BBK LT1914S User manual

Liquid Crystal Display Television
Service Manual
Chassis： HUDSON
Product Type：LT1914S/LT1514S

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LCD TV Service Manual
Contents
Contents ...............................................................................................................................................................- 2 -
Service Manual ...................................................................................................................................................- 3 -
1. Product Safety Servicing Guidelines...................................................................................................- 3 -
1-1 Fire And Shock Precautions.........................................................................................................- 3 -
1-2 Warning ...............................................................................................................................................- 4 -
2. Product Function Specifications...........................................................................................................- 4 -
2-1 LCD1933EU Product Function.........................................................................................................- 4 -
2-2 LCD1906EU Product Function.........................................................................................................- 6 -
2-3 LCD1933EU Specifications .............................................................................................................- 7 -
2-4 LCD1906EU Specifications .............................................................................................................- 8 -
3. Lcd Panel Spec .............................................................................................................................................- 9 -
3-1 General Description .......................................................................................................................- 9 -
3-2 General Features ...........................................................................................................................- 10 -
4. Block Diagram .............................................................................................................................................- 10 -
4-1 Chassis Block Diagram .................................................................................................................- 10 -
4-2 Video Processing Part .................................................................................................................- 12 -
4-3 Audio Processing Part .................................................................................................................- 13 -
5. Service Mode And Adjustment.................................................................................................................- 14 -
5-1 Service Mode ...................................................................................................................................- 14 -
6. Software Updating .....................................................................................................................................- 17 -
7. Explode View And Bom ...............................................................................................................................- 21 -
7-1 LCD1933EU Explode View And Bom.................................................................................................- 22 -
7-2 LCD1906EU Explode View And Bom.................................................................................................- 23 -
7-3 LCD1533EU Explode View And Bom.................................................................................................- 24 -
7-4 LCD1504EU Explode View And Bom.................................................................................................- 24 -
9. Ciruit Diagram ...........................................................................................................................................- 24 -

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LCD TV Service Manual
Service Manual
1. Product Safety Servicing Guidelines
1-1 Fire And Shock Precautions
1、Adequate ventilation must be provided to prevent heat build up inside
unit. Keep the inside of unit free from foreign objects, such as hairpins,
nails, paper, etc. Do not build the set into a bookcase or other enclosures
in which it would be poorly ventilated. Do not place it on carpet or a
bed as low ventilation boles could become obstructed.
2、 Do not set liquids, including flower vases and vessels filled with
chemicals or water etc., On top of the unit as liquid could get inside
the unit. If a hazardous object falls inside the TV set, unplug it
immediately and call a qualified technician for removal.
3、 When placing or moving the TV set, take care to insure that the
power cord is fitted into the allocated slot.
To avoid damage to the power cord, never allow heavy objects such as
the TV set itself to be placed on the power cord. Keep cord away from
radiating appliances. Do not allow cord to become knotted or tangled. Do
not lengthen the cord. When removing the power plug from the socket, always
hold onto the plug, never pull by the cord.
4、 This TV set shall be connected to a main socket outlet with a
protective earthing contaction.
5、 The main plug and main switch should be remain readily operable
after installation.

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LCD TV Service Manual
6、 No nacked flame sources, such as lighted candles, should be placed
on the apparatus.
7、 Minimum distances around the apparatus for sufficient ventilation
8、 The use of apparatus in moderate climates.
1-2 Warning
1、 During vacation or other occasions when you will not be using the
set for an extended period, remove the power plug from the socket.
2、 This appliance should not be operated by children or infirm persons
without adequate supervision.
The lightning flash with arrowhead symbol, within an
equilateral triangle is intended to alert the user to the
presence of uninsulated dangerous voltage within the products
enclosure that may be of sufficient magnitude to constitute a risk of
electric shock.
The exclamation point within an equilateral triangle is
intended to alert the user to the presence of important
operating and maintenance( servicing ) instructions in the literature
accompanying the set.
2. Product Function Specifications
2-1 LCD1933EU Product Function

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LCD TV Service Manual

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LCD TV Service Manual
2-2 LCD1906EU Product Function

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LCD TV Service Manual
2-3 LCD1933EU Specifications

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LCD TV Service Manual
2-4 LCD1906EU Specifications

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LCD TV Service Manual
3. Lcd Panel Spec
3-1 General Description
LCD1933EU’S Lcd Panel is a 19” TFT Liquid Crystal Display module
with 4 CCFL Backlight units and 30 pins 2ch-LVDS interface. This
module supports 1440 x 900 WXGA+ mode and can display 16.2M colors.
The inverter module for Backlight is not built in.

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LCD TV Service Manual
3-2 General Features
4. Block Diagram
4-1 Chassis Block Diagram