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

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LCD TV Service Manual
POWER BOARD MAIN BOARD

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LCD TV Service Manual
4-2 Video Processing Part
MAIN BOARD

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LCD TV Service Manual
4-3 Audio Processing Part

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LCD TV Service Manual
5. Service Mode And Adjustment
5-1 Service Mode
Use the remote control, first open MAIN MENU with MENU button,and
choose AUDIO SETTING with the CHANNEL UP/DOWN button,then choose the
BALANCE with VOLUME UP/DOWN,In this condition,press 0、5、3、2,you can
enter factory menu.
5-1-1、Fac. Menu
1、White Bal：
NO. NAME DEFAULT ALTERNATIVE
VALUE REMARKS
1 RDRV 187 Adjustment white balance use
2 GDRV 192 Adjustment white balance use

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LCD TV Service Manual
2、Factory Init Set Channel
Clear Rom(It is best not to use)
3、Option：
NO. NAME DEFAULT ALTERNATIVE VALUE REMARKS
1 To Factory U M
2 Lang English
3 ATS 1
4 Country 24
5 Logo HisenseAnyview
6 LVDS_ICTRL 0
4、auto color：
NO. NAME ALTERNATIVE VALUE REMARKS
1 ADC CVBS auto calibration AV、S-video
2 ADC Graphic auto calibration VGA
3 ADC Component auto calibration YPbPr
5、Version
NO. NAME REMARKS
1 Soft Ver LCD1906EU_B1.01.20060928
2 PanelType CHI_MEI_V190C1_L01
3 Resolution 1440×900
4 Tuner Xuguang TDQ6FT_W126H
5 Flash SST 39VF088
5-1-2、Design Menu
1、Picture Mode：
NO. NAME ALTERNATIVE
VALUE REMARKS NO. NAME ALTERNATIVE
VALUE REMARKS
Standard 2 Contrast 70
1 Brightness 50 3 Colour 60
2 Contrast 50 Soft Mode
3 Colour 50 1 Brightness 40
3 BDRV 190 Adjustment white balance use
4 Bright 50 No use
5 Contrast 50 No use
6 Color 50 No use

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LCD TV Service Manual
Bright 2 Contrast 60
1 Brightness 70 3 Colour 50
2、Sound Mode
NO. NAME ALTERNATIVE
VALUE REMARKS NO. NAME ALTERNATIVE
VALUE REMARKS
Standard 2 Bass 80
1 Treble 50
2 Bass 50 Speech Mode
1 Treble 80
Music Mode 2 Bass 20
1 Treble 20 3
3、Picture setting
NO. NAME ALTERNATIVE
VALUE REMARKS NO. NAME ALTERNATIVE
VALUE REMARKS
1 Min Bright 0 7 Min Color 0
2 Mid Bright 115 8 Mid Color 125
3 Max Bright 147 9 Max Color 160
4 Min Contrast 0 10 Min Sharp 10
5 Mid Contrast 125 11 Mid Sharp 100
6 Max Contrast 162 12 Max Sharp 180
4、Sound Setting：
NO. NAME ALTERNATIVE VALUE REMARKS
1 Min Volume 65
2 Mid Volume 111
3 Max Volume 127
4 80 Volume 120
5 20 Volume 108
6 Devitation 32
7 Prescale 14
8 Scart prescale 32
5、Saving Mode:
NO. NAME DEFAULT ALTERNATIVE VALUE REMARKS
1 Standard 255
2 Saving 1 128
3 Saving 2 0
6、Option:
NO. NAME DEFAULT ALTERNATIVE VALUE REMARKS
1 SPAmplitude 3

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LCD TV Service Manual
2 SPPeriod 15
3 AGCGain 8
4 FlyWheel Off
5 NCOWindow 55
6 HSyncSelect NCO
7 ovrGain 0
8 MultiOption 0
9 CTS Auto-Adj On
6. Software Updating
Firstly，setup the updating software of Gprobe 5.
Secondly, copy the folder of HudsonEuro to C:/ if you update for the first time ,
then the past program should be covered by the latest one (namely
hudson_pal_asia_tv.hex)
Thirdly, the special serial line links the RS232 port in computer to the one labeled
RS232 in TV, then open TV.
Fourthly, open Gprobe, then press Options->Connection Setup (Figure 1) or F10, when
you will find the dialog of Connection Settings (Figure 2):
Press the Connection label, you should set Device as Serial and set Protocol as
SERIAL1;
Press the Serial label, you should set Port as the one you are using and set Baud
as 115200, the other settins are like Figure 3.

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LCD TV Service Manual

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LCD TV Service Manual
Finally, input the command of Batch "c:\HudsonEuro\HudsonEuro.bat"
into the command line, then press Enter. Like Figure 4.

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LCD TV Service Manual
During updating, if you find the follows :
DebugOn: Command Successful.
SetBuffer: Command Successful.
Delay: Command Successful.
Reset: Command Successful.
RAMWrite: Command Successful.
Run: Command Successful.
Delay: Command Successful.
Erasing FLASH... Done.
Delay: Command Successful.
Writing FLASH...
- Start address: 0x00018000
- Buffer size: 532816 ( 0x00082150 ) Bytes
- Minimal address space required: 20 bits
Please waiting, the process will spend more than 50s
If you find:
Timeout while waiting for response. Check connections and reset board.(Error
Code:00000002)
Error executing batch file at line 1.
Execution time: 1.15s
Please check the Gprobe settings, and whether the serial line is linked correctly,