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40_50L2546/56 Service manual
Caution
Be sure to read this manual before servicing. To ensure safety from fire, electric shock, injury, harmful
radiation and materials, various measures are provided in this LCD Television.
Be sure to read cautionary items described in the manual before servicing.
These servicing instructions are for use by qualified service personnel only. To reduce the risk of electric
shock, do not perform any servicing other than that described in the operating instructions unless you are
qualified to do so.
Service Warning
1. Since the Panel Module and the front Filter are made of glass, handling the broken Module and Filter
carefully and with caution in order not to receive injury.
2. Replacement work should be started after the Panel Module and the AC/DC Power supply have become
sufficiently cool.
3. Special care should be taken when working near the display area in order not to damage its surface.
4. The Panel Module should not be touched with bare hands in order to protect its surface from blemishes
and damage.
5. It is recommended that you use clean soft gloves during the replacement work in order to protect not only
the display area of the Panel Module but also yourself.
Contents
1. Features.................................3 6.
2. 2. Specifications...........................4 Service points.............................13
3. Component names.....................9 7. Adjustment.................................14
4. Side Inputs..............................10 8. TTroubleshooting..........................20
5. Remote Control........................11
1
CAUTION FOR SAFETY
Please read this page before repair the monitor.
The following safety precautions are designed to help you stay safe and prevent accidents during the repair
work.
Please take note of these cautionary flags.
Warning This means "Potential to sustain injury or even death."
Caution This means "Potential to sustain breakage or irreparable damage."
Also note these cautionary icons
This means "CAUTION" This means "MUST"
This means "POTENTIAL ELECTRIC
This means "DO NOT"
SHOCK"
WARNING
Follow instructions. Must use same types of wires and
components.
The cabinet, chassis, and labels are parts The Monitor uses special tubes and tapes
that require attention. You must follow the made from insulated materials. Moreover,
caution notes and safety instructions some materials are kept from making
presented throughout this User Manual to contact with the PWB for the sake of
prevent damage to them or injury to safety.Internal leads are kept from hot
yourself. parts or high voltage parts by means of
clamps or other measures. As such, you
Prevent electric shock. must restored these parts to their original
Exercise caution while working on the conditions in order to prevent electric
device as the Monitor contains high shock or fire.
voltage parts and power supply.It is
possible to sustain severe injury or death Perform safety check when done.
if you accidentally touch the wrong
parts.You must disconnect the power Every part (such as removed screws,
supply while servicing, reassembling, or components, and wiring) must be restored
change parts. If you touch a live to their prior conditions after servicing.Be
connection it is possible to sustain severe sure to check everything that was
injury or death. repaired for damage or mistakes. Also
measure the insulated impedance with a
Use recommended components. meg-ohm meter to confirm that the
Use only the recommended components impedance value is more than 4M ohm.If
or componentst that structurally identical the impedance value is less than 4M ohm,
to the originals. This is to ensure safety then electric shock or fire may result.
and reliability. Pay special attention to
parts in the parts list and circuit diagrams
Do not try to check the HDCP code and
marked with . If you use
non-recommended components, then combination circuit.
electric shock or fire may result. Never remove the shield case protecting
the HDCP code and combination circuit.
2
PRECAUTIONS
Cleaning the LCD panel of the television
Please make sure to unplug the power cord before cleaning the television.
Wipe the panel with a lint-free and dry cloth in order to prevent damage to the panel surface.
Do not use a chemical cloth or cleaner. Depending on the ingredients, it may cause discoloration and
damage the panel surface.
Do not wipe with a hard cloth or rub hard. It may hurt the panel surface.
In case of the greasy dirt such as fingerprint, wipe with a lint-free cloth moistened by a diluted neutral
detergent solution, and then wipe with a soft and dry cloth.
Do not use a spray cleaner. It could cause malfunction.
Cleaning the monitor's cabinet of the television
The following may cause crack, deformation, and paint peeling.
Do not wipe the cabinet with benzene, thinner, and other chemical products.
Do not spray volatile solutions such as insecticide over the cabinet.
Do not leave the cabinet in prolonged contact with plastic or rubber materials.
Do not use a chemical cloth, cleaner or wax. Depending on the ingredients, it may cause crack and
deformation.
Use a lint-free cloth to clean the cabinet and control panel of the television. In case of the heavy dirt,
wipe with a soft cloth moistened by a diluted neutral detergent solution, and then wipe with a soft and
dry cloth.
Never use the following detergents. It could cause crack, discoloration, and scratch.
Acid/ alkaline detergent, alcoholic detergent, abrasive cleaner, powder soap, OA cleaner, car wax, glass
cleaner, etc.
1. Features
Large-screen and high-definition LCD panel.
Improved Digital signal processor.
Accept more digital input devices with HDMI terminals.
Great diversity of connecting terminals to cover wide range of audio-visual equipments.
Enjoy the image from PC with large, high-definition LCD screen.
Easy-to-use On-Screen Display system operating with Remote control.
Low power consumption.
3
2. Specifications
SPECIFICATION 40L2546/56 50L2546/56
Display dimensions
Panel 878.112 (H) x 485.352 (V) mm 1095.84 (H) x 616.41 (V) mm
Resolution 1920(H) x 1080 (V) pixels 1920(H) x 1080 (V) pixels
including Stand: 904 (W) x 567 (H) x including Stand: 1122 (W) x 701(H) x
Net dimensions
194(D) mm 216(D) mm
Net weight including Stand: 11.0 kg including Stand: 16.5 kg
Operating: 5