LCD COLOUR TV

MAINTENANCE MANUAL

MODEL: LS07 CHASSIS

Please read this manul carefully before maintenance.

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CATALOG CHAPTER1 Safety and notes ........................................................................................................2

1-1 Installation notes.............................................................................................................2 1-2 Attention points of operation and using .......................................................................2 1-3 Storage notes ..................................................................................................................2 1-4 Dismantling notes ...........................................................................................................2 1-5 High-voltage warning ....................................................................................................2

CHAPTER2 Whole machine standard and terminal functions...............................................2 2-1 Basic standards : ...............................................................................................................3 2-2 Introduction of terminals(practicality photos)...............................................................3

CHAPTER3 Main chip functions and brife introductions of power supply...........................4 3-1 Main chips and functions of LS07 chassis ...................................................................4 3-2 Pin function description of LS07 chips ...........................................................................6 3-3 Brief introduction of power supply …………………………………………………11

CHAPTER4 The chasis frame diagram,mainboard power supply system, mainboard interfac -e definition and the waveform of key points………………………… ………………………...12

4-1 The chassis frame diagram…..…………………………………………………….........12 4-2 Power supply system…………………………………………………………………...13 4.3 The waveform of key points……………………………………………………………16

CHAPTER5 Software upgrade tooling,software upgrade instrutions,software initialization, parameter selection,software initialization,software version and the screen matching instruction… ………………………………..…………………………………………………….16

5-1 Software upgrade tooling . …………………………………………………………16 5-2 Software upgrade instrutions.. ………………………………………………………17 5-3 Software initialization.. ………………………………………………………………18 5-4 Parameter selection........................................... ……………………………………...19 5-5 Software version...........................................................................................................20 5-6 The screen matching instructions...............................................................................20

CHAPTER6 Classical accident maintenance procedures and examples ..............................20 6-1 The thinking of do not boot............................................................................................21 6-2 Common problems for reference................................................................................21

CHAPTER7 High voltage and high electric current wearing parts list................................21 CHAPTER8 Factory mode parameter setting instructions and notes ...............................22

8-1 Enter into the factory mode ........................................................................................22 8-2 Setting method of factory menu…………………………………….……….............25 CHAPTER9 Simple debugging specification of the machine…………………………... ......25 9-1 Clear EEPROM,and set the parameters after upgrading according to the upgrade instr -uctions ……………………………………………………………………..……………………..25 9-2Check each channel/source to see if the image and sound are normal……………………...25 Appendix:LS07 chassis circuit schematic………...........................................................…………26

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Chapter1:Safety and notes 1-1 Installation notes (1) Please don't beat or rub,scratch the surface of the CRT screen heavily,don’t touch it with hand casually. (2) When the screen is dirty,please clean it with absobent cotton or cotton cloth slightly. (3) Please clean it timely when water or other viscosity pollution fall,which may make the CRT face or colour change. (4) Please don’t make the LCD screen shocked by a strong external force. 1-2 Attention points of operation and using (1) Please unplug the power cable before moving LCD scree. (2) Please don’t change the mainboard’s original setting,if not,brightness,white balance etc.may not meet the specification. (3) Radiation of long time use at room temprature is larger than at low temeperature. (4) Please note that the long displaying image may remain at the top when shutdown the machine . (5) Please avoid the impact from moble phone to protect your TV. 1-3 Storage notes (1)When store for a long time,please keep the temperature between 0to 40,don’t expose the TV to the sun,the humidity should be less than 85％RH. (2)Please don’t put your TV under high humidity and higt temperature circumustance,e.g temperature: 60,humidity:85%RH. (3)Please don’t put your TV under low temperature circumustance,e.g temperature lower than 25. 1-4 Dismantling notes (1)As LCD screen is easy to be damaged,when dismantle,please attention to protect. (2)Please attention the postion of each screw when dismantle,in case to beat the wrong position when install which

may lead to crack or slide of the face frame. (3) If you need to dismantle the power board or the mainboard,please attention the position and dirction of each

line,especially the dirction of the screen line,in case of causing accident when install.Before dismantle ,we can take some photos of the line route for the comparison of installing.

(4)After check and maintenance,please assure that there is no foreign body in the machine when install. 1-5 High-voltage warning The high-voltage of the LCD screen is generated by the power supply step-up board,without attention to exposure to high voltage,one may meet a serious electic shock.

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Chapter2: Whole machine standard and terminal functions 2-1 Basic standard

item standard

visual area 18.5” inches（opposite angles）(BOE)

aspect ratio 16:9 resolving ratio 1366 x768 visual area H x V 409.8m m (H) ×230.4m m (V) display colour 16.7 million contrast 1000 brightness 250cd/m2 visual angle 170°(horizontal)/ 170° (vertical)

react time 5ms

backlight life 50000 hours

the parameters are for reference only,the specific should accord to the standard of the screen practicality of the batch orders

LCD Panel

colour temperature cold/hot

sound system B/G、D/K、I、M TV function

olour system PAL / SECAM / NTSC AV1 RCA x 1 AV2 S-Video x 1

Audio L/R x 1

aberration signal YPbPr x 1 suppot to1080P ，Audio L/R x 1, HDMI HDMI x1 support to1080P

plug and use

input frequency H: 31.5K -50KHz V: 60Hz to 75Hz

audio and video signal input

PC input

recommend 1024x768(60HZ)

Videooutput outputCVBS signal outputTV and AV signal ,Audio L/R x 1 two 5W innerput speakers

Audio Audio output L / R ear phone

Power power supply AC100V~240V, 50/60Hz power disipation <60W

Panel rotation Front/back/rotation - 5° / + 20° / ± 35°

requirement for circumustance operation temperature storage temperature operation humidity

+ 0° ~ + 40° ， - 25 ° ~ + 60° 10% ~ 85%

appearance size W x H x D

net weight no accessory Kg

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2-2 Introduction of terminals(practicality photos)

ATTENTION: 1. HDMIand YpbPr suppot to 1080P； 2.The recommendation resolving ratio of VGA is 1024X768； 3.Both AV and S terminal use audio signal to output. 4. Av output supports Tv input /AV output，Av input /AV output，S input 入/AVoutput。

Chapter3:Main chip functions and brife introductions of power supply

3-1 Main IC and functions of LS07

ear phone

AVinput S input

AV output

HDMI inputVGA inpiut

RF input

YpbPr input

PC audio input

YpbPr audio input

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no. item no. model main function

1 U25 TAF6-C2I21VH Tuner, output sound IF and video signal

2 U13 TSUMV26KE Processor with Video Decoder

3 U14 24LC32B/SN EEPROM

4 U15 W25X40AVSNIG Flash deposit,the control program of the whole machine is in it

5 U20 AO4083A DC switch

6 Z1 HDAF38A2D sound meter

7 Z2 HDVF38A1DC sound meter

8 U10 TDA7266SA Audio amplifier

tuner Processor with Video Decoder

sound meter

sound amplifier

flash

DC switch

storage

quartzs crystal

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3-2 Pin function description of LS07 chip 3-2-1. TSUMV26KEProcessor chip with Video signalTSUMV26KE

The following tables are the specific distribution of pin function Table1:Related pin function distribution of the machine interface unit

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Table2: Related pin function distribution of the analog interface

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Table3:Related pin function distribution of the analog audio signal input and output

Table4: Related pin function distribution of DVI/HDMI

Table5: Pin function distribution of LVDS

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Table6: Pin function distribution of the intermediate frequency signal

Table7: Pin function distribution of common input and output

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Table8: Pin function distribution of misc interface

Table9: Pin function distribution of power supply interface

3-2-2: Pin function of TAF6-C2I21VH tuner

No. Terminal name Description

1 AGC AGC voltage supply

2 NC No Connected

3 GND Address-select line

4 SCL Assemble line(clock)

5 SDA Assemble line(data)

6 5VB 5V Power supply

7 5VB 5V Power supply

8 ADC/NC Analog data conversion/ No Connected

9 +33V 33V Power supply

10 NC No Connected

11 IF1 IF Output

3-2-3．W25X40AVSNIG Pin function

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Pin No. Pin Name I/O Function

1 /CS I Chip Select Input

2 DO O Data Output

3 /WP I White Protect input

4 GND Ground

5 DIO I/O Data Input/Output

6 CLK I Serial Clock Input

7 /HOLD I Output holding

8 VCC Power Supply

3-2-2:AO4803pin function Dual-channel enhanced MOSFET

pin sign function description 1 S2 source2

2 G2 gate2 3 S1 source1 4 G1 gate2

5,6 D1 drain1 7,8 D2 drain2

3.3.Brief introduction of power supply

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Chapter4: The chassis frame diagram, mainboard power supply systems,

mainboard interface definition and the waveform of key points This chapter mainly introduce the chassis frame diagram,power supply system,interface definition and each key point’s wave shape. 4-1 The chassis frame diagram

ACinput AC100-240V

GND

GND

ADJ

O/F

12V

12V

GND

GND

5V

5V

High-voltage AC inverter output, backlight lamp use. High voltage is dangerous!

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4-2 Power supply system Powe board has two kinds of output voltage:+12and+5

4-2-1.the logic relation diagram of main board power L31 R126 PWwave surge R138 R114 +12_INA

L2

L32 L4 L5 L18

R113 R213 R215 R214 L1 R233 R233 4-2-2.Pin voltage of the voltage adjustor on the mainboard

+12V_IN

power

CON14

PIN 5，6

reset circuit

power supply

VDD

PM

U20 +12V

key press

supply power

AVDDMPLL

remote controller

light supply power

+5V_1

power

JP3

PIN3，4

U17

U3

U20 VDDP supply power

40V 33V,RFH(high frequency head) supply

DVD 12V supply power

TDA1517 12Vsupply power

U1 +3.3_STB

Rem

ote controller

receiver board

supply

LED

CTL、WAKE

UP

Screen

eletricit

+5V_2

+3.3V_2

AVDDA supply power

AVDD

AV supply power

AVDDAVIF

supply power

U15,Flash supply power

VCC1.26V

supply

Backlightbringhtness t

ll

Back light

switch

CON12,PIN1.2

Audio signal DC

level

U28 Audie sw

itch l

U2 Video sw

itch pow

er supply

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item no. U20 U3 U4 U19 U17 U1

output

voltage

5V,12V 3.3V 1.26V 5V 5V 3.3V

4-2-3Interface definition

PIN5,6 =5V PIN7,8=12V

3.3V

3.3V 5V 1.26V

5V

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GND

GND

5V

5V

12V, 12V,OPBACK,DIMMING, GND, GND

G1,R1,IR-IN,GND,3.3V

SAR1,SAR0,GND

AMP-PR

GND

AMP-PL

GND

used for software upgrading

Used for factory

write KEY

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4.3 The waveform of key points

Chapter5: Software upgrade tooling,software upgrade instrutions ,parameter

setting,software initialization,software version and screen matching instructions 5-1 Software upgarde tooling---there are two kinds of using upgrade tooling 1.Use the combined interface(the parallel port) upgrade tooling:use the upgrade programme: ISP_Tool V4.0.5.exe（and higher versions） 2.Use interface upgrade tooling,use the upgrade programme: versions higher than ISP Tool V4.3exe

computer upgrade tooling LCD TV

Combined interface or USB

VGA

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5-2 Software upgrade instrutions 1.Connect the upgrade tooling well,then operate the upgrade programme

Cancel the selection in the red line frame of last picture,as following shows:

2.Select(connect)first,if normal,system will feedback the flash style of the machine chassisAs following

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3.Select (read),read the programme needs to write, as following

4.Select(auto),enter the programme writing period,you only need to press(run),you will be able to write programme. 5-3 Software initialization Afrter finishing the software upgrading,enter into the factory menu,select CLEAR EEPROM，clear EEPROM.

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The system will go into standby automatically after clearing EEPROM. 5-4 Parameter selection After clearing EEPROM,you need to do some parameter selection works,for example: 5-4-1.Enter the system setting,,as the following picture.Select SYSTEM SETTING to enter:

5-4-2.You have following parameters to select in SYSTEM SETTING:

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Usually,items in the red frame need to debugt,but not everyone,the specific debugging should satisfy the actual requirements of the batch orders. 5-5 Software version Related programme information can be read from the software version,which is convenient for professors to know the software states.

5-6 Screen matching instructions

Chapter6:Classical accident maintenance procedures and examples 6-1 The thinking of don’t boot

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→ 6-2 Common problems for your reference: To speed you to dignose and solve problems,the following commom problems are offered for your reference

Symptoms Possible Reason Solutions

No picture, no sound, and no indicator light on

1.The power cord is not plugged in 2.The power is off

1.Plug in the power cord 2.Turn the power on

do not boot Check if controller receiver works normally

check if the working condition

of main IC is normal

check every voltage accord to the

mainborad power logic diagram

check if FLASH

works normally

change the main chip

check if the reset circuit

works normally

Change the

main chip

check if the service circuit

works normally

check if the

assemble

check if 5V,12V are too

rush when boot

check if 5V,12V

works normally

change power board

check if each chip on the assemble

line works normally change the chip

no image

black screen

no sound

flowery or white screen

check the

backlight voltage Change the screen

check the circuit related to

the mainboard

check the screen line

check the screen and the

mainboard crossly

change the screen or examine

the mainboard

check if there is signal

entering into the main

chip of each source

check if there is signal output

from the main chip

Check if there is output

from the amplifier

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abnormity Picture and sound with

1.Contrast, sharpness, and color are set improperly

2.Color system is improperly 3.Sound system is improperly

1.Adjust the numberical value of Contrast, sharpness, and color

2.Set the Color system to the country broadcasting standard

3.Set the Sound system to meet the country’s broadcasting standard

Picture is spotted or with snow Signal source is low-grade or the signal cord is in a lower quality Use the qualified signal cord

Contrast, brightness, color and volume are all in the minimum value or TV is in mute mode.

Adjust the value of contrast, brightness, color and volume No picture, no sound and

indicator light is green The signal cable is not correctly connected.

Connect the signal cable correctly

Blue screen, AV or SVIDEO is displayed

There is no signal input or the video cable is not connected or incorrectly connected

Connect the video cable correctly

Picture is unclear or shaking or with black horizontal strips (in VGA mode)

VGA picture is not centered

VGA picture is not correctly adjusted.

Enter “SETUP” menu, select “Auto Tracking” item to perform automatic calibration and adjust “Phase” to solve the problem

No sound There is no audio signal input or audio cable is not connected correctly

Connect the audio cable correctly

VGA picture display with improper color

The color temp is adjusted incorrectly by user

Readjust the color temp, or select the original color setting

HDMI source, with snow pixel of full screen The signal source is not normal Plug the HDMI cable again

The remote control does not work

Batteries are improperly installed or exhausted

1. Make sure the positive and the negative polarities are correct.

2.Check if there is a loose contact between the batteries and the springs

3.Replace the batteries

Chapter7: High voltage and high current wearing parts list The introduction of maintenance parts are for reference only, modification of parameters will not be informed any more. For accurate data and related specifications, please consult the newest data of our company.

Number Name Model number

The damageable percentage（‰）

1. Main Board JUG6.690.664-02 1

2. controller receiving board

JUG6.695.398 0.5

3. Keyboard JUG6.694.409-01 0.5

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4. Power supply IP0150207 5 5. LCD screen HT185WX1-100 0.1 6. Electronic tuner TAF6-C2I21VH 0.5

7. Dynamoelectric speaker

YDT3070-C1-5W-4Ω 2

8. Video signal processing chip

TSUMV26KE 1

9. Audio amplifier TDA1517 1 Chapter8: Factory mode parameter setting instructions and notes

8-1 Enter into the factory mode Switch on TV set, and make it works normally: ① Press 【INPUT】 key on the remote control ② Press number keys “3”、“1”、“3”、“8” on remote control to enter password. Finish entering the factory mode.

If you want to quit the factory mode, Please. press【Power】key to switch off the TV. ⑴Factory menu displays as bellow：

Adjust item Adjust content Adjust method Remark SYSTEM SETTING System setting 【﹥】、【﹤】key CLEAR EEPROM Clear EEPROM 【﹥】、【﹤】key AGING MODE Aging switch 【﹥】、【﹤】key

PANEL Panel parameter

select 【﹥】、【﹤】key

ADC ADJ ADC adjustment 【﹥】、【﹤】key YPBPR、PC available

PICTURE MODE Picture mode 【﹥】、【﹤】key

Switch the four state”STANDARA、

SOFT、VIVID、USER”at each source

COLOR TEM Colour

temperature 【﹥】、【﹤】key

Switch thethree state” NORMAL、WARM、COLD”at each source

SOUND MODE Sound mode 【﹥】、【﹤】key Switch the four state” THEATER、MUSIC 、 USER 、 NEWS”at each source

EEPROM ADJUST NON LINEAR

MULTI-LANGUAGE Mult-country

language 【﹥】、【﹤】key

OTHER OPTION Parameter setting 【﹥】、【﹤】key

SSC SETTING Spread spectrum setting

【﹥】、【﹤】key For EMC use

FACTORY IR Factory remote

control switch 【﹥】、【﹤】key

SOURCE Input switch 【﹥】、【﹤】key Select input signal (2) Use the key 【】/【】on remote control to select items that need to adjust,，use the key 【﹥】/【﹤】to adjust them. Submenu content： SYSTEM SETTING

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adjust item adjust value remark LANGUAGE OSDlanguage selectION POWER MODE boot mode once,twice boot mode switch LOGO OFF LOGO switch EQUALIZER OFF USB OFF USB switch DVD OFF DVDswitch

TUNER TAF6C2121VH switch of radio frequency head(RFH) select

INPUTTYPE 1A1S input terminal select IRTYPE G6C52R select the remote control model AUDIOTYPE 2X2W select the output power of speaker H-OVERSCAN 51 horizontal overscan V-OVERSCAN 30 vertical overscan H-CAPTION 135 horizontal center

V-CAPTION 130 vertical center

TURNOFFPANEL OFF switch of the screen when change channel or source

DEBUG ENABLE ON TTX-MTS ENABLE ON

PICTURE MODE

adjust item adjust value remark SOURCE TV reveal the present signal source PICTURE MODE USER select the picture mode to adjust CONTRAST 50 no need of adjustment BRIGHTNESS 50 no need of adjustment SATURATION 50 no need of adjustment SHARPNESS 50 no need of adjustment

COLOR TEMP

adjust item adjust value remark SOURCE TV display the present signal source COLOR TEMP NORMAL no need of adjustment R 128 no need of adjustment G 128 no need of adjustment B 123 no need of adjustment OFFSET R 128 no need of adjustment OFFSET G 128 no need of adjustment OFFSET B 128 no need of adjustment

SOUND MODE

adjust item adjust value remark SOURCE TV display the present signal sourc

带格式表格

带格式表格

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SOUND MODE NEWS select the sound mode BASS 30 no need of adjustment TREBLE 40 no need of adjustment 120HZ 90 no need of adjustment 500HZ 90 no need of adjustment 1500HZ 90 no need of adjustment 5KHZ 90 no need of adjustment 10KHZ 90 no need of adjustment AVC LEVEL 124 PRESCALE 110

NON LINEAR

adjust item adjust value remark VOLUME volume no need of adjustment BASS bass no need of adjustment TREBLE treble no need of adjustment CONTRAST contrst no need of adjustment BRIGHTNESS brightness no need of adjustment SHARPNESS sharpness no need of adjustment SATURATION saturation no need of adjustment

8-2 Setting method of factory menu

⑴ Seledt the setting item Operators can choose setting item with【P+】and【P-】key, font with background display means the item has been

chosen. Press【V+】key to enter sub directory. Use 【P+】and 【P-】keys on remote control to select up and down, then use【V+】and【V-】keys to set. (2)Most of the menu functions are open under factory mode, if need,item checking and effect test can be done by using menu . (3) TV signal switching can be done by directly pressing the number keys in factory mode .Press【MENU】to back to the parental catalog,press【EXIT】 to quit factory mode.

Chapter9:Instructions of simple factory debugging specification. 9-1 Clear EEPROM,and set the parameters after upgrading according to the upgrade instructions. 9-2 Check each channel/source to see if the image and sound are normal.

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Appendix:LS07 Chassis Circuit Schematic

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