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  LG Electronics Components Datasheet  

L1720B Datasheet

COLOR MONITOR SERVICE MANUAL

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L1720B pdf
Website:http://biz.LGservice.com
E-mail:http://www.LGEservice.com/techsup.html
COLOR MONITOR
SERVICE MANUAL
CHASSIS NO. : CL-43
MODEL:
L1720B (L1720BL-AL**R)
( ) **Same model for Service
CAUTION
BEFORE SERVICING THE UNIT,
READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
*To apply the Mstar Chip.
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  LG Electronics Components Datasheet  

L1720B Datasheet

COLOR MONITOR SERVICE MANUAL

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L1720B pdf
CONTENTS
SPECIFICATIONS ................................................... 2
PRECAUTIONS ....................................................... 3
TIMING CHART ....................................................... 4
OPERATING INSTRUCTIONS ................................ 5
WIRING DIAGRAM ................................................. 6
BLOCK DIAGRAM ................................................... 7
DESCRIPTION OF BLOCK DIAGRAM.....................8
ADJUSTMENT ...................................................... 10
TROUBLESHOOTING GUIDE .............................. 11
PRINTED CIRCUIT BOARD................................... 15
EXPLODED VIEW...................................................17
REPLACEMENT PARTS LIST ...............................19
SCHEMATIC DIAGRAM ......................................... 22
SPECIFICATIONS
1. LCD CHARACTERISTICS
Type
: TFT SXGA LCD
Size : 17 inch
Pixel Pitch
: 0.264 (H) x 0.264 (V)
Color Depth
: 16.2M colors
Electrical Interface : LVDS
Surface Treatment : Hard-coating(3H)
Operating Mode
: Normally White
Backlight Unit
: Top/Bottom edge side 4-CCFL
(Cold Cathode Fluorescent Lamp)
2. OPTICAL CHARACTERISTICS
2-1. Viewing Angle by Contrast Ratio 10
Left : -60° min., -70°(Typ) Right : +60° min., +70°(Typ)
Top :+50° min., +60°(Typ) Bottom : -45°min., -60°(Typ)
4. Max. Resolution
Analog
: 1280 x 1024 / 75Hz
5. POWER SUPPLY
5-1. Power : AC 100-240V~, 50/60Hz , 1.0A
5-2. Power Consumption
MODE
H/V SYNC VIDEO POWER CONSUMPTION LED COLOR
POWER ON (NORMAL) ON/ON ACTIVE less than 40 W
BLUE
STAND-BY
OFF/ON OFF
less than 2 W
AMBER
SUSPEND
ON/OFF OFF
less than 2 W
AMBER
DPMS OFF
OFF/OFF OFF
less than 2 W
AMBER
2-2. Luminance
: 200(min), 250(Typ)
2-3. Contrast Ratio : 300(min), 400(Typ)
3. SIGNAL (Refer to the Timing Chart)
3-1. Sync Signal
• Type
: Separate Sync,
SOG (Sync On Green)
Composite Sync
3-2. Video Input Signal
1) Type
2) Voltage Level
a) Color 0, 0
b) Color 7, 0
c) Color 15, 0
3) Input Impedance
: R, G, B Analog
: 0~0.71 V
: 0 Vp-p
: 0.467 Vp-p
: 0.714 Vp-p
: 75
3-3. Operating Frequency
Horizontal
: 30 ~ 83kHz
Vertical
: 56 ~ 75Hz
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)
FullUp Position
Width
: 394 mm (15.51'')
Depth
: 232 mm (9.13'')
Height
: 379 mm (14.92'')
Folded Position
Width
Depth
Height
: 394mm (15.51'')
: 127mm (9.13'')
: 412mm (14.92'')
8. WEIGHT (with TILT/SWIVEL)
Net. Weight
Gross Weight
: 4.5 kg (9.92 lbs)
: 7.6 kg (16.76 lbs)
-2-
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  LG Electronics Components Datasheet  

L1720B Datasheet

COLOR MONITOR SERVICE MANUAL

No Preview Available !

L1720B pdf
PRECAUTION
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.
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.
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.)
CAUTION
Please use only a plastic screwdriver to protect yourself
from shock hazard during service operation.
-3-
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Part Number L1720B
Description COLOR MONITOR SERVICE MANUAL
Maker LG
Total Page 28 Pages
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