Model 2100 (4100) Overhead Projector Service Manual (Order the M2100 Illustrated Parts Breakdown separately - Stock # 78-6970-4936-5) 78-6970-1335-3 Visual Systems Division 3M Austin CenterBuilding A145-5N-01 Austin, TX 78726-9000 9/92
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 .........................................................................
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 Depth Height Weight - 15.25" 20.25" 26.25" 7.75" 30.75" 22 lbs. 25 lbs. (387mm) (514mm) (667mm) (197mm) (781mm) (10.0 Kg) (11.
MODEL 2100 OVERHEAD PROJECTOR 1-2 9/92
MODEL 2100 OVERHEAD PROJECTOR Electrical Voltage Frequency Current Rating Power Cord Agency Approval Fuse 2130/2140/2150 4130/4140/41 50 120/127/VAC 60HZ 3.0 Amps 14-1/2' (4.4mm) UL, CSA ------- 2160/2170/2180 2160/2170/2180 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 SEMKO, SEV F4 Amp - 250 Volt F4 Amp - 250 Volt Mechanical Safety interlock: Shuts off power to the projector when the top cover assembly is opened.
MODEL 2100 OVERHEAD PROJECTOR PRINCIPLES OF OPERATION 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. 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.
MODEL 2100 OVERHEAD PROJECTOR 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. CAUTION! Do not look in the front projection lens when lamp is on. 3.
MODEL 2100 OVERHEAD PROJECTOR Correct any horizontal keystoning by moving the projector until it is perpendicular with the screen. 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.
MODEL 2100 OVERHEAD PROJECTOR 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: METHOD 1 A red X will appear on the lamp symbol when that lamp is burned out. Switch to the standby lamp.
MODEL 2100 OVERHEAD PROJECTOR the hinge pin is out of the hole. Slide the complete Top Cover Assembly in the opposite direction to release the second hinge and lift up and out (See Figure). CLEANING The optical components of the overhead projector require occasional cleaning to remove the dust and oil which tends to accumulate and absorb light. 3M Brand Lens Cleaner (Part No. 78-6969-7086-6) is recommended. A small amount of mild detergent in water will serve as a substitute.
MODEL 2100 OVERHEAD PROJECTOR LUBRICATION As needed and upon new parts installation, lubricate lightly the following area with Anderol No. 757 Grease (3M Part No. 788000-8079-4). For reference on the lubricating points, see the three blow-up parts lists.
MODEL 2100 OVERHEAD PROJECTOR SECTION 3 - TROUBLESHOOTING SYMPTOM Projected image is: a. Corners of projected image appear red (brown) or blue. CHECK - 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.
MODEL 2100 OVERHEAD PROJECTOR TROUBLESHOOTING (continued) SYMPTOM Fan motor does not rotate, but lamp does energize. CHECK - Is anything blocking rotation of fan motor? CAUSE/SOLUTIONS - Loose or broken wire connection to motor. Defective fan motor. Both lamps of units with lamp changer energize at once. - Wires crossed and touching? Lamp changer switch? - Defective lamp sensing switch. Projector does not operate when power switch is depressed.
MODEL 2100 OVERHEAD PROJECTOR SECTION 4 ADJUSTMENTS GENERAL The following section describes the adjustments that will be necessary to service the Model 2100 (4100) Overhead Projectors. TOOLS REQUIRED A. B. C. D. E. F.
MODEL 2100 OVERHEAD PROJECTOR 1. Select a 60 by 60 inch, smooth area on one wall. Place a sturdy bench or test stand about 8 feet from this wall area. Position the Overhead Projector on the test stand so that it points toward the wall. 2. Measure the vertical distance from the floor to the center of the front projection lens. Following a floor or ceiling line from the projector to the wall, make a mark on the wall the same distance from the floor. 4.
MODEL 2100 OVERHEAD PROJECTOR OPTICAL ALIGNMENT Proper alignment of the optical system is essential for good resolution and uniform illumination. Poor resolution in one corner and either red or blue in the corners of the projected image are indications of poor alignment. The following components should be checked and adjusted if necessary before aligning the overhead projector. D. To square the image on the Triplet Head, remove the two Top Shroud screws and lift off the Top Shroud.
MODEL 2100 OVERHEAD PROJECTOR FOCUS MECHANISM ALIGNING THE FRESNEL LENS If the projection head does not hold its focus position, you must adjust focus knob tension or add focus kit (78-8054-1613-4 (gray), 78-80541614-2 (charcoal). To adjust: Turn the Tension Screw counterclockwise to tighten focus assembly. Turn clockwise if binding occurs. When replacing the Fresnel Lens, use the following procedure: A. Remove the Top Cover Assembly. (See Section 2 - Cleaning Stage Glass and Fresnel Lens, page 2-3) B.
MODEL 2100 OVERHEAD PROJECTOR COLOR TUNING CABLE COLOR TUNING CABLE (Before Serial Number 422868) (After Serial Number 422868) No adjustment. NOTE Tension in cable should be 3/16" maximum. A. Raise the Top Cover Assembly by pulling the Release Latch and lift up. (See Figure) B. Turn the Color Tuning Knob clockwise to the maximum. While holding the Cable Screw, loosen the Cable Nut. Using pliers, pull the slack out of the cable. Retighten Cable Nut and Screw. (See Figure) C. D.
MODEL 2100 OVERHEAD PROJECTOR POST (FOLDING) LAMPCHANGER CABLE If POST is not perpendicular to the body of the projector, proceed with the following steps using Figures below as reference: 1. Loosen SET SCREW. 2. Put a square on the body of the projector and against the POST> 3. Turn the CAM clockwise to adjust POST. 4. Re-tighten SET SCREW. NOTE Tension on cable should be a maximum of 3/16". A. B. C. NOTE Hold the Cable Nuts (2) with wrench and loosen the Cable Screws (2).
9/92
9/92
9/92
9/92
9/92
9/92
9/92
9/92
MODEL 2100 OVERHEAD PROJECTOR SECTION 6 DISASSEMBLY/RE-ASSEMBLY PROJECTION HEAD ASSEMBLY (DOUBLET) TOP COVER ASSEMBLY 1. To disassemble Head Assembly from Head Support Bracket: A. Remove Screw Cap from Top Shroud. B. Remove the three screws (“A”). C. Slide the Head Assembly off Support Bracket. 1. Raise the Top Cover Assembly by pulling the Release Lever and lifting up. 2. Using both hands, pull either one of the two hinges outward until the hinge pin is out of the hole.
MODEL 2100 OVERHEAD PROJECTOR STAGE GLASS FOCUSING ASSEMBLY 1. Remove Top Cover Assembly.(See page 61) 2. Remove the Fresnel Lens. (See page 6-1) 3. Remove the six (6) tamper proof screws using a T15 Torx Driver. (3M Part Number 26-1005-8317-3) 4. Remove the MASK (black frame) and Stage Glass. 5. To reassemble, make certain the beveled edges on the Stage Glass are facing down and the 3M logo is in the lower left front corner. (2140/2150 only, 2130 does not have logo) 1 Remove knob. 2.
MODEL 2100 OVERHEAD PROJECTOR How to remove and install the condenser lens (when equipped) Caution! Wear safety glasses when removing lens. .020 Feeler Gage .020 to .030 Gap after installation Tab Illustration A Illustration B 1. Insert a Pin Punch or Drill Rod into the hole in the Tab (see illustration A) 2. Release the lens by bending the Tab. 3. Install the new lens and bend the Tab back into place. Caution! Do not overtighten the tab. The lens must have enough clearance for expansion.
