AUDIO VISUAL TRAINING PRESENTATION
Covering the basics and troubleshooting equipment.
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Types of Cables:
AC, RCA, RF, BNC, XLR, ¼”, mini,
VGA, “D” Plug, network, combination
Some cables are video cables, some are audio cables.
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Which cables are for audio and which cables are for video?
Can any of them be for both?
RCA Can be used for video or audio signals. When you
Separate video from audio, that is a component signal. Each
“component” has it’s own cable.
BNC are video cables. We mostly use
This with some of the vcrs we have here.
XLR are AUDIO cables. We use these with
Our microphones.
RF, or radio frequency cable, transmits both audio
And video in the same cable. This is known as a composite
signal When everything is combined in one cable. We use this
on most tv/vcr connections.
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Does it affect the signal if you combine cables to make them longer?
For what we do, most of the time we can combine cables without
Having the signal compromised. However, some cable runs are affected
When they are too long, especially VGA and video cables.
Can cables go bad?
Yes! Cables can go bad. This is why it is important to properly store
And coil cables. The wires inside can get twisted and break.
How do you troubleshoot a cable?
You exchange the cable in question with another cable. If the new
cable works, then you most likely have a bad cable. Throw all bad
cables away! There is no use for a bad cable. Remember, too, that
frayed cables are potentially dangerous. Do not use questionable
cables.
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Can you convert one kind of cable to another?
Yes! But only certain kinds. On the next page is a
Photo of various kinds of adapters. There are many
Different kinds of audio and video “ends” and you
Can convert between them. For example, it is very easy
To change a mini audio cable into an RCA cable or
Even a 1/4 “ cable. You have to match the cable to the
Input of the equipment you are using. If you have a vcr that
Only takes RCA cables for the video input, but you only have
a bnc cable for Video, you can convert the BNC to an RCA
with an Adapter. On the next slide I will go over the types of
Adapters we use here.
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ADAPTERS
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Adapters, another view
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OVERHEAD PROJECTORS
OVERHEAD PROJECTORS HAVE MANY PARTS. I WILL GO
OVER THOSE PARTS AND HOW TO CHANGE LAMPS AND HOW
TO CLEAN THEM. MOST OF OUR OVERHEAD PROJECTORS ARE
MADE BY 3M OR APOLLO. I WILL SHOW YOU THE 3M. THE
TIPS ON CLEANING AND CHANGING LAMPS ARE THE SAME
NO MATTER WHICH BRAND IT IS. ONLY THE VARIOUS PARTS
OR BUTTONS MAY BE IN A DIFFERENT PLACE. ALMOST ALL
OF THE OVERHEADS WE USE ON THIS CAMPUS HAVE A CAPACITY
FOR TWO LAMPS , OR “BULBS”. ONLY THE OLDER MODELS THAT
YOU MIGHT RUN INTO IN THE NEW BUILDING ( LAW DEPARTMENT)
MAY HAVE ONLY ONE LAMP CAPACITY. THESE ARE PROBABLY
PROJECTORS THEY HAVE HAD FOR YEARS AND JUST MOVED OVER
THERE WITH THEM WHEN THEY MOVED INTO THE BUILDING.
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The on/off switch to the right pushes in to turn on or off. To the left is the
Lamp changer. If lamp number 1 goes out, turn the knob to lamp 2.
( or vice versa). There is also a small switch to the right of the lamp changer
That controls the brightness. You can make it very bright, or less bright. Very
Bright is best. Please Note: If the door to the lamp changer is left open or is
Not closed all the way, the projector will not come on! This is a safety feature!
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To the right of the lamps, you will see the diagram that tells you what type
Of lamp this projector uses. ONLY USE THE RECOMMENDED LAMP!
What happens if you put the wrong lamp in?
Depending on what you put in there, many things can happen. It could blow
Out immediately, it could explode, it could damage the overhead so that
It cannot be used. Please be careful what you put in the projectors!
The lamp are seated in the socket below. Please do not touch the inside of
The lamp. Oils from fingers cause the lamp to overheat and blow out. Be sure the
Lamp is seated firmly in the socket.
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To open the top to change the lamp, you pull up on the switch labeled below
And pull up. The release shown below releases the arm of the overhead. To
Focus the projector, turn the focus knob forward or backward until
The picture is sharp.
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How do I change the lamp?
Very carefully! Lift up on the lever holding the lamp in place gently and remove
The lamp that is burned out. Put the lever back down and gently place
The new lamp in the socket. You need to press firmly down until it is set
In the socket well. Be sure you have the right lamp!
How do you know what kind of lamp it takes?
Look inside the projector to the right of the lamps and you will see the lamp
Model you should be using. Only use this lamp! The lamp models are Letters,
such as EXR or FXL or EYB. Be sure you use the correct one.
What happens if you put in the wrong lamp?
Many things can happen. The lamp could
explode, burn out right away,
Overheat, burn out the socket, or cause a fire.
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Why does the light from the overhead look orange?
Check to make sure the brightest setting is chosen. If it still looks orange
The lamp is probably getting old and wearing out. If it is very dim, change
The lamp and that should take care of the problem.
I just changed the lamp and it blew out right away. Why did it do that and
What should I do ?
Sometimes a piece called the diode
burns out. This regulates the voltage
Running through the projector. This
will make lamps burn out immediately.
Do not add any more lamps, and place
it in the office for repair. Remember to
Always check the overhead once you
change the lamp.
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FUZZY?
If you are suddenly getting only a blurry round spot from your overhead projector and no readable image, your
fresnel lens is probably installed upside down. While this won't happen by itself, it's a common problem for those
who have tried to clean the dust out of their overhead recently. The typical overhead projector has a top piece of
glass (stage glass) and just below that is a plastic lens with lots of circular lines on it (the fresnel lens). Most fresnel
lenses are marked on one side indicating which side goes toward the lamp. If you know how to remove it, just take
it out and reinstall it the correct way. By the way, never use glass cleaner on the fresnel lens, it can destroy the
plastic lens. Clean the fresnel lens with canned air. But no matter what you do, be very careful because this lens is a
very expensive part of your projector.
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Document Cameras
There are Elmo document Cameras in 120, 121, 221, and 225 as well as the Vtel room for
teleconferencing. You use base light for overhead transparencies, and you use top lamp
For opaque objects, such as a sheet of paper or an object. Basically, you use the bottom
Lamp for transparencies like you use on an overhead projector and the top lamp for
Everything else. The top lamp acts like a camera and shows what you are doing or what
You want to project. This unit is connected to the console with a BNC connection which
Means it is a video signal. This means it switches as a video signal in the console.
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We use many types of LCD projectors. Some we use for check out, some are
Mounted in the classrooms. I will go over some of the basics of each one.
Menu for LCD
Goes from harddrive or laptop into
The projector @ computer in with a
VGA cable.
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The Infocus has a dedicated
Cable that MUST be used
And can only be used with
The Infocus. A regular VGA
Will not work with this. It will
Handle both MAC and PC
Operating system with the
Switch of the bar and by
Turning the cable to the
Computer around.
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This is the Sharp. We use this one for Checkout. You can see the inputs
For video and audio are on the side inside the panel. On top, you have
The menu and the volume control and the input select to chose video
Or computer.
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This Sharp is mounted in 120, 121, 221, and 225 in the new building. As you can see, the power
lights, the lamp light and the temperature Lights are located on the front of the projector. The
maximum lamp hours is 1500 hours. The red indicator on the front of the projector will flash red
when the projector reaches 1400 hours. It will flash yellow when it is time to change the bulb. The
projector will power up, but will cut off within 5 minutes.. It will not allow you to use it after 1500
hours. To change the lamp, the projector has to be taken down from the ceiling. If this happens
during a class, just take a portable projector over there until we can get in the class
and take the projector down since this takes some time.
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Just use portable projectors any time a lamp goes out during class. Be sure to send a message to the listserv if this
happens, too, so faculty will know to contact 3-8226 for help if they want to use an LCD projector.
No Signal?
If there is no signal to the projector in the smart rooms, and you
know all the connections are good, please make sure the power
distribution amp is on in the black box. This runs the power for
the inline box in the wall. If the inline box is not on, the signal
won’t get to the projector.
Check your VGA cable. Are all your
cables seated properly? Are there bent
pins?
Off-Centered?
If the image is ‘cut off’ on the screen, check the horizontal control
( blue knob on the inline box) to adjust the image left or right.
Scrambled picture?
All of the projectors in classrooms are 800X600 resolution.
Many laptops are 1024x768 or even higher now. You may need to
change the laptop resolution if the projector isn’t reading the signal
well.
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THE INLINE BOX
Computer Audio cable goes here ,
Adjusts , screen position
VGA cable goes here c
i.e. For CD player
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Some of the older laptops do not send a signal strong enough to display on the computer monitor and the lcd
projector. Try taking the signal off the computer monitor and sending it full strength to the lcd projector.
(Check the laptop for the correct keys to send the signal to the projector.. i.e., Function / F5 etc… )
The refresh rate may need to be changed on your computer. Many of the
latest laptops use graphic adapter hardware that is capable of producing an
output at various refresh rates. You should try any other refresh rate
available but it is best to start as close to 60Hz as possible to be compatible
with the largest number of projectors. If you are using Windows 95, the
refresh rate is sometimes located on a tab under Display Properties. (To get
to the Display Properties under Windows 95, right click on the desktop and
select Properties.) Under Windows 98 go to the Settings tab and click the
Display or Monitor icon. Go to Settings and click the Advanced button.. It
may be under the tab for Adapter. Check around.
Filters
A dirty filter will cause your projector to overheat and shut down and shortens lamp life. Even worse, the dust
that collects on your filter will eventually make its way into your projector and deposit itself on the red, green
and blue LCD panels. Once this happens you will have colored spots in your image and your projector will
need a professional cleaning.
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DHCP SETTINGS FOR NETWORK CONNECTIVITY
1.
2.
3.
4.
5.
6.
Right Click on Network Neighborhood and Select Properties
In the box where the installed network components are listed,
scroll down until you see TCP/IP followed by the name and
model number of your ethernet card.
Click on it once to select it.
Click on the “properties” button under the list.
One by one, click on the following tabs at the top of the TCP/IP
“Properties” window: IP Address, Gateway, DNS Configuration,
and WINS configuration.
Change the settings as follows:
IP Address: Click in the option button for “Obtain an IP Address
automatically.”
Gateway: Click on any gateway numbers listed under “Installed
Gateways” and click on the “remove” button.
DNS Configuration: Click in the option button for “Disable DNS”
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Yes! You can watch TV through an LCD projector!
Hook up the broadcast cable ( RF ) to the INPUT of the VCR.
Take an RCA dubbing cable or two RCA cables from the OUTPUT
Of the VCR to the INPUT of the LCD Projector.
It’s that simple! Chose Video on the LCD projector.
This is useful for when someone wants to watch a program on a large
Screen. Classrooms are not cable ready, however. One example of when
This could be used is when someone wants to set up a television in the
Lobby area near our office. Of course, there would have to be someone
Attending the area at all times. We can run a cable feed long enough to
Go to the lobby of the 3rd floor.
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WHAT IS KEYSTONING?
Keystoning is the effect you get when the projector, no matter what
Kind of projector you are using, is too low for the screen. The projected
Image will look like this:
Projector too
Low for
screen
This means
The projector
Is not sitting
Even.
With Screens that are already mounted, there is very little you can
Do about it being too low.
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We have 6 electonic classrooms in the new building. They are :
120, 121, 221, 225, 329, 332
All electronic classrooms have built in PCs, Podium mics, wireless
Lavalier mics, cassette players/recorders, VHS VCRs, mounted LCD
Projectors, and document cameras, and inputs for laptops. Only
329 and 332 are exceptions to this.
329 and 332 do not have podium mics, touch panels or cassette players.
They do have a wireless mic unit that can be checked out at the circ
Desk of the Law Library. They do not have a document camera, but
Have an overhead projector instead in those rooms.
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THE ELECTRONIC CONSOLE
MAIN POWER ,
UPS POWER
PROTECTOR
SWITCHERS
CASSETTE DECK
VHS
POWER UNIT6
PC
AXCENT CONTROL PANEL
SHURE MIC RECEIVER( for wireless unit)
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Electronic Classrooms continued….
Sometimes you have to check to see if the switcher is on the correct signal button.
Data switcher
Doc Cam and Video switcher
This is where you tweak the projector if necessary c
If this wire X is not connected, it
The control panel cannot
Control the VHS Deck.
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Amp is located behind this screen. The control panel controls the
Amp and you don’t need to get behind there.
Be sure this is on or you won’t get video signal to the LCD
This unit is the operating system of the control panel. When you choose options
On the control panel, you can see lights changing on this unit.
This unit is the “receiver” of the wireless mic unit. If you see lights dancing, you are
Getting a signal! This unit MUST be on to use the wireless mic.
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COMBINING ROOMS IN 120/121
THIS IS THE AMP RACK
IN THE CLOSET OF
ROOM ARL1-120. THIS
AMP CONTROLS THE
SOUND IN BOTH 120
AND 121 ROOMS.
ANYTIME YOU COMBINE
ROOMS, YOU MUST
ALSO COMBINE AUDIO
ON THE AMP RACK.
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The amps must be combined for both speech and program audio.
These controls adjust volume for the floor
Inputs.
REMEMBER TO SEPARATE THE CONTROLS AFTER AN EVENT!
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MORE
Sometimes you might need a backup plan for a microphone. In this case,you can
use the audio inputs that are in the floor of 120,121, or 225. The Volume controls
are on the rack in the closets of the rooms. ( For 120/121The are both on the amp
in the room 119 closet). You use an XLR cable to plug into the floor with one end
and a mic on the other end. This is where You would also plug in any extra mics,
such as for a panel discussion. The Controls on the amp are usually labled mics 3,
4, 5, and 6. You’ll have to Work with them to figure out which is which in the
floor input because they are not labeled in Room 120/121. In Room 225, the
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actual inputs are wires with XLR ends and those are labeled.
AND LAST, BUT NOT LEAST..( OR PERHAPS LEAST..)
This is something we rarely check out, but it is good to know
How they work and how to change the lamps and so on…
Carousel
,Forward and reverse
Release
Power and fan
Focus
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MORE SLIDE PARTS AND ACCESSORIES
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BELOW YOU SEE WHERE THE REMOTE PLUGS INAND WHERE THE MODULE
THAT HOLDS THE LAMP GOES. THE REMOTE CONTROLS FORWARD,
REVERSE AND FOCUS OF THE SLIDES. IF THE LAMP BLOWS WHILE YOU ARE
USING IT, IT IS BEST TO JUST SWITCH OUT THE MODULE BECAUSE THEY
ARE TOO HOT TO CHANGE IMMEDIATELY. THEY NEED TO COOL DOWN.
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Congratulations! You have made it through 3 full hours
Of technical jargon and training!
Comments???
Do you want more???
Write down other areas you wish to learn about and we
will do this
Again!!
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INDEX AND TROUBLESHOOTING GUIDE
1.
Types of Cables : 2-10
1.
Photos : 2-5
2.
Descriptions : 6
3.
Problems with cables : 7
4.
Converting cables/adapters : 9,10
2.
Overhead Projectors: 11-17
1.
Basics : 11
2.
Changing brightness/switching lamp : 12 ( troubleshooting )
3.
Changing burned out lamp/how to know what kind : 13
4.
Troubleshooting/how to operate 14-17
3.
4.
Document Camera : 18 : How to use them.
LCD Projectors: 20-27
1.
Hooking the projector up: 20
2.
Types of Projectors we have: 21-23
3.
Troubleshooting : 24-26
4.
Inline Box: 25, 26
5.
DHCP Settings : 27
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INDEX CONTINUED..
5.
Can I watch TV through an LCD projector? : 29
6.
Why is the image lop-sided?: 30
7.
Electronic Classrooms ( Arlington ) 31-37
Please see photos of the Electronic console for descriptions of
Equipment and what each one does.
8.
How do you hook up extra mics in Room 120/121 in the New Building? : 37
9.
Slide Projectors : 38 -40
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