Sharp LL-T15A4 Service Manual ▷ View online
CODE : 00Z
q
SERVICE 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
LLT15A4SME
LCD MONITOR
LL-T15A4-H
MODEL
LL-T15A4-B
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. BLOCK DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4 - 1
CHAPTER 5. TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5 - 1
CHAPTER 6. CIRCUIT DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6 - 1
CHAPTER 7. PWB LAYOUT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7 - 1
Model Name
Product Name
Color
For USA
For Other
LL-T15A4H
LL-T15A4U
LL-T15A4E
Gray
LL-T15A4B
LL-T15A4Y
LL-T15A4P
Black
LL-T15A4
OUTLINE OF THE PRODUCT, NOMENCLATURE AND FUNCTION
1 – 1
CHAPTER 1. OUTLINE OF THE PRODUCT, NOMENCLATURE AND FUNCTION
1. SPECIFICATIONS
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PRODUCT SPECIFICATIONS
• Model name
LL-T15A4-H (Frosty gray)/LL-T15A4-B (Black)
• LCD display
38 cm measured diagonally
TFT LCD module
TFT LCD module
• Resolution (max.)
XGA 1024 x 768 pixels
• Displayable colors (max.)
Approx.16.19 million colors (6bit + FRC)
• Brightness (max.)
260cd/m
2
• Dot pitch
0.297 (H) x 0.297 (V) mm
• Contrast ratio
350:1
• Angle of visibility
Left-right 160°; Up-down 135° (contrast ratio
u
5)
• Screen display size
Horizontal 304.1 mm x Vertical 228.1 mm
• Video signal
Analog RGB (0.7Vp-p) [75
Ω
]
• Sync signal
Separate Sync (TTL level: +/-), Sync on Green,
Composite Sync (TTL level: +/-)
Composite Sync (TTL level: +/-)
• Expansion compensation
Digital scaling (Enlarges VGA/SVGA etc. to full screen size.)
• Plug & Play
VESA DDC1/DDC2B compatible
• Power management
VESA: based on DPMS
• Speaker output
1W + 1W
• Input signal terminal
Mini D-sub 15 pin (3 row)
• Audio input terminal
Mini stereo jack
• Headphone terminal
Mini stereo jack
• Screen tilt
Upward approx.0 - 25°; downward approx.0 - 5°
• Power supply
AC100 - 240V, 50/60Hz
• Temperature of operating environment
5 - 35°C
• Power consumption
23W (With no audio input)
(26W maximum, 2W when in power-saving mode)
(26W maximum, 2W when in power-saving mode)
• Dimensions
338 (W) x 145 (D) x 313 (H) mm
• Weight
Approx. 3.6kg (approx. 3.0kg excluding stand)
(Excluding analog signal cable.)
(Excluding analog signal cable.)
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DIMENSIONS (UNITS: MM)
Analog signal cable: approx. 1.8m
Audio cable: approx. 1.8m
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SIGNAL TIMINGS
• Recommended resolution is 1024 x 768.
• All are compliant only with non-interlaced.
• Frequencies for Power Macintosh are reference values.
• 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.
is compatible with the monitor.
• If the monitor is not receiving any signal (synch signal), [NO SIGNAL]
will appear.
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
Macintosh
series
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
338
313
275
63
203
145
LL-T15A4
OUTLINE OF THE PRODUCT, NOMENCLATURE AND FUNCTION
1 – 2
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THE ANALOG RGB INPUT CONNECTOR PIN
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POWER MANAGEMENT
The monitor is based on VESA DPMS (Display Power Management Sig-
naling).
To activate the monitor's power management function, both the video
card and the computer must conform to the VESA DPMS standard.
card and the computer must conform to the VESA DPMS standard.
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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
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 varieties of DDC due to the differences between sys-
tems. This monitor works with DDC1 and DDC2B.
tems. This monitor works with DDC1 and DDC2B.
2. PRODUCT DESCRIPTION
No.
Function
No.
Function
1
Red video signal input
9
+5V
2
Green video signal input
10
GND
3
Blue video signal input
11
N.C.
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
DPMS mode
Screen
Power
consumption
H-sync
V-sync
ON
Display on
26W
Yes
Yes
STANDBY
Display off
2W
No
Yes
SUSPEND
Yes
No
OFF
No
No
1
2
3
4
5
11
12
13
14
15
6
7
8
9
10
(Mini D-sub connector with 15 pins)
1. MENU button:
This button is used to pop-up, select and close
the OSD (On Screen Display) Menu.
the OSD (On Screen Display) Menu.
2.
c
/MODE button:
When the OSD Menu is displayed:
This button is used to select menu options.
When the OSD Menu is not displayed:
This button is used to set DISPLAY MODE.
3.
e d
buttons:
When the OSD Menu is displayed:
These buttons are used to select an option or
adjust the value of the selected option.
adjust the value of the selected option.
When the OSD Menu is not displayed:
These buttons are used to adjust backlight
brightness and speaker volume.
4. Power button:
Pressing this button turns the power on. (After
turning the power on, it may take a little time
before an image appears on the screen.)
Press the button again to turn the power off.
Press the button again to turn the power off.
5. Power LED:
This LED is lit green when in use and orange
when in power-saving mode.
6. Speakers:
Audio entering via the external device con-
nected to the monitor can be heard.
7. Power terminal:
8. Analog RGB input terminal:
The analog signal cable is connected here.
The analog signal cable included should be
used.
used.
9. Audio input terminal:
A computer’s audio output terminal can be
connected here. The audio cable included
should be used.
should be used.
10. Security lock anchor: By connecting a security lock (commercially
available) to the security lock anchor, the mon-
itor is fixed so that it cannot be transported.
itor is fixed so that it cannot be transported.
The security slot works in conjunction with
Kensington Micro Saver Security Systems.
11. Headphone terminal: Headphones (commercially available) can be
connected here.
12. Ventilation openings: Note: Never block the ventilation openings as
this may lead to overheating inside the monitor
and result in malfunction.
1
2
3
4
5
6
6
7
8 9
11
10
12
LL-T15A4
OUTLINE OF THE PRODUCT, NOMENCLATURE AND FUNCTION
1 – 3
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STANDING UP AND ADJUSTING THE MONITOR
Caution:
• Pressure from hands on the LCD panel could cause damage.
• Be careful not to allow your fingers to be pinched.
1) Standing up the monitor
1.
Press down on the stand and lift up the top section of the monitor.
• When raising the display section, movement becomes harder in
the middle of travel.
Continue raising by applying more force at that point.
• Raise the display section until it stops. (when titled forward
approx. 5°)
2.
Adjust to an easy to view angle.
2) Angle adjustment
Press down on the stand and adjust it to a suitable viewing angle.
• Do not use the monitor when tilted back beyond approximately 25°.
The monitor may fall over leading to injury or malfunction.
3) Folding up the monitor
1. Remove the cables.
2. Press down on the stand and gently fold back the monitor.
approx. 5
approx. 5
approx. 25
Prohibited range
approx. 5
approx. 25
