Read Sharp LL-T181A (serv.man2) Service Manual online
CHAPTER 1. OUTLINE OF THE PRODUCT, NOMENCLATURE AND FUNCTIONS
[1] Features
·
46 cm [18.1 type] 1280-dots x RGB x 1024-line high-resolution
TFT color LCD panel
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 1280-dot x RGB x 1024-line
In modes lower than 1024 x 768 dots, it is possible to enlarge the
screen that offers smooth and excellent visibility.
VESA standard, PC9800 series, Power Macintosh compatible
x RGB x 400-line to up to 1280-dot x RGB x 1024-line
In modes lower than 1024 x 768 dots, it is possible to enlarge the
screen that offers smooth and excellent visibility.
VESA standard, PC9800 series, Power Macintosh compatible
·
Up to 16,770 thousand colors can be displayed.
·
Automatic screen adjustment, OSD lock, automatic gain control
functions
functions
·
The display timing and RGB gain can be more finely adjusted due
to the OSD guide function, in addition to the automatic adjustment
function.
to the OSD guide function, in addition to the automatic adjustment
function.
·
Power management function
·
Supports Plug&Play (VESA:DDC1, DDC2B standards)
·
Supports composite sync., sync-on-green in addition to H,V sepa-
rate sync.
rate sync.
·
Swivel mechanism
[2] Safe servicing and safe inspection,
<When servicing or inspecting,
observe the safety instructions.>
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.
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.
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
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.
parts.
4. Reinstall component parts in their original
locations and return wires which have been
rerouted for servicing purposes to their original
positions.
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.
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 deteriorated parts around
the part you serviced, and also check for insulation between each
of the attachment plug terminals and the external metal section.
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.
[3] Specifications
1. General specifications
[Name of the product]
: LCD color monitor
[Model]
: LL-T181A
[LCD panel]
·
Display method
: Transmission type TN LCD panel
·
Driving method
: TFT (Thin Film Transistor) active-matrix type
·
Screen size
: 460.0 mm (18.1 type) diagonal
·
Viewable area
: 287.2 (vertical) x 359 (horizontal) mm
·
Pixel configuration
: 1280 x 1024 pixels (1 pixel = R + G + B dots)
·
Pixel pitch
: 0.805 (H) x 0.805 (V) mm
·
Pixel array
: R,G,B vertical stripe
[Light source]
: Inside light (CCFT method), Service life: approx. 50,000 H (at normal temperature of 25°C.)
[Power consumption]
: approx. AC 54 W. AC4.5W in power management mode (when the AC adapter is used)
[Adjustment controls and switches]
: (Front side)
Power supply switch ..........................POWER
Input selector key switch....................INPUT
OSD adjustment key switch ............... SELECT MENU
[LED]
: (Front side)
Green
: Normal operation after power supply is turned on.
Orange
: In power save mode
[Input terminal]
: (Rear side)
Video input connector ........................15-pin mini D-sub connector x2 ports
Power supply input connector............DC jack
[Video input signal]
: Analog RGB (0.7 Vp-p/75
W
)
[Synchronizing input signal]
: Vertical sync. signal
TTL level (positive, negative)
: Horizontal sync. signal
TTL level (positive, negative)
Separate sync., composite sync., sync.-on-green compatible
[Outer dimensions]
: 470 mm (W) x 218 mm (D) x 455 mm (H) (including the stand)
[Weight]
: approx. 11.5 kg Monitor with stand
[Accessories]
: AC adapter (100~240 V AC 50/60 Hz DC+12 V)
Mini D-sub signal cable (1.8 m)
Instruction manual, warranty, adjustment disk
[Safety standard]
: AC adapter: Conforms to Electrical Appliance Control Law (type approval No. 91-56895)
[Undesired radiation]
: Meets CISPR Pub, 22 Class B
2. Technical specifications
Item
MIN
TYP
MAX
Unit
Power supply voltage
AC
100
~
240
V
DC
11.4
12.0
13.2
V
Working temperature range
+5
—
+35
°C
Storing temperature range
-20
—
+60
°C
Humidity range
20
—
85
%RH
Visual angle range
Vertical (CR 5)
m
50
m
70
—
Temperature
Horizontal (CR 5)
m
60
m
70
—
Temperature
Contrast ratio(CR)
(
q
= 0°)
230
300
—
—
Response speed
Leading (
t
r)
—
10
25
ms
Trailing (
t
d)
—
35
50
ms
Screen white chromaticity
(X)
0.274
0.304
0.334
—
(Y)
0.284
0.314
0.344
—
White surface luminance
(Y
L
)
150
200
—
cd/m
2
Module model number
LQ181E1DG10
Specifications and a part of the appearance are subject to change without notice.
[Power management]
This unit supports VESA*
1
DPMS*
2
.
To use the power management function of this unit, the video card
and the computer must be compatible with the DPMS specifications.
and the computer must be compatible with the DPMS specifications.
*1 VESA: Video Electronics Standards Association
*2 DPMS: Display Power Management Signaling
DPMS mode
Screen condition
Power consumption
Horizontal synchronization
Vertical synchronization
ONSTATE
Displayed state
approx. 54 W
Yes
Yes
STANDBY
No display
Less than 4.5 W
No
Yes
SUSPEND
Yes
No
OFFSTATE
No
No
[DDC*
3
]
This unit supports VESA’s DDC specifications
DDC means a signal specification that offers Plug&Play function to
the monitor and the personal computer.
the monitor and the personal computer.
Information about resolution and others are communicated between
the monitor and the personal computer.
the monitor and the personal computer.
This function is available when the personal computer supports DDC.
There are some DDC types depending on different communication
methods.
methods.
This unit supports DDC1 and .DDC2B.
*3 DDC: Display Data Channel
[4] Nomenclature and functions
Front side
Rear side
INPUT
MENU
SELECT
POWER
MENU Button
P
ressing the MENU button
opens, switches or closes
the MENU screens.
the MENU screens.
SELECT Button
Pressing the SELECT
button selects a menu item
to be adjusted.
button selects a menu item
to be adjusted.
Power Indicator
When the monitor is turned
on, the power indicator
lights green.
When the monitor is in the
power save mode, the
power indicator lights
orange.
on, the power indicator
lights green.
When the monitor is in the
power save mode, the
power indicator lights
orange.
POWER Button
Pressing the POWER button
turns on power supply to the
monitor.
(It may take some time for the
display to appear on the
monitor after you press the
POWER button.)
Pressing the POWER button
again turns off power supply
to the monitor.
turns on power supply to the
monitor.
(It may take some time for the
display to appear on the
monitor after you press the
POWER button.)
Pressing the POWER button
again turns off power supply
to the monitor.
Monitor Stand Front Cover
You can store the AC adapter
inside this cover.
inside this cover.
Operation Buttons
INPUT Button
Each time you press the
INPUT button, the input to this
monitor is switched between
signal 1 and 2.
INPUT button, the input to this
monitor is switched between
signal 1 and 2.
and Buttons
AC Adapter Jack (Inside the
Power Jack Cover)
Power Jack Cover)
Be sure to use the supplied AC
adapter.
adapter.
Analog RGB Input # 2 (Inside the
Signal 2 Terminal Cover)
Signal 2 Terminal Cover)
Connect the analog RGB signal
cable of a second computer with
this terminal.
cable of a second computer with
this terminal.
Signal 2 Terminal Cover
Covers the analog RGB input # 2.
Remove this cover and connect
the signal cable of a second
computer with this monitor.
computer with this monitor.
Hole for Mounting Antitheft Lock
An antitheft cable can be
connected with this monitor.
connected with this monitor.
Power Jack Cover
Remove this cover to
connect the AC adapter.
connect the AC adapter.
Monitor Stand Rear Cover
Remove this cover to feed
and connect cables.
and connect cables.
Analog RGB Signal Cable
(Input # 1)
(Input # 1)
Connect the monitor to the
VGA connector of a video
source (PC).
VGA connector of a video
source (PC).
