Sharp LL-T1815H User manual

qSERVICE MANUAL
CONTENTS
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.
SHARP CORPORATION This document has been published to be used
for after sales service only.
The contents are subject to change without notice.
CODE : 00ZLLT1815SME
LCD MONITOR
LL-T1815H
MODEL LL-T1815B
CHAPTER 1. OUTLINE OF THE PRODUCT, NOMENCLATURE AND FUNCTION . . . 1 – 1
CHAPTER 2.
CONNECTION, ADJUSTMENT, OPERATION, AND FUNCTIONS . . . . 2 – 1
CHAPTER 3. DISASSEMBLY AND ASSEMBLY. . . . . . . . . . . . . . . . . . . 3 – 1
CHAPTER 4. TROUBLE SHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 – 1
CHAPTER 5. WAVE FORM. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 – 1
CHAPTER 6. BLOCK DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 – 1
CHAPTER 7. CIRCUIT DIAGRAM. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 – 1
CHAPTER 8. PARTS LAYOUT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 – 1
Model Name Product Name
For North America For others
LL-T1815H LL-T1815U LL-T1815E
LL-T1815B LL-T1815Y LL-T1815P

LL-T1820-H/B SERVICE PRECAUTION
■
■■
■SERVICE PRECAUTION
[OVERCURRENT PROTECTION ELEMENT FOR USB OUTPUT OF THE POWER UNIT]
The USB output (5V, connector CN2) of the power unit is provided with an overcurrent protection element (Part Number PTC101) of PTC (positive
characteristics thermister). Its resistance becomes high when heated by an overcurrent, and shuts down the circuit similarly with a fuse. When it is
cooled down by non-conduction, its resistance returns to a low level and allows a current to flow through the circuit.
If a user erroneously allows an overcurrent to flow through an USB device, the PTC101 cuts off the current. When repaired, it returns to normal. Note
this operation of the PTC 101 in case of an USB error.

PC-UM10M
LL-T1815 OUTLINE OF THE PRODUCT, NOMENCLATURE AND FUNCTION
1 – 1
CHAPTER 1. OUTLINE OF THE PRODUCT, NOMENCLATURE AND FUNCTION
1. SPECIFICATIONS
■ PRODUCT SPECIFICATIONS
• LCD display
18.1 inches (46 cm measured diagonally)
Advanced-Super-V and Anti Glare Low Reflection TFT LCD module
• Resolution (max.)
SXGA 1280 u1024 pixels
• Displayable colors (max.)
16.77 million colors (8 bit)
• Brightness (max.)
250cd/m2
• Dot pitch
0.2805(H) 0.2805(V) mm
• Contrast ratio
350 : 1
• Angle of visibility
Left-right 160° ; Up-down 160°
• Screen display size
Horizontal 359 mm uVertical 287.2 mm
• Video signal
Analog: Analog RGB (0.7Vp-p) [75Ω]
Digital: DVI standard based on 1.0
• Sync signal
Separate Sync (TTL level: +/-), Sync on Green,
Composite Sync (TTL level: +/-)
• Expansion compensation
Digital screening
Enlarging VGA/SVGA/XGA etc. with a compensation process.
(no enlarging, based on a fixed aspect ratio, and enlarging to full
screen size.)
• Plug & Play
VESA: DDC2B compatible
• Power management
VESA: based on DPMS
DVI: based on DMPM
• Input signal terminal
Analog: 15 pin mini D-sub(3 rows)
Digital / Analog: 29 pin DVI-I u2
• Speaker output
1W + 1W
• Audio input terminal
Mini stereo jack
• Headphone terminal
Mini stereo jack
• Height adjustment
Adjustment range: Approx.80 mm
• Screen rotation
Clockwise 0° - 90°
• Screen tilt
Upward approx. 0° - 30° ; downward approx. 0° - 5°
• Screen swivel
Approx. 90° from left through right
• Power supply
AC100-240V, 50/60Hz (Use special AC adapter, type NL-A03E of
Sharp Corporation.)
• Temperature of operating environment
5 - 35°C
• Power consumption
51W(With no audio input)
(55W maximum, 5W when in power-saving mode)
• Dimensions (W uD uH)
With long width screen: 395 mm u213 mm u427(- 507) mm
With long height screen: 324 mm u213 mm u463(- 543) mm
• Weight (excluding AC adapter)
Approx. 8.7 kg, Display area only, approx. 5.5kg
■ DIMENSIONS (Units: mm)
Special AC adapter
Cable(Accesory)
Analog signal cable: Approx. 2.0 m
Audio cable: Approx. 2.0 m
Cable(Option)
Digital signal cable,
NL-C01E(purchased separately):Approx. 2.0 m
Analogue signal cable,
NL-C02E(purchased separately):Approx. 2.0 m
2-input cable,
NL-C03J(purchased separately):Approx. 025 m
Approx. 2.0 m
Approx.W 120 mm uD 60 mm uH 35 mm

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LL-T1820-H/B OUTLINE OF THE PRODUCT, NOMENCLATURE AND FUNCTION
1 –2
Relevant signal timings (analog)
•Recommended resolution is 1280 u1024.
•All are compliant only with non-interlaced.
•Frequencies for Power Macintosh and the Sun Ultra series are refer-
ence values. To connect, another adapter (purchased separately)
may be required.
•If the monitor is receiving timing signals that are not compatible, [OUT
OF TIMING] will appear. Follow your computer's instruction manual
to set the timing so that it is compatible with the monitor.
•If the monitor is not receiving any signal (synch signal), [NO SIGNAL]
will appear.
Relevant signal timings (digital)
•Recommended resolution is 1280 u1024.
•All are compliant only with non-interlaced.
•A computer with an output terminal conforming to DVI (DVI-D24 pin
or DVI-I29 pin) and with SXGA output capability can be connected
here.
(Depending on the type of computer to be connected, the display may
not work correctly.)
•If the monitor is receiving timing signals that are not compatible, [OUT
OF TIMING] will appear. Follow your computer's instruction manual
to set the timing so that it is compatible with the monitor.
•If the monitor is not receiving any signal (synch signal), [NO SIGNAL]
will appear.
The analog RGB input connector pin
Display mode Hsync
(kHz) Vsync (Hz) Dot frequency (MHz)
VESA 640 u480
31.5kHz 60Hz 25.175MHz
37.9kHz 72Hz 31.5MHz
37.5kHz 75Hz 31.5MHz
37.9kHz 85Hz 36.0MHz
640 u400 37.9kHz 85Hz 31.5MHz
720 u400 37.9kHz 85Hz 35.5MHz
800 u600 35.1kHz 56Hz 36.0MHz
37.9kHz 60Hz 40.0MHz
48.1kHz 72Hz 50.0MHz
46.9kHz 75Hz 49.5MHz
53.7kHz 85Hz 56.25MHz
1024 u768 48.4kHz 60Hz 65.0MHz
56.5kHz 70Hz 75.0MHz
60.0kHz 75Hz 78.75MHz
68.7kHz 85Hz 94.5MHz
1152 u864 67.5kHz 75Hz 108.0MHz
1280 u960 60.0kHz 60Hz 108.0MHz
1280 u1024 64.0kHz 60Hz 108.0MHz
80.0kHz 75Hz 135.0MHz
US text 720 u400 31.5kHz 70Hz 28.3MHz
Power
Macintosh
series
640 u480
35.0kHz 66.7Hz 30.2MHz
832 u624 49.7kHz 74.6Hz 57.3MHz
1024 u768 60.2kHz 75Hz 80.0MHz
1152 u870 68.7kHz 75Hz 100.0MHz
1280 u1024 64.0kHz 60Hz 108.0MHz
80.0kHz 75Hz 135.0MHz
Sun Ultra
series 1024 u768
48.3kHz 60Hz 64.13MHz
53.6kHz 66Hz 70.4MHz
56.6kHz 70Hz 74.25MHz
1152 u900 61.8kHz 66Hz 94.88MHz
71.8kHz 76.2Hz 108.23MHz
1280 u1024 71.7kHz 67.2Hz 117.01MHz
81.1kHz 76Hz 134.99MHz
Display mode Hsync
(kHz) Vsync (Hz) Dot frequency (MHz)
VESA 640 u480 31.5kHz 60Hz 25.175MH
37.9kHz 72Hz 31.5MHz
37.5kHz 75Hz 31.5MHz
800 u600 37.9kHz 60Hz 40.0MHz
48.1kHz 72Hz 50.0MHz
46.9kHz 75Hz 49.5MHz
1024 u768 48.4kHz 60Hz 65.0MHz
56.5kHz 70Hz 75.0MHz
60.0kHz 75Hz 78.75MHz
1152 u864 67.5kHz 75Hz 108.0MHz
1280 u960 60.0kHz 60Hz 108.0MHz
1280 u1024 64.0kHz 60Hz 108.0MHz
US text 720 u400 31.5kHz 70Hz 28.3MHz
No. Function No. Function
1 Red video signal input 9 DDC+5V
2 Green video signal input 10 N.C.
3 Blue video signal input 11 GND
4 GND 12 DDC data
5 GND 13 For Hsync signal input
6 For red video signal GND 14 For Vsync signal input
7 For green video signal
GND
15 DDC clock
8 For blue video signal
GND
(Mini D-sub connector with 15 pins)
54321
15 14 13 12 11
10
9876

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LL-T1815 OUTLINE OF THE PRODUCT, NOMENCLATURE AND FUNCTION
1 –3
The DVI-I input connector pin
Power management
The monitor is based on the VESA DPMS*1and the DVI DMPM*2stan-
dards.
To activate the monitor's Power Management function, both the video
card and the computer must conform to the VESA DPMS standard and
the DVI DMPM standard.
*1 DPMS: Display Power Management Signalling
*2 DMPM: Digital Monitor Power Management
DDC (Plug & Play)
This monitor supports the VESA DDC (Display Data Channel) standard.
DDC is a signal standard for carrying out Plug & Play functions on the
monitor or PC. It transfers information such as degree of resolution
between the monitor and PC. You can use this function if your PC is
DDC compliant and if it is set so that it can detect the Plug & Play mon-
itor.
There are many varieties of DDC due to the differences between sys-
tems. This monitor works with DDC2B.
PRODUCT DESCRIPTION
No. Function No. Function
1 TMDS data 2- 16 Hot plug detection
2 TMDS data 2+ 17 TMDS data 0-
3 TMDS data 2/4 shield 18 TMDS data 0+
4 N.C. 19 TMDS data 0/5 shield
5 N.C. 20 N.C.
6 DDC clock 21 N.C.
7 DDC data 22 TMDS clock shield
8 Analogue vertically
synchronised signal 23 TMDS clock +
9 TMDS data 1- 24 TMDS clock -
10 TMDS data 1+ C1 Analogue red image signal
11 TMDS data 1/3 shield C2
Analogue green image signal
12 N.C. C3 Analogue blue image signal
13 N.C. C4 Analogue horizontally
synchronised signal
14 +5V C5 Analogue GND
15 GND
DPMS mode Screen Power
consumption H-sync V-sync
ON Display on 51W
(withnoaudio
input)
Yes Yes
STANDBY Display off 5W No Yes
SUSPEND Yes No
OFF No No
DPMS mode Screen Power consumption
ON Display on 51W (with no audio input)
OFF Display off 5W
1. INPUT button: To switch between the signals input termi-
nals. (Input terminal 1 0Input terminal 2)
2. MENU button: This button is used to pop-up, select and
close the OSD (On Screen Display) Menu.
3. cbutton: This button is used to select menu options
when the OSD Menu is displayed.
4. e d buttons: When the OSD Menu is displayed:
These buttons are used to increase or
decrease the value of a selected option.
When the OSD Menu is not displayed:
These buttons are used to adjust backlight
brightness and speaker volume.
5. Power button
6.PowerLED: This LED is lit green when in use and
orange when in power-saving mode.
7. Speakers: Audio entering via the monitor and the
external device connected to the monitor
can be heard.
8. Headphone terminal: Headphones (commercially available) can
be connected here.
9. Audio input terminal: A computer’s audio output terminal can be
connected here. The audio cable included
should be used.
10. DVI-I input terminal:
(INPUT-2) The computer’s digital RGB output terminal
or analog RGB output terminal can be con-
nected here.
Separately sold cables are necessary for
connection.
For a digital signal input: It can be con-
nected to a computer with a DVI-compatible
output terminal (DVI-D24 pin or DVI-I29 pin)
and which has SXGA output ability.
Depending on the computer to be con-
nected, correct display may or may not be
possible.
11. Analog RGB input
terminal(INPUT-1) The analog signal cable is connected
here.The analog signal cable included
should be used.
12. Security lock anchor: By connecting a security lock (commercially
available) to the security lock anchor, the
monitor is fixed so that it cannot be trans-
ported.
The security slot works in conjunction with
Kensington Micro Saver Security Systems.
13. Power terminal
14. Main power switch
15. Ventilation openings: Note: Never block the ventilation openings
as this may lead to overheating inside the
monitor and result in malfunction.
12 3 4 5 6
Rear side
810 13
14
12
7
9
Front side
11
15
15
7

PC-UM10M
LL-T1820-H/B OUTLINE OF THE PRODUCT, NOMENCLATURE AND FUNCTION
1 –4
HEIGHT ADJUSTMENT, ANGLE ADJUSTMENT,
ROTATION (LONG HEIGHT/WIDTH)
Caution: •Pressure from hands on the LCD panel could cause dam-
age.
•Be careful not to allow your fingers to be pinched.
Height adjustment
Adjust to an easy to view height.
Angle adjustment
Adjust to an easy to view angle.
Rotation (long height/width)
The display can be rotated for a long height or width to suit the dis-
played content.
•Before rotating, move the display to its uppermost position. If the dis-
play is rotated while it is set low, it will contact the stand and could
lead to damage.
•The display can only be rotated through a range of 90°. Applying
excessive force may cause malfunction.
•Do not apply excessive force when the cable is connected.
To set to long height
Gently turn in the clockwise direction (to 90°).
To set to long width
Gently turn in the counterclockwise direction (to 90°).
Note: The orientation of the display can be changed using Pivot Soft-
ware.
Approx. 80mm
Approx. 30
Approx. 45
Approx. 45
Approx. 5

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LL-T1815 CONNECTION, ADJUSTMENT, OPERATION, AND FUNCTIONS
2 – 1
CHAPTER 2. CONNECTION, ADJUSTMENT, OPERATION, AND FUNCTIONS
1. CONNECTING THE MONITOR AND TURNING THE MONITOR ON AND OFF
Caution: • When connecting, ensure that both the monitor and com-
puter are switched off.
• Be careful not to overly bend the cable or add extension
cords as this could lead to malfunction.
Cable storage
If necessary, excess cable can be housed in the stand.
1. Remove the cover.
Gently pull the top of the cover towards yourself.
2. Run cable along the back of the stand.
Pass cable in front of the stand, and then bring it through the back.
• If the display is to be rotated, first house the cables with the dis-
play in the long height position, so there is sufficient length when
the display is turned.
3. Refit the cover.
Be careful not to pinch the cable.
• If the cover is hard to refit, do not force it. Check whether cables
are trapped.
Caution: If the display is to be rotated, first house the cable, and then
check while gently turning the display. If it cannot be turned,
rehouse the cable with sufficient slack. (If there is insufficient
cable length, rotation will be impossible. Forcing rotation may
cause cable disconnection.)
CONNECTING THE MONITOR TO A COMPUTER
Connecting using accessory analog signal cable
Connect the accessory analog signal cable to the analog RGB input ter-
minal of the display, and the analog RGB output terminal of the com-
puter.
• Paying attention to connector direction, firmly insert the signal
cable to terminal, and then tighten the screws at both sides.
If connecting to a D-sub 15 pin 2 row Apple Power Macintosh, attach a
Macintosh conversion adapter (commercially available) to the analog
signal cable.
Analog RGB input
terminal
Analog signal cable Analog RGB output
terminal
Macintosh conversion adapter

PC-UM10M
LL-T1820-H/B CONNECTION, ADJUSTMENT, OPERATION, AND FUNCTIONS
2 –2
When connecting using separately sold digital or analog
signal cables
The separately sold display cable enables connection between the DVI-
I input terminal on the display and the digital or analog RGB output ter-
minal of the computer.
When connecting to a digital RGB output terminal:
•Use a digital signal cable (model name: NLC01E)
•For digital RGB connection, the monitor has an input for connecting
to a computer with a DVI-compatible output connector (DVI-D 24 pin
or DVI-I 29 pin) and SXGA output capability. (Depending on the type
of computer to be connected, the display may not work correctly.)
When connecting to an analog RGB output terminal:
•Use an analog signal cable (model name: NLC02E).
•Paying attention to connector direction, firmly insert the signal
cable to terminal, and then tighten the screws at both sides.
Note: When using digital or analog signal cables, set [INPUT-2] to
[1 LINE].
Set the monitor as follows when establishing a digital connection with a
Power Mac using an ADC-DVI adapter made by Belkin. (Operation has
been checked with the Power Mac G4 M7627J/A)
•Perform settings with the Power Mac power supply off.
1. After connecting the power cord, turn on the monitor’s main power.
2. Press the ebutton and dbutton simultaneously, and while doing
this press the POWER button (i.e. turn the power on).
3. Set the input terminal to which the Belkin ADC-DVI adapter is con-
nected to ON.
Use the SELECT button to select [INPUT1] or [INPUT2], and use
the e d buttons to select [ON] and [OFF].
•Do not set to [ON] if you are not using a Belkin ADC-DVI adapter,
as this may result in incorrect display.
4. Press the power button, and turn off the monitor power.
This completes setting.
When connecting using a separately sold 2-input cable
The separately sold 2-input cable (model name:NLC03J) enables 2 sys-
tem connection.
1. Connect a 2-input cable (purchased separately) to the DVI-I input
Cterminal on the display.
2. Connect the analog and digital signal cables (purchased separately)
to the 2-input cable, then connect to a computer.
•Paying attention to connector orientation, firmly insert the signal cable
into the PC, and then tighten the screws at both sides.
Notes:
•When using a 2-input cable, set [INPUT-2] to [2LINES].
•The monitor connected to the mini D-sub connector of the 2-input
cable may not be automatically recognized and setup under Plug &
Play. Perform storage of setup information manually.
Display cable
(purchased separately) RGB output terminal
DVI-I input terminal
˩˝˟ȁˠ˥ˣ˥˰˝˨
ŊŏőŖŕĮij ŐŇŇ Őŏ
DVI-I input terminal
mini D-sub 15 pin
2-input cable
(purchased
separately)
DVI-D24 pin
Analog signal cable
Digital signal cable
(NL-C01E, purchased separately)
Analog RGB output terminal
Digital RGB output terminal

PC-UM10M
LL-T1815 CONNECTION, ADJUSTMENT, OPERATION, AND FUNCTIONS
2 –3
Connect the accessory audio cable
When the accessory audio cable is connected to the audio output termi-
nal of the computer, the sound of the connected computer is output
from the display speakers. You can also use the headphone jack of the
display.
CONNECTION OF HEADPHONES
(COMMERCIALLY AVAILABLE)
Headphones (commercially available) can be connected.
Notes:
•When the headphones are connected, no sound can be heard from
the monitor speakers.
CONNECTING THE MONITOR TO A POWER SOURCE
TURNING THE POWER ON
1. Turn on the main power of the monitor.
•When switching the main power switch on and off, always wait
for an interval of at least 5 seconds. Rapid switching may result
in malfunction.
2. Press the monitor’s POWER button.
The power LED will light up orange.
3. Turn on the computer.
When a signal is input from the computer, the power LED lights up
green, and the screen is displayed (After power is turned on, it may
take a little time until the screen is displayed.)
•If the input terminal to which the computer is connected has not
been selected, the screen will not be displayed. If necessary,
perform input terminal switching. (right column)
Notes: (when using an analog signal)
•If using the monitor for the first time or after having changed the sys-
tem settings during use, perform an automatic screen adjustment.
•When connecting to a notebook, if the notebook computer’s screen is
set so that it is displaying at the same time, the MS-DOS screen may
not be able to display properly. In this case, change the settings so
that only the monitor is displaying.
Audio input terminal
Audio cable To audio output
terminal
Headphone terminal
Headphones
Power terminal
AC outlet
Power cord
Main power switch
ON
Press power button Turn on the computer
power supply.

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LL-T1820-H/B CONNECTION, ADJUSTMENT, OPERATION, AND FUNCTIONS
2 –4
CHANGING BETWEEN INPUT TERMINALS
Use the INPUT button to switch between signal input terminals.
The input signal type (ANALOG/DIGITAL) is displayed within angle
brackets < >.
When using a 2-input cable
Note:
•When there is no input signal, [NO SIGNAL] is displayed.
TURNING THE POWER OFF
1. Turn the computer off.
2. Press the monitor’s POWER button.
The Power LED will disappear.
If the monitor will not be used for a long time, turn off the main power
switch of the monitor, and remove the power plug from the outlet.
2. INSTRUCTIONS FOR ATTACHING A VESA COM-
PLIANT ARM
An arm or stand based on the VESA standard (commercially available)
can be attached to the monitor.
Procurement of the arm or stand is at the customer’s discretion.
Arms or stands able to be used
Attachments must satisfy the following.
•Compatible with the VESA standard
•Have a gap of 100 mm x 100 mm between the screw holes on the
section to be attached
•Not be likely to fall off or break off after being attached to the monitor.
How to attach the arm or stand
•Be careful not to overly bend the cable or add extension cords as this
could lead to malfunction.
•While following these instructions, please also refer to the installation
instructions in the operation manual included with the arm or stand.
1. Remove the cable.
2. Spread out a soft cloth on a suitable horizontal surface.
3. Being careful not to damage the monitor, gently lay the monitor on it
display-side down.
Caution: Securely grasp both the display and stand, and gently tip over.
When the monitor is inclined, the stand may suddenly pop out
and cause injury.
4. Remove the four screws and then remove the stand from the moni-
tor.
Notes: •The stand is specially made for use with this monitor. Once
having removed the stand, never attempt to attach it to
another device.
•Once having removed the screws, store them together with
the stand and if the stand is ever re-attached be sure to use
the original screws. Using different screws could lead to a
malfunction.
Caution: Do not disassemble the stand. Parts may spring out and cause
injury.
INPUT-1
< > INPUT-2
< >
INPUT
Select [INPUT-1] Select [INPUT-2]
INPUT 2-A
<ANALOG> INPUT 2-D <DIGITAL>
INPUT-1
Select [INPUT-1]
Select [INPUT-2]
(analog) Select [INPUT-2] (degital)
INPUT
INPUTINPUT
Turn the computer off
OFF
Press power button

PC-UM10M
LL-T1815 CONNECTION, ADJUSTMENT, OPERATION, AND FUNCTIONS
2 –5
5. Attach the arm to the monitor with the four screws.
Note: The screws used to attach the arm should be M4 screws with a
length of 6 mm ~ 8 mm protruding from the surface to be
attached. Using different screws could lead to malfunction or may
lead to the monitor falling off,internal damaged,personal injury.
INFORMATION ABOUT THE PIVOT SOFTWARE
(LONG HEIGHT/WIDTH DISPLAY)
When rotating the display, change the display orientation using Pivot
Software.
Compatible operating systems (OS) for the Pivot Software (trial version)
that comes with the monitor:
Windows 98/2000/Me/XP
Macintosh OS 8.x - 9.1
•Depending on the graphics accelerator, it may be impossible to use
Pivot Software, even with a compatible OS.
For production information and inquiries regarding Pivot Software:
Portrait Displays, Inc.
(http://www.portrait.com)
Installation of Pivot Software (trial version)
For Windows
1. Quit all applications being used.
2. Load the accessory CD-ROM into the CD-ROM drive of the com-
puter.
3. Open the [My computer] CD-ROM.
4. Double click on the [Pivot] folder.
5. Double click on [SETUP.exe].
6. Click [Next].
7. Choose [I accept the tems in the License Agreement].
8. Click [Next].
9. Input your Customer information [User Name] and [Organization].
10.Click [Next].
11.Click on [Install].
Installation will begin.
12.When the message indicating installation is finished is displayed,
click [Next].
13.Click on [Finish].
14.Click on [Yes] and restart the computer.
For Macintosh
1. Quit all applications being used.
2. Load the accessory CD-ROM into the CD-ROM drive of the com-
puter.
3. Open the CD-ROM.
4. Double click on the [Pivot] folder.
5. Select the desired language.
6. Double click on [Install MacPortrait].
7. Drag the [MacPortrait Install] icon onto the desired disk.
Installation will begin.
8. When the message indicating installation is finished is displayed,
click on [Restart].
Switching display direction
For Windows
1. Click the right mouse button or click the left mouse button on at
the lower right of the screen.
2. Select [Rotate], [Rotate to 0] or [Rotate to 90].
Rotate : The display direction switches.
Rotate to 0: The display direction is switched to long width.
Rotate to 90:The display direction is switched to long height.
For Macintosh
Choose [ROTATE Now] from at the lower right of the screen.
Each time [ROTATE Now] is selected, the display direction switches.
Notes:
•Rotation of the display to match the display direction is done manu-
ally.
•The display direction on the OSD menu is switched using [OSD
PIVOT] on the [MODE SELECT-2] menu.
6 - 8mm
Screw used to attach arm
Arm
Part of monitor to which arm is attached

PC-UM10M
LL-T1820-H/B CONNECTION, ADJUSTMENT, OPERATION, AND FUNCTIONS
2 –6
2. ADJUSTMENT
2-1. ADJUSTMENT METHOD
MENU
MENU
MENU
MENU ADJUSTMENT AUTO
CLOCK
PHASE
H-POS
V-POS
GAMMA
MENU GAIN
CONTROL AUTO
BLACK LEVEL
CONTRAST
MENU
COLOR
CONTROL
COLOR MODE (sRGB, STD, VIVID)
COOL STD
WHITE BALANCE WHITE BALANCE
WARM USER
R-CONTRAST
G-CONTRAST
B-CONTRAST
MENU MODE SELECT-2 OSD
OSD V-POSITION
EXPAND
OSD PIVOT
SCALING
LANGUAGE
MENU
MENU
MENU
MENU
MENU
MENU
MENU MODE SELECT-1
ၭ
INFORMATION
OFF TIMER
INPUT-2
400 LINES
OSD H-POSITION
ȁValid even when there is no input signal.
ȁWhen the above procedure is executed, key lock/release is changed over.
ȁWhen key lock is set, the black display is shown and "ADJUSTMENT LOCKED" is displayed for about 3 sec.
ȁWhen key release is set, the black display is shown and "ADJUSTMENT UNLOCKED" is displayed for about 3 sec.
ȁWhen key lock is set, all the keys except for the power key are disabled.
1) All reset of the adjustment values
2) Reset of the ADJUSTMENT menu
4) Backlight brightness adjustment
5) Speaker sound volume adjustment
6) Display adjustment
3) Adjustment lock and lock release
While pressing + , turn on the power.
simultaneously.Press +
While pressing , turn on the power.
Adjust with and .(Select BRIGHT.)
Adjust with and . (Select VOLUME.)
(Analog only)
(Analog only)
(Analog only)
(Adjust with .)and
(Adjust with .)
and
(Adjust with .)
and
(Adjust with .)
and
(Adjust with .)
and
(Adjust with .)
and
(Adjust with .)
and
(Adjust with .)
and
(Adjust with .)
and
(Adjust with .)
and
(Adjust with .)
and
(Adjust with .)
and
(Adjust with .)
and
(Adjust with .)
and
(Adjust with .)
and
(Adjust with .)
and
(Adjust with .)
and
(Adjust with .)
and
(Adjust with .)
and
(Adjust with .)
and
(When ON, Adjust with .)and
(Display)
(Select with .)

PC-UM10M
LL-T1815 CONNECTION, ADJUSTMENT, OPERATION, AND FUNCTIONS
2 – 7
7) Version display
While pressing + , turn on the power.
nValid even when there is no input signal.
nThe version , the date, and check sum are displayed.
nWhen is pressed, the version display disappears.
nAll the keys except for and the power key are disabled.
nThe version display keeps ON until or the power key is
pressed.
8) Set/reset of usage time
While pressing + + , turn on the
power.
nValid even when there is no input signal.
nWhile the top display of usage time setup is display, +
to enter the setup menu of usage time.
nWhen is pressed with the cursor on MANUAL, the cursor is
shifted to RESET, the message of "RESET USAGE TIME" is displayed on
the black background and the usage time is reset to zero. Then the setup
menu of usage time is displayed again. (The cursor is on MANUAL.)
nPress , and the cursor (the selected item) is shifted down.
nWhen the cursor is on X10000, X1000, X100, X10, or X1, the value on
each digit of usage time can be changed with + .
nWhen is pressed in the top display or in the setup menu of
usage time, the display disappears.
[Range of adjustment values]
*The maximum set value is 65535.
9) Diagnostic (Self test)
While pressing + , turn on the power.
nWhen the diagnostic is executed, no menu is shown.
nWhen the diagnostic is executed, the display shows Red →Green →Blue
→Yellow →Purple →Light Blue →White →Black repeatedly.
nWhen the diagnostic is executed, all the keys except for the power key are
disabled.
nTurn off the power to terminate the diagnostic.
10) Information display
While pressing + , turn on the power.
nValid even when there is no input signal.
nThe model name, the serial No., and the usage time are displayed.
nWhen is pressed, the display disappears.
11) MAC DIGITAL setup
While pressing + , turn on the power.
nValid even when there is no input signal.
nWhen is pressed, the MAC DIGITAL mode is turned off, and
the machine performs normal DVH operations.
nWhen is pressed, the MAC DIGITAL mode is turned on, and
the machine performs with digital fixed. To display digital signals with MAC,
it is set to ON. When set to ON, the machine performs with digital fixed
even when another than MAC is used.
nis pressed, the MAC DIGITAL setup menu disappears.
nThe initial setup is OFF.
12) GAMMA setup
While pressing + + , turn on the
power.
nWhen is pressed, the machine enters the 8bit mode.
MENU
VERSION XX
2002. 05. 31
CHECKSUM XXXX
MENU
MENU
MENU
INPUT
SET/RESET USAGE TIME
ȼ
USAGE TIME
ȿ10000
ȿ1000
ȿ100
ȿ10
ȿ1
0
0
1
2
3
MANUAL RESET
Press
MENU
Range of adjustment Initial value
×10000 0 -6 0
×1000 0 - 9 0
×100 0 - 9 0
× 10 0 - 9 0
×10-9
0
INFORMATION
MODEL : LL-T1815-H
SERIAL No. : 2A001234
USAGE TIME : 00123 H
OK <MENU>
MENU
MAC DIGITAL
INPUT-2 OFF ON
MENU
MENU
GAMMA 10BIT OFF ON

PC-UM10M
LL-T1820-H/B CONNECTION, ADJUSTMENT, OPERATION, AND FUNCTIONS
2 –8
2-2. ADJUSTMENT ITEM LIST
BUTTON ITEM ADJUSTMENT DESCRIPTION
MENU MENU 1:
ADJUSTMENT MANUAL CLOCK 0~255 CLOCK: The figure below demonstrates how to adjust so that verti- cal flicker noise is not emitted. (e d buttons)
MENU 1
4
MENU 2
4
MENU 3
4
MENU 4
4
MENU 5
4
MENU END
PHASE 0~31 PHASE: The figure below demonstrates how to adjust so that hori-
zontal flicker noise is not emitted. (e d buttons)
H-POS 0~ H-POS (horizontal positioning) and
V-POS (vertical positioning)
To center the screen image within the boundaries of the screen,
adjust the left-right (H-POS) values and the up-down (V-POS) val-
ues. (e d buttons)
V-POS 0~
AUTO Automatic screen adjustment
Options in the ADJUSTMENT Menu can be adjusted automatically
(CLOCK, PHASE, H-POS V-POS).
MENU 2:
GAIN CONTROL MANUAL BLACK LEVEL 0~100 BLACK LEVEL: Total screen brightness can be adjusted while watching the color pattern. (e d buttons)
CON-
TRAST 0~100 CONTRAST:While watching the color pattern, adjustments can be made so that all graduations appear. (e d buttons)
AUTO GAIN CONTROL Menu
AUTO: Every menu option is automatically adjusted using the
Auto Gain Control function.
MENU 3:
COLOR CONTROL COLOR MODE sRGB, STD, VIVID STD: Displays image with the color tone results from original
scheme of liquid crystal panel.
sRGB: sRGB is international standard of color representation speci-
fied by IEC (International Electrotechnical Commission).
Color conversion is made in taking account of liquid crystals
characteristics and represents color tone close to it original
image.
VIVID: Displays an image with dynamic and VIVID primary colors.
WHITE BALANCE COOL •STD •WARM
(5 levels),
USER R •G •B:
0~100
WHITE BALANCE Menu
COOL : Color tone bluer than standard
•: Color tone slightly bluer than standard
STD : Color tone standard setting
•: Color tone slightly redder than standard
WARM : Color tone redder than standard
USER
R-CONTRAST : ebutton for blue-green
dbutton for red
G-CONTRAST : ebutton for purple
dbutton for green
B-CONTRAST : ebutton for yellow
dbutton for blue
GAMMA -10~10 Adjust so that dark and bright images are easy to see. If the screenis
dark and hard to see, increase the numerical value. If it is bright and
hard to see, lower the numerical value. (e d buttons)
MENU 4:
MODE SELECT-1 IINFORMATION A model name (MODEL), a serial no. (S/N), and usage time
(USAGE TIME) of the display can be checked.
OFF TIMER ON(1 - 23 hours) •OFF Power is automatically shut off when the set time elapses.
INPUT-2 1LINE •2LINES Set [1 LINE] when connecting digital or analog signal cables to a
DVI-I input terminal (INPUT-2) on the display.
Set [2LINES] when connecting a 2-input cable.
MENU 5:
MODE SELECT-2 OSD H-POSITION OSD H-POSITION (OSD horizontal position) The position of the OSD display can be moved to the left and right.
(e d buttons)
OSD V-POSITION OSD V-POSITION (OSD vertical position)
The position of the OSD display can be moved up and down.
(e d buttons)
OSD PIVOT OFF(landscape)
•ON(portrait ) The orientation of the OSD display can be changed.
LANGUAGE 7 countrys
DEUTSCH, ENGLISH,
ESPANOL, FRANCAIS,
ITALIANO, NETHER-
LAND, SVENSKA
LANGUAGE
Messages displayed on the screen and OSD Menu contents can
be changed to the following languages.
Dutch, English, French, German, Spanish, Italian, Swedish.
EXPAND OFF •CN1 •CN2 For display modes of less than 1280 X 1024 pixels, the display can
be expanded if desired.
SCALING 0~4 SCALING (Level of scaling)
The sharpness of the image can be adjusted. (e dbuttons)
400 LINES 640 •720 400 LINES (degree of resolution)
You can specify the horizontal resolution of a 400-line screen
when using US text, etc.(e d buttons)
640: 640 u400 dot mode
720: 720 u400 dot mode (US text etc.)
cSelect the item
e d 0~31 Adjusting the backlight
POWER ON, OFF

PC-UM10M
LL-T1815 DISASSEMBLY AND ASSEMBLY
3 – 1
CHAPTER 3. DISASSEMBLY AND ASSEMBLY
15
2
C
1
D
3
E
4
5
6
7
8
A
AA
B
B
B
B
B
C
C
C
C
C
F
J
GH
I
I
I
I
IK
K
KL
L
L
9
12
10
11
13
14
N
N
N
O
P
R
O
OQ
1. Separating the display from the stand
1) Remove the four screws Aand remove the display 1from the stand 2.
2. Display
1) Remove the seven screws Band remove the rear cabinet 3.
2) Remove the seven screws Cand remove the PWB shield 4.
3) Remove the harnesses D, F. Remove the three screws Eand remove the
*** PWB 5.
4) Remove the harnesses G, H. Remove the 18 screws and remove the main
PWB 6.
5) Remove the harness J. Remove the five screws Kand remove the power
supply PWB 7.
6) Remove the eight screws Land remove the angle 8from the LCD unit 9.
7) Remove the front cabinet F.
8) Remove the seven harnesses N. Remove the three screws Oand remove
the inverter PWB G.
9) Remove the six screws P, H, Q. Remove the angles H, I, Jfrom the
LCD unit K.

PC-UM10M
LL-T1820-H/B DISASSEMBLY AND ASSEMBLY
3 – 2
C
D
1
2
A
A
6
9
13
14
15
11
12
B
B
D
E
F
G
I
H
H
H
I
I
7
3
4
5
8
10
3. Stand
1) Remove the five screws Aand separate the *** 1from the base 2.
2) Remove the cover 3.
3) Remove the six screws Band remove the *** 4.
4) Remove one screw Cand remove the cover 5.
5) Remove the two screws Dand remove the *** 6.
6) Remove the two screws Eand remove the *** 7.
7) Pull the *** 9out of the *** 8.
8) Remove the two screws Fand remove the *** F.
9) Remove one screw Gand remove the *** G.
10) Remove the three screws Hand remove the *** H.
11) Remove the 17 screws and remove the *** I, *** Jand *** K.

PC-UM10M
LL-T1815 TROUBLE SHOOTING
4 – 1
CHAPTER 4. TROUBLE SHOOTING
First of all, check that all the following accessory cables are properly connected.
Also check that the video mode setup of your PC is set to the signal timing conforming to this machine.
Accessory cables
• Exclusive-use AC adapter
• Exclusive-use analog signal cables (RGB cable, DVI-A cable)
• Exclusive-use digital signal cable (DVI-D cable)
THE DISPLAY DOES NOT WORK. (ANALOG RGB)
When the power button is pressed, does the LED
light up? 3 (No) Execute 1.
4 (Yes)
When the RGB cable is disconnected, does the
LED turn from Green to Orange? 3 (No) Execute 1.
4 (Yes)
When the RGB cable is connected again, does the
LED keep Green?
(Without changing from Green to Orange)
3 (No) Execute 2.
4 (Yes)
Does the B/L light up? (∗Light leaks from clear-
ance of lead wires on the sheet metal side. ) 3 (No) Execute 3.
4 (Yes)
Does the display work properly in each video
mode? 3 (No) Execute 4.
4 (Yes)
There is no abnormality.
1
4
Is 5V (Main PWB LD69) outputted? 3 (No) Check IC28 and its peripheral circuits.
4 (Yes)
Is 5V (Main PWB LD69) outputted? 3 (No) Execute 2.
4 (Yes)
Do Q8 (1 pin) and R196 supply an output? (4.5V) 3 (No) Execute 2.
4 (Yes)
Does FB9 • CN5 (2 pin) supply on output? (2.0V) 3 (No) Check Q8 and its peripheral circuits.
4 (Yes)
Do Q7 (1 pin) and R185 supply an output? (4.5V) 3 (No) Execute 2.
4 (Yes)
Does FB9 • CN5 (2 pin) supply on output? (2.0V) 3 (No) Check Q7 and its peripheral circuits.
4 (Yes)
Check connection of the SW cable and the SW
PWB.

PC-UM10M
LL-T1820-H/B TROUBLE SHOOTING
4 – 2
2
4
Is the input signal port connected to the analog sig-
nal cable? 3 (No) IPress the INPUT key to switch to the proper input signal port.
4 (Yes)
Is DC+12V outputted from CN7 3PIN - 9PIN? 3 (No) Check the power unit.
4 (Yes)
Is LD60 at DC+5V? 3 (No) Check the DC+5V power line and IC25 peripheral
circuits.
4 (Yes)
Is LD64 at DC+3.3V? 3 (No) Check the DC+3.3V power line and IC26 peripheral
circuits.
4 (Yes)
Is LD65 at DC+2.5V? 3 (No) Check the DC+2.5V power line and IC27 peripheral
circuits.
4 (Yes)
Is the voltage across fuse F1 at DC+12.0V? 3 (No) Check the POWER_CTL signal and IC24 peripheral
circuits.
4 (Yes)
Is the R156 side of C144 at HIGH level (DC+5V)? 3 (No) Check the RESET circuit in the peripheral of IC17.
4 (Yes)
Is the FB15 level varied by ON/OFF of SW in the
front? 3 (No) Check the MAINPW_IN signal and wiring of the main
SW from CN5 - SW PWB.
4 (Yes)
Is the Q6 output (connected to R157) changed to
HIGH level after turning on the main SW and then
to LOW level (DC+0V)?
3 (No) Check Q6 peripheral circuits.
4 (Yes)
Is 21PIN of IC16 oscillating? 3 (No) Check IC 16 and the clock circuit in the peripheral of
X2.
4 (Yes)
Is the pin on the C113 side of X1 oscillating? 3 (No) Check IC18 and the clock circuit in the peripheral of
X1.
4 (Yes)
Are the signal waveforms of LD11 and LD12 (LD5,
LD6) normal? 3 (No) Check the analog signal cable and CN1 (CN2).
4 (Yes)
Is the signal waveform of LD14 (LD15) normal? 3 (No) Check IC2 peripheral circuits.
4 (Yes)
Are the signal waveforms of LD18 and LD19 nor-
mal? 3 (No) Check IC3 and IC4 peripheral circuits.
4 (Yes)
Are the signal waveforms of LD22 and LD23 nor-
mal? 3 (No) Execute 5. Check the microcomputer circuit. /
GM5060
4 (Yes)
Are the signal waveforms of LD20 and LD21 nor-
mal? 3 (No) Remove R96/R97 and check if the signal waveform
on the IC8 side is normal or not. 3 (No) Replace IC8
(Yes)
4 (Yes)
Check the DCLK • DEN line.
Is the signal waveform of RN31 - RN35 normal? 3 (No) Is the positive (+) side (not installed) of C161 at
DC+3.3V? 3 (No) Check FB17 and IC28 periph- eral circuits.
(Yes)
4 (Yes)
Is R246 at HIGH level (DC+3.3V)? 3 (No) Check IC14 peripheral circuits.
4 (Yes)
Remove the LCD module, and check if the signal
waveform of RN31 - RN35 normal or not. 3 (No) Check IC23 peripheral circuits.
4 (Yes)

PC-UM10M
LL-T1815 TROUBLE SHOOTING
4 – 3
(Yes) 4 (Yes)
Replace the LCD module.
Is the positive (+) side of C162 at DC+12V? 3 (No) Check IC24 peripheral circuits.
4 (Yes)
Is 7PIN of ICN6 at DC0V? 3 (No) Check R221.
4 (Yes)
Replace the LCD module
3
4
Is the main PWB LD54 at DC+12V? 3 (No) Check F3 in the power unit, the power line, and the
FB18 line.
4 (Yes)
Is LD58 at DC+5V? 3 (No) Check IC14, FB21, D18, and CN8 peripheral cir-
cuits.
4 (Yes)
Is LD56 at DC+2.5V or less? 3 (No) Check the main PWB and the DC jack PWB in the
peripheral of IC14.
4 (Yes)
Is 1PIN of CN2 - CN7 of the inverter PWB unit at
about 600Vrms? (Use extreme care to prevent
against an electrical shock. Use a high voltage
probe of 100:1 or more for measuring the voltage.)
3 (No) Replace the inverter PWB unit.
4 (Yes)
Check the lamp in the LCD module.
4
4
Are LD60 and LD61 at DC+5V? 3 (No) Check the DC+5V power line and IC25 peripheral
circuits.
4 (Yes)
Is LD64 at DC+3.3V? 3 (No) Check the DC+3.3V power line and IC26 peripheral
circuits.
4 (Yes)
Is LD65 at DC+2.5V? 3 (No) Check the DC+2.5V power line and IC27 peripheral
circuits.
4 (Yes)
Does the whole display remain black? 3 (Yes) Is the voltage across fuse F1 at DC+12.0V? 3 (No) Check F1, IC14 and IC24
peripheral circuits.
(No)
4 (Yes)
Is the oscillating circuit of X1 and X2 normal
(10MHz)? 3 (No) Check the oscillation circuit of X1 and X2 in the peripheral of
IC16.
4 (Yes)
Are the signal output of LD20 and LD21 normal? 3 (No) Execute 2.
4 (Yes)
Check IC23 peripheral circuits, or CN6 and the LCD
module.
Is the display size abnormal?
3 (Yes) Are the adjustment items of ADJUSTMENT and MODE SELECT are properly set? 3 (No) Set the items properly according to the LCD display adjustment
procedures.
(No)
4 (Yes)
Check X1, X2, IC15, the peripheral circuits, and the
software.

PC-UM10M
LL-T1820-H/B TROUBLE SHOOTING
4 – 4
4 (No)
Does the color flicker when displaying whole
black from the signal source? 3 (Yes) Check IC10, IC11, and IC12 peripheral circuits.
4 (No) 4 (Yes)
Does the display deflect or flicker?
3 (Yes) Are the adjustment items of ADJUSTMENT and MODE SELECT are properly set? 3 (No) Set the items properly according to the LCD display adjustment
procedures.
(No)
4 (Yes)
ICheck IC2, IC3, and IC4 peripheral circuits.
Is there any abnormality in the colors of the LCD
display? 3 (Yes) Are the adjustment items of GAIN CONTROL and WHITE BALANCE properly set? 3 (No) Set the items properly according to the LCD display adjustment
procedures.
4 (Yes)
Are the analog color signal outputs normal? (Pins on
the IC8 side of C7, C11, C15) 3 (No) Check IC1 peripheral circuits.
4 (Yes)
(No) Is the abnormal section shifted by varying BRIGHT •
CONTRAST with the gradation pattern? 3 (Yes) Display the RGB color gradation of RN1 - RN12 output data
lines, and check the line where
there is any abnormality.
4 (No)
Check IC10, IC11, and IC12 peripheral circuits.
Are the adjustment contents saved after comple-
tion of adjustment of the display? 3 (No) Check IC13 and IC16 peripheral circuits.
4 (Yes)
Can the inputs be switched normally? 3 (No) Check IC1, IC2, IC3, and IC4 peripheral circuits.
4 (Yes)
No abnormality
5
4
Is the R156 side of C144 at HIGH level (DC+5V)? 3 (No) Check the RESET circuit in the peripheral of IC17
and IC14.
4 (Yes)
Is the Q6 output (connected to R157) changed to
HIGH level after turning on the main SW and then
to LOW level (DC+0V)?
3 (No) Check Q6 peripheral circuits.
4 (Yes)
Are signal waveforms provided at 12PIN - 19PIN
of IC18? 3 (No) Check IC18 and IC19 peripheral circuits.
4 (Yes)
Are signal waveforms provided at RN30, R166,
and R168? 3 (No) Check RN30, R166, and R168 (the control line of
IC16 and IC8).
4 (Yes)
Check IC8.