Sharp LLT15A3 Schematic
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SERVICE MANUAL
MODEL
CONTENTS
CHAPTER 1. OUTLINE OF THE PRODUCT,
NOMENCLATURE AND FUNCTION. . . . . . . . . . . . . . . . . .1 - 1
CODE : 00Z
LLT15A3SME
LCD MONITOR
LL-T15A3
CHAPTER 2. CONNECTION, ADJUSTMENT,
OPERATION, AND FUNCTIONS. . . . . . . . . . . . . . . . . . . . .2 - 1
CHAPTER 3. DISASSEMBLY AND ASSEMBLY. . . . . . . . . . . . . . . . . . . .3 - 1
CHAPTER 4. TROUBLESHOOTING. . . . . . . . . . . . . . . . . . . . . . . . . . . . .4 - 1
CHAPTER 5. BLOCK DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5 - 1
CHAPTER 6. CIRCUIT DIAGRAM. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6 - 1
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 servic e only.
The contents are subject to change without notice.
CHAPTER 1. OUTLINE OF THE PRODUCT, NOMENCLATURE AND FUNCTION
1. SPECIFICATIONS
■
■ PRODUCT SPECIFICATIONS
■ ■
• Model name
LL-T15A3-H (Frosty gray) / LL-T15A3-B (Black)
• LCD display
38 cm measured diagonally
TFT LCD module
• Resolution (max.)
XGA 1024 x 768 pixels
• Displayable colors (max.)
Approx.16.19 million colors (6bit + FRC)
• Brightness (max.)
260cd/m
• Dot pitch
0.297 (H) x 0.297 (V) mm
• Contrast ratio
350:1
• Angle of visibility
Left-right 160°; Up-down 150° (contrast ratio u 5)
• Screen display size
Horizontal 304.1 mm x Vertical 228.1 mm
• Video signal
Analog RGB (0.7Vp-p) [75Ω]
• Sync signal
Separate Sync (TTL level: +/-)
• Expansion compensation
Digital screening (Enlargement VGA/SVGA etc. to full screen size.)
• Plug & Play
VESA DDC1/DDC2B compatible
• Power management
VESA: based on DPMS
• Input signal terminal
Mini D-sub 15 pin (3 row)
• Screen tilt
Upward approx.0 - 25°; downward approx.0 - 3°
• Power supply
AC100 - 240V, 50/60Hz
(Use special AC adapter, type NL-A53J of Sharp Corporation.)
• Temperature of operating environment
5 - 35°C
• Power consumption
Maximum 30W (Standby state: 3W) (Use special AC adapter.)
• Dimensions
343 (W) x 170 (D) x 308 (H) mm
• Weight
Approx. 3.4kg (approx. 2.5kg excluding stand)
(Excluding AC adapter.)
2
■
■ DIMENSIONS (UNITS: MM)
■ ■
343
267
308
200
130
44
Analog signal cable: Approx. 1.8m
Special AC adapter:
Approx. 1.8m
Approx. H 120mm x D 60mm x H 37mm
■
■ SIGNAL TIMINGS
■ ■
Display mode Hsync Vsync Dot frequency
VESA 640 x 480 31.5kHz 60Hz 25.175MHz
37.9kHz 72Hz 31.5MHz
37.5kHz 75Hz 31.5MHz
800 x 600 35.1kHz 56Hz 36.0MHz
37.9kHz 60Hz 40.0MHz
48.1kHz 72Hz 50.0MHz
46.9kHz 75Hz 49.5MHz
1024 x 768 48.4kHz 60Hz 65.0MHz
56.5kHz 70Hz 75.0MHz
60.0kHz 75Hz 78.75MHz
US text 720 x 400 31.5kHz 70Hz 28.3MHz
Power
Macintosh
series
• Recommended resolution is 1024 x 768.
• All are compliant only with non-interlaced.
• Frequencies for Power Macintosh are referenc e values. To connect,
another adapter (commercially available) 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.
640 x 480 35.0kHz 66.7Hz 30.2MHz
832 x 624 49.7kHz 74.6Hz 57.3MHz
1024 x 768 60.2kHz 75Hz 80.0MHz
170
LL-T15A3 OUTLINE OF THE PRODUCT, NOMENCLATURE AND FUNCTION
1 – 1
■
■ THE ANALOG RGB INPUT CONNECTOR PIN
■ ■
(Mini D-sub connector with 15 pins)
2. PRODUCT DESCRIPTION
12345
6789
11 12 13 14 15
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 N.C. 12 DDC data
5 N.C. 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
■
■ POWER MANAGEMENT
■ ■
The monitor is based on VESA DPMS (Display Power Management Signaling).
To activate the monitor's Power Management function, both the video
card and the comp uter must conform to the VESA DPMS standard.
DPMS mode Screen
ON Display on 30W Yes Yes
STANDBY
SUSPEND Yes No
OFF No No
■
■ DDC (PLUG & PLAY)
■ ■
This monitor supports the VESA DDC (Display Data Channel) standard.
DDC is a signal standard for carry ing 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 monitor.
There are many va rieties of DDC due to the d ifferences between sys tems. This monitor works with DDC1 and DDC2B.
Display off 3W
10
Power
consumption
H-sync V-sync
No Y es
10
9
1 2 3 4 5 6 7 8
1. MENU button: This button is used to pop-up, select and close
the OSD (On Screen Display) Menu.
2. c button: This button is used to select menu options
when the OSD Menu is displayed.
3. 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.
4. AUTO button: When the OSD Menu is displayed:
This button is used to turn off the OSD Menu.
When the OSD Menu is not displayed.
This button is used to perform automatic
adjustment of the screen (CLOCK, PHASE,
H-POS and V-POS).
5. Power LED: This LED is lit green when in use and orange
when in power-saving mode.
6. Power button: Pressing this button turns the power on. ( After
turning the power on, it may take a little time
before the screen displays.)
Press the button again to turn the power off.
7. Power terminal: The AC adapter is connected here.
8. Analog signal cable: Connects to the computer’s analog RGB out-
put terminal.
9. Security lock anchor: By connecting a security lock (commercially
available) to the security lock anchor, the monitor is fixed so that it cannot be transported.
The security slot works in conjunction with
Kensington Micro Saver Security Systems.
10. Ventilation open ings:
Note: Never block the ventilation openings as
this may lead to overheating inside the monitor
and result in malfunction.
LL-T15A3 OUTLINE OF THE PRODUCT, NOMENCLATURE AND FUNCTION
1 – 2
■
■ STANDING UP AND ADJUSTING THE MONITOR
■ ■
Caution:
• Pressure from hands on the LCD panel could cause damage.
• Be careful not to place any objects on the cables. Doing so may
result in disconnection.
1) Standing up the monitor
1. Press down on the stand and lift up the top section of the monitor.
2) Folding up the monitor (when packing it away)
• Except when folding away the monitor to transport it, do not fold down
the monitor.
Unnecessarily folding and unfolding the monitor could lead to malfunction.
1. Remove the AC adapter.
2. If carrying out adjustments to the monitor, place it upright.
3. While pressing the rear lock disable button 1, gently fold back the
monitor 2.
3) Angle adjustment
Lighty holding both sides of the monitor, adjust it to a suitable viewing
angle.
approx.25
approx.3
• Do not use the monitor when tilted back beyond approxim ately 25°.
The monitor may fall over leading to injury or malfunction.
approx.3
approx.25
Prohibited range
2
1
LL-T15A3 OUTLINE OF THE PRODUCT, NOMENCLATURE AND FUNCTION
1 – 3
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 computer are
switched off.
• Be careful not to overly bend the cable or add extension cords as
this could lead to a malfunction.
1-1. CONNECTING THE MONITOR TO A COMPUTER
Analog RGB output terminal
(Mini D-sub 15 pin, 3 row)
Analog signal cable
• Paying attention to connector direction, firmly inse rt 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.
Macintosh conversion adapter
2. Attach the power cord to the AC adapter and place the power plug
into the AC outlet.
AC outlet
Power cord
1-3. TURNING THE POWER ON
1. Press the monitor's POWER button.
2. Turn on the computer.
The power LED will be lit green, and the screen will display an
image.
Power LED Power button
Note:
• If us ing the monitor for the first time or after having changed the
system settings during use, perform an automatic screen adjustment.
• Depending on the computer or OS, it may be necessary to use the
computer to install monitor set-up information. If so, follow the
steps below to install the monitor set-up information.
1-2. CONNECTING THE MONITOR TO A POWER
SOURCE
1. Connect the AC adapter to the monitor's power terminal.
Power terminal
AC adapter
LL-T15A3 CONNECTION, ADJUSTMENT, OPERATION, AND FUNCTIONS
1-4. TURNING THE POWER OFF
1. Turn the computer off.
2. Press the monitor's POWER button.
The Power LED will disappear.
If the monitor is not going to be used for a long period of time, be
sure to unplug it from the AC outlet.
2 – 1
1-5. INSTRUCTIONS FOR ATTACHING A VESA COMPLIANT ARM
An arm or stand based on the VESA standard (comme rcially available)
can be attached to the monitor.
Procurement of the arm or stand is at the customer's discretion.
When choosing the arm to be installed please take note of the following
points.
• The arm should be compatible with the VESA standard, and there
must be a gap of 75mm x 75mm between the screw holes on the
section to be attached.
• The arm m ust not fall off or break off after being attached to the
monitor.
Note: Do not overly bend the cable or add extension cords as this
could lead to malfunction.
1. Turn off the power switch and remove the AC adapter from the
monitor's power terminal.
2. Being careful not to damage the monitor, spread out a soft cloth and
lay the monitor on it display-side down.
4. Attach the arm to the monitor with four screws.
Note: The screws used to attach the arm should be M4 screws with a
length of 4 mm ~ 6 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
injuly.
4 ~ 6mm
Screw used to attach arm
Arm
Part of monitor to which
arm is attached
3. Remove the four screws and then remove the stand from the monitor.
Note:
• 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 malfunction.
5. Connect the AC adapter to the monitor's power terminal.
LL-T15A3 CONNECTION, ADJUSTMENT, OPERATION, AND FUNCTIONS
2 – 2
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