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1. Precautions and Safety Notices 

 

Prior to using this service manual,please ensure that you have carefully followed all the procedures  outlined in 

the user's manual for this product. 

(1)

  Read all of  these instructions. 

(2)

  Save these instructions. 

(3)

  Follow all warnings and instructions a marked on the product. 

(4)  

Unplug this product from the wall outlet before cleaning.Do not use liquid cleaners or aerosol cleaners, use 

a damp cloth for cleaning. 

(5)

  Do not use this product near water. 

(6)

  Do not place this product on an unstable cart,stand or tablle.The product may fall,causing serious 

     damage to the product. 

(7) 

 Do not tear up the EMI label, if the label has been destroyed,that must to past same size label on the same 

position. 

(8)

  Slots and openings in the cabinet and the back or bottom are provided for ventilation,to ensure reliable 

operation of the product and to protect it from overheating,those openings must not be blocked or 

covered.The openings should never be blocked by placing the product on a bed,sofa, rug, or other similar 

surface.This product should not be placed in a built-in installation less proper ventilation is provided.  

(9)

  This products should be operated from the type of power source indicated on the marketin label. If you are 

not sure of the type of power available, consult your dealer or local power company

 

(10)

  This product is equipped with a 3-wire grounding type plug,a plug having a third (grounding) pin. This 

plug will only fit into a grounding-type power outlet. This is a safety feature, if you are unable to insert the 

plug into the outlet, contact your electrician to replace your obsolete outlet. Do not defeat the purpose of 

the grounding-type plug. 

(11)

 Pay attention to the code which connects with apheliotropism board of inside panel.and don’t hook it. 

(12) 

Do not allow anything to rest on the power cord.Do not locate this product where persons will walk on the 

cord. 

(13)

 If an extension cord is used with this product,make sure that the total of the ampere ratings on the 

product plugged into the extension cord to the waplugged into outlet does not exceed 15 ampere. 

(14) 

Never push objects of any kind into this product through cabinet slots as they may touch dangerous 

voltage points or short out parts that could result in a risk of fire or electric shock.Never spill liquid of any 

kind on the product. 

(15)

 Do not attempt to service this product yourself,as opening or removing covers may expose you to 

dangerous voltage points or other risks.Refer all servicing to service personnel. 

(16)

 Unplug this product from the wall outlet and refer servicing to qualified service personnel under the 

following conditions : 

a.

 

 When the power cord or plug is damaged or frayed. 

b.

 

 If liquid has been spilled into the product. 

c.

 

 If the product has been exposed to rain or water. 

d.

 

 If the product does not operate normally,when the operating instructions are followed.Adjust only those   

controls that are covered by the operating instructions since improper adjustment of other controls may 

result in damage and will often require extension work by a qualified technician to restore the product to 

normal operation. 

e.

 

 If the product has been dropped or the cabinet has been damaged. 

f.

 

 If the product exhibits a distinct change in performance,indicating a need for service. 

 

 

Содержание LT1504S

Страница 1: ...LT1504S Service Manual ...

Страница 2: ...ty Notices 1 2 Specification 2 3 Front Panel Function Control Description 8 4 Adjusting Procedure 13 5 Trouble Shooting Flow Chart 16 6 Exploded Diagram and Spare Parts List 19 7 Block Diagram 20 8 Schematic Diagram 21 9 PCB Layout Diagrams 31 ...

Страница 3: ...t the plug into the outlet contact your electrician to replace your obsolete outlet Do not defeat the purpose of the grounding type plug 11 Pay attention to the code which connects with apheliotropism board of inside panel and don t hook it 12 Do not allow anything to rest on the power cord Do not locate this product where persons will walk on the cord 13 If an extension cord is used with this pro...

Страница 4: ...Normally white Brightness 250 cd m2 typical Contrast Ratio 400 1 typical Brightness Uniformity 75 min Viewing Angle 120 H 100 V at CR 10 Color Chromaticity CIE White x 0 313 y 0 329 typical Frame Rate 60Hz Response Time 16ms typical Surface Treatment Hard Coating 3H Anti glare Haze 25 INPUT Source Connector types Inputs Outputs Signals Video Format OSD Main TV Analog TV PAL SECAM PH Type TV CABLE ...

Страница 5: ...nput output SCART 21pin VIDEO3 SCART IN YPbPr Component Y Pb Cb Pr Cr L R Audio 480i 576i 480p 576p 720p 1080i RCAx3 RCAx2 Red White VIDEO4 YPbPr PC VGA VGA IN PC AUDIO IN Analog RGB VGA 15 Pin VIDEO5 VGA IN AC IN Power Switch AC Power IN AC 100 240V YC14 AC IN Note A SCART connector B VGA Connector ...

Страница 6: ...B Analog Level Impedance 0 7Vp p 75Ω DDC 1 2B Compliant with Revision 1 0 Sync H V separate 3V TTL level 1kΩ Frequency Fh 31 80 kHz Fv 56 76 Hz Maximum Pixel Clock 135 Mhz Connector Mini VGA 15 pin female x 1 Video Composite CVBS Signal Format NTSC 4 43NTSC PAL_M PAL B G H D N SECAM Level Impedance 1 0Vp p 75Ω S Video Y C Signal Format Y C Level Impedance Y 1 0Vp p 75Ω C 286 mV 75Ω Analog HD15 Vid...

Страница 7: ...48 07 50 SVGA 800x600 75 46 9 49 5 XGA 1024x768 60 48 36 65 0 XGA 1024x768 70 56 47 75 XGA 1024x768 75 60 02 78 75 SXGA 1280x1024 60 64 108 Video S Video AV Timing STANDARD RESOLUTION V FREQ Hz H FREQ kHz CLK MHz NTSC 525 60 15 734 12 65 PAL B G H D I 625 50 15 625 14 50 SECAM 625 50 15 625 14 50 4 43NTSC 525 60 15 734 12 65 HDTV Component AV Timing SDTV 480p 720x480 60 31 461 27 SDTV 480i 720x480...

Страница 8: ... 8 Ohm Signal Connector Pin Assignment Pin Assignment Pin Assignment Pin Assignment 1 Red 6 Red Ground 11 Ground 2 Green 7 Green Gro und 12 SDA 3 Blue 8 Blue Ground 13 Horizontal Sy 4 Ground 9 Not Connected 14 Vertical Sync 5 Self Test 10 Sync Ground 15 SCL ...

Страница 9: ...7 3 Front Panel Function Control Description Operation Adjust and Programming ...

Страница 10: ...8 ...

Страница 11: ...9 ...

Страница 12: ...10 ...

Страница 13: ... f to select the color Temperature to be User Warm or Cool User Live Pop Sound mode Rock Press e fto change Sound Mode to be User Live POP and Rock Volume Press e fto adjust the Volume from 0 to 100 Base Press e fto change the Bass from 0 to 100 Treble Press e fto change the Treble from 0 to 100 Balance Press e fto adjust the Balance from 0 to 100 Audio setup Mute Press e fto adjust the Mute on or...

Страница 14: ...ou to adjust the position of the picture left and right in the window Press VOLUME to adjust the Sharpness from 0 to 100 V Position Allows you to adjust the position of the picture left and right in the window Press VOLUME to adjust the Sharpness from 0 to 100 Clock AControls the width of the picture based on the VGA mode VGA setup Phase Allows you to improve focus clarity and image stability Pres...

Страница 15: ... G B and adjust the Color Temp of white image to be x 295 20 y 305 20 Y 200 cd m2 c cool Brightness and Contrast 50 Select the cool to enter the adjustment option of R G B Automatically adjust the value of R G B and adjust the Color Temp of white image to be x 281 20 y 288 20 Y 200 cd m2 TV mode test Factory TV signal or TV signal generator Output PAL signal Check if the picture is normally displa...

Страница 16: ... or approved equipment Play DVD test disc VIDEO ESSENTIALS A 1 Set DVD to interlaced output z Select SOURCE then choose S VIDEO z Sending the signal from DVD test disc sixth paragraph z Switch DVD output mode from NTSCand PAL Watch the screen to check if has switch NTSC PAL 480P 480i switch DVD Component Cable or TVSignalGENERTO R FLUKE 54200 or approved equipment Play DVD test disc VIDEO ESSENTIA...

Страница 17: ... z Press to set balance z The default is 50 e Mute z Press to set balance z The default is off Surround Mode DVD VCD plays music or DVD disc z Press to set ON OFF z Check if the sound has change z The default is OFF NICAM GENERTOR FLUKE 54200 or approved equipment z Press I II button on the remote z Check if the sound has change Super Freq test Pattern Generator VGA Cable z Check if OSD displays s...

Страница 18: ...ON OFF switch LED Color change Check KEY LED board J7 LCD TV ON Check Video Audio Function Make sure the LVDS connection of LCD Panel is fine U16 Pin3 High Check the A D board tuner U16 Pin3 Check Inverter Power 24V of LCD Panel OK B Display Check Video Audio Function A Check AC Socket Change AC Socket Fuse or power board C Change AD Board ...

Страница 19: ...YES YES NO B U16 PIN5 Active low See Panel SPEC Change the LCD Panel Display Check Video Audio Function Change AD Board A Check the connection of Signal cable Display Check Video Audio Function Change AD Board Change AD Board ...

Страница 20: ...3 OK OK OK NG NG No TV VIDEO and VGA Picture Change AD Board No Audio Change Speaker Check A D board J4 Check Speaker Check Video Audio Function Change AD Board or U2 Check Video Audio Function Check Video Audio Function OK C ...

Страница 21: ...19 6 Exploded Diagram and Spare Parts List ...

Страница 22: ...dio L R Composite Audio L R S video Audio L R Compoment Audio L R VIDEO AUDIO Composite SIF 7 Block Diagram U12 HDMI VGA AV S video YPbPr TV SCART U9 MST97885LD 96885LD PANEL 1024 768 U2 Audio amp U8 Earphone AMP U7 DDR ...

Страница 23: ...21 8 Schematic Diagram ...

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Страница 33: ...32 9 PCB Layout Diagram Keypad Board Component Side Top Keypad Board Component Side Bottom IR LED Board Component Side Top IR LED Board Component Side Bottom ...

Страница 34: ...33 Main Board Component Side Top ...

Страница 35: ...34 Main Board Component Side buttom ...

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