1 Circuit configuration 11 PWB configuration

Used for the phase decode processing of the RGB video signals, the level adjustment, and the generation of various timing signals. Used for the level shift processing of the panel drive timing signals for the LCES PWB (SVGA) and the LCEX PWB (XGA), and also for the generation of panel auxiliary signals. The above-mentioned two types of PWBs are connected through the FFC (Flexible Flat Cable) cables of 40 pins (POSV) and 30 pins (POST).

12 Preliminary arrangements before adjustments

2) Remove the Main PWB Assy, the LCES or LCEX PWB Assy, and the Key PWB Assy. 3) Remove the Cover (suction air duct) Assy (Part No. 24FT7461), the Suction air duct (SK) Assy (Part No. 24FT7451), and the Optical cover (SK) (Part No. 24F32021). Taking out the filter Assy B in advance facilitates the removal of the optical cover (SK). 4) Mount the dummy load and turn on the power source circuit. 5) Zoom the lens to maximum image size. 6) Adjust the focus of the screen overall by means of the lens...

13 Method of shadow adjustment in each color

Vertical shadow adjustment for G and R (when the shadow color is magenta, cyan, or blue) CD Replace the FL vertical adjusting screw. (Part name Nylock screw (HLSS4*6), Part No. 24N04751) Then, follow the working procedures below by the use of a ball driver (opposite side 2.0mm). (2) Sufficiently loosen the FL vertical fixing screws (Part name special screw (PL-HM2.5*6), Part No. 12851741) (in 2 positions). (3) Loosen the FL horizontal fixing screws by one turn (Part name special screw...

16 Fl Sassyit1 Sassyit2 Sassybarrier 2 Separate Base Barrier 1 Separate Basethermostat

(1) Remove the two screws (T), and take out the (4) Remove the two screws and take out the BARTHERMOSTAT. RIER 1 (SEPARATE BASE). (2) Remove the two screws (2), and take out the IT1 (5) Remove the two screws , and take out the FL SASSY. SASSY. (3) Remove the two screws (3), and take out the BAR- (6) Remove the two screws , and take out the IT2 RIER 2 (SEPARATE BASE). SASSY.

1introduction

Introduction to the MultiSync VT440 VT540 Projector E-6 Getting What's in the Getting to Know Your MultiSync VT440 VT540 Projector E-8 Front Side Rear Side Top Terminal Panel Remote Control Setting Up Your Selecting a Using a Tabletop or Distance Ceiling Reflecting the Wiring Connecting Your Connecting Your Macintosh Computer E-19 Connecting an External Connecting Your DVD Connecting Your VCR or Laser Disc Player E-23 General Enlarging and Moving a Using the Menu Menu Menu Descriptions &...

1Lens Cleaner

* Cleaning fluid Use absolute alcohol. If moisture remains on the surface without drying soon after it is cleaned, use fresh absolute alcohol. Soak a clean cotton cloth or a sheet of commercial cleaning paper with the cleaning fluid. Hold it between your thumb and index finger, and start cleaning the lens at the center and circle the cloth or paper toward the edge, wiping off foreign matter out to the edge. Do not apply pressure on the lens surfaces while cleaning.

23 Replacement procedures

1) Remove the polarizing plate Sassy. Then start the work below for the polarizing plate sassy. 2) Take out the mounting metal fitting (POL) from the condenser lens Assy. 3) Mount a new polarizer on the new mounting metal fitting (POL). If the mounting metal fitting (POL) is attached with double coated adhesive tapes (in 2 positions), the mounting of the polarizer should be done after the removal of the peel-off paper. 4) For the item assembled as per 3) above, mount this item on the condenser...

33 Panel auxiliary signal

This signal output is generated from the LC panel signal processing circuit G A, YAMAG (IC3701), on the same main board (MAIN PWB). The panel auxiliary signal (3.3Vp-p) is processed for level shifting to the level (5.0Vp-p, (2.5V 7.5V)) required to pre-charge the video line in the LC panel by the aid of the level shift ICs (IC5201, 5202, 5203 IC6201, 6202, 6203) located on the LC driver boards (LCES PWB LCEX PWB). Since then, the processed signal is fed to the LC panel via the diamond buffer of...

41 Video signal processor block

The composite video signal passes through the 6dB amplifier (IC1100 MM1031XM) and the low-pass filter (FL1113), and enters Pin 41 of the video decode IC (IC1104 CXA2139S) at 1Vp-p. The NTSC and PAL signals are led to the IC's internal SW and 6dB amplifier, and the resultant output is fed to Pin 6. The signals are further sent to the 3-line Y C separator circuit (IC1101 TC9090AF). The signals from Y C separation are returned again to the video decode IC. The composite SECAM signal and the B W...

42 Sync signal processor block Mini DSUB 15pin input

The sync signal input entered in Pin 15 of the Mini D-SUB is sent to the amplitude limiter circuit. In this amplitude limiter circuit, the H V sync signal limited to 0.6Vp-p is applied to the sync signal processor IC (IC1006 M52347FP). In order to cope with the sync attenuation signals, the Sync on Green signal input is entered in the sync signal processor IC via the Sync chip clamp circuit and the AMP circuit. The DVD signal only is entered in Pin 43 of the video decode IC via IC1001, so that...

4yamag Ic3301

The YAMAG (IC3301) incorporates the various functions as specified below. Generation of the address decode and chip select signals Frequency measurement and interlace discrimination circuit I O port (3 x 8 bits) Beat cancel circuit (Frequency divider circuit, phase comparison, random generation) 2 1 sync signal and clamp pulse changeover and sync width variable circuit Fan rpm control circuit (2 systems of PWM) Remote control decode, key, external control mixing, and interrupt generator circuit...

Connecting an External Monitor

You can connect a separate, external monitor to your VT440 VT540 to simultaneously view on a monitor the image you're projecting. To do so 1. Turn off the power to your projector, monitor and computer. 2. Use a 15-pin cable to connect your monitor to the RGB Monitor Output (Mini D-Sub 15 pin) connector on your projector. 3. Turn on the projector, monitor and the computer. You can connect your projector to a DVD player with component outputs or Video output. To do so, simply 1. Turn off the...

Distance Chart

A Distance between the lens and the screen center C Horizontal throw distance between screen surface and the lens D Vertical distance between projector base and base of image E Vertical distance between projector base and screen center H Horizontal Screen Width A C cosa C (wide) 36.8712 x (diagonal screen size 0.92205) - 43.5689 C (tele) C(wide) x 1.2 D 1.45 x M - 62.9 E 62.9 + 5.5M M 1.25H 22.86 H Horizontal Screen Width A C cosa C (wide) (36.8712 x (diagonal screen size 0.92205) - 43.5689)...

Fire and Shock Precautions

Ensure that there is sufficient ventilation and that vents are unobstructed to prevent the build-up of heat inside your projector. Allow at least 3 inches (10 cm) of space between your projector and a wall. 2. Prevent foreign objects such as paper clips and bits of paper from falling into your projector. Do not attempt to retrieve any objects that might fall into your projector. Do not insert any metal objects such as a wire or screwdriver into your projector. If something should fall into your...

Lamp Replacement

To replace the lamp, follow all instructions provided on page E-33. Be sure to replace the lamp when the message The lamp has reached the end of its usable life. Please replace the lamp.appears. If you continue to use the lamp after the lamp has reached the end of its usable life, the lamp bulb may shatter, and pieces of glass may be scattered in the lamp case. Do not touch them as the pieces of glass may cause injury. If this happens, contact your NEC dealer for lamp replacement. Allow a...

Menu Elements

OK Button Cancel Button Solid triangle Menu windows or dialog boxes typically have the following elements Title bar Indicates the menu title. Highlight Indicates the selected menu or item. Solid triangle Indicates further choices are available. A highlighted triangle indicates the item is active. Tab Indicates a group of features in a dialog box. Selecting on any tab brings its page to the front. Radio button Use this round button to select an option in a dialog box. Check box Place a checkmark...

Picture Quality Decision Criteria

Judge units that satisfy the following criteria as acceptable. The pixel Mis-Convergence of the red and blue shall be as specified below in reference to the green. 1 pixel or less in the center area 1 pixel or less in the peripheral (Edge) areas Mis-Convergence of one quarter (1 4) or more from the above specifications (1 1 4 pixels in the peripheral area) may be acceptable, provided that the signal color of green registers with the pixels of the other colors and does not appear seriously poor...

Remote Control Battery Installation

Press firmly and slide the battery cover off. 1. Press firmly and slide the battery cover off. 2. Remove the old Lithium coin cell and install new one (CR2025). Ensure that the side with a + is facing up. The air-filter sponge keeps the inside of the MultiSync VT440 VT540 Projector free from dust or dirt and should be cleaned after every 100 hours of operation (more often in dusty conditions). If the filter is dirty or clogged, your projector may overheat. Turn off the power and unplug the...

Remote Control Features

Use this button to adjust Position-H V and Pixel Clock Phase for an optimal picture. Some signals may not be displayed correctly, or in some cases it may take some time for a source to switch between sources. 4 Select (AY Volume (+) (-) Buttons AY Use these buttons to select the menu of the item you wish to adjust. Use these buttons to change the level of a selected menu item. A press of the button executes the selection. When no menus appear, these AY buttons work as a volume control. When the...

RF Interference Warning

The Federal Communications Commission does not allow any modifications or changes to the unit EXCEPT those specified by NEC Technologies in this manual. Failure to comply with this government regulation could void your right to operate this equipment. This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential...

Setting up Your Projector

Your MultiSync VT440 VT540 Projector is simple to set up and use. But before you get started, you must first 2. Set up a screen or select a non-glossy white wall onto which you can project your image. Carrying the Projector Always carry your projector by the handle. Ensure that the power cable and any other cables connecting to video sources are disconnected before moving the projector. When moving the projector or when it is not in use, cover the lens with the lens cap.

Terminal Panel Features

RGB Input Connector(Mini D-Sub 15 pin) Connect your PC or other RGB equipment. Use the supplied signal cable to connect to a PC. Connect a VCR, DVD player, laser disc player, or document camera here to project video. 2. RGB Monitor Output Connector (Mini D-Sub 15 pin) You can use this connector to loop your computer image to an external monitor from the RGB input source. 3. Audio Input Output Mini Jack This is where you connect audio output from your computer. Or connect additional external...

Top Features

Use this button to select a video source such as a PC, VCR or DVD player. Use this button to adjust Position-H V and Pixel Clock Phase for an optimal picture. Some signals may not be displayed correctly or take time to switch between sources. 4 Select (AY Volume (+) (-) Buttons AY Use these buttons to select the menu of the item you wish to adjust. Use these buttons to change the level of a selected menu item. A press of the button executes the selection. When no menus appear, these AY buttons...

Using a Tabletop or Cart

Place your projector on a flat level surface at the optimal distance from the screen or wall so you realize the size image you want. (Avoid having bright room lighting or sun light directly on the screen or wall where you'll be projecting the image.) 2. Connect the power cable, remove the lens cap and turn the projector on. (If no input signal is available, the projector will display a background image.) 3. Ensure that the projector is square to the screen. 4. Move the projector left or right...

Using the Menus

NOTE An interlaced motion video image may be blurred while the menu is displayed._ 1. Press the Menu button on the remote control or the projector cabinet to display the Main Menu. 2. Press the AY buttons on the remote control or the projector cabinet to highlight the menu for the item you want to adjust or set. 3. Press the button or the Enter button on the remote control or the projector cabinet to select a submenu or item. 4. Adjust the level or turn the selected item on or off by using...

Introduction to the Multi Sync VT440VT540 Projector

This section introduces you to your new MultiSync VT440 (SVGA) VT540 (XGA) Projector and describes the features and controls. Congratulations on Your Purchase of The MultiSync VT440 VT540 Projector The MultiSync VT440 VT540 is one of the very best projectors available today. The MultiSync VT440 VT540 enables you to project precise images up to 300 inches across (measured diagonally) from your PC or Macintosh computer (desktop or notebook), VCR, DVD player, document camera, or even a laser disc...

Ceiling Installation

A Distance between the lens and the screen center B Vertical distance between the top of the supplied ceiling mount and the screen center C Horizontal throw distance between screen surface and the lens F Vertical distance between projector base and top of image H Horizontal Screen Width (inch) A C cosa B 94 + 5.5 x M C (wide) 36.8712 x (diagonal screen size 0.92205) - 43.5689 C (tele) C(wide) x 1.2 F 1.4516 x M - 94 M 1.25H 22.86 H Horizontal Screen Width A C cosa C (wide) (36.8712 x (diagonal...

3 Troubleshooting and adjustment procedures 31 Replacement of the Main Pwb

< Copying of the V-T data, ADJ data, Logo data, and Uniformity data> Let the PJ power supply stay in the STAND BY state and select the Data tab for servicing software. Make data read write according to the descriptions (1) and (2) below. Prior to the replacement, and as required, read the presently used data of the MAIN PWB and save them in the relevant file. (According to the type of fault, it may be impossible to save these data.) Designate the file name and save the data by clicking the...

43 RGBComponent signal processor and AD converter block

The video signal input entered in Pin 15 of the Mini D-SUB is fed to the A D converter IC IC3401 CXA3506R through the buffer circuit. In the case of a component signal, only the chroma signals Pb, Pr, Cb, Cr are entered after their levels have been lowered at the attenuator of -6B. In the A D converter IC, the video signal from the video decode IC or the video signal at Pin 15 of the Mini D-SUB is selected. After the contrast has been adjusted at the built-in analog amplifier, this signal is...

Lcex

Are the following signal inputs available at POSV connected with POSV of the MAIN PWB See the waveform diagram. Rch video signal 10Vp-p Gch video signal 10Vp-p Bch video signal 10Vp-p Are the following signal outputs available at the respective output pins and test pins of IC6201 or IC6202, IC6203 See the waveform diagram. Y shift register start pulse DY Y shift register transfer clock CLY, CLYB X shift register transfer clock CLX, CLXB X shift register start pulse DX X driver driving direction...

3 Top Cover Assystay Rfilter F

Vt540 Repair

1 Remove the five screws T , and take out the TOP COVER ASSY. 2 Remove the two screws 2 , and take out the STAY R. 3 Remove the FILTER F. Note Refer to P7-4 and P7-5. 1 Hold both sides of the set with both hands at Part A. Apply a force to Part B in the direction of the arrow diagonally toward the top of the set . In this case, the force being applied should be as low as possible in order not to damage the switch. 2 Confirm that the claw of C each side surface has been disengaged. 3 Remove the...

2 Equipment to be used and operating environments

Software for servicing adjustments Ser_99vt.exe Ver1.0 Attached files V-T Data, etc. Personal computer Enabled to actuate Windows95 or Windows3.1, and the serial port COM1 or COM2 or COM3 is of the D-SUB9pin. Video signal generator Auto-adjustment type Enabled to generate an output of NTSC split color bars 7 colors Component signal generator Auto-adjustment type Enabled to generate an output of 15kHz Component Video 60Hz split color bars 7 colors Serial cable Accessory for the PJ main unit...

5 Troubleshooting

This section helps you resolve problems you may encounter while setting up or using the projector. No light in High-Bright mode Blinking green in Eco mode The message Please wait a little appears The projector retries 3 times at an interval of 15 sec for max. 45 sec 3 minutes after lamp is turned on in Eco mode Fixed at High-Bright mode. Lamp mode can be changed on the menu Lamp has reached its end of life 2000 hours or over Steady red High-Bright mode Steady orange Eco mode Message appears on...

Better Reputation Better Profit

Before servicing this chassis, it is important that the service technician read and follow the Safety Precautions and Product Safety Notice in this Service Manual. SHOCK HAZARD - Use an isolation transformer when servicing. SAFETY USERS TROUBLE CIRCUIT CAUTION TO REDUCE THE RISK OF ELECTRIC SHOCK, DO NOT REMOVE COVER. NO USER-SERVICEABLE PARTS INSIDE. REFER SERVICING TO QUALIFIED SERVICE PERSONNEL. This symbol warns the user that uninsulated voltage within the unit may have sufficient magnitude...