Sharp llt1820 schematic
q
SERVICE MANUAL
CODE : 00ZLLT1820SME
LCD MONITOR
LL-T1820
MODEL
CONTENTS
CHAPTER 1.
CHAPTER 2.
CHAPTER 3. DISASSEMBLY AND ASSEMBLY. . . . . . . . . . . . . . . . . . . 3 – 1
CHAPTER 4. TROUBLE SHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 – 1
OUTLINE OF THE PRODUCT, NOMENCLATURE AND FUNCTION
CONNECTION, ADJUSTMENT, OPERATION, AND FUNCTIONS
LL-T1820
. . . 1 – 1
. . . . 2 – 1
-H
-B
CHAPTER 5. WAVE FORM. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 – 1
CHAPTER 6. BLOCK DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 – 1
CHAPTER 7. CIRCUIT DIAGRAM. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 – 1
CHAPTER 8. PARTS LAYOUT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 – 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.
This document has been published to be used
SHARP CORPORATION
for after sales servic e only.
The contents are subject to change without notice.
■■■■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.
LL-T1820-H/B SERVICE PRECAUTION
PC-UM10M
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.)
u
SXGA 1280
• Displayable colors (max.)
16.77 million colors (8 bit)
• Brightness (max.)
220cd/m
• Dot pitch
0.2805(H) 0.2805(V) mm
• Contrast ratio
400 : 1
• Angle of visibility
Left-right 170°
• Screen display size
Horizontal 359 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 (enlargement of display to correct VGA/SVGA/XGA)
[1:1, expansion (fixed aspect ratio), expansion (total screen surface)]
• Plug & Play
VESA: DDC2B compatible
• Power management
VESA: based on DPMS
DVI: based on DMPM
• Input signal terminal
Digital / Analog:29 pin DVI-I
• USB hub function
1 upstream port, 2 downstream ports
(bus-powered hub based on USB standard Rev 1.1)
• Screen tilt
Upward 0° - 30°
• Screen swivel
90° from left through right
1024 pixels
2
; Up-down 170°
; downward 0° - 5°
u
Vertical 287.2 mm
u
2
• 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
Maximum 57W (2.9W when in power-saving mode)
(Use special AC adapter.)
• Dimensions (W
395 mm
• Weight (excluding AC adapter)
Approx. 8.9 kg, Display area only, approx. 5.7kg
■
■ DIMENSIONS (Units: mm)
■ ■
507
543
u
D u H)
u
213 mm u 427 mm
324
427
395
463
395
213
277
324
Special AC adapter
Approx. 2.0 m
Approx. W 120 mm u D 60 mm u H 35 mm
Option
Digital signal cable: Approx. 2.0 m
Analogue signal cable:Appr ox. 2.0 m
USB cable: Approx. 1.8 m
LL-T1820-H/B OUTLINE OF THE PRODUCT, NOMENCLATURE AND FUNCTION
1 – 1
PC-UM10M
Relevant signal timings (analog)
Display mode
u
VESA 640
US text 720
Power
Macintosh
series
Sun Ultra
series
• Recommended resolution is 1280 u 1024.
• All are compliant only with non-interlaced.
• Frequen cies for Power M acintosh and the Sun Ultra series ar e reference 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.
480 31.5kHz 60Hz 25.175MHz
u
600 35.1kHz 56Hz 36.0MHz
800
u
768 48.4kHz 60Hz 65.0MHz
1024
u
864 67.5kHz 75Hz 108.0MHz
1152
u
960 60.0kHz 60Hz 108.0MHz
1280
u
1024 64.0kHz 60Hz 108.0MHz
1280
u
400 31.5kHz 70Hz 28.3MHz
u
480 35.0kHz 66.7Hz 30.2MHz
640
u
624 49.7kHz 74.6Hz 57.3MHz
832
u
768 60.2kHz 75Hz 80.0MHz
1024
u
870 68.7kHz 75Hz 100.0MHz
1152
u
1024 64.0kHz 60Hz 108.0MHz
1280
u
768 48.3kHz 60Hz 64.13MHz
1024
u
900 61.8kHz 66Hz 94.88MHz
1152
u
1024 71.7kHz 67.2Hz 117.01MHz
1280
Hsync
(kHz)
37.9kHz 72Hz 31.5MHz
37.5kHz 75Hz 31.5MHz
37.9kHz 60Hz 40.0MHz
48.1kHz 72Hz 50.0MHz
46.9kHz 75Hz 49.5MHz
56.5kHz 70Hz 75.0MHz
60.0kHz 75Hz 78.75MHz
80.0kHz 75Hz 135.0MHz
80.0kHz 75Hz 135.0MHz
53.6kHz 66Hz 70.4MHz
56.6kHz 70Hz 74.25MHz
71.8kHz 76.2Hz 108.23MHz
81.1kHz 76Hz 134.99MHz
Vsync
(Hz)
Dot frequency
(MHz)
Relevant signal timings (digital)
Display mode
u
VESA 640
US text 720
• Recommended resolution is 1280 u 1024.
• 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.
480 31.5kHz 60Hz 25.175MH
u
600 37.9kHz 60Hz 40.0MHz
800
u
768 48.4kHz 60Hz 65.0 MHz
1024
u
864 67.5kHz 75Hz 108.0MHz
1152
u
960 60.0kHz 60Hz 108.0MHz
1280
u
1024 64.0kHz 60Hz 108.0MHz
1280
u
400 31.5kHz 70Hz 28.3MHz
Hsync
(kHz)
37.9kHz 72Hz 31.5MHz
37.5kHz 75Hz 31.5MHz
48.1kHz 72Hz 50.0MHz
46.9kHz 75Hz 49.5MHz
56.5kHz 70Hz 75.0MHz
60.0kHz 75Hz 78.75M Hz
Vsync
(Hz)
Dot frequency
(MHz)
The DVI-I input connector pin
No. Function No. Function
1 TMDS data 2- 16 Hot plug detection
2 TMDS data 2+ 17 TMDS data 03 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
9 TMDS data 1- 24 TMDS clock 10 TMDS data 1+ C1 Analogue red image signal
11 TMDS data 1/3 shield C2
12 N.C. C3
13 N.C. C4 Analogue horizontally
14 +5V C5 Analogue GND
15 GND
23 TMDS clock +
Analogue green image signal
Analogue blue image signal
synchronised signal
LL-T1820-H/B OUTLINE OF THE PRODUCT, NOMENCLATURE AND FUNCTION
1 – 2
PC-UM10M
Power management
The monitor is based on the VESA DPMS*1 and the DVI DMPM*2 standards.
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
DPMS mode Screen
ON Display on 51W Yes Yes
STANDBY Display off 2.9W No Yes
SUSPEND Yes No
OFF No No
*2 DMPM: Digital Monitor Power Management
DPMS mode Screen Power consumption
ON Display on 51W (USB OFF)/57W (USB ON)
OFF Display off 2.9W
Power
consumption
H-sync V-sync
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 monitor.
There are many varieties of DDC due to the differences between systems. This monitor works with DDC2B.
2. TECHNICAL SPECIFICATIONS
Item MIN TYP MAX Unit
Power supply voltage AC 90 100 110 V
Working temperature range +5
Storing temperature range -20
Humidity range 20
u
Visual angle range V ertical (CR
Horizontal (CR
Contrast ratio(CR) (θ = 0°)
Response speed Leading (τr)
Trailing (τd)
Screen white chromaticity (X) 0.278 0.308 0.333
(Y) 0.290 0.320 0.350
White surface luminance (YL) 180 220
Module model number LQ181E1LZ30
*
Specifications and a part of the appearance are subject to change without notice.
10)
u
10)
m
70
m
70
.
.
.
.
.
.
m
85
m
85
400
20
5
+35 °C
+60 °C
85 %RH
.
.
Temperature
Temperature
..
.
.
.
ms
ms
.
.
cd/m
2
PRODUCT DESCRIPTION
1 2 3 4 5 6 7 9 11
8
LL-T1820-H/B OUTLINE OF THE PRODUCT, NOMENCLATURE AND FUNCTION
1. INPUT button: To switch between the signals input terminals. (Input terminal 1
13
12
10
2. MENU button: This button is used to pop-up, select and
close the OSD (On Screen Display) Menu.
3. SELECT button: This button is used to select menu options
when the OSD Menu is displayed.
4.
ed
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 .
5. Power button
6. Power LED: This LED is lit green when in use and orange
when in power-saving mode.
7. USB port (downstream: 2 ports)
1 – 3
0
Input terminal 2)
PC-UM10M
8. USB port (upstream: 1 port)
9. DVI-I input terminal: The computers digital RGB output terminal or
analogue RGB output terminal can be connected here.
For a digital signal input: It can be connected
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 connected, correct display
may or may not be possible.
10. Security lock anchor: By connecting a security lock (purchased
separately) 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.
11. Power terminal
12. Main power switch
13. Ventilation openings:
Note: Never block the ventilation openings as
this may lead to overheating inside the monitor and result in malfunction.
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.
Rotation (long height/width)
The display can be rotated for a long height or width to suit the displayed content.
• Before rotating, move the display to its uppermost position. If the display 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°).
Angle adjustment
Adjust to an easy to view angle.
5
80mm
Note: The orientation of the display can be changed using Pivot Soft-
ware.
30
45
45
LL-T1820-H/B OUTLINE OF THE PRODUCT, NOMENCLATURE AND FUNCTION
1 – 4
PC-UM10M
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.
CONNECTING THE MONITOR TO A COMPUTER
Connecting the monitor to a computer using the accessory signal cable.
• This monitor has two input terminals to enable connection to two
computers. The monitor comes with one analog signal and one digital
signal cable. If both connections are analog, or both are digital, you
will need another signal cable sold separately.
• Digital signal cable: model name NL-C01E
• Analog signal cable: model name NL-C02E
Analog RGB connection
Using the accessory analog signal cable, connect to the analog RGB
output terminal of the computer.
Input terminal 1 and 2
You can connect to
either side.
Analog signal cable
Analog RGB output
terminal
• If the display is to be rotated, first house the cables with the display 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.)
• 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 P ower Macintosh, attach a
Macintosh conversion adapter (to be purchased separately) to the analog signal cable.
Macintosh conversion adapter
LL-T1820-H/B CONNECTION, ADJUSTMENT, OPERATION, AND FUNCTIONS
2 – 1
PC-UM10M
Digital RGB connection
Using the accessory digital signal cable, connect with the digital RGB
output terminal of the computer.
• 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.)
Input terminal 1 and 2
You can connect to
either side.
Digital signal cable
• Paying attention to connector direction, firmly insert the signal
cable to terminal, and then tighten the screws at both sides.
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
this press the POWER button (i.e. turn the power on).
e
button and d button simultaneously, and while doing
Digital RGB output
terminal
CONNECTING THE MONITOR TO A POWER SOURCE
Power terminal
AC outlet
Power cord
CONNECTING A USB DEVICE
This monitor is equipped with a USB standard (Rev. 1.1) self-powered
hub.
Downstream (2 ports)
Each of these ports enables connection of a US B device with working
current up to 500 mA.
Upstream (1 port)
This enables connection of a USB compatible computer or USB hub.
Notes: • If a USB cable is required, please use the one included.
• Before connecting, ensure that the shape of the USB cable
connector is correct.
• For information regarding the USB function (such as set-up)
please refer to the operation manual of the computer to be
connected.
• Some computers, OS and other devices may not be able to
be activated. To ascertain a certain device’s USB compatibility, please contact the manufacturer of the device.
3. Set the input terminal to which the Belkin ADC-DVI adapter is connected to ON.
Use the SELECT button to select [INPUT1] or [INPUT2], and use
the
ed
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.
Downstream
Upstream
USB cable
LL-T1820-H/B CONNECTION, ADJUSTMENT, OPERATION, AND FUNCTIONS
2 – 2
PC-UM10M
TURNING THE POWER ON
1. Turn on the main power of the monitor.
Main power switch
• 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.
Press power button
Turn on the computer
power supply.
CHANGING BETWEEN INPUT TERMINALS
Use the INPUT button to switch between signal input terminals.
Input terminal 1 Input terminal 2
INPUT-1
< >
The input signal type (ANALOG/DIGITAL) is displayed within angle
brackets < >.
INPUT
INPUT-2
< >
TURNING THE POWER OFF
1. Turn the computer off.
2. Press the monitor’s POWER button.
The Power LED will disappear.
Turn the computer off
OFF
Press power button
ON
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 th e first time or after having changed the sy stem 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.
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.
LL-T1820-H/B CONNECTION, ADJUSTMENT, OPERATION, AND FUNCTIONS
2 – 3
2. INSTRUCTIONS FOR ATTACHING A VESA COMPLIANT ARM
PC-UM10M
An arm or stand based on the VESA standard (purchased separately)
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.
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 8 mm ~ 10 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.
8 - 10mm
Screw used to attach arm
Arm
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 monitor.
Notes: • The stand is specially made for use w ith 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.
Part of monitor to which arm is attached
LL-T1820-H/B CONNECTION, ADJUSTMENT, OPERATION, AND FUNCTIONS
2 – 4
PC-UM10M
3. ADJUSTMENT
3-1. ADJUSTMENT METHOD
1) Adjusting the backlight
Buttons
2) Resetting all adjustment values
MENU SELECT
Press the above two buttons at same time, and while turn the power on.
3) ADJUSTMENT menu reser
MENU
4) Adjustment lock function
MENU
Power ON
While pressing the MENU button, turn the power on.
5) Automatic screen adjustment
MENU
ADJUSTMENT AUTO
(for ANALOG)
GAIN
MENU
CONTROL
COLOR
MENU
CONTROL
Power ON
Press the two buttons at same time.
SELECT
SELECT
SELECT
SELECT
SELECT
SELECT
SELECT
CLOCK
PHASE
H-POS
V-POS
AUTO
BLACK LEVEL
CONTRAST
COLOR MODE (sRGB, STD, VIVID)
buttons
buttons
buttons
buttons
buttons
buttons
buttons
buttons
WHITE BALANCE WHITE BALANCE
COOL STD
MENU
WARM USER
buttons
SELECT
SELECT
SELECT
MENU
MODE SELECT OSD H-POSITION
MENU
GMMA
HUE
SATURATION
SELECT
SELECT
SELECT
SELECT
SELECT
OSD V-POSITION
OSD PIVOT
400 LINES
SCALING
LANGUAGE
END
6) Version display (for service)
Power ON
MENU
SELECT
Display the software version.
Press the above two buttons at same time, and while turn the power on.
LL-T1820
VERSION 1.00
2001. 12. 10
CHECKSUM BOOT
buttons
buttons
buttons
buttons
buttons
buttons
buttons
buttons
MENU
SELECT buttons
SELECT
SELECT
SELECT
R-CONTRAST
G-CONTRAST
B-CONTRAST
buttons
buttons
buttons
7) Aging (for service)
Power ON
Red
3
Green 3 Blue 3 Yellow 3 Purple 3 Light Blue 3 White 3 Black
SELECTMENUINPUT
When the test is terminate, Power off.
LL-T1820-H/B CONNECTION, ADJUSTMENT, OPERATION, AND FUNCTIONS
2 – 5
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