HP Ep7122 Home Cinema Digital Projector Users Guide

							Setting up
User’s Guide 11
Projector buttons and lights
Identifying the projector buttons and lights
Item Function
1Focus ring Focuses at distance of 1 to 10 m (3 
to 33 ft).
2Zoom ring Enlarges picture size from 100% to 
116%.
3Source  button Displays picture from the next input 
port.
4Picture mode button Selects the next picture and color 
combination—can be customized.
5Menu button Opens or closes the on-screen 
projector menu.
6Navigation buttons: up, down, left, 
right, and okSelect items in the projector menu.
7Volume adjustment Raises or lowers the sound level.
8Keystone adjustment Adjusts picture to eliminate slanted 
sides.
9Hide button Blanks picture, mutes speaker. 
						

							12 User’s Guide
Setting up
Back panel
:Power button Turns the projector on or off.
;Lamp indicator light Warns if the lamp is bad.

						

							Setting up
User’s Guide 13
Remote control
✎
Before using the remote control, install two AAA batteries. See “Replacing 
the battery in the remote control” on page 45.
4Composite-video input port Connects composite-video source.
5Power cord socket Connects power cord to projector.
6Component-video input port 
(YPbPr)Connects component-video source.
7Audio-in port Connects stereo audio source.
8Service port For service use only.
Identifying back panel components (Continued)
Item Function 
						

							14 User’s Guide
Setting up
Accessories
Enjoy more from your home theater with HP projector accessories. You can 
purchase accessories at http://www.hp.com or through your projector dealer.
■HP ceiling mount kit—enables you to simply and discreetly install your 
projector on the ceiling.
■HP mobile screens with built-in handles—designed to be easy to carry and 
set up anywhere you need them.
■HP power cables—allow you to connect in any region.
■HP cables—allow you to connect all audio-video equipment.
■HP replacement lamp—brings your projector up to factory-fresh brightness.
Identifying features of the remote control
Item Function
1Power button Turns the projector on or off.
2Keystone adjustment Adjusts the picture to eliminate 
slanted sides.
3Source button Displays picture from the next input 
port.
4Picture mode button Selects the next picture and color 
combination—can be customized.
5Menu button Opens or closes the on-screen 
projector menu.
6Navigation buttons: up, down, left, 
right, and okSelect items in the projector menu.
7Volume adjustment Raises or lowers the sound level.
8Mute button Turns sound on or off.
9Hide button Blanks picture, mutes speaker.
:Infrared lens Sends signal from the remote 
control to the projector. 
						

							Setting up
User’s Guide 15
Setting up the projector
Planning your layout
Consider the following suggestions when planning your room layout:
■Select the projector and screen positions and the screen size according to 
your room layout and the distance chart below. The zoom control on the 
projector gives you some flexibility.
■Be sure the projector is centered on the screen and perpendicular to it. 
Otherwise, the picture might look lopsided.
■For the best picture, consider purchasing a quality projection screen. Some 
screens are designed for wide-angle viewing, while others are designed to 
concentrate brightness in the center. A flat surface colored white or light 
gray will also give acceptable results.
■For the most comfortable viewing, center your seating around the projection 
line-of-sight. Depending on the screen material, viewing from far off center 
might be unsatisfactory.
■The best viewing distance is roughly the same distance from the screen as 
the projector, but personal preferences vary widely.
■If possible, place the bottom of the screen slightly above the level of the 
projector. Or you can mount the projector upside down on the ceiling (see 
“Installing on the ceiling” on page 47).
■Design the room so you can control the ambient light. Most people prefer 
viewing with minimal lighting, but you can have acceptable results if you 
limit ambient light on the screen. Bright room lighting might cause a 
washed-out picture.
■The most common video source is a DVD player, but sources can also 
include devices, such as an audio/video receiver, VCR, hard disk video 
recorder, video gaming device, or satellite receiver.
■Depending on your personal setup, try to locate devices to minimize the 
lengths of cables connecting them to the projector. If any cable is more than 
3 m (10 ft), consider using high-quality, low-loss cables for best video and 
audio quality.
■For the ultimate home-theater experience, consider including a 5.1 surround 
sound system, such as a Dolby Digital system. This system has five speakers 
and a subwoofer.
■For an external sound system, see the following diagram for a possible 
speaker layout. Place all front speakers at the same distance from the 
listener. Place the subwoofer near a wall or corner. Place surround speakers 
at least as high as the listener’s head. Experiment with the speaker 
placement. 
						

							16 User’s Guide
Setting up
✎
For best picture quality, place the projector 1.5 to 5 m (5 to 16 ft) from the screen. 
						

							Setting up
User’s Guide 17
Image size relative to distance from the screen—ep7110 series
Image size (diagonal) Image size (width) Distance (lens to screen)
(inches) (meters) (inches) (meters) (inches) (meters)
30 0.8 24 0.6 41 to 48 1.1 to 1.2
40 1.0 32 0.8 55 to 64 1.4 to 1.6
60 1.5 48 1.2 83 to 96 2.1 to 2.4
80 2.0 64 1.6 110 to 128 2.8 to 3.3
100 2.5 80 2.0 138 to 160 3.5 to 4.1
120 3.0 96 2.4 166 to 192 4.2 to 4.9
150 3.8 120 3.0 207 to 240 5.3 to 6.1
180 4.6 144 3.7 248 to 288 6.3 to 7.3
200 5.1 160 4.1 276 to 320 7.0 to 8.1
240 6.1 192 4.9 331 to 384 8.4 to 9.8
270 6.9 216 5.5 372 to 396 9.5 to 10.0
Image size relative to distance from the screen—ep7120 series
Image size (diagonal) Image size (width) Distance (lens to screen)
(inches) (meters) (inches) (meters) (inches) (meters)
30 0.8 24 0.6 43 to 50 1.1 to 1.3
40 1.0 32 0.8 58 to 67 1.5 to 1.7
60 1.5 48 1.2 87 to 101 2.2 to 2.6
80 2.0 64 1.6 116 to 134 2.9 to 3.4
100 2.5 80 2.0 145 to 168 3.7 to 4.3
120 3.0 96 2.4 174 to 202 4.4 to 5.1
150 3.8 120 3.0 217 to 252 5.5 to 6.4
180 4.6 144 3.7 261 to 302 6.6 to 7.7
200 5.1 160 4.1 290 to 336 7.4 to 8.5
240 6.1 192 4.9 348 to 400 8.8 to 10.0
270 6.9 216 5.5 391 to 400 9.9 to 10.0 
						

							18 User’s Guide
Setting up
Connecting power
1. Place the projector on a stable platform located 1 to 10 m (3 to 33 ft) in front 
of the screen. Ideally, the platform should be lower than the bottom of the 
screen.
2. Connect one end of the power cord to the back of the projector 
1 and the 
other end to a grounded electrical outlet 2. 
If you want to permanently install the projector on the ceiling or behind the 
screen, see “Installing the projector” on page 47. 
						

							Setting up
User’s Guide 19
Connecting a video source
Many video devices have more than one type of output port. When you connect 
the device to the projector, choose the connection that provides the best picture 
quality. Relative picture qualities are indicated by stars in the following diagram. 
If you have several video sources, you can connect them to the different ports, or 
you can connect them to an audio/video receiver and connect the receiver to the 
projector (see “Connecting several video sources” on page 26).
Only the S-video and composite-video cables shown in the following sections are 
included with the projector. A DVI port is available only on certain models.
✎
If you already have a home theater system with a TV, you can probably connect the projector in place of the TV as the viewing device. 
						

							20 User’s Guide
Setting up
Connecting a component-video source
Examples: Cable box, DVD player, satellite receiver, and audio-video receiver
Requires:
■Component-video cable
✎
■Many DVD players and other high-quality video devices provide 
component video output. The three RCA connectors might be labeled 
YPbPr or YCbCr.
■If possible, configure the video source to use progressive scan output, 
such as 480p, 575p, or 720p. For additional information, refer to the 
user documentation provided with the video source.