![]() The optics in a projector are responsible for transferring internal images onto a screen so you can view them. It is mounted onto a lens-shimming mechanism or adjustable base that allows you to adjust focus, perform keystone correction, and track magnification. The system focuses light from the lamp to the lens to produce the image you see.ĭepending on the model, the projection lens system can be located inside or outside the lamphouse. The projection lens system comprises an optical system created by connecting several lenses in a sequence. Let’s review each part and its functions: Projection Lens System The internal parts of a projector are central to image production and proper cooling of the system. Projectors also feature speakers to deliver the audio feed from the video signals and adjustable feet to adjust the projector’s height from the ground. It also has intake vents that let in cold air from around the projector to cool the internal parts. ![]() Projectors run hot after operating for a while, and the case is fitted with cooling vents to dissipate the heat. Security Slot/Safe Slot: Protects the projector from theft.HDMI Port: Used to input video signals from a source with an HDMI output port.LAN Port/Ethernet Port: Used to complete internet or wired network connections.USB Port: Used to plug small devices with USB males.Video In Port: Used to input video signals through the RCA cable from a video player.VGA Port: Used to input video signals from a PC or laptop with a VGA output port.Audio Output Port: Used to connect the system to external headphones and speakers.Other ports found on the outside of a projector include: The Power AC socket is the most important port on a projector because it allows the system to get power supply. If you cannot find your remote, the Menu button gives you access to the interface. Arrow keys allow you to navigate the system interface, and the Enter button helps you select settings. Projectors have several buttons on the case to help you manipulate and control the system. This configuration is especially common in smaller models. In some cases, the power supply can be housed internally, but it is usually present as a power adapter found outside the projector. The motorized lenses in the projector also use this power to manipulate the lens by driving the electric motors. The bulbs and mainboard in a projector require a power supply to function. The case is also where you will find the infrared sensor that receives signals from the remote control. The case houses the cooling fans that regulate the projector’s temperature and provides somewhere to mount electronics.Īdditionally, it also contains switches or control knobs that you can use to move the lens and control the image size and focus or vary the brightness and contrast. The internal parts of a projector are usually encased in a metal or plastic case for protection. ![]() They are also crucial to image production and the proper running of the projector. The external parts of a projector are designed primarily to protect the internal components or allow you to control the functions without tampering with the inside. Offset/Perspective Correction Mechanism.Trying to save a couple hundred dollars on lamps ended up causing nearly $5000 dollars of damage on a recent Sanyo PLC-XF46 that we repaired for a church in Southern California. These OEM lamps have been known to cause power fluctuations, leading to power supply failure, ballast failure, or even main board failure. Just because a website claims that they sell ‘OEM lamps’ does not mean that those lamps are original quality. Quality lamps can be quite expensive and we recommend only replacing the lamps when needed. Some projectors use more than one lamp, such as the such as the Sanyo PLC-Xf46, which uses 4. Often times, we receive calls from customers who have spent a few hundred dollars replacing their lamps, only to find that the lamp was not the cause of their discoloration, power on issues, or blinking status lights. We recommend replacing bulbs after 3000 hours of use, which is well outside the annual use range for most recreational projector users. While replacing the lamp can be done by the end user, it is important to realize that the lamp is usually one of the last things that needs to be replaced. High bulb hours will require a replacement of the bulbs in the unit. The likely culprit of a dim projector is the bulb.
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