Manual for HC4900

Manual for HC4900

Brand: MITSUBISHI ELECTRIC

Category: Projector

Document Type: Manual

Language: EN

Uploaded: Nov. 21, 2025, 8:05 p.m.

Warranty Information

Refer to the warranty information provided separately for details on the projector's warranty coverage.

Preparing your projector

  • Checking accessories: Ensure all provided accessories (cables, remote control, batteries, manuals, etc.) are present.
  • Inserting batteries into the remote control: Open the back lid, insert two AA batteries (R6P) with correct polarity, and close the lid. Replace batteries when the remote is slow to respond.

Setting up your projector

  • Screen setup: Install the screen perpendicularly to the projector and ensure the projector lens is at the same height and horizontal position as the screen center. Avoid direct sunlight on the screen.
  • Basic setup: Determine the distance from the screen to the projector based on the desired image size. Ensure adequate ventilation to prevent overheating.
  • LENS SHIFT button: Use this button to adjust the projector's position and move the image up, down, left, or right.
  • Adjusting the projection angle: Use the two adjustment feet on the bottom of the projector to tilt the projector for the appropriate angle.
  • Front projection, ceiling mounting: Requires a specific ceiling mount kit. Consult a specialist for installation.
  • Rear projection: Consult a specialist for installation. Set IMAGE REVERSE to MIRROR if needed.
  • TRIGGER terminal: Outputs a 12 V signal to control external devices like electric screens.

Viewing video images

  • Connecting to video equipment: Connect via VIDEO IN, S-VIDEO IN, or COMPONENT VIDEO IN terminals.
  • Connecting to HDMI or DVI-D: Use HDMI IN or DVI-D(HDCP) IN terminals for high-quality images. Supports HDCP.
  • Plugging in the power cord: Use the provided power cord and plug it into a grounded outlet.
  • Projecting images: Remove the lens cap, turn on the projector, select the input source, and adjust focus and zoom.
  • Setting the aspect ratio: Change the aspect ratio to match the input video signal (e.g., AUTO, 4:3, 16:9, ZOOM1, ZOOM2, STRETCH).

Viewing computer images

  • Connecting to a computer: Connect via RGB cable (analog) or DVI cable (digital).
  • Plugging in the power cord: Same as for video images.
  • Projecting images: Turn on the computer, projector, select input source, and adjust image settings.

Adjusting projected images

  • Use the SIGNAL menu to adjust tracking, sync, position, and other image parameters for computer signals.

Advanced features

  • Password function: Set a password to prevent unauthorized use (DISPLAY INPUT or MENU ACCESS modes).
  • Kensington Lock: Use a Kensington Security Standard connector for physical security.

Replacing the lamp

  • Replace the lamp when its brightness decreases or after approximately 5000 hours of use. Follow safety precautions carefully. Reset the lamp operation time after replacement.

Maintenance

  • Cleaning the air-filter: Clean or replace the filter regularly to prevent overheating.
  • Cleaning ventilation slots: Wipe with a soft cloth.
  • Cleaning the lens: Use a lens-cleaning brush or tissue.

Troubleshooting

  • Refer to the table for solutions to common problems like power issues, no image, power turning off, or incorrect display.

Indicators

  • Check the POWER and STATUS indicators for operation status and troubleshooting guidance.

Specifications

  • Details on display technology, resolution, input signals, dimensions, weight, and connectors.

Troubleshooting and error codes

Problem Solution
Power can not be turned on. Check whether the indicators are on or off and how they are lightning. POWER STATUS Solution ○ Off ○ Off Connect the power cord to the projector. Plug the power cord into a wall outlet. If any objects are blocking the air inlet or outlet grill, re move them and carry out the following. 1. Unplug the power cord from the wall outlet. ○ Off ○ Off 2. Make sure that the projector has cooled off. 3. Plug the power cord into the wall outlet. 4. Press the POWER button. ○= Blinking orange • If any objects are blocking the air inlet or outlet grille, remove them. • Don't expose the air outlet grilles to hot air emitted from a heating appliance. • Check whether the filter is clogged with dirt or dust. → Clean the filter, if clogged. • After the STATUS indicator stops blinking, press the POWER button. • If you unplug the power cord while the fan is rotating, the lamp may not turn on about one minute when you plug the power cord next time. ○= Blinking green • Press the POWER button several times. The lamp can't turn on again for one minute after it goes out. • Replace the lamp. (The lamp is at the end of its life.) Steady red ○ • Attach the lamp cover on the bottom. Off • Unplug the power cord from the wall outlet and contact your dealer. Steady red/green Blinking or Steady
No image appears on the screen. Check that the lens cap is removed. • It may take about one minute for the lamp to light up. • The lamp fails to light up on rare occasions. In such a case, wait for a few minutes and then try again. • If the projector was turned off before the lamp was cooled down sufficiently last time, the fan may start rotating and the POWER button may not work after the power cord is plugged. After the fan stops rotating, press the POWER button to turn back on the POWER indicator. • Check that the intake vent is clean. • Set SCART INPUT in the FEATURE menu to OFF. (See page 27.) • Check that the lamp cover is closed. (See page 36.) • Check that the cables connected to the external devices are not broken. • When an extension cable is being used, replace it with the supplied cable for check. • When images are displayed correctly, add an RGB signal amplifier to the extension cable. • Check the operation manual of the video device for its connection.
Power turns off. This problem may occur when the intake vent and/or exhaust vents are blocked. (In such a case, the STATUS indicator brinks orange.) → Remove the objects blocking the intake vent and/or exhaust vents and then carry out the following procedure. 1. Wait for the intake fan and/or exhaust fan to stop. (Wait until the STATUS indicator goes out.) 2. Unplug the power cord from the wall outlet. 3. Wait about 10 minutes. 4. Plug the power cord into the wall outlet. 5. Press the POWER button. When the STATUS indicator is steady red, it is indicating that the lamp should be replaced. Replace the lamp in this case. • Check that AUTO POWER OFF has been set to OFF. • If the lamp has deteriorated, it may go out after a while it illuminates.
The screen for entering the password appears. • PASSWORD FUNCTION in the FEATURE menu has been set to DISPLAY INPUT to enable the password lock. → Enter the password or contact the person in charge of management of the projector. (See page 34.)
"NO SIGNAL" is displayed. • Turn on the power of the connected device, or check whether there is something wrong with the connected device. • Check whether the external device output signals. (Check this especially when the external device is a notebook computer.) • Check that the cable connected to the external device isn't defective. • Check that the projector is connected to the external device using the correct terminals. • Check that the connected device is correctly selected as the input source. • When an extension cord is being used, replace it with the supplied cable and check whether images are projected correctly. If images are projected correctly, use an RGB signal amplifier along with the extension cord.
Projected images are shaking. • Check that the cable connected to the external device isn't intermittent. • Connect the cable's plug with the external device's connector firmly. • Press the AUTO POSITION button.
Projected images are displaced. Some computers output out-of-spec signals on rare occasion. Adjust the SIGNAL menu. (See page 33.)
Projected images are distorted. • Adjust the projector and the screen so that they are perpendicular to each other. (See page 10.)
Projected images are dark. • Adjust BRIGHTNESS and CONTRAST in the IMAGE menu. (See page 30.) • Replace the lamp. (See page 35.)
Projected images are blurred. • Adjust the focus. (See pages 17 and 22.) • Clean the lens.
Afterimages persist on the screen. • Press the or button on the remote control to eliminate flicker. • Adjust TRACKING and FINE SYNC. in the SIGNAL menu. (See page 33.) • Adjust BRIGHTNESS and CONTRAST in the IMAGE menu. (See page 30.) • Adjust the projector and the screen so that they are perpendicular to each other. (See page 10.) This phenomenon is improved by keeping projecting an evenly dark image. (Such "image burn-in" phenomenon where afterimages persist on the screen may occur if a stationary image is kept displayed on the screen for a long time.)
Red, blue, and green dots appear in projected images. Black dots appear in projected images. This phenomenon is unique to LCD projector and isn't a product malfunction. (A small number of pixels always stay on or off, which are not malfunctions. More than 99.99% of the pixels are effective.)
Fine streaks are seen on projected images. This is due to interference with the screen surface and is not a malfunction. Replace the screen or displace the focus a little. Vertical or horizontal streak noise may appear on the projected image, depending on the type of the DVD player or game console you use. In such a case, you can reduce such streak noise by enabling the LPF.
Projected images become wavy. • Connect the plugs of the cables to external devices securely. • Keep the projector away from devices that emit interfering radio waves. • Check that the cables connected to the external devices are not broken.
Hue is not appropriate. Tint in projected images is incorrect. • Check that COMPUTER INPUT in the SIGNAL menu is correctly set. (See page 28.) • Check that the cable connected to the external device isn't broken.
Different color tint. • When comparing images projected by two projectors, tints in the displayed images may be different because of variation between their optical components. This is not a malfunction. • When comparing the image projected by this projector with those displayed on the television or PC monitor, tints in the displayed images may be different because of difference in the range of color reproducibility. This is not a malfunction.
Only the motion areas in the images supplied from the computer aren't displayed. This is caused by the computer being used. Contact the manufacturer of your computer.
Projected images are obscured. • Match the output resolution of your computer with the resolution of the projector. For the method to change the output resolution of the computer, contact the manufacturer of your computer. (See page 43.)
Image remains freezing. When image from VCR is projected, it may remain freezing during speed search. This is not a malfunction.
The exhaust vents emit warm air. This air comes out after cooling the inside of the projector. You may feel hot, but this is not a malfunction.
The menu can't be used. The microcomputers inside the projector may be wrongly operating because of noise. → Press the POWER button to turn off the lamp and wait about 2 minutes. Then unplug the power cord from the outlet, wait at least 10 minutes, and plug the power cord back into the outlet. When the POWER button doesn't function, unplug the power cord from the outlet, wait at least 10 minutes, and then plug the power cord back into the outlet.
"TEMPERATURE!!" is displayed. This indication appears when the ambient temperature rises high. When the ambient temperature stays high, the lamp goes out. → Eliminate any causes of the rise in the ambient temperature.
The mark appears. This indication appears when the air inlet or outlet grille is blocked. When they are kept blocked, the lamp goes out. → Remove the objects blocking the air inlet or outlet grille. Clean the filter, if clogged.
The remote control doesn't function easily or at all. This mark appears when ineffective operation is carried out. This isn't a product malfunction. Check that the batteries are loaded in the remote control or the batteries are not weak. (See page 6.) Check that the remote control sensor isn't exposed to direct sunlight or fluorescent light. (See page 9.) Use the remote control within its operation range. (See page 9.) Use the remote control at least 10 cm away from the projector.
The buttons on the control panel (except for the POWER button) don't function. PASSWORD FUNCTION in the FEATURE menu has been set to MENU ACCESS to enable the password lock. → Cancel the password lock or contact the person in charge of management of the projector. (See page 34.)
If the following problem occurs after the lamp is replaced, check the following first. The projector does not turn on. • Fit the lamp cover securely. (See pages 35 and 36.) • Reset the lamp operating time. (See page 36.)
The STATUS indicator blinks. • Reset the lamp operating time. (See page 36.)
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