HP Ep7120 Home Cinema Digital Projector Users Guide

Adjusting the projector
User’s Guide 41
Sound menu
Setup menu
Help menu
Sound menu
Mute Turns off the projector’s speaker.
Volume Adjusts the loudness of the speakers.
Internal speakers Sets whether the internal speakers are turned on.
Reset sound settings Restores sound settings to their default settings.
Setup menu
Language Selects the language used by the on-screen menu.
Projector position Adjusts the picture to match the orientation of the 
projector: upright or upside-down, in front of or behind...

42 User’s Guide
Adjusting the projector 

User’s Guide 43
4
Maintaining the projector
Getting the projector status
To get the projector status, press the menu button on the projector or remote 
control and go to Help. This screen shows information and status for the 
projector.
Cleaning the projector lens
You can clean the front lens of the projector using the following 
recommendations. You cannot clean any of the internal surfaces.
■To minimize the risk of damaging or scratching the lens surface, blow dust 
particles off the lens with clean,...

44 User’s Guide
Maintaining the projector
Replacing the lamp module
As the projector operates over time, the brightness of the projector lamp 
gradually decreases and the lamp becomes more susceptible to breakage. You can 
install a new lamp at any time to bring the projector up to factory-fresh 
brightness. We recommend replacing the lamp if a warning message is displayed.
Å
Replacing the lamp module requires special consideration:
■To reduce the risk of injury, be careful when removing the lamp module...

Maintaining the projector
User’s Guide 45
5. Insert the new lamp module into the projector and tighten the two screws.
6. Insert the tab on the front cover into the slot in the projector and close the 
cover.
7. Tighten the screws that hold the cover.
8. Turn on the projector. If the lamp does not turn on after the warm-up period, 
try reinstalling the lamp.
9. Press menu, go to Setup > Reset lamp hours, and press ok.
Replacing the battery in the remote 
control
1. On the back of the remote control, push...

46 User’s Guide
Maintaining the projector 

User’s Guide 47
5
Installing permanently
Installing the projector
Installing on a table
This installation is covered in detail in Chapter 1. See “Setting up the projector” 
on page 15 for more information.
Installing on the ceiling
Å
WARNING: To minimize the risk of injury from improperly installed 
equipment, it is recommended that a professional installer performs the ceiling 
installation.
1. Attach the projector to the ceiling using an HP L1733A ceiling mount kit. 
The base of the projector must by...

48 User’s Guide
Installing permanently
Connecting to a room controller
If your projector has a serial port, you can connect the projector to a room 
controller using a serial (RS-232) cable. After you program the room controller 
using the following commands, you can use the room controller to operate the 
projector and other components of your home theater.
Serial connections
The serial port on the projector uses a standard serial (RS-232) cable:
■Pin 2: data sent to the projector (RxD)
■Pin 3: data...

Installing permanently
User’s Guide 49
The following table shows the specific syntax to use for various requested tasks.
In general, every request sent to the projector generates one or more notification 
messages, which are sent to the room controller. Actions initiated by the projector 
can also generate notifications.
The projector always sends notifications whenever a setting changes, whether as 
the result of a request from a controller, or as the result of an action, such as a 
button press or menu...

50 User’s Guide
Installing permanently
■Invalid parameter—command with current value
■Action command with unnecessary parameter—action command
■Action command that is unavailable—action command
The following simplified example shows how the projector typically responds to 
a request to change the active input source. Note that the three latter notifications 
are delayed.
Room controller commands
In the following tables, if the parameter listing for a particular command is 
“None,” that command requires...