LG Flatron L1810B User manual

MENU
SOURCE
AUTO/SELECT
COLOR MONITOR
SERVICE MANUAL
CAUTION
BEFORE SERVICING THE UNIT,
READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
CHASSIS NO. : CL-42
FACTORY MODEL: LB800K
MODEL: L1810B(LB800K-VL)

1. LCD CHARACTERISTICS
Type : TFT Color LCD Module
Size : 18.1inch(45.974cm diagonal)
Pixel Pitch : 0.2805(H) x 0.2805(V)
Color Depth : 8-bit, 16,777,216 colors
Electrical Interface : LVDS
Surface Treatment : Anti-Glare, Hard Coating(3H)
Operating Mode : Normally Black
Backlight Unit : Six-CCFL (Cold Cathode
Fluorescent Lamp)
2. OPTICAL CHARACTERISTICS
2-1. Viewing Angle by Contrast Ratio
≥ 10
Left : -60° min., -80°(Typ)
Right : +60° min., +80°(Typ)
Top : +60° min., +80°(Typ)
Bottom : -60° min., -80°(Typ)
2-2. Luminance : 200(min), 250(Typ)
2-3. Contrast Ratio : 200(min), 350(Typ)
3. SIGNAL (Refer to the Timing Chart)
3-1. Sync Signal
• Type : Separate, Composite,
SOG (Sync On Green)
Digital
3-2. Video Input Signal
1) Type : R, G, B Analog
2) Voltage Level : 0~0.71 V
a) Color 0, 0 : 0 Vp-p
b) Color 7, 0 : 0.467 Vp-p
c) Color 15, 0 : 0.714 Vp-p
3) Input Impedance : 75 Ω
3-3. Operating Frequency
Horizontal : 30 ~ 83kHz
Vertical : 56 ~ 75Hz
4. MAX. RESOLUTION
Analog : 1280 x 1024@75Hz
DVI Analog/Digital : 1280 x 1024@60Hz
5. POWER SUPPLY
5-1. Power Adaptor(Built-in Power)
Input : AC 100~240V, 50/60Hz , 1.0A
5-2. Power Consumption
6. ENVIRONMENT
6-1. Operating Temperature: 10°C~35°C (50°F~95°F)
(Ambient)
6-2. Relative Humidity : 10%~80%
(Non-condensing)
6-3. MTBF : 50,000 Hours(Min)
7. DIMENSIONS (with TILT/SWIVEL)
Width : 406 mm (15.98'')
Depth : 223 mm (8.77')
Height : 427 mm (16.81'')
8. WEIGHT (with TILT/SWIVEL)
Net. Weight : 7.8kg (17.19 lbs)
Gross Weight : 10.0kg (22.04 lbs)
9. USB
Upstream : 1 port, Downstream : 2 port
Speed : Full-12Mbps, Low-1.5Mbps
CONTENTS
SPECIFICATIONS
- 2 -
SPECIFICATIONS ................................................... 2
PRECAUTIONS ....................................................... 4
TIMING CHART ....................................................... 5
OPERATING INSTRUCTIONS ................................ 6
WIRING DIAGRAM ................................................. 8
BLOCK DIAGRAM ................................................... 9
DESCRIPTION OF BLOCK DIAGRAM...................10
ADJUSTMENT ...................................................... 12
TROUBLESHOOTING GUIDE .............................. 13
PRINTED CIRCUIT BOARD................................... 18
EXPLODED VIEW...................................................22
REPLACEMENT PARTS LIST ...............................24
PIN CONFIGURATION............................................28
SCHEMATIC DIAGRAM......................................... 31
MODE
POWER ON (NORMAL)
STAND-BY
SUSPEND
OFF
POWER OFF
H/V SYNC
ON/ON
OFF/ON
ON/OFF
OFF/OFF
-
POWER CONSUMPTION
less than 53 W
less than 3 W
less than 3 W
less than 3 W
less than 1 W
LED COLOR
GREEN
AMBER
AMBER
AMBER
OFF
VIDEO
ACTIVE
OFF
OFF
OFF
-

- 3 -
Signal Connector Pin Assignment
Pin Signal (DVI-I)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
T. M. D. S. Data2-
T. M. D. S. Data2+
T. M. D. S. Data2/4 Shield
T. M. D. S. Data4-
T. M. D. S. Data4+
DDC Clock
DDC Data
Analog Vertical Sync.
T. M. D. S. Data1-
T. M. D. S. Data1+
T. M. D. S. Data1/3 Shield
T. M. D. S. Data3-
T. M. D. S. Data3+
+5V Power
Ground
(return for +5V,
H. Sync. and V. Sync.)
Pin Signal (DVI-I)
18
9
17 24
16 C1
C4
C3
C2
C5
16
17
18
19
20
21
22
23
24
C1
C2
C3
C4
C5
Hot Plug Detect
T. M. D. S. Data0-
T. M. D. S. Data0+
T. M. D. S. Data0/5 Shield
T. M. D. S. Data5-
T. M. D. S. Data5+
T. M. D. S. Clock Shield
T. M. D. S. Clock+
T. M. D. S. Clock-
Analog Red
Analog Green
Analog Blue
Analog H. Sync.
Analog Ground
T. M. D. S. (Transition Minimized Differential Signaling)
• DVI-I Connector (Digital/Analog)

- 4 -
WARNING FOR THE SAFETY-RELATED COMPONENT.
•There are some special components used in LCD
monitor that are important for safety. These parts are
marked on the schematic diagram and the
replacement parts list. It is essential that these critical
parts should be replaced with the manufacturer’s
specified parts to prevent electric shock, fire or other
hazard.
•Do not modify original design without obtaining written
permission from manufacturer or you will void the
original parts and labor guarantee.
TAKE CARE DURING HANDLING THE LCD MODULE
WITH BACKLIGHT UNIT.
•Must mount the module using mounting holes arranged
in four corners.
•Do not press on the panel, edge of the frame strongly
or electric shock as this will result in damage to the
screen.
•Do not scratch or press on the panel with any sharp
objects, such as pencil or pen as this may result in
damage to the panel.
•Protect the module from the ESD as it may damage the
electronic circuit (C-MOS).
•Make certain that treatment person’s body are
grounded through wrist band.
•Do not leave the module in high temperature and in
areas of high humidity for a long time.
•The module not be exposed to the direct sunlight.
•Avoid contact with water as it may a short circuit within
the module.
•If the surface of panel become dirty, please wipe it off
with a softmaterial. (Cleaning with a dirty or rough cloth
may damage the panel.)
WARNING
BE CAREFUL ELECTRIC SHOCK !
•If you want to replace with the new backlight (CCFL) or
inverter circuit, must disconnect the AC adapter
because high voltage appears at inverter circuit about
650Vrms.
•Handle with care wires or connectors of the inverter
circuit. If the wires are pressed cause short and may
burn or take fire.
PRECAUTION
CAUTION
Please use only a plastic screwdriver to protect yourself
from shock hazard during service operation.

TIMING CHART
- 5 -
VIDEO
SYNC
B
D
CFE
A
<< Dot Clock (MHz), Horizontal Frequency (kHz), Vertical Frequency (Hz), Horizontal etc... (µs), Vertical etc... (ms) >>
H + 31.469 800 640 16 96 48
V–70.8 449 350 37 2 60
H + 37.879 1056 800 40 128 88
V + 60.317 628 600 1 4 23
H–31.469 800 640 16 96 48
V–59.94 525 480 10 2 33
H–37.5 840 640 16 64 120
V–75 500 480 1 3 16
H–31.468 900 720 18 108 54
V + 70.09 449 400 12 2 35
H + 46.875 1056 800 16 80 160
V + 75.0 625 600 1 3 21
H+/–49.725 1152 832 32 64 224
V+/–74.55 667 624 1 3 39
H–48.363 1344 1024 24 136 160
V–60.0 806 768 3 6 29
H–60.123 1312 1024 16 96 176
V–75.029 800 768 1 3 28
H+/–68.681 1456 1152 32 128 144
V+/–75.062 915 870 3 3 39
H+/–61.805 1504 1152 18 134 200
V+/–65.96 937 900 2 4 31
H + 63.981 1688 1280 48 112 248
V + 60.02 1066 1024 1 3 38
H + 79.976 1688 1280 16 144 248
V + 75.035 1066 1024 1 3 38
Mode H/V
Sort
1
2
3
4
5
6
7
8
9
10
11
12
13
25.175
28.321
25.175
31.5
40.0
49.5
57.283
65.0
78.75
100.0
92.978
108.0
135.0
640x350
70Hz
800x600
60Hz
640x480
60Hz
640x480
75Hz
720x400
70Hz
800x600
75Hz
832x624
75Hz
1024x768
60Hz
1024x768
75Hz
1152x900
75Hz
1152x900
65Hz
1280x1024
60Hz
1280x1024
75Hz
Sync
Polarity Frequency
Dot
Clock Total Period
(E)
Video Active Time
(A)
Sync Duration
(D)
Back Porch
(F)
Front Porch
(C)
Resolution

- 6 -
FRONT VIEW
Front Control Panel
REAR VIEW
OPERATING INSTRUCTIONS
MENU
SOURCE
AUTO/SELECT
L1811B
Front Control Panel
Power Connect
USB Port
213 46 5
1. Power ON/OFF Button
Use this button to turn the monitor on or off.
2. Power Indicator
This indicator lights up green when the monitor
operates normally. If the display is in DPM(Energy
Saving)mode, this indicator color change to amber.
3. MENU Button
Use these buttons to enter or exit the On Screen Display.
4. ▼▲◀▶ Button
Use these buttons to choose or adjust items in the On Screen
Display. Bring up Contrast and Brightness
adjustment.
5. AUTO/SELECT Button
Use this button to enter a selection in the On Screen Display.
* AUTO adjustment function
When adjusting your display settings,
always press the AUTO/SELECT
button before entering the On Screen
Display(OSD). This will automatically
adjust your display image to the ideal settings for the current
screen resolution size (display mode).
The best display mode is 1280x1024/60Hz.
6. SOURCE Button
Use this button to make Dsub or DVI connector active.
This feature is used when two computers are connected to the
monitor. The default setting is Dsub.
DVI Connect D-Sub Signal
Connect
100
100
PROCESSING
AUTO CONFIGURATION

- 7 -
Making use of USB (Universal Serial Bus)*
USB (Universal Serial Bus) is an innovation in connecting your different desktop peripherals conveniently to your computer.
By using the USB, you will be able to connect your mouse, keyboard, and other to your monitor instead of having to
connect them to your computer. This will give you greater flexibility in setting up your system. USB allows you to connect
chain up to 120 devices on a single USB port, and you can “hot”plug (attach them while the computer is running) or unplug
them while maintaining Plug and Plug auto detection and configuration. This monitor has an integrated BUS-powered USB
hub, allowing up to 2 other USB devices to be attached it.
USB connection
1. Connect the upstream port of the Display to the downstream port of the USB compliant PC or another hub using the
USB cable. (Computer must have a USB port)
2. Connect the USB compliant peripherals to the downstream ports of the monitor.
NOTE
To activate the USB hub function, the monitor must be connected to a USB compliant PC(OS) or another hub with the USB
cable(enclosed).
When connecting the USB cable, check that the shape of the connector at the cable side matches the shape at the connecting
side.
Even if the monitor is in a power saving mode, USB compliant devices will function when they are connected the USB ports(both
the upstream and downstream) of the monitor.
USB downstream Port
connect the cables from USB
compliant peripherals-such as
keyboard, mouse, etc
This is a simplified representation
of rear view.
To USB downstream port
of the USB compliant PC or
another hub cable

MODULE
MATAL FRAME
J702
J703
J706 P902
J710
CN1A
CN2
CN3
CN4
CN7
CN6
CN5
CN1
- 8 -
WIRING DIAGRAM
Connector Ass’y P/N: 6631T11012P
Connector Ass’y P/N: 6631T25008Q
Connector Ass’y P/N:
6631T12002L
Connector Ass’y P/N:
6631T12002M
Connector Ass’y P/N:
6631T20015R

- 9 -
D-SUB DVI-I
Gm5120
including
(MCU/ADC / TMDS Rx )
LVDS
(LVDS823)
Flash Memory
H-Sync A
V-Sync A
H-Sync DA V-Sync DA
Out - CLK
DE ,H/V Sync out
R,G,B Even
LCD Module
R,G,B
differential LVDS:Low Voltage Differential Signaling
Data 8 Bit or 16 Bit
Add ress
R,G,B even, odd
Power
Digital Signal
5V
3.3V
Reg.
DVDD 3.3VAVDD 3.3V
ADC CLK
U/S
D/S
USB
HUB
12V
AC Input
AVDD 2.5V 2.5V
Reg.
DVDD2.5V
AVDD2.5V
3.3V
Reg.
PVDD 3.3V
5V 5V
D/S
Bus-power USB
Input
Selector
(BA7657)
R,G,B, H/V Sync
Inverte r Output Inverter
12V
BLOCK DIAGRAM

- 10 -
DESCRIPTION OF BLOCK DIAGRAM
1. Input signal switching part.
There are two inputs which are analog and digital input.
They come from each 15 pin D-Sub and 24 pin DVI-D connector.
2. Video Controller Part.
This part amplifies the level of video signal for the digital conversion and
converts from the analog video signal to the digital video signal using a pixelclock.
The pixel clock for each mode is generated by the PLL.
The range of the pixel clock is from 25MHz to 135MHz.
This part consists of the Scaler, Flash-ROM IC which stores program data,Reset IC.
The Scaler gets the video signal converted analog to digital, interpolates input to 1280 X 1024 resolution signal and
outputs R, G, B signal to transmitter.
The controlled data of each modes and user setting is stored in EEPROM
Especially Micom/pre-amp / ADC / Video controller are merged to one chip ‘Gm5120’by Genesis.
3. Display Data Transmitter Part.
This part transmit digital signal from the Scaler to the receiver of module.
4. Power Part.
This part consists of the one 5V, two 3.3V and one 2.5 regulators to convert power which is provided 12V, 5V in
LIPS Board.
5V is provided for LCD Panel.
Also, 5V is converted 3.3V and 2.5V by regulator. Converted power is provided for IC in the main board.