Sharp LL-T1810A (serv.man10) Service Manual ▷ View online
Notes:
•
After completing the adjustment, press the computer’s [Esc]
key to exit the Adjustment Program.
key to exit the Adjustment Program.
•
If your computer’s display mode is set to 65K colors, you
may see the different color levels in each color pattern or
the gray scale may look colored. (This is due to the input
signal specification and is not a malfunction.)
may see the different color levels in each color pattern or
the gray scale may look colored. (This is due to the input
signal specification and is not a malfunction.)
■
Adjusting the screen automatically
1. Press the MENU button.
The ADJUSTMENT Menu will be displayed.
2. Press the button.
The screen will become dark and [ADJUSTING] will be displayed.
After a few seconds the ADJUSTMENT Menu will return. (The
automatic adjustment is now complete.)
After a few seconds the ADJUSTMENT Menu will return. (The
automatic adjustment is now complete.)
3. Press the MENU button 4 times to make the On Screen Display
(OSD) Menu disappear.
Notes:
•
In most cases the monitor is ready to be used after auto-
matic adjustment.
matic adjustment.
•
If necessary due to any of the following, manual adjust-
ments (p. 19) can be made after the automatic adjustment.
ments (p. 19) can be made after the automatic adjustment.
•
When further fine adjustment is needed.
•
When the computer’s video input signals are Composite
Sync or Sync On Green. (Automatic adjustments may
not be possible.)
Sync or Sync On Green. (Automatic adjustments may
not be possible.)
•
When, after command 2 above, [OUT OF ADJUST] is
displayed. (When the screen displays an entirely dark
image, the automatic screen adjustment may be dis-
abled. When making an automatic adjustment, be sure
to either use the Adjustment Pattern or try displaying an
image that makes the entire screen very bright.)
displayed. (When the screen displays an entirely dark
image, the automatic screen adjustment may be dis-
abled. When making an automatic adjustment, be sure
to either use the Adjustment Pattern or try displaying an
image that makes the entire screen very bright.)
ADJUSTING THE BACKLIGHT
The backlight brightness can be adjusted.
Carry out the commands without the On Screen Display (OSD) Menu
displayed. If the OSD Menu is displayed, press the MENU button
(several times may be required) and begin when the OSD Menu has
disappeared.
displayed. If the OSD Menu is displayed, press the MENU button
(several times may be required) and begin when the OSD Menu has
disappeared.
1. Without the OSD Menu being displayed, push the or the
button. At the bottom of the screen the BRIGHT bar will appear.
2. Adjust by pressing the button (darker) or button (lighter).
The BRIGHT bar automatically disappears approximately 3 seconds
after the last command.
after the last command.
MANUAL SCREEN ADJUSTMENT
Fine adjustments can be made using the On Screen Display (OSD)
Menu provided.
Menu provided.
MENU 1:
ADJUSTMENT
CLOCK, PHASE, H-POS (horizontal positioning) and V-
POS (vertical positioning)
CLOCK, PHASE, H-POS (horizontal positioning) and V-
POS (vertical positioning)
MENU 2:
GAIN CONTROL
BRIGHT (brightness), CONT (contrast)
BRIGHT (brightness), CONT (contrast)
MENU 3:
WHITE BALANCE
R-CONT (blue-green to red), G-CONT (purple to green),
B-CONT (yellow to blue)
R-CONT (blue-green to red), G-CONT (purple to green),
B-CONT (yellow to blue)
MENU 4:
MODE SELECT
INPUT (input mode), 400LINE (resolution), EXPAND
(screen expansion), LEVEL (level of scaling)
INPUT (input mode), 400LINE (resolution), EXPAND
(screen expansion), LEVEL (level of scaling)
■
The screen display during adjustment
If using Windows, the Adjustment Pattern on the accompanying Moni-
tor Settings Adjustment Disk for Windows can be used.
tor Settings Adjustment Disk for Windows can be used.
If using a computer other than Windows, the adjustment pattern can-
not be used. Display an image that makes the entire screen very
bright, and adjust while watching the screen.
not be used. Display an image that makes the entire screen very
bright, and adjust while watching the screen.
Note: This explanation is based on using the Adjustment Pattern (for
Windows) to make adjustments.
■
Adjusting
1. Press the MENU button. The ADJUSTMENT Menu will be dis-
played.
At this point relevant menu options can be adjusted.
Each time the MENU button is pressed, the next menu is selected.
(MENU 1
(MENU 1
2
3
4
OSD Menu disappears)
Note: The OSD Menu automatically disappears approximately 20
seconds after the last command.
MENU 1: ADJUSTMENT
MANUAL: Individual menu options are manually adjusted.
AUTO:
Every menu option is automatically adjusted
Notes:
•
Press the button to select AUTO.
•
To choose a menu option: SELECT button
•
To go to MENU 2: MENU button
Adjustment pattern
ADJUSTMENT
[
]
CLOCK
1 2 8
8
91
38
38
PHASE
H-POS
V-POS
H-POS
V-POS
AUTO
1 2 8 0 x 1 0 2 4 V : 6 0 H z H : 6 4 k H z
[
]
ADJUSTMENT
[
]
CLOCK
1 2 8
8
91
38
38
PHASE
H-POS
V-POS
H-POS
V-POS
AUTO
1 2 8 0 x 1 0 2 4 V : 6 0 H z H : 6 4 k H z
ADJUSTMENT
[
]
CLOCK
1 2 8
8
91
38
38
PHASE
H-POS
V-POS
H-POS
V-POS
AUTO
1 2 8 0 x 1 0 2 4 V : 6 0 H z H : 6 4 k H z
CLOCK
The figure below demonstrates how to adjust so that vertical flicker
noise is not emitted. (
noise is not emitted. (
buttons)
PHASE
The figure below demonstrates how to adjust so that horizontal flicker
noise is not emitted. (
noise is not emitted. (
buttons)
Note: Adjustments to PHASE should be made only after CLOCK has
been correctly set.
H-POS (horizontal positioning) and V-POS
(vertical positioning)
(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) values.
(
adjust the left-right (H-POS) values and the up-down (V-POS) values.
(
buttons)
MENU 2: GAIN CONTROL
BRIGHT (brightness) and CONT (contrast) are optimized before ship-
ment, but depending on the type of computer being used, further
adjustment may be necessary.
ment, but depending on the type of computer being used, further
adjustment may be necessary.
MANUAL: Individual menu options are manually adjusted.
AUTO:
Every menu option is automatically adjusted using the
Auto Gain Control* function,
Auto Gain Control* function,
Notes:
•
Press the button to select AUTO.
•
To choose a menu option: SELECT button
•
To go to MENU 3: MENU button
*Auto Gain Control function
The Auto Gain Control adjusts contrast and brightness based on
the brightest color of the image displayed. If you are not using the
Adjustment Pattern it is necessary to have an area of at least 5
mm x 5 mm of white image displayed, and if not adjustments may
not be possible. (In such case, [OUT OF ADJUST] will appear and
setting values remain unchanged.)
the brightest color of the image displayed. If you are not using the
Adjustment Pattern it is necessary to have an area of at least 5
mm x 5 mm of white image displayed, and if not adjustments may
not be possible. (In such case, [OUT OF ADJUST] will appear and
setting values remain unchanged.)
BRIGHT (brightness)
Total screen brightness can be adjusted while watching the color
pattern. (
pattern. (
buttons)
CONT (Contrast)
While watching the color pattern, adjustments can be made so that all
graduations appear. (
graduations appear. (
buttons)
MENU 3: WHITE BALANCE
WHITE BALANCE can be adjusted as necessary. (As adjustments
are made before shipment, there is no real necessity for further al-
teration.)
are made before shipment, there is no real necessity for further al-
teration.)
Notes:
•
Not all graduations for COOL and WARM can be displayed.
To display all graduations, set to STD.
To display all graduations, set to STD.
•
Selecting USER will display the setting values for R-CONT,
G-CONT and B-CONT, enabling fine adjustments.
G-CONT and B-CONT, enabling fine adjustments.
•
To choose a menu option: SELECT button
•
To go to MENU 4: MENU button
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-CONT
button for blue-green
button for red
button for red
G-CONT
button for purple
button for green
button for green
B-CONT
button for yellow
button for blue
button for blue
MENU 4: MODE SELECT
The resolution can be adjusted
Notes:
•
To choose a menu option: SELECT button
•
When adjustment complete: MENU button
Vertical flicker noise
Horizontal flicker noise
Screen frame
G A I N C O N T R O L
[
]
BRIGHT
1 2 8
1 2 8
COMT
AUTO
1 2 8 0 x 1 0 2 4 V : 6 0 H z H : 6 4 k H z
Color pattern
W H I T E B A L A N C E
[
]
R - C O N T
1 2 8 0 x 1 0 2 4 V : 6 0 H z H : 6 4 k H z
COOL •
• WARM USER
G - C O N T
B - C O N T
B - C O N T
M O D E S E L E C T
[
]
4 0 0 L I N E
E X P A N D
E X P A N D
M A C
1 2 8 0 x 1 0 2 4 V : 6 0 H z H : 6 4 k H z
L E V E L
6 4 0
O F F
INPUT (Input mode)
The input mode can be set (
buttons)
VESA: VESA mode
MAC:
Power Macintosh mode
400 LINES (degree of resolution)
You can specify the horizontal resolution of a 400-line screen when
using US text, etc. (
using US text, etc. (
buttons)
640
640 x 400 dot mode
720
720 x 400 dot mode (US text etc.)
Note: As the resolution input for other than 400 lines is done auto-
matically, there is no need to set it.
EXPAND (Screen expansion)
For display modes of less than 1280 x 1024 pixels, the display can
be expanded if desired.
be expanded if desired.
(
buttons)
OFF
Expansion off
ON
Expansion on
Notes:
•
Display modes of 1280 X 1024 pixels cannot be changed.
•
If a resolution of 1280 X 1024 pixels cannot be achieved
even after expansion is attempted, the screen’s perimeter
will display black. (This is not a malfunction.)
even after expansion is attempted, the screen’s perimeter
will display black. (This is not a malfunction.)
LEVEL (Level of scaling)
When EXPAND is ON, the sharpness of the image can be adjusted.
(
(
buttons)
Note: When EXPAND is OFF, no adjustments can be made.
Signal timings
Display mode
Hsync
Vsync
Dot
frequency
VESA
640 x 480
31.5kHz
60.0Hz
25.175MHz
37.9kHz
72.0Hz
31.5MHz
37.5kHz
75.0Hz
31.5MHz
43.3kHz
85.0Hz
36.0MHz
640 x 400
37.9kHz
85.0Hz
31.5MHz
720 x 400
37.9kHz
85.0Hz
35.5MHz
800 x 600
35.1kHz
56.0Hz
36.0MHz
37.9kHz
60.0Hz
40.0MHz
48.1kHz
72.0Hz
50.0MHz
46.9kHz
75.0Hz
49.5MHz
53.7kHz
85.0Hz
52.25MHz
1024 x 768
48.4kHz
60.0Hz
65.0MHz
56.5kHz
70.0Hz
75.0MHz
60.0kHz
75.0Hz
78.75MHz
68.7kHz
85.0Hz
94.5MHz
1152 x 864
67.5kHz
75.0Hz
108.0MHz
1280 x 960
60.0kHz
60.0Hz
108.0MHz
1280 x 1024
64.0kHz
60.0Hz
108.0MHz
80.0kHz
75.0Hz
135.0MHz
US text
720 x 400
31.5MHz
70.0Hz
28.3MHz
Display mode
Hsync
Vsync
Dot
frequency
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
75.0Hz
80.0MHz
1152 x 870
68.7kHz
75.0Hz
100.0MHz
Sun Ultra
series
series
1024 x 768
48.3kHz
60.0Hz
64.13MHz
53.6kHz
66.0Hz
70.4MHz
53.6kHz
70.0Hz
74.25MHz
1152 x 900
61.8kHz
66.0Hz
108.01MHz
71.8kHz
76.1Hz
117.01MHz
1280 x 1024
71.7kHz
67.2Hz
117.01MHz
81.1kHz
76.0Hz
134.99MHz
Notes:
•
All are compliant only with non-interlace.
•
Frequencies for Power Macintosh and the Sun Ultra series
are reference values.
are reference values.
•
If the monitor is receiving timing signals that are not com-
patible, [OUT OF TIMING] will appear. Follow your com-
puter’s instruction manual to set the timing to be compatible
with the monitor.
patible, [OUT OF TIMING] will appear. Follow your com-
puter’s instruction manual to set the timing to be compatible
with the monitor.
•
If the monitor is not receiving any signal (synch signal), [NO
SIGNAL] will appear.
SIGNAL] will appear.
■
The connector pin
Input connector diagram (Mini D-sub connector with 15 pins)
Number
Function
1
Red video signal input
2
Green video signal input
3
Blue video signal input
4
GND
5
GND
6
For red video signal GND
7
For green video signal GND
8
For blue video signal GND
9
N.C.
10
GND
11
GND
12
DDC data
13
For Hsync signal input
14
For Vsync signal input
15
DDC clock
5
4
3
2
1
15
14
13
12
11
10
9
8
7
6
CHAPTER 3. TROUBLE SHOOTING
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Check and remedy any failure according to
the following procedure.
the following procedure.
LED color changes in color from orange to
green by pressing power switch?
green by pressing power switch?
See
<An error occurs when
synchronous signal is detected.>
LED comes on in orange soon after RGB
cable is removed?
cable is removed?
See
< An error occurs in power
save mode>.
Back light turn on when RGB cable is
connected?
connected?
See
<Back light goes out
improperly>.
Screen is normal in each video mode?
See
<Screen is not normal>.
No failure.
< An error occurs when synchronous signal is detected.>
Input signal port is the port to which RGB
cable is connected?
cable is connected?
Press INPUT key to switch over input
signal port to the correct one.
signal port to the correct one.
DC+12V is output from the dedicated
AC adapter?
AC adapter?
Check dedicated AC adapter.
Test terminal TP8 shows DC+12V?
Check DC+12V power supply line and power
supply circuit around fuse (DC jack board).
supply circuit around fuse (DC jack board).
Test terminal TP4 shows DC+5V?
Check DC+5V power supply line (MVCC)
and power supply circuit around the IC4.
and power supply circuit around the IC4.
IC34 No. 19 pins signal input is at H level
(DC+5V)?
(DC+5V)?
Check RESET circuit around IC29.
IC34 No. 22 pins signal input is normal?
(See waveform diagram 1.)
(See waveform diagram 1.)
Check clock circuit around IC34 and X1.
IC34 No. 55 pins signal output is at H level
(DC+5V)?
(DC+5V)?
Check the microprocessor control circuits
around IC29 and IC34.
around IC29 and IC34.
Test terminal TP2 shows DC+5V?
Check DC+5V power supply line (BVCC)
and power supply circuit around IC6.
and power supply circuit around IC6.
Test terminal TP6 show sDC+5V?
Check DC+5V power supply line (ANVCC)
and power supply circuit around IC15.
and power supply circuit around IC15.
IC 24 Nos. 8, 9, 17 and 18 pins signal outputs
are normal? (See waveform diagrams 2 and 3)
are normal? (See waveform diagrams 2 and 3)
Check Dsub board, cable and CN5,6.
IC34 Nos 6 and 7 pins signal inputs are
normal? (See waveform diagrams 4 and 5.)
normal? (See waveform diagrams 4 and 5.)
Check signal processing circuit around IC14,
IC17, IC18, IC21, IC38, IC500, IC501 and IC503.
IC17, IC18, IC21, IC38, IC500, IC501 and IC503.
IC34 No. 58 pins signal output is at H level
(DC+5V)?
(DC+5V)?
Continued on the next page.
Check the microprocessor control circuits
around IC29 and IC34.
around IC29 and IC34.
Click on the first or last page to see other LL-T1810A (serv.man10) service manuals if exist.