Clarity Wildcat WN-4030-S User manual

GuideService
Wildcat Series
WN-4030-S
WN-4030-SE

WN-4030-S
WN-4030-SE
Wildcat Series
40" Display Wall Unit
Service Guide
070-0050-01
18 April 2003

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© 2003 by Clarity Visual Systems™, Inc.
All Rights Reserved.
Contents of this publication may not be reproduced in any form without permission of Clarity Visual Systems,
Inc.
Trademark Credits
Windows™ is a trademark of Microsoft Corp.
Clarity's Big Picture™ is a trademark of Clarity Visual Systems, Inc.
All other names are trademarks or registered trademarks of their respective companies.
Disclaimer:
The information contained in this document is subject to change without notice.
Clarity Visual Systems Company makes no warranty of any kind with regard to this material. While every pre-
caution has been taken in the preparation of this manual, Clarity Visual Systems shall not be liable for errors or
omissions contained herein or for incidental or consequential damages in connection with the furnishing, per-
formance, or use of this material.

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Table of Contents
1SomeBasicInformation…1
1.1 About the WN-4030 … 2
1.2 Your Safety Is Important … 4
1.3 Removing the Screen … 6
1.4 ESD Can Kill Equipment … 8
2 Troubleshooting the Problem … 11
2.1 What Kind of Problem Is It? … 12
2.1.1 Normal Startup Sequence … 14
2.1.2 Startup Problems … 16
2.1.2.1 Using the Remote Control and LEDs … 18
2.1.2.2 How to the Use Menu Chains … 20
2.1.2.3 How to Read On-Screen Status Code … 22
2.1.2.4 How to Read the Inside LEDs … 24
2.1.2.5 How to Read the Status Menu … 26
2.1.2.6 How to Get to the Service Menu … 28
2.1.3 Image Problems … 30
2.1.3.1 Loop-Thru Has Limits … 32
2.1.3.2 How Mode Detect Works … 34
2.1.4 Cooling Problems and Solutions … 36
2.2 Functional Tests in the Field … 38
2.2.1 Is the Picture Acceptable? … 40
2.3 How To Get Technical Support … 42
3 Regular Maintenance … 45
3.1 Changing the Lamp from the Rear … 46
3.2 Replacing the Lamp from the Front … 48
3.2.1 Removing the Optical Engine … 50
3.2.2 Replacing the Optical Engine … 52
3.3 Changing the Air Filter … 54
3.4 Cleaning the Screen and Mirror … 56
4 Taking Apart a Wall … 59
4.1 Removing a Floor-Mounted Display … 60
4.2 Removing a Wall-Mounted Display … 62
5 Replacing Parts … 65
5.1 Where Everything Is … 66
5.2 Replacing the Power Supply … 68
5.3 Replacing the Electronics Module … 70
5.3.1 Installing the Big Picture Key … 72

5.3.2 Installing a Video Decoder Card … 76
5.4 Replacing Parts under the Light Shield … 80
5.4.1 Removing the Optical Engine … 82
5.4.1.1 Replacing the Thermal Cutoff Switch … 84
5.4.1.2 Replacing the Intake Fan … 86
5.4.1.3 Removing the LCD in Optical Engine 750-0605-00 … 88
5.4.1.4 Replacing the LCD in Optical Engine 750-0605-00 … 90
5.4.1.5 Removing the LCD in Optical Engine 750-0605-01 … 92
5.4.1.6 Replacing the LCD in Optical Engine 750-0605-01 … 94
5.4.2 Installing the Optical Engine … 96
5.4.3 Changing the Lamp Ballast … 98
5.4.4 Replacing the Exhaust Fan … 100
5.5 AC Power Entry Repair … 102
6 Reference Section … 105
6.1 Menu Structures, Wildcat S … 106
6.2 Menu Structures, Wildcat SE … 114
6.3 On-Screen Status Codes, Both Wildcats … 124
6.4 LEDs, Wildcat S … 126
6.5 LEDs, Wildcat SE … 128
6.6 Connector Diagrams … 130
6.7 Wiring Diagrams … 132
6.8 Specifications for the WN-4030 … 134
6.10 Technical Support Forms … 140
Index … 143

1
1 Some Basic Information
1.1 About the WN-4030 … 2
1.2 Your Safety Is Important … 4
1.3 Removing the Screen … 6
1.4 ESD Can Kill Equipment … 8

2
1.1 About the WN-4030
This manual covers both models of the Clarity Wildcat display for troubleshooting and parts replace-
ment. Parts are replaced at the module or “black box” level; there are no component level repairs
required.
The Clarity Wildcat comes in two types:
• WN-4030-S is the standard version. It uses an
800 × 600 LCD, but it also accepts 640 × 480
computer pictures. Optional inputs for C-Video
and S-Video are available, and these connectors
may be in the unit you are servicing. Clarity’s Big
Picture™ is an option that spreads one image over
a wall of displays.
• WN-4030-SE also uses an 800 × 600 LCD, but it
accepts inputs up to 1600 × 1200 and down con-
verts them to 800 × 600.
The two models, called Wildcat S and Wildcat SE,
have somewhat different menus, but in most other
respects they are the same.
Tools required
Fortunately, not many tools are required.
• a #2 Phillips screwdriver
• a flat-blade screwdriver – sometimes even a coin
will do the job for this
• 3/8" socket for the bolts that hold displays
together
•5/16" socket for the nuts that hold cable hole cov-
ers and brackets
Some general information about the WN-4030
• There is no electrical interlock on the screen.
Removing the screen does not turn off the high
voltage, and the lamp stays lit.
• There is an interlock on the lamp access door at
the rear. Opening this door turns off the high volt-
age and the lamp goes out.
• There is an electrical interlock on the light shield
that covers the optical engine. Removing this
shield turns off the high voltage, and the lamp
goes out.
• There is no electrical interlock on the other rear
access door, the one behind the electronics mod-
ule.
• The power supply is self-adjusting to 115V or
230V.
Lamp Life
The median life of the lamp in a WN-4030-S is
8000 hours. Half of any sample of lamps will last at
least this long. Some lamps, maybe half of them, will
not last this long. Median means “middle.” If you
could line up a bunch of lamps in the order they were
going to fail (assuming you could know this in
advance), the lamp in the middle would last 8000
hours.
For the lamps in a WN-4030-SH, the median lamp
life is 4000 hours.
A guide to this manual
This manual is divided into sections and subsec-
tions. In general, it is as good idea to read the parent
sections before trying to do something described in a
subsection. For instance, if you want to remove the
“gizmo-thingy,” as described in section 3.2.1.2, first
read sections 3.2 and 3.2.1.
Information about operations and RS232 com-
mands are found in the separate Wildcat S and Wild-
cat SE manuals, part numbers 070-0046-xx and
070-0082-xx.
Terms used in this manual
The words
•cube
•display
• unit
all mean a single WN-4030 display.
• WN-4030 or “Wildcat” means either type of Wild-
cat.

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Tools You Will Need
#2 Phillips screwdriver
flat-blade screwdriver
3/8" socket wrench
5/16" socket wrench
In this Service
Guide,
the words, “display,”
“unit,” and “cube”
all mean a WN-4030,
one of these
!

4
1.2 Your Safety Is Important
This list of safety warning and caution notes isn’t very long. Reading it could save you from getting an
electric shock, a UV radiation burn, or a heat burn.
These display units were designed with safety in
mind. However, if you don’t heed the safety warning
and cautions, you could get hurt. The safety warning
are on stickers in various places in and on the display.
they are reproduced on these pages so you can see
them all at once.
There are some other times you should be aware of
that relate to safety, things to keep in mind while
installing and using the displays:
• There is no electrical interlock for the screen.
Removing the screen does not turn off the AC
power or the lamp.
• There is a switch under the light shield.
Removing the light shield turns off high voltage
to the lamp. Do not bypass this switch.
• There is another switch behind the lamp access
door in the rear. Opening this door turns off
high voltage to the lamp. Do not bypass this
switch.
• If the displays are hung on a wall, the wall must
be strong enough to hold them. Each unit
weighs about 68 lbs (31 kg). Simply mounting
them into wallboard or wall paneling won’t be
adequate or safe.
• If the displays are standing on the floor, use the
optional base. Secure the bases to the floor and
to each other before stacking displays on them.
Then secure the displays to the base. the base is
not very deep, front to back, and a high stack
could tip over, injuring or even killing someone.
You may not need a base for one row of displays
on the floor, but if the displays will be stacked
two high, use the base. Very high stacks – over
four high – should be tied back to a supporting
wall.

5
FRONT
!
WARNING
HOT SURFACES NEAR
LAMP. SKIN BURN
HAZARD
Lamp housing label, seen from the rear.
When you see it, this label will appear upside down,
and the arrow will point down.

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1.3 Removing the Screen
The screen is held on by four spring-loaded clips. When the display is in a wall, insert a thin object
between the screens to bring out the built-in screen handles. Don't lift the display by the screen. When
you place the displays in a wall, use the external hand grips or the internal struts for lifting.
The screen is held on with four spring-loaded latches,
one near each corner.
To remove the screen from a single display
When it is standing alone, pull out sharply at the
four corners. You only need to pull out about one inch
to release the latch. The display is relatively light (68
lbs.), and four latches together are strong. It may be
necessary to have someone hold the back of the dis-
play as you pull forward.
CAUTION
Do not twist the screen as you remove it.
Twisting the screen may break the spring-
loaded latches. Pull straight forward. If one of
the latches still holds a corner, do not twist
the screen to get it loose.fio
To remove the screen from display in a wall
On Wildcats with glass screens, use a suction cup
to pull at the four corners of the glass, one corner at a
time. Pull out sharply just enough to release the
spring latch, about one inch or 25 mm.
On some Wildcats, you can use the built-in tabs.
The tabs are small nylon handles, one on each side of
the screen.
Use the screen puller tool, shown here. Slide the
tool between the screens and hook the tab to retrieve
it. The tab has points to hook or push to get it to turn
out. If you don't have the screen pullers, you can use
anything thin and plastic, such as a credit card.
You need to pull on the correct tabs. There will be
two tabs between each pair of screens. To pull a
screen, use the upper tab on the right side and the
lower tab on the left. Remember: High-right, Low-
left.
Pull sharply forward on the tabs. You may have to
put something, such as a tie-wrap or the screen puller
tool, through the hole in the tab to get a good grip on
it. Be careful not to scratch the screen.
Do not twist the screen as you remove it. If one of
the latches still holds a corner, do not twist the screen
to get it loose.
To replace the screen
, line up the screen with the four corners of the
chassis. Use the heel of your hand to press sharply at
each corner, snapping the latches in place.
Screen tethers
Some installations use wire tethers on the screen
for safety. The wires hold the screen on both sides.
You can still remove the screen and lower it to work
inside, and usually that is enough.
If you have to remove the screen completely,
remove the tethers from the chassis end and leave the
tethers attached the screens. The tethers loop around
a threaded stud on the chassis. The stud has a nylock
nut. The loop at this end of the tether is large enough
to come off over the nut.
When you replace screens like this, loop the wire
over the stud again, and do not tighten the nut.
Handling the displays
The display has two hand grips, one on each side.
Do not lift the display by the screen.
When the screen is off, you can use the two braces
inside, near the upper corners. These are handy when
lifting displays into a wall.

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1a. Use screen puller tool to push
the hooks on the tab … 1b … or hook the tab and pull it out.
2a. Pull the tab, resting hand against
next screen …
2
b … or pull the tab with a tie-wrap … 2c … or pull the tab with the
screen puller tool.
Low Left
High Right
When you remove a screen from a wall, use
the High tab on the Right
and the Low tab on the Left.
Screen tethers are looped over a stud on
the inside of the chassis frame.
Do not tighten this nut.

8
1.4 ESD Can Kill Equipment
ESD – electro-static discharge – can literally kill electronic equipment. The components in the
WN-4030, particularly the electronics module, are very susceptible to ESD. Take precautions by using
an approved grounding strap when handling these parts.
MOS-FETs and J-FETs (two types of field-effect tran-
sistors) are wonderful components in circuits. They
provide high amplification with very little power con-
sumption, but they are extremely vulnerable to static
discharge. These components are used in the mod-
ules (electronic boxes) in this product.
Static electricity can easily build up in your body,
and you won’t even know it. Rubber-soled shoes on
vinyl floors, walking across carpet or rugs, even swiv-
eling in your chair can build up enough static electric-
ity to zap (kill) a FET. If you kill the FET, you kill the
module it is in.
To prevent electro-static discharge (ESD)
, use a wrist ground strap whenever you remove
and handle any of these modules:
•theelectronics module
•thelamp ballast
•thepower supply
Before you remove any module listed above, connect
your wrist strap to the main chassis.
Before you install a new module, connect your wrist
strap to the main chassis.
If you carry the module, connect the wrist strap to a
ground point on the module.
When you pack a module for shipping
, use an anti-static bag, if possible. If you don’t
have an anti-static bag, wrap the module in alumi-
num foil before packing it.
Never, never
pack the bare module in loose, styrofoam "pea-
nuts." When these styrofoam pieces touch the con-
nectors, they can easily zap a FET.

9
ESD Precautions
for handling electronics modules,
power supplies
and ballasts:
• When you remove an electronic "box," connect a wrist strap
to the main chassis before you start.
• When you walk with an electronic part, always connect a
wrist strap to a ground point (the case) on the part.
• When you ship a part separately, put it in an anti-static bag,
or wrap it in aluminum foil, before packing it in a carton.
• Never put the bare, unwrapped device in an ordinary plastic
bag or styrofoam of any kind.

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11
2 Troubleshooting the Problem
2.1 What Kind of Problem Is It … 12
2.1.1 Normal Startup Sequence … 14
2.1.2 Startup Problems … 16
2.1.2.1 Using the Remote Control and LEDs … 18
2.1.2.2 How to the Use Menu Chains … 20
2.1.2.3 Howto ReadOn-ScreenStatus Code …22
2.1.2.4 How to Read the Inside LEDs … 24
2.1.2.5 How to Read the Status Menu … 26
2.1.2.6 How to Get to the Service Menu … 28
2.1.3 Image Problems … 30
2.1.3.1 Loop-Thru Has Limits … 32
2.1.3.2 How Mode Detect Works … 34
2.1.4 Cooling Problems and Solutions … 36
2.2 Functional Tests in the Field … 38
2.2.1 Is the Picture Acceptable? … 40
2.3 How To Get Technical Support … 42

12
2.1 What Kind of Problem Is It?
Is this a startup problem or an image problem? Usually a black screen means its a startup problem. If
you can see anything at all, it is probably an image problem. This whole chapter divides the types of
problems into smaller and smaller groups, eventually leading you to another section of this manual.
Types of startup problems
Look through this list. If any of these things apply
to your situation, the problem is a startup problem.
• The lamp will not light.
• You can’t display any menus.
• When you press the LAMP ON button, the display
gives a triple beep, a very rapid beep-beep-beep.
• When you press the MONITOR button, nothing hap-
pens.
• When you press the MONITOR button, you see a
flashing, out-of-focus, colored light.
If you see any of the problems above, turn to “Startup
Problems” on page 16.
Types of image problems
If any of these things apply to your situation, the
problem is an image problem.
• The picture is noisy.
• There is a black area on the side or top or bottom
of the screen, and you can’t move the image into
this space with the Position control.
• There is a sign on the screen that says SOURCE
ABSENT.
•Youaredisplayingacomputer screen, and you
can’t see enough of the edges.
• The colors seem wrong.
• This display has different colors than the other
display in the wall.
• This display is darker or brighter than the others.
• When you press MONITOR, there is a red light, out-
of-focus, showing at the bottom of the screen. (No
problem. This is normal.)
• Image is distorted.
• Image is out of focus.
• Lamp is on, but you have no image.
• Image isn’t positioned on the screen properly.
• The lamp lights, but the screen is all white. You
can’t see any picture. When you press the MONITOR
button on the remote control, no menu appears.
If you see any of these problems, turn to “Image Prob-
lems” on page 30.