until it is perpen dicular with the screen.
7. Correct any vertical keystoning by
tilting the screen until it is perpendicular to the light beam axis.
2-2
9/92
LAMP MANAGEMENT SYSTEM
(Lamp Indicator)
Pertains only to models equipped with lamp
indicators. (2130/4130 - No holes, opaque)
NOTE
When the projector is turned on, the
red X will momentarily light. This is a
characteristic of the projector.
The Lamp Indicator indicates status of
projection lamp as defined on the following
labels:
MODEL 2100 OVERHEAD PROJECTOR
METHOD 1
A red X will appear on the lamp symbol
when that lamp is burned out. Switch to the
standby lamp. The X will continue to light
until the defective lamp is changed.
METHOD 2
A red X will appear between the two lamp
symbols when a lamp is burned out. Switch
to the standby lamp. The X will continue to
light until the defective lamp is changed.
NOTE
The Overhead Projector must remain
on for 2 to 3 minutes after a lamp
burns out. This will allow the fan to
cool the burned-out lamp and
prevent burned fingers. Unplug the
unit before replacing the lamp.
9/92
2-3
Loading...