CHAPTER 9. PARTS LAYOUT..............................................................................................36
Parts marked with "" are important for maintaining the safety of the set. Be sure to replace these parts with specified
ones for maintaining the safety and performance of the set.
This document has been published to be used
SHARP CORPORATION
for after sales service only.
The contents are subject to change without notice.
■Notes to service personnel
·Pictorials
·
This service manual and the product use a variety of pictorials in order to assure the safety of repair operations and of t he product
repaired.
· If those pictorials are ignored in repairing, the following troubles might occur:
· Understand the meaning of those pictorials and read this manual carefully before trying to repair the product.
DANGER:
WARNING:
CAUTION:
Failure to follow the instructions in the message may cause a serious accident or death.
Failure to follow the instructions in the message may cause a serious accident or death.
Failure to follow the instructions in the message may cause personal injury or damage to the asset.
·Meaning of symbols·Pictorial example
symbols mean the necessity of using caution.
symbols mean actions which are prohibited.
symbols mean actions to be required.
■Cautions in servicing
Locations which require a special caution carry safety instructions using labels and stamps on the cabinet, chassis and components.
When servicing, observe the instructions on such labels and stamps.
Electrical shockHot surface
Don’t touchRemove power plug
Electrical shock and burn
1. Prior to servicing, make sure to remove the power supply plug.
Electrical shock
2. Some parts inside the unit have a high voltage. Use caution to avoid an electri cal shock accident when servicing an energized
unit.
Use specified parts
3. The component parts of this unit have safety characteristics such as flame resistance and dielectric strength.
· Use replacement parts which have the same characteristics as those of the components parts used for this unit.
· In particular, component parts marked with ! in t he circuit drawing parts list are important for maintaining the safety of the
product. Make sure to use specified replacement parts.
Reinstall component parts in their original locations and return wires which have been rerouted for servicing purposes
to their original positions.
4. Some component parts use insulating materials such as tubes or tape for safety purposes, or are mounted, a bi t floated, on the
printed wiring board.
· When rerouting inside wiring or clamping the wires, use caution not to bring the wires too close to heating or high-voltage parts.
· Make sure to return inside wiring to their original locations.
Check for safety after servicing.
5. After finishing servicing, check whether the screws, parts, wires which have been removed for servicing are reinstalled properly.
In addition, check to see if you have not deteriorated parts around the part you serviced, and also check for insulation between
each of the attachment plug terminals and the external metal section.
·Cautions to be taken when making adjustments
WARNING CAUTION
1. Use caution to avoid shorts due to the probe of
an oscilloscope or jigs and do not touch highvoltage circuits directly.
(There is fear of causing a fire or your getting an
electric short accident)
·Cautions to be taken when replacing electrical parts
WARNING CAUTION
1. Parts marked with are important for
maintaining the safety of the product. Use
specified parts when replacemzent of such parts
is required. (There is fear of giving off smoke,
catching fire, or your getting an electric shock)
·Cautions to be taken when soldering
WARNING
1. Do not try to solder when the parts are energized
or the unit is turned on.
(There is fear of causing fire or your getting an
electric shock.)
2. Use caution not to touch heating parts like the
radiating plate directly.
(You could get a burn.)
2. Use caution not to damage t he LCD unit when
handling it.
2. Use caution not to damage peripheral parts and
lead wires (e.g., burning peeling of coating).
(There is fear of causing a fire or your getting an
electric shock accident.)
CAUTION
1. Use caution not to touch a soldering iron directly.
(You could get a burn.)
3. Use caution not to have the wrong direction when
installing parts, if they need the installation of a
correct direction.
(There is fear of causing a fire.)
5. Some parts need to be installed at a specified
intervals or by a specified method for safety
purposes (they may be a bit floated from the board
for dissipating heat.). They must be reinstalled to
the original conditions.
(There is fear of causing a fire or your getting an
electrical shock accident.)
2. Make sure the radiating plate or heating parts are
cool enough not to get a burn before touching
such a part.
(You could get a burn.)
4. Use caution to avoid shorts due to an improperly
cut length of parts’ lead legs after soldering and
exercise care not to cut your finger with the edge
of cut surface.
(There is fear of causing a fire or your getting an
injury.
6. Use caution to solder in a correct manner so that
areas other than the part you want to solder are
contaminated with solder, like a solder ball or
bridge.
·Cautions to be taken when disassembling or reassembling the unit
WARNING
1. Prior to servicing, make sure to remove the power
supply plug.
(You could get an electrical shock accident.)
3. Before servicing, make sure you know the
locations of high-voltage parts.
(You could get an electrical shock accident.)
CAUTION
1. When disassembling or reassembling the unit,
make sure to put the front cabinet side (LCD uni t
side) downward and carry out work using caution
not to get your fingers caught.
(Since the LCD unit side is heavier, there is fear of
your getting an injury due to tipping or falling.)
3. When disassembling the unit, use caution not to
get a burn because radiating plates and areas
around lamps on the PWB are hot immediately
after unplugging.
(You could get a burn.)
5. Pay attention to burrs or edges of the resin
(cabinet and PWBs) and metal (chassis and
others) parts.
(You could cut your finger with them.)
2. Use caution not to touch the inside of the product
with a wet hand or foot.
(You could get an electrical shock accident.)
4. Do not work on an unstable place or with t he stand
put upright. In particular, fix the cabinet before
replacing PWBs or fan.
(There is fear of your getting an injury due to
tipping or falling.
2. Use caution to avoid a reaction due to your
applying too much force when removing or
reinstalling screws.
(You could get an injury.)
4. Use caution not to get you fingers caught in the
stand pole, between the stand and angles or
under the cabinet.
(You could get an injury.)
6. Use caution to the deformation of the grounding
spring or the displacement of the ferrite core.
(There is fear of causing radio noises to other
equipment.)
·Cautions to be taken when replacing fluorescent lamp
CAUTION
1. Make sure the fluorescent lamp is cool enough not
to get a burn before you are going to touch the
lamp or areas around it.
(You could get a burn.)
3. Use caution not to break the fluorescent lamp
when handling it.
(You could get an injury.)
2. Use caution to avoid a reaction due to your
applying too much force when removing the
connector.
(You could get an injury.)
CHAPTER 1. OUTLINE OF THE PRODUCT, NOMENCLATURE AND
FUNCTIONS
[1] Features
· 38 cm [15 type] 1024-dots x RGB x 768-line Anti-Glare and Low-
Refrection TFT color LCD panel
· 200 cd/m
2
high-luminance design
· Connectable to analog RGB output (for CRT)
Multi display mode function that supports resolutions from 640-dot
x RGB x 400-line to up to 1024-dot x RGB x 768-line
In modes lower than 800 x 600 dots, it is possible to enlarge the
screen that offers smooth and excellent visibility.
Supports VESA specification, Power Macintosh etc.
· Up to 16,190,000 colors are displayable
· Automatic screen adjustment
· The display timing and RGB gain can be more finely adjusted due
to the OSD guide function, in addition to the automatic adjustment
function.
<When servicing or inspecting,
observe the safety instructions.>
1. Observe the cautions.
Locations which require a special caution carry safety instructions
using labels and stamps on the cabinet, chassis and components.
When servicing, observe the instructions on such labels and
stamps as well as those in the Instruction manual.
2. Exercise care not to get an electrical shock
accident.
Some parts have a high voltage inside the unit. Use caution when
handling them while they are energized.
3. Use specified parts.
The component parts of this unit have safety characteristics such
as flame resistance and dielectric strength. Use replacement parts
which have the same characteristics as those of the components
parts used for this unit. In particular, component parts marked
with ! in the circuit drawing parts list are important for maintaining
the safety of the product. Make sure to use specified replacement
parts.
4. Reinstall component parts in their original
locations and return wires which have been
rerouted for servicing purposes to their original
positions.
Some component parts use insulating materials such as tubes or
tape for safety purposes, or are mounted, a bit floated, on the
printed wiring board.
When rerouting inside wiring or clamping the wires, use caution
not to bring the wires too close to heating or high-voltage parts.
Make sure to return inside wiring to their original locations.
5. Check for safety after servicing.
After finishing servicing, check whether the screws, parts, wires
which have been removed for servicing are reinstalled properly. In
addition, check to see if you have not det eriorated parts around
the part you serviced, and also check for insulation between each
of the attachment plug terminals and the external metal section.
[3] Specifications
1. General specifications
Name of the product: LCD color monitor
ItemSpecifications
LCD display device38 cm [15 type] super V & low reflective
black TFT liquid crystal
Picture element pitch 0.297 mm (horizontal) x 0.297 mm (vertical)
Display area304.1 mm (horizontal) x 228.1 mm (vertical)
Number of picture
elements
Display color16,190,000 colors (max.)
Input vide signalAnalog RGB (0.7 Vp-p/75W)
Input synchronizing
signal
Input terminal15-pin mini D-sub connector
Plug&PlayVESA DDC1/DDC2B
Power management
function
Working temperature 5 ~ 35°C
Power supplyD C+12 V, 100 AC 50/60Hz (when the
Power consumption22 W (when USB hub is used) /max. 30 W
Outer dimensionsabout 362 mm (width) x 185 mm (depth) x
Weightapprox. 5.2 kg
AccessoriesAC power supply cord (1), Instruction
· Specifications and a part of the appearance are subject to change
without notice.
1024 x RGB x 768 dots
Horizontal synchronizing signal TTL level
Compatible with VESA DPMS
adapter is used)
(when USB hub is used)
343 mm (height)
manual (1), warranty (1), adjustment disk
(1), USB cable (1)
2. Technical specifications
ItemMINTYPMAXUnit
Power supply voltageAC90100110V
Working temperature range+5—+35°C
Storing temperature range-20—+60°C
Humidity range20—85%RH
Visual angle rangeVertical (CR
*2 Energy Star: We are a partner company of the International
Energy Star Program. We judges that this product conforms to the guidelines of the International
Energy Star program.
The International Energy Star program is a guideline introduced
by the Environmental Protection Agency that promotes energy
savings of office equipment including computers. It aims at promoting the development and use of products with a function that
suppresses energy consumption efficiently. Companies can participate voluntarily in this program at their own discretion. The
products that are allowed to participate in this program are office
equipment including computers, displays, printers, facsimile and
copiers, and the same criteria and marking (logo) are used among
partner countries.
[DDC*3(Plug & Play)]
This unit supports VESA’s DDC specifications
3
This monitor supports VESA DDC*
The DDC is a signal standard for ensuring plug&play function
between the monitor and personal computer and sends and receives information on resolution and others between the monitor
and personal computer. Plug&Play function can be used only
when the computer supports DDC and is configured to detect a
plug&play monitor.
Some DDC types are available according to different communication protocols.
This monitor supports DDC1 and DDC2B.
3
*
Display Data Channel
standard.
[4] Nomenclature and functions
[Front part]
MENU
This button is used to pop
up, select and close the
OSD menus.
SELECT
This button is used to
select the OSD options.
These buttons are used to:
1) Adjust the value of the
selected OSD option;
2) Adjust the brightness of the
backlight while the OSD
menus is not displayed.
Panel Power Button
This turns the panel power ON
or OFF.
Power LED
This indicator illuminates
when the power is turned
on.
[Side part]
Main Power Switch
This turns the monitorÕs
main power ON or OFF.
Connector Cover
USB Downstream Ports
These ports are for
connecting the USB devices.
[Rear part]
Stand Cover
USB Upstream Port
This port is for connecting a
USB downstream connector
on your PC or a USB hub.
Back Cover
Power Connector
This is for connecting the
power cable.
Signal Cable
This is for connecting the
monitor to the VGA
connector of the video
source (PC).
Lock Anchor
This is an anchor hole for Kensington type security lock.
CHAPTER 2. REPLACING LAMPS (Removing LCD module)
[1] Replacing lamps
· After removing the LCD module from the unit according to 2. Re-
moving the LCD module, replace the lamp units.
· Replace the lamp units using the following replacement procedure,
referring to Fig.1 (enlarged view) and Fig. 2 (overall view).
· There are two lamp units at the top and bottom of the LCD
module.
· Wear finger sacks when doing this work, not to contaminate or
damage the LCD panel. Use caution prevent the entrance of
dirt or dust into the module.
[Replacement proce d u re]
Turn the module over and remove the screws A in Figs. 1. (1
screw for each unit). Put a finger on the concave B and remove
the lamp unit in a straight line.
· Use caution not to apply undue force on the lamp.
Replace the lamp unit with a new one.
Reinstall in the reverse order of disassembly.
· Tighten the screw and make sure the lamp unit won’t move.
Drawing
direction
B
Screw A
Fluorescent
lamp lead wire
[2] Removing LCD module
Procedure
Disassembly
1. Remove the 2 screws in
cabinet).
· A connector is removed so that stress may not be applied to
the control circuit board cable when a front cabinet is removed.
· Use caution not to break the latches in when removing the
front cabinet.
and remove the display mask (front
2. Remove the 8 screws in
and remove the module.
· Use caution not to drop the LCD module.
3. Remove the 2 screws in
from the module.
Reassembly
Reassemble the LCD module using the steps from 1 to 3 in reverse.
and remove the LCD cable connector
· Use caution not to get the cables caught in the cabinet when
When the monitor is set up for the first time or when the system
setting is changed, make automatic screen adjustment. "CLOCK",
"PHASE" and "V-POs" are automatically adjusted to optimal values.
When making automatic screen adjustment, make sure that the entire
screen is bright.
Carry out automatic screen adjustment as follows:
Press the MENU button once. The [MENU1 ] appears on screen.
Select MANUAL on the [ADJUSTMENT] screen.
Press the button to select AUTO.
The screen becomes dark and
A few seconds later, the screen becomes bright again and the
MENU 1 appears on screen.
Menu 1
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Upstream port
USB
This monitor comes equipped with a hub that supports USB standard.
The USB hub needs the following conditions:
· The computer to which the USB hub is connected and its OS are
compatible with USB standard.
· Or, the USB hub to which this USB hub is connected is also
connected to a USB-compatible computer (and OS).
When connecting any USB device to this monitor, use the USB cable
supplied with the monitor and observe the following conditions:
Connect the down-stream of a USB-compatible computer (or other
USB hub) with the up-stream of this monitor using the USB cable.
Connect the USB-compatible peripheral device to the USB down-
stream of the monitor.
[CAUTION]
Some USB peripheral devices might function properly depending
upon the type of computer, OS or peripheral equipment. For whether
the device you want to connect is USB compatible or not, consult the
manufacturer of the device.
The USB device connected to the USB connector of the monitor
operates when the main power supply is ON, even if the monitor is in
the power save mode or if the power switch on the front part of the
monitor is OFF.
USB-related specifications
USB standardRev. 1.0 complicd self-powered hub
Down-stream supply power 500 mA for each port (MAX.)
USB portUp-stream x 1 (rear part), down-
stream x 2 (side part)
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appears
Menu screen appears again.
The automatic screen adjustment has been thus completed.
Usually, you can use the monitor properly after carrying out automatic
screen adjustment . However, if you feel it necessary to fine-tune the
screen, use the adjustment diskette supplied with the monitor and
adjust the screen manually.
For the procedure for adjusting the screen manually, refer to the Fine
adjustment of the screen.
[CAUTION]
· If the entire screen is extremely dark, you might not be able to
perform automatic screen adjustment in some modes. In such a
case, the message
OUT OF ADJUST appears on screen, and
the settings remain unchanged.
Use the adjustment diskette supplied with the monitor or switch
the screen so that the entire screen looks bright and perform
automatic screen adjustment again.
· If the video signal from the computer is the composite sync or
sync-on-green, the screen might be adjusted properly after carrying out automatic screen adjustment. In such a case, fine adjust
the screen manually.
3-2. MANUAL SCREEN ADJUSTMENT
If fine adjustment of the screen is necessary, use the adjustment
diskette (for Windows) supplied with the monitor t o adjust the screen
manually. If you want to fine adjust computers whose OS is other
than Windows, follow the instructions on the screen.
1. OUTLINE OF ADJUSTMENT
Every time the MENU button is pressed, the screen is switched
over as follows:
Menu 1 (ADJUSTMENT)
Menu 2 (GAIN CONTROL)
Menu 3 (WHITE BALANCE)
Menu 4 (MODE SELECT)
Menu is deleted.
It changes.
On all the MENU screens, the resolution of the input signal, vertical
synchronizing frequency (V), horizontal synchronizing frequency
(H) appear at the lower part of the screen in rough values.
The values of "R-CON, G-CONT. B-CON" on the MENU 3 screen
are indicated only when "WHITE BALANCE" is in the USER.
On the MENU 4 screen, you can select menu options, but the
display status might not change, depending upon the resolution of
the input signal.
Menu 1
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Select the menu option you want to adjust, using the SELECT
button. Every time the button is pressed, the highlight moves
downward.
Adjust or switch over using or button.
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[CAUTION]
If the button operation is suspended for about 15 seconds during adjustment, the menu on screen will disappears.
Screen adjustment needs to be performed whenever the screen
mode (resolution, refresh rate and others) has been changed. The
adjustment results are automatically stored in memory and effect ive
after the power is turned off. Therefore, once the screen is adjusted
properly, there is no need to adjust the screen every time you use the
monitor.
2. HOW TO USE ADJUSTMENT PROGRAM
The following explanation is written on the assumption that the OS
is Windows 95/98.
In addition, the floppy disk drive is assumed to be drive A.
START
Insert the "Adjustment diskette" supplied with the monitor into
drive A.
Open "3.5" FD (A:)" in the "My computer".
(In the case of Windows 3.1, open the "File manager" and
select drive A.
Double click "Adj_Uty.exe" to start the adjustment program.
ADJUSTMENT
The adjustment pattern as shown on the right sketch appears
on screen and adjust, following the instructions on the screen.
END
When the adjustment is completed, press ESC key on the
keyboard to exit the adjustment program.
Color pattern
Display frame
White and black
lines alternate.
[CAUTION]
If your computers display mode is 65000 colors, the gradation of each
color of the color pattern might look different or gray scales look
tinted. It is not a problem, but due to the specification of the input
signal.
3. ADJUSTMENT ITEMS
[MENU 1] ADJUSTMENT
Adjust "CLOCK", 2PHASE", "H-POs" and V-POs".
ACCD
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MANUAL: Adjust manually. (Select the adjustment item you want
to adjust using the SELECT button.)
AUTO:The automatic screen adjustment function works t o ad-
just "CLOCK", "PHASE", "H-POs" and "V-POs" automatically to optimal values.
During the adjustment, the screen becomes dark and
indicates ADJUSTING.
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CLOCK
Adjust the pattern that white and black lines alternate so that there
is a noise (vertical stripe), using
Horizontal stripes-like noise
or button.
PHASE
Adjust the pattern that white and black lines alternate so that the
horizontal stripe noise is reduced to minimum and that the white
and black pattern looks clear, using the
Horizontal stripes-like noise
or button.
H-POS
You can move the screen to the right by pressing the
to the left by pressing the
button. Adjust the horizontal position
button and
of the screen so that both the right and left frame lines of the
pattern appear on screen.
V-POS
You can move the screen upward by pressing the
downward by pressing the
button. Adjust the vertical position of
button and
the screen so that both the top and bottom frame lines of the
pattern appear on screen.
Make sure to adjust "CLOCK" properly before proceeding with the
adjustment of "PHASE".
MANUAL: Adjust manually. (Select adjustment options using the
SELECT button.)
AUTO:The auto gain control function works to adjust the bright-
ness and contrast automatically to optimal values.
The auto gain control function adjust the brightness and contrast
based on the brightest color being displayed on the screen. If you
use this function without displaying the adjustment pattern on
screen, at least a 5 mm x 5 m m white area needs to be displayed
on screen. If not, you might not be able to make the adjustment. I n
such a case, the message
OUT OF ADJUST appears on screen
and the settings remain unchanged.
Color pattern
To execute the auto gain control function, set to the "COOL, STD,
WARM" mode on the "MENU 3. WHITE BALANCE" screen. If the
monitor is in the USER mode, the auto gain control won’t work.
BRIGHT (brightness)
Adjust the brightness of the entire screen.
The screen becomes brighter by pressing
pressing the
button.
button and darker by
You can also adjust the brightness of the light source (backlight) of the LCD monitor. For more information, see "Adjusting
backlight brightness."
CONT (contrast)
Adjust the contrast on the color pattern screen on the adjustment
program so that all gradations can be displayed. The contrast
becomes stronger by pressing the
ing the
button.
button and weaker by press-
COLOR (number of displayable colors)
Set the maximum displayable colors (1,6190,000 colors or
260,000 colors)
[MENU 3] WHITE BALANCE
Adjust the color of the screen.
The monitor is factory adjusted properly about the color of the screen,
and thus there is not necessary to adjust it . If adjustment of the whi te
balance is required for any reason, select the adjustment options
using the SELECT button and adjust it.
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[MENU 2] GAIN CONTROL
Adjust the brightness and contrast of the screen.
The monitor is factory adjusted properly. However, it might need to
be adjusted depending upon the type of computer to which the monitor is connected. Adjust the brightness and contrast, observing the
color pattern of the adjustment program.
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COOL - STD - WARM
You can select the color you want from among the 5 preset
modes.
COOL : Bluish than the standard setting.
■
:A little bluish than the standard setting.
STD :Standard setting
■
:A little reddish than the standard setting
WARM : Reddish than the standard setting
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