Others

* For questions on ELP-3500 maintenance, including service parts or document contents, contact the address below. Any technical information about changes will be released as necessary in service bulletins. 1.1 Product 1.2 Parts of the 1.2.1 Exterior View of the Main 1.2.2 Interior View of the Main 1.2.3 Exterior View of the Remote 1.2.4 Interior of the Remote 1.3.1 MS-DOS and 1.4 Main 1.6 Interface 1.6.1 Mouse Interface 1.6.2 Computer Interface 1.6.3 Computer Audio 1.6.4 Video Interface 1.6.5 I...

Power Sw

* An interlock switch is included for safety purposes. The interlock switch shuts off the supply of AC power if the lamp cover at the bottom of main chassis is opened. * The safety switch input signal is designed for protection from overheating. It stops power output to the light source lamp if the projector detects overheating in the lamp housing area. * An interlock switch is included for safety purposes. The interlock switch shuts off the supply of AC power if the lamp cover at the bottom of...

Product Safety

* Whenever performing repair work on the product, be sure to wear a wrist band and use an electrostatic mat for grounding. When you replace any electric components (boards and light bulb), it is recommended that you touch the electrostatic plastic bag containing the component to a metallic part of the product before taking the component out of the plastic bag. 2. RESTRICTIONS FOR PARTS REPLACEMENT * Use only authorized parts or EPSON-supplied parts for replacement of mechanical components,...

Light Valve R

Light valve R has a red label on the FPC cable. Since the light valves are liquid crystal shutters, they have specific features, depending on the ambient temperature. At low temperatures, reaction speed is fast. After-image, light contrast, or thinner color may occur. At high temperatures, reaction speed is activated. The whole image seems dark.

Operator Safety

PROTECTION FROM ELECTRIC SHOCK * Before performing any repair work on the product, be sure to turn off the power switch and remove the electric power cable from the electrical outlet. * Whenever it is necessary to turn power on after opening the case or cover (for example, during the adjustment process) be sure to remove anything you are wearing that is metal, such as a watch, cuff links, ring, or tie pin, that may touch metallic parts of the product, creating a danger of electric shock. * Be...

Info

Use the right and left arrow keys to adjust the image so that the two patterns on the right side are brightest and are of equal intensity. * When you press the left arrow key, an adjustment value from 0(00) to 64(40) appears in the lower left corner of the screen. 4. Press Enter, and a 16-level green-scale pattern should appear on the screen. 5. Just as in step 3, adjust so that the two blocks on the right are brightest. 6. Press Enter, and a 16-level blue-scale pattern should appear on the...

How To Use This Service Manual

The manual covers topics required for field maintenance, so you can use it for diagnosis of failures or repair. Before beginning maintenance work, be sure to read and observe every safety precautions and all rules. Manual contents are as follows Precautions Operator Safety, Product Safety, Requirements for Servicers Chapter 1 Product Features (Part Names, Connection, Specifications) Chapter 2 Theory of Operation (Hardware, Internal Connections, Unit Functions) Chapter 3 Disassembly and Assembly...

Gnd

An ADB device communicates with a Mac through a protocol specified by Apple Computer Inc., which manipulates the HIGH LOW level of ADB signals. Through the bus, a +5 V current is supplied to the ADB device. The total current consumed by the device must not exceed 500 mA. (For example, the current consumed by an ordinary mouse is approximately 20 mA.) EPSON ELP-3500 Service Manual Mouse Emulation Function This function converts data transmitted from a remote control into mouse data for a PS 2,...

3

Sub contrast (tint) adjustment using a 16-level grayscale pattern To run this program, set up a host computer and monitor, and connect them to the projector using a computer cable and an RS-232C cable. Insert the image adjustment program diskette in the diskette drive, and run the program. A menu appears. Select the menu options and program the settings into the flash ROM on the projector's main board.

31 Disassembly And Assembly Procedures

This section explains how to disassemble the ELP-3500. The assembly procedure is the exact reverse of the disassembly procedure. 1. Remove any rings, wrist watch, cuff links, or other metal accessories likely to come into contact with the equipment. 3. Wear a wrist band and ground it. Place a ground mat under the unit. 4. Turn off the main unit and the host computer. 5. Unplug the power cord from the main unit and service outlet. 6. Disconnect the interface cable from the main unit. 7. Clean...

4

After troubleshooting, make functional checks using the image adjustment program explained in Chapter 5, and verify that the problem has been solved. 4.1.1 Tools and Accessories Required for Troubleshooting Tools and accessories required for projector troubleshooting (including fault isolation) are listed below.

Cn600

Before disconnecting the FPC cable from connectors CN100 and CN101 (1 and 2), gently pull each connector straight up to unlock it. EPSON ELP-3500 Service Manual (Continued from previous page) 2. Remove the screw mounting the FG strap on the power supply unit. Screw +M3x6 F Ni Sems P N 1033025 Mounting torque 6.0 kg cm 5.2 lb inch 3. Remove 7 mounting screws from the main board block (one of the screws mounts the FG strap also). 6 Screws +M3x6 F Ni Sems P N 1033122 Mounting torque 6.0 kg cm 5.2...

212 Lamp Housing

The lamp housing consists of the light source valve and connector for the power supply unit. * The life expectancy of the light source valve is 4000 hours. When operating time exceeds 4000 hours, the lamp indicator on the control panel blinks automatically. If you encounter this condition, replace the light source valve as soon as possible. * The safety switch on the lamp outer housing, beside the lamp housing, detects overheating. If the temperature exceeds the safety zone because of abnormal...

22 Power Supply Unit

The power supply unit includes a DC regulator, exhaust fan, and interlock switch for the lamp cover. This unit generates the voltages for the control circuit (+5 V, +12 V, +18 V) and for the light source lamp (+65 V) from the AC input. Although a functional diagram is shown below, never disassemble the power supply unit during field maintenance service.

23 Main Board

The driver board consists of the CPU, P-ROM, video memory, digital video processor, and circuits to control the interface, control panel, fan, speaker, receptor board interface, etc. The driver board controls everything, except video signal generation. The driver board is available as a unit for the service parts. IC304 includes firmware to set initial values and control projector functions. Fuses, for the protection of the electric circuits, are soldered on the board Their locations are shown...

29 Light Guide Block

The light valve block eliminates ultraviolet rays harmful to the light valves and makes the light intensity from the light source lamp uniform before dividing it into 3 light outputs (R G B). Lenses and mirrors built in the block disperse the light. The drawings below show the appearance and an internal block diagram of the light valve block. RGB Condenser Lens RGB Polarization Unit RGB Condenser Lens RGB Polarization Unit Dispersion of light from the light source lamp through the A B...

1

For a list of parts that may need be replaced during troubleshooting, such as boards, cases, plates, and screws, refer to the parts list in the appendix of this manual. Follow the flowchart below before starting to troubleshoot projector problems, and proceed to the pertinent detailed flowchart (given on the next and subsequent pages). This program diskette contains the adjustment functions in the table below.

11 Product Features

The ELP-3500 Projector is an easy-to-use, portable presentation device with a VGA resolution that lets you project enhanced color images from personal computers and video equipment, such as VCRs, video camcorders, and video disc players. Portable, light-weight, compact The new power unit, circuit board design, and simple structure minimize the projector body almost to page-size length and width, and a weight of 14.8 lb (6.7 kg), which is about 2 lb (1 kg) lighter than conventional projectors....

2

3.2.14 Removing the Adjustable Foot Unit Prerequisite Complete the steps explained in sections 3.2.1, 3.2.4, 3.2.10, and 3.2.11. 1. Turn the adjustable foot counterclockwise about 40 times to remove it. 2. While pressing the foot lever, pull the foot axis upward to remove it. 3. Slide the upper side (foot lever side) of the compression spring to remove it. 4. Remove the foot lever pin then remove the foot lever When installing or removing the adjustable foot unit, do not fold or peel the foot...

Ccp2e13

Signals RT 0 7, GT 0 7, and BT 0 7, output from the main board, are converted into analog signals by the digital to analog converter DAC IC601 before being output to the driver circuit for the light valves. Timing signals for the monitor output from the main board are converted into the signals for the light valves LCDs by IC800 before outputting them. The sub-brightness circuit modifies the output level of the R G B analog signals while controlling the lamp circuit for the analog display...

Fu502 Fu503 Fu504 Fu505

When power is turned on, the driver board activates the reset signal, which is controlled by IC601, and the CPU reads the program from flash ROM and writes it into RAM IC303 . Then the CPU sets the functions based on the program and projects the initial image. The digital video interface IC201 from the video board generates timing to project the image data received or executes data bit conversion A D to write the received analog image data to SRAM. The memory controller IC302 performs read...