lt27h -32f-37f

Service Manual

Model No.：LT27HGN 50AAP

LT32FGN 50AAP

LT37FGN 50AAP

Type No. :

TV Display

TABLE OF CONTENT 1. Precautions and Safety Notices ................................................................................................................ 3 2. Specification ............................................................................................................................................. 4

2.1. 27-inch General specification (Quick Reference) ............................................................ 4 2.2 32-inch General specification: ............................................................................................ 6 2.3 37-inch General specification: ............................................................................................ 8 2.4. PCB Assembly test ............................................................................................................. 10 2.5. Instrument Test.................................................................................................................... 12 2.6 Picture performance test. .................................................................................................. 13 2.7. Factory preset. .................................................................................................................... 14 2.8. Power Supply tests............................................................................................................. 15 2.9. DDC test............................................................................................................................... 15 2.10. Audio test: ............................................................................................................................ 15 2.11. TV Channel Table. .............................................................................................................. 16 2.12 Preset Timing Chart & Reference Timing Table ............................................................. 18 2.13 PC analog and HDMI timing: ............................................................................................ 19 2.14. DDC Contents ..................................................................................................................... 20 2.15. HDMI-HDCP test................................................................................................................. 23

3. Front Panel Function Control Description.............................................................................................. 24 3.1 User control ......................................................................................................................... 24 3.2 OSD Functions.................................................................................................................... 27

IMAGE SETTING ................................................................................................................ 27 DISPLAY SETTING............................................................................................................. 30 AUDIO SETTING ................................................................................................................ 32 TV SETTING........................................................................................................................ 34 TV SETTING........................................................................................................................ 34 GENERAL SETTING........................................................................................................... 35 OSD MESSAGE ................................................................................................................... 37

4. Circuit Description.................................................................................................................................. 38 4.1 Interface Board.................................................................................................................... 38

5. Adjusting Procedure ............................................................................................................................... 44 5.1 Enter / exit the factory mode method............................................................................... 44 5.2 PC mode alignment ............................................................................................................ 44 5.3 Component 1 & 2 mode alignment .................................................................................. 44 5.4 Composite mode alignment. ............................................................................................. 44

6. Trouble Shooting Flow Chart ................................................................................................................. 45 6.1 No Display on Screen (Screen is black, no power) ....................................................... 45 6.2 No Sound (Test signal: 0.5Vrms sine waveform) ........................................................... 47

APPENDIX A. Block &Schematic Diagram......................................................................................... 48 APPENDIX B. PWB Layout ................................................................................................................. 49

Main board.............................................................................................................................................. 49 Key board ............................................................................................................................................... 53 LVDS board ............................................................................................................................................ 54 Front board ............................................................................................................................................. 55 IR board 57

APPENDIX C. Block & Schematic diagram......................................................................................... 59 Main board.............................................................................................................................................. 59 Front board ............................................................................................................................................. 70 IR board 71

APPENDIX D. ................................................................................................................................................ 72 Recommend Spare Parts List ( For LT27HGN 50AAP)......................................................................... 72 Recommend Spare Parts List ( For LT32FGN 50AAP) ......................................................................... 76 Recommend Spare Parts List ( For LT37FGN 50AAP) ......................................................................... 80

1. Precautions and Safety Notices

Prior to using this manual, please ensure that you have carefully followed all the procedures outlined in the user manual for this product.

• Read all of these instructions.

• Save these instructions for later use.

• Follow all warnings and instructions marked on the product.

• Do not use this product near water.

• This display should be installed on a solid horizontal base.

• When cleaning, use only a neutral detergent cleaner with a soft damp cloth. Do not spray with liquid or aerosol cleaners.

• Do not expose this display to direct sunlight or heat. Hot air may cause damage to the cabinet and other parts.

• Adequate ventilation must be maintained to ensure reliable and continued operation and to protect the display from overheating. Do not block ventilation slots and openings with objects or install the display in a place where ventilation may be hindered.

• Do not install this display near a motor or transformer where strong magnetism is generated. Images on the display will become distorted and the color irregular.

• Do not allow metal pieces or objects of any kind fall into the display from ventilation holes.

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 never be placed near or over a radiator or heat register. This product should not be placed in a built-in installation unless proper ventilation is provided.

2. Specification 2.1. 27-inch General specification (Quick Reference)

Panel size / type: 27” Color TFT Active Matrix LCD, Hard coated (3H), anti-reflective coating.CMO: V270B1-L01 (1366X768).

Pixel dimension: 0.1455 x 3 mm(H) x 0.4365 mm(V). Native/optimum resolution: 1366X768. Aspect ratio: 16:9. Response time: 8ms. (typical). Contrast ratio: 1000:1 (typical). Maximum brightness: 550 nits (Center, typical). Viewing angles: (Contrast ratio ≥ 20)

Horizontal : ± 88° (typical). Vertical : ± 88° (typical).

Display colors: 16.7 million True Color (24-bit). Color saturation (NTSC) : 75%. Active display area (H x V): 596.259 mm (H) x 335.232 mm (V) (27”). PC compatible frequency: VESA Standard Timing: 1360x768, 1280x1024, 1024x768, 848x480,

800x600, 640x480,720x400; H: 30 ~ 80 KHz, V: 50 ~ 75Hz.

HDTV compatibility (Component): 480i, 480P, 720P, 1080i. (for Brazil PAL-M) Native/optimum resolution: 1366X768. Video Compatibility (CVBS, S-Video) PAL-M/PAL-N/NTSC. Tuner Compatibility PAL-M/PAL-N/NTSC. Video Features Faroudja IntelliComb technology.

DCDi (Directional correlational de-interlacing). Low angle processing (Smooth diagonal edges). Faroudja true life video enhancement. CCS (Cross color suppressor). 3D comb filter. Noise reduction. MPEG noise reduction. Auto cinema mode 3:2 Pull down. Aspect ratio conversion (Standard / Fill / Zoom) Freezing picture. Color Temperature selection.

Audio Features Build in Audio Amplifier and Speakers, 9W x 2 channels. Volume/Bass/Treble/Balance controls. Mute. Multi-channel television sound.

Other Features Close caption. Sleep timer. Last channel recall. Side Input1: 1 CVBS, 1 R/L

Output1: Ear Phone Input/Output Terminals

Rear Input1: PC D-SUB: RGB D-SUB 15 pin, 1/8” stereo mini-jack Audio in.Input2: 1 x HDMI, 1 x R/L. Input3: 2 x Component Video (Y/Pb/Pr, Y/Cb/Cr HDTV ready), 1 x RL.Input4: 1 x S-Video, 1 x CVBS, 1 x audio in. RF1: 1 Tuner. Output1: 1 x R/L audio output. (firmware update via D-Sub port)

Remote Control Unit Infrared remote controller. Accessory/Cables Infrared remote controller and 2 batteries.

User Manual Quick start guide.

Warranty card. Plug & Play VESA® DDC 2B (VGA) User Controls and Indicators Control Buttons: 6 buttons for OSD control (Menu, Select, Up, Down, Left,

Right) Power control: 1 power ON/OFF button Power LED (Blue/Amber)

OSD Languages English, Spanish, Portuguese. AC Power Input Range 200~240VAC (Europe, China), 50/60Hz, 5A max. Power Consumption Normal operating < 150W

Power off < 2W at 220VAC (Europe) Agency Approvals Dimensions W: 678 H: 541 D: 186 (mm) Packing Weight:

Net: 12.4 Kg Gross: 15.4 Kg

Container loading: Air: 8 units/pallet Sea: 189units /20’, 405units/40’.

Environmental Conditions Operating Temperature : +0°C to 40°C Storage Temperature : -20°C to +60°C Operating Humidity : 10 to 90% (no condensation). Storage Humidity : 10 to 90% (no condensation). Operating Altitude : 3000M. Storage Altitude : 12000M.

2.2 32-inch General specification: Panel size / type: 32” Color TFT Active Matrix LCD, Hard coated (3H), anti-reflective coating.

CMO: V320B1-L01 (1366X768). Pixel dimension: 0.1730 x 3 mm(H) x 0.5190 mm(V). Native/optimum resolution: 1366X768. Aspect ratio: 16:9. Response time: 8ms. (typical). Contrast ratio: 1000:1 (typical). Maximum brightness: 550 nits (Center, typical). Viewing angles: (Contrast ratio ≥ 20)


Display colors: 16.7 million True Color (24-bit). Color saturation (NTSC) : 75%. Active display area (H x V): 708.954 mm (H) x 398.592 mm (V) (32.02”). PC compatible frequency: VESA Standard Timing: 1360x768, 1280x1024, 1024x768, 848x480,

800x600, 640x480,720x400; H: 30 ~ 80 KHz, V: 50 ~ 75Hz.

HDTV compatibility (Component): 480i, 480P, 720P, 1080i. (for Brazil PAL-M) Native/optimum resolution: 1366X768. Video Compatibility (CVBS, S-Video) PAL-M/PAL-N/NTSC. Tuner Compatibility PAL-M/PAL-N/NTSC. Video Features Faroudja IntelliComb technology.







User Manual Quick start guide. Warranty card.

Plug & Play VESA® DDC 2B (VGA)

User Controls and Indicators Control Buttons: 6 buttons for OSD control (Menu, Select, Up, Down, Left, Right) Power control: 1 power ON/OFF button Power LED (Blue/Amber)

OSD Languages English, Spanish, Portuguese. AC Power Input Range 200~264VAC (Europe, China), 50/60Hz, 5A max. Power Consumption Normal operating < 180W

Power off < 2W at 220VAC (Europe) Agency Approvals Dimensions W: 798 H: 622 D: 225 (mm) Packing Weight:

Net: 16 Kg Gross: 20 Kg

Container loading: Air: 8units/pallet Sea: 96units/20’, 208units/40’.


2.3 37-inch General specification: Panel size / type: 37” Color TFT Active Matrix LCD, Hard coated (3H), anti-reflective coating.

AUO: T370XW01 (1366X768). Pixel dimension: 0.6 mm(H) x 0.6 mm(W). Native/optimum resolution: 1366X768. Aspect ratio: 16:9. Response time: 8ms. (typical). Contrast ratio: 1000:1 (typical). Maximum brightness: 500 nits (Center, typical). Viewing angles: (Contrast ratio ≥ 20)


Display colors: 16.7 million True Color (24-bit). Color saturation (NTSC) : 75%. Active display area (H x V): 596.259 mm (H) x 335.232 mm (V) (27”). PC compatible frequency: VESA Standard Timing: 1360x768, 1280x1024, 1024x768, 848x480,

800x600, 640x480,720x400; H: 30 ~ 80 KHz, V: 50 ~ 75Hz.

HDTV compatibility (Component): 480i, 480P, 720P, 1080i. (for Brazil PAL-M) Native/optimum resolution: 1366X768. Video Compatibility (CVBS, S-Video) PAL-M/PAL-N/NTSC. Tuner Compatibility PAL-M/PAL-N/NTSC.. Video Features Faroudja IntelliComb technology.







User Manual Quick start guide. Warranty card.

Plug & Play VESA® DDC 2B (VGA)

User Controls and Indicators Control Buttons: 6 buttons for OSD control (Menu, Select, Up, Down, Left, Right) Power control: 1 power ON/OFF button Power LED (Blue/Amber)

OSD Languages English, French, Spanish, Italian, German, Danish, French, Russian, Greek, Turkish.

AC Power Input Range 200~264VAC (Europe, China), 50/60Hz, 5A max. Power Consumption Normal operating < 210W

Power off < 2W at 220VAC (Europe) Agency Approvals Dimensions W: 931.6 H: 711.5 D: 257.85 (mm) Packing Weight:

Net: 21.5 Kg Gross: 27.7 Kg

Container loading: Air: 6units/pallet Sea: 64units/20’, 140units/40’.


2.4. PCB Assembly test 1. Electrical Characteristics

1.1 Test Condition 1.1.1 30 Minutes Warm-Up 1.1.2 Viewing Distance：1.569m

1.2 Input Characteristics 1.2.1 Input voltage range. ：90Vac to 264Vac. 1.2.2 Input frequency range ：47Hz to 63Hz 1.2.3 Power board output voltage ：24V, 12V, 5VSB +/-5% 1.2.4 Input current ：5A max. 1.2.5 Inrush current ：60A Max @110Vac, 120A Max @240Vac

2. Environment

2.1 Operating Temperature ：0 to 40 degree C 2.2 Operating Relative Humidity ：10 to 90% (Ta<35 degree c) 2.3 Storage Temperature ：Air temperature -20 to +60 degree C. (H.M < 35%) 2.4 Storage Relative Humidity ：10% to 90%, (Ta<40 degree C) 2.5 Operating Altitude ：0 meters to +3000 meters 2.6 Storage Altitude ：0 meters to +12,000 meters

3. Test Fixture & Equipment

3.1 Video Generator ：CHROMA & VCD/DVD/VCR/GAME/DVHS PLAYER 3.2 Pattern Generator ：CHROMA2225/VG828/VG848

4. Component 1&2, AV 1&2, S-Video, TV Function & Function key test 4.1 YPbPr & Composite AV port Toggle test

4.1.1 Connect Ypbpr video signal to Component port, and composite video to AV port, , then use OSD sources select to switch, and image should be displayed.

4.2 RF Signal test

4.2.1 NTSC Cable test. (Standard cable 125 Channel). 4.2.2 NTSC Air test. (Antenna 69 Channel). 4.2.3 Connected RF cable, the picture should be display.

5. Audio Test 5.1 Test condition

Base input audio waveform：Sine wave 0.5Vr.m.s (1.414Vp-p) @ 1KHz. Video setting：Purity white at 640 x 480@60Hz. Contrast and Brightness：default Balance, Bass and Treble = Default

5.2 Connected PC audio, composite and component L/R input, the speaker should be output. 5.3 Speaker specification

Line input connection RCA Jack (L/R) * 2 Line input signal 0.5Vr.m.s (1.414Vp-p) Line input impedance 10KΩ

Maximum Power Output (Electric) 9W RMS x 2 @ 10% THD at Freq. = 200Hz~15KHz Frequency Response 200Hz – 15KHz into 8Ω Load

Distortion < 10% THD

2.5. Instrument Test 1. Luminance test..

Select HDMI 1360x768 @ 60Hz input: (Brightness: 50%, Contrast: 50%) 1.1 White balance.

a. Color1: x = 0.314 ± 0.04. y = 0.314 ± 0.04.

b. Color2: x = 0.289 ± 0.04. y = 0.289 ± 0.04.

c. Color3: x = 0.270 ± 0.04. y = 0.270 ± 0.04.

1.2 In HDMI mode 1360x768 @ 60Hz with Contrast 50%, Brightness 50% and the 32grays need clear;

1.3 Select HDMI mode and color3, full white pattern, then adjust contrast to 100%, brightness 100%,

the luminance ≥ 450nits.(LT27HGN,LT32FGN), ≥ 400nits.(LT37FGN).

1.4 Contrast ratio: a. The contrast ratio can be calculated by the following expression: b. Contrast ratio = MAX. Luminance (Luminance of gray level 255, Brightness 100%, Contrast 100%)

MIN. Luminance (Luminance of gray level 0, Brightness 0%, Contrast 0%) c. Contrast ratio ≧ 1000: 1.

1.5 Brightness uniformity: (Refer to FIG.17)

BU = Maximum (L1, L2, L3, L4, L5)

1.3 MaxMinimum (L1, L2, L3, L4, L5)

D/4 D/2 3D/4

W/4

W/2

3W/4

1 2

3 4

5

Active area

H lineD

WV line

FIG.17

2.6 Picture performance test.

2.1 Video performance test: Apply pattern: Color bars (COL_SMPTE), Crosshatch, Multi burst, Black & White, Gray scale.

Color bars (COL_SMPTE). Multi burst. Black & White.

2.1.1 Connected video signal source to Component, AV and S-Video port:

2.1.1.1 In color bar (COL_SMPTE) pattern, a. The color from left side to right side should be White, Yellow, Sky Blue, Green, Magenta,

Red and Blue. b. The low light 10.7 IRE in the right bottom side should be separate clear. c. Used the Blue color filter to check the Hue and Saturation were in the optimize point.

(Saturation: The Blue and White color should be the same when see through by Blue color filter.)

(Hue: The Magenta and Sky Blue color should be the same when see through by Blue color filter.)

d. The color transition (between Green and Magenta) black line 7mm.≦ 2.1.1.2 In Crosshatch pattern, it should be no visible noise. 2.1.1.3 In Multi burst pattern:

a. In low bandwidth pattern, there are no any dots on the edge transitions. b. In high bandwidth pattern, cannot loss any resolution and the scaling should be correct. c. There is no visible noise in this pattern.

2.1.1.4 In Black & White, there is no any trouble at edge transition. 2.1.1.5 In Gray Scale pattern, the gray scale should not be saturation at default value.

2.1.2 Connected video signal source to TV (Composite Video) port:

2.1.2.1 Test Channel: Choice each bands a channel to test.

TV Band Frequency (MHz) Sensitivity

Low band 55.25 ~ 160.00 85dB ~ 55dB.

Mid band 160.00 ~ 442.00 85dB ~ 55dB.

High band 442.00 ~ 801.25 85dB ~ 55dB.

FIG.18

2.1.2.2 In color bar (COL_SMPTE) pattern,

a. The color from left side to right side should be White, Yellow, Sky Blue, Green, Magenta, Red and Blue.

b. The low light 10.7 IRE in the right bottom side should be separate clear. c. Used the Blue color filter to check the Hue and Saturation were in the optimize point.

(Saturation: the Blue and White color should be the same when see through by Blue color filter.)

(Hue: the Magenta and Sky Blue color should be the same when see through by Blue color filter.)

d. The color transition (between Green and Magenta) black line 7mm.≦ 2.1.2.3 In Crosshatch pattern, it should be no visible noise. 2.1.2.4 In Multi burst pattern:

a. In low bandwidth pattern, there are no any dots on the edge transitions. b. In high bandwidth pattern, can not loss any resolution and the scaling should be correct. c. There is no visible noise in this pattern.

2.1.2.5 In Black & White, there is no any trouble at edge transition. 2.1.2.6 In Gray Scale pattern, the gray scale should not be saturation at default value. 2.1.2.7 Apply cable TV or RF pattern generator signal and the RF sensitivity set to 45 ~85dBµV, the

image should be displayed. If under 60dBµV, the image had snow noise was acceptable but can not loss any color.

2.1.2.8 TV Channel Auto Scan a. The system TV channel and frequency table as Appendix A TV channel and PC preset

timing. 2.1.4.9 Close caption function test:

a. Select the “Close Caption” (In main picture OSD) to CC1, CC2, CC3, CC4, TT1, TT2, TT3, TT4.

b. Setting the FLUKE 54200 or VG848 / 858 function to CC number 1, CC number 2, CC number 3, CC number 4, CC number 5, CC number 6, CC number 7, CC number 8, the function should be normally.

2.7. Factory preset.

2.7.1 Factory reset: After test, each set need to do “FACTORY RESET” to keep all sets status are same.

2.7.2 Factory setting (With remote control):

2.7.2.1 In OSD, use remote control select “GENERAL SETTING” “FACTORY RESET”, then input “2005”, the OSD will into factory mode.

2.7.2.2 In factory mode, the remote control hot keys define: Remote control digit Hot key 1 Alignment on. 2 Alignment off. 3 UART on. 4 UART off. 5 Burn in on. 6 Burn in off.

2.7.2.3 ISP: Before ISP (Download G-Probe), the factory mode must be setting “UART ON”.

2.7.2.4 All factories reset: After finish production line test, into factory mode select “SYSTEM” ”Factory reset” to reset the factory setting.

2.8. Power Supply tests.

2.8.1 Power consumption test table: TV status LED color Picture Power consumption

Power on (Normal operation) Blue Active <150W (for 27 inch) <180W (for 32 inch) <210W (for 37 inch)

Aging Blue NA <150W (for 27 inch) <180W (for 32 inch) <210W (for 37 inch)

DC power off (stand by) Orange NA <2W at 240VAC. <1W at 110VAC.

2.8.2 Dielectric withstands voltage:

4.2.1 Primary to secondary: 2545VDC for 1 sec. 4.2.2 Leakage current 10mA.≦

2.9. DDC test.

2.9.1 DDC / EDID specification compliance requirement. The data that is communicated shall be stored in the monitor in non-volatile, which is a subset of the VESA EDID version 3.0 standard.

2.9.2 The EDID data see Appendix B: DDC contents. 2.10. Audio test:

2.10.1 Connected VGA audio input source to VGA audio input, the speaker L and R should be output and the distortion (THD) 10% at 200Hz to 15KHz≦ , and the audio function of Balance, Bass, and Treble should be working normally.

2.10.2 Connected AV audio input source to AV L/R audio input, the speaker L and R should be output and the distortion (THD) 10% at 200Hz to 15KHz≦ , and the audio function of Balance, Bass, Treble should be working normally.

2.10.3 Connected Component audio input source to Component L/R audio input, the speaker L and R should be output and the distortion (THD) 10% at 200Hz to 15KHz≦ , and the audio function of Balance, Bass, Treble should be working normally.

2.10.4 Audio output test: When each audio had input, then audio output RCA jack (L/R), must output 0.5Vrms (1.414Vp-p).

2.11. TV Channel Table.

Picture Carrier Frequency (MHz) CABLE Channel

Number AIR STD HRC IRC

2 55.25 55.25 54.00 55.25 3 61.25 61.25 60.00 61.25 4 67.25 67.25 66.00 67.25 5 77.25 77.25 78.00 79.25 6 83.25 83.25 84.00 85.25 7 175.25 175.25 174.00 175.25 8 181.25 181.25 180.00 181.25 9 187.25 187.25 186.00 187.25

10 193.25 193.25 192.00 193.25 11 199.25 199.25 198.00 199.25 12 205.25 205.25 204.00 205.25 13 211.25 211.25 210.00 211.25 14 471.25 121.25 120.00 121.25 15 477.25 127.25 126.00 127.25 16 483.25 133.25 132.00 133.25 17 489.25 139.25 138.00 139.25 18 495.25 145.25 144.00 145.25 19 501.25 151.25 150.00 151.25 20 507.25 157.25 156.00 157.25 21 513.25 163.25 162.00 163.25 22 519.25 169.25 168.00 169.25 23 525.25 217.25 216.00 217.25 24 531.25 223.25 222.00 223.25 25 537.25 229.25 228.00 229.25 26 543.25 235.25 234.00 235.25 27 549.25 241.25 240.00 241.25 28 555.25 247.25 246.00 247.25 29 561.25 253.25 252.00 253.25 30 567.25 259.25 258.00 259.25 31 573.25 265.25 264.00 265.25 32 579.25 271.25 270.00 271.25 33 585.25 277.25 276.00 277.25 34 591.25 283.25 282.00 283.25 35 597.25 289.25 288.00 289.25 36 603.25 295.25 294.00 295.25 37 609.25 301.25 300.00 301.25 38 615.25 307.25 306.00 307.25 39 621.25 313.25 312.00 313.25 40 627.25 319.25 318.00 319.25 41 633.25 325.25 324.00 325.25 42 639.25 331.25 330.00 331.25 43 645.25 337.25 336.00 337.25 44 651.25 343.25 342.00 343.25 45 657.25 349.25 348.00 349.25 46 663.25 355.25 354.00 355.25 47 669.25 361.25 360.00 361.25 48 675.25 367.25 366.00 367.25 49 681.25 373.25 372.00 373.25 50 687.25 379.25 378.00 379.25 51 693.25 385.25 384.00 385.25 52 699.25 391.25 390.00 391.25 53 705.25 397.25 396.00 397.25 54 711.25 403.25 402.00 403.25 55 717.25 409.25 408.00 409.25 56 723.25 415.25 414.00 415.25 57 729.25 421.25 420.00 421.25 58 735.25 427.25 426.00 427.25 59 741.25 433.25 432.00 433.25 60 747.25 439.25 438.00 439.25 61 753.25 445.25 444.00 445.25

62 759.25 451.25 450.00 451.25 63 765.25 457.25 456.00 457.25 64 771.25 463.25 462.00 463.25 65 777.25 469.25 468.00 469.25 66 783.25 475.25 474.00 475.25 67 789.25 481.25 480.00 481.25 68 795.25 487.25 486.00 487.25 69 801.25 493.25 492.00 493.25 70 499.25 498.00 499.25 71 505.25 504.00 505.25 72 511.25 510.00 511.25 73 517.25 516.00 517.25 74 523.25 522.00 523.25 75 529.25 528.00 529.25 76 535.25 534.00 535.25 77 541.25 540.00 541.25 78 547.25 546.00 547.25 79 553.25 552.00 553.25 80 559.25 558.00 559.25 81 565.25 564.00 565.25 82 571.25 570.00 571.25 83 577.25 576.00 577.25 84 583.25 582.00 583.25 85 589.25 588.00 589.25 86 595.25 594.00 595.25 87 601.25 600.00 601.25 88 607.25 606.00 607.25 89 613.25 612.00 613.25 90 619.25 618.00 619.25 91 625.25 624.00 625.25 92 631.25 630.00 631.25 93 637.25 636.00 637.25 94 643.25 642.00 643.25 95 91.25 90.00 91.25 96 97.25 96.00 97.25 97 103.25 102.00 103.25 98 109.25 108.00 109.25 99 115.25 114.00 115.25

100 649.25 648.00 649.25 101 655.25 654.00 655.25 102 661.25 660.00 661.25 103 667.25 666.00 667.25 104 673.25 672.00 673.25 105 679.25 678.00 679.25 106 685.25 684.00 685.25 107 691.25 690.00 691.25 108 697.25 696.00 697.25 109 703.25 702.00 703.25 110 709.25 708.00 709.25 111 715.25 714.00 715.25 112 721.25 720.00 721.25 113 727.25 726.00 727.25 114 733.25 732.00 733.25 115 739.25 738.00 739.25 116 745.25 744.00 745.25 117 751.25 750.00 751.25 118 757.25 756.00 757.25 119 763.25 762.00 763.25 120 769.25 768.00 769.25 121 775.25 774.00 775.25 122 781.25 780.00 781.25 123 787.25 786.00 787.25 124 793.25 792.00 793.25 125 799.25 798.00 799.25

2.12 Preset Timing Chart & Reference Timing Table

a. RF Video input: Analog video input Demodulated video input

Signal format Freq. (MHz) Channels Signal format Horizontal Freq. (KHz) Vertical Freq. (Hz) RF modulate system M

55.25 ~ 801.25 2~69(antenna) 2~125(cable)

4:3 and &16:9 Composite NTSC

15.734 59.940

PAL Basic Parameters PAL N PAL M NTSC

line/field 625/50 525/60 525/60 horizontal frequency 15.625 kHz 15.734 kHz 15.734 kHz

vertical frequency 50 Hz 60 Hz 60 Hz

color sub carrier freq 3.582056 MHz. 3.575611 MHz. 3.58 MHz. video bandwidth 4.2 MHz. 4.2 MHz. 4.2 MHz. audio carrier 4.5 MHz. 4.5 MHz. 4.5 MHz.

2.13 PC analog and HDMI timing:

Mode No. 1 2 3 4 5 6 7 8 9 10

Mode Name VESA 640 x 480

MAC 640 x 480

VESA640 x480

VESA640 x480

TEXT720 x400

VESA800 x600

VESA800 x600

VESA 800 x 600

VESA800 x600

MAC832 x624

Horizontal Freq. 31.469 35.000 37.861 37.500 31.469 35.156 37.879 48.077 46.875 49.727Video clock Freq. 25.175 30.240 31.500 31.500 28.322 36.000 40.000 50.000 49.500 57.285Sync. Polarity －－－－－＋＋＋＋－ H. total (Dots) 800 864 832 840 900 1024 1056 1040 1056 1152H. sync. (Dots) 96 64 40 64 108 72 128 120 80 64

H. back porch (Dots) 48 96 128 120 54 128 88 64 160 224

H. active (Dots) 640 640 640 640 720 800 800 800 800 832 H. front porch (Dots) 16 64 24 16 18 24 40 56 16 32

Vertical Freq. (Hz) 59.940 66.667 72.809 75.000 70.087 56.250 60.317 72.188 75.000 74.553Sync. Polarity －－－－＋＋＋＋＋－ V. total (Lines) 525 525 520 500 449 625 628 666 625 667 V. sync. (Lines) 2 3 3 3 2 2 4 6 3 3 V. back porch (Lines) 33 39 28 16 35 22 23 23 21 37

V. active (Lines) 480 480 480 480 400 600 600 600 600 624

V. front porch (Lines) 10 3 9 1 12 1 1 37 1 3

Mode No. 11 12 13 14 15 16 17 18 19 20

Mode Name VESA 848 x 480

VESA 1024 x

768

VESA1024 x

768

VESA1280 x1024

VESA1280 x1024

VESA1360 x

768

Horizontal Freq.(KHz) 31.020 56.476 60.023 63.981 79.976 47.712 Video clock Freq. 33.75 75.000 78.750 108.00 135.00 85.5 Sync. Polarity + －＋＋＋＋ H. total (Dots) 1088 1328 1312 1688 1688 1792 H. sync. (Dots) 112 136 96 112 144 112

H. back porch (Dots) 112 144 176 248 248 256

H. active (Dots) 848 1024 1024 1280 1280 1360 H. front porch (Dots) 16 24 16 48 16 64

Vertical Freq. (Hz) 60.000 70.069 75.029 60.020 75.025 60.015 Sync. Polarity ＋－＋＋＋＋ V. total (Lines) 517 806 800 1066 1066 795 V. sync. (Lines) 8 6 3 3 3 6 V. back porch (Lines) 23 29 28 38 38 18

V. active (Lines) 480 768 768 1024 1024 768

V. front porch (Lines) 6 3 1 1 1 3

2.14. DDC Contents a. Analog 128 bytes of EDID code. ( For LT27HGN 50AAP )

0 1 2 3 4 5 6 7 8 9 A B C D E F 0 00 FF FF FF FF FF FF 00 1E 41 03 27 01 01 01 0110 01 10 01 03 08 3C 22 78 2A 3B 90 A7 54 46 98 2420 10 49 4B BF EE 80 81 C0 01 01 01 01 01 01 01 0130 01 01 01 01 01 01 66 21 50 B0 51 00 1B 30 40 7040 36 00 54 4F 21 00 00 1E 00 00 00 FE 00 47 72 6150 64 69 65 6E 74 65 0A 20 20 20 00 00 00 FD 00 3260 4B 1E 50 0E 00 0A 20 20 20 20 20 20 00 00 00 FC70 00 4C 43 44 20 32 37 33 30 0A 20 20 20 20 01 D6

b. HDMI 256 bytes of EDID code. ( For LT27HGN 50AAP )

EDID block0: Rev:00 0 1 2 3 4 5 6 7 8 9 A B C D E F

0 00 FF FF FF FF FF FF 00 1E 41 03 27 01 01 01 0110 01 10 01 03 80 3C 22 78 2A 3B 30 A7 54 46 98 2420 10 49 4B 20 00 00 01 01 01 01 01 01 01 01 01 0130 01 01 01 01 01 01 66 21 50 B0 51 00 1B 30 40 7040 36 00 54 4F 21 00 00 00 00 00 00 FE 00 47 72 6150 64 69 65 6E 74 65 0A 20 20 20 00 00 00 FD 00 3260 4B 1E 50 0E 00 0A 20 20 20 20 20 20 00 00 00 FC70 00 4C 43 44 20 32 37 33 30 0A 20 20 20 20 01 D6EDID block1: Rev:00 0 1 2 3 4 5 6 7 8 9 A B C D E F 0 02 03 1A 71 47 84 05 02 03 01 06 07 23 09 1F 0710 83 01 00 00 65 03 0C 00 10 00 01 1D 00 72 51 D020 1E 20 6E 28 55 00 A2 08 32 00 00 1E 00 1D 80 1830 71 1C 16 20 58 2C 25 00 A2 08 32 00 00 9E 8C 0A40 D0 8A 20 E0 2D 10 10 3E 96 00 A2 08 32 00 00 1850 8C 0A D0 8A 20 E0 2D 10 10 3E 96 00 A2 08 32 0060 00 18 00 00 00 00 00 00 00 00 00 00 00 00 00 0070 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 BA

c. Analog 128 bytes of EDID code. (For LT32FGN 50AAP)

0 1 2 3 4 5 6 7 8 9 A B C D E F 0 00 FF FF FF FF FF FF 00 1E 41 03 32 01 01 01 0110 01 10 01 03 08 47 28 78 2A 03 20 A7 55 45 96 2420 11 49 4B BF EE 80 81 C0 01 01 01 01 01 01 01 0130 01 01 01 01 01 01 66 21 50 B0 51 00 1B 30 40 7040 36 00 C5 8F 21 00 00 1E 00 00 00 FE 00 47 72 6150 64 69 65 6E 74 65 0A 20 20 20 00 00 00 FD 00 3260 4B 1E 50 0E 00 0A 20 20 20 20 20 20 00 00 00 FC70 00 4C 43 44 20 33 32 33 30 0A 20 20 20 20 00 69

d. HDMI 256 bytes of EDID code. (For LT32FGN 50AAP)

EDID block0: Rev:00 0 1 2 3 4 5 6 7 8 9 A B C D E F 0 00 FF FF FF FF FF FF 00 1E 41 03 32 01 01 01 0110 01 10 01 03 80 47 28 78 2A 33 34 A7 54 46 96 2420 10 49 4B 20 00 00 01 01 01 01 01 01 01 01 01 0130 01 01 01 01 01 01 66 21 50 B0 51 00 1B 30 40 7040 36 00 54 4F 21 00 00 00 00 00 00 FE 00 47 72 6150 64 69 65 6E 74 65 0A 20 20 20 00 00 00 FD 00 3260 4B 1E 50 0E 00 0A 20 20 20 20 20 20 00 00 00 FC70 00 4C 43 44 20 33 32 33 30 0A 20 20 20 20 01 C8EDID block1: Rev:00 0 1 2 3 4 5 6 7 8 9 A B C D E F 0 02 03 1A 71 47 84 05 02 03 01 06 07 23 09 1F 0710 83 01 00 00 65 03 0C 00 10 00 01 1D 00 72 51 D020 1E 20 6E 28 55 00 A2 08 32 00 00 1E 01 1D 80 1830 71 1C 16 20 58 2C 25 00 A2 08 32 00 00 9E 8C 0A40 D0 8A 20 E0 2D 10 10 3E 96 00 A2 08 32 00 00 1850 8C 0A D0 8A 20 E0 2D 10 10 3E 96 00 A2 08 32 0060 00 18 00 00 00 00 00 00 00 00 00 00 00 00 00 0070 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 B9

e. Analog 128 bytes of EDID code. ( For LT37FGN 50AAP )

0 1 2 3 4 5 6 7 8 9 A B C D E F 0 00 FF FF FF FF FF FF 00 1E 41 03 37 01 01 01 0110 01 10 01 03 08 52 2E 78 2A E6 9D A3 54 4A 99 2620 0F 47 4A BF EE 80 81 C0 01 01 01 01 01 01 01 0130 01 01 01 01 01 01 66 21 50 B0 51 00 1B 30 40 7040 36 00 34 CD 31 00 00 1E 00 00 00 FE 00 47 72 6150 64 69 65 6E 74 65 0A 20 20 20 00 00 00 FD 00 3260 4B 1E 50 0E 00 0A 20 20 20 20 20 20 00 00 00 FC70 00 4C 43 44 20 33 37 33 30 0A 20 20 20 20 00 31

f. HDMI 256 bytes of EDID code. ( For LT37FGN 50AAP )

EDID block0: Rev:00 0 1 2 3 4 5 6 7 8 9 A B C D E F 0 00 FF FF FF FF FF FF 00 1E 41 03 37 01 01 01 0110 01 10 01 03 80 52 2E 78 2A 32 31 A3 54 4A 99 2620 0F 47 4A 20 00 00 01 01 01 01 01 01 01 01 01 0130 01 01 01 01 01 01 66 21 50 B0 51 00 1B 30 40 7040 36 00 54 4F 21 00 00 00 00 00 00 FE 00 47 72 6150 64 69 65 6E 74 65 0A 20 20 20 00 00 00 FD 00 3260 4B 1E 50 0E 00 0A 20 20 20 20 20 20 00 00 00 FC70 00 4C 43 44 20 33 37 33 30 0A 20 20 20 20 01 B0EDID block1: Rev:00 0 1 2 3 4 5 6 7 8 9 A B C D E F 0 02 03 1A 71 47 84 05 02 03 01 06 07 23 09 1F 0710 83 01 00 00 65 03 0C 00 10 00 01 1D 00 72 51 D020 1E 20 6E 28 55 00 A2 08 32 00 00 1E 01 1D 80 1830 71 1C 16 20 58 2C 25 00 A2 08 32 00 00 9E 8C 0A40 D0 8A 20 E0 2D 10 10 3E 96 00 A2 08 32 00 00 1850 8C 0A D0 8A 20 E0 2D 10 10 3E 96 00 A2 08 32 0060 00 18 00 00 00 00 00 00 00 00 00 00 00 00 00 0070 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 B9

2.15. HDMI-HDCP test

1. Create HDCP key: The “*.dat＂ files need buy from“Digital Content Protection LLC＂

(WWW.digital-cp.com) To execute this program to create “*.HEX＂.

2. Install HDCP key to TV. a. To execute GProbe 4.exe b. Select Commends to DebugON then press Enter c. Select Commands to SetBuffer address= 0X600 length=300 then press

Enter d. Select Commands to NVRAMWrite then input the file of factoryxxx.hex (HDCP

keys) from address=0 e. Set Commands to NVRAMRead address=0 length=300

3. With “VG848 or VG858” HDCP program to check the TV set HDCP function.

3. Front Panel Function Control Description 3.1 User control

The front of the display shall provide user access to basic functionality and OSD functionality. The front user controls shall follow the format shown below:

Rear View of the LCD TV

27 inch LCD TV 32 inch LCD TV 37 inch LCD TV

Side View of the LCD TV

A/B. AV2 Audio Input (Left / Right) Connect an external audio source to these jacks (Audio (R/L)).

C. AV2 Video Input Connect an external video device such as a VCR, DVD or video game system.

D. Headphone Jack.

1. Menu Turn OSD Menu ON/OFF

2. Volume + / -Adjust (VOL + / -) sound volume or adjust a highlighted control while in the OSD Menu.

3. Channel + / -Adjust (CH + / -) channel when input is TV or adjust a highlight control while in the OSD Menu.

4. Input Select Active Video Input or choose a selection (ENTER) while in the OSD MENU.

5. Power Button Power ON/OFF

Back view of the LCD TV

1. VGA Video Input Connect to the Audio out (Green) from a computer

2. VGA Using a 15-pin VGA cable, connect to a computer or other device with a VGA output.

3. YPbPr1 Input Connect an external video device with component output to these jacks.

4. YpbPr2 Input Connect an external video device with component output to these jacks.

5. YPbPr1 Audio Input (Right / Left) Connect the an external audio source to this jack; (Audio R/L).

6. YPbPr2 Audio Input (Right / Left) Connect the an external audio source to this jack; (Audio R/L).

7. HDMI-HDCP HDMI port can connect the HDMI to HDMI cable or HDMI to DVI cable. If using HDMI to DVI cable connect TV and device. Audio cable should be used.

8. HDMI Audio Input (Right / Left) Connect an external audio to this jack.

9. ANT. (RF-input) Connect the LCD TV to an antenna or cable service.

10. S-Video Input Connect to an external video device such as a digital cable/ satellite receiver, VCR, DVD or video game system.

11. AV Video Input (AV1) Connect the composite video to an external video device such as VCR, DVD and video game system.

12. AV & S-Video Audio Input (Right / Left) Connect an external audio source to this jack; (Audio (R/L).This connection supports either S-Video or AV input.

13. Audio Output (Right / Left) Connect this output to an external audio receiver.

14. AC IN (Power) Connect the power cord from AC IN to a power source.

27

3.2 OSD Functions

IMAGE SETTING For other input source

For other input source mode: VGA

Original image

1.SCHEME ♦ Use ▲▼ to select different video mode "USER", "VIVID", "STD", "CINEMA", then press "ENTER" key to enter the item that you select. ♦ Use "EXIT" to exit this function.

2. BRIGHTNESS ♦ Only the scheme is setting “USER” mode, this

function will turn on. ♦Adjust the brightness of the screen image ◄ Reduce brightness ► Increase brightness

3. CONTRAST ♦ Only the scheme is setting “USER” mode, this

function will turn on. ♦ Adjust the contrast of the screen image ◄ Reduce contrast ► Increase contrast

4. SATURATION ♦ Only the scheme is setting “USER” mode, this

function will turn on. ♦ Adjust the tone of the screen image ◄ Increase red tone ► Increase green tone

28

5. TINT ♦ Only the scheme is setting “USER” mode, this

function will turn on. ♦ Adjust the tone of the screen image ◄ Reduce red tone ► Increase green tone

6. SHARPNESS ♦ Only the scheme is setting “USER” mode, this

function will turn on. ♦ Adjust the sharpness of the screen image ◄ Reduce sharpness ► Increase sharpness

7. COLOR TEMPERATURE ♦ Only the scheme is setting “USER” mode, this

function will turn on. ♦ Use ▲▼ to select color temperature "Color 1",

"Color 2", "Color 3", then press "ENTER" key to enter the item that you select.

♦ Use "EXIT" to exit this function.

8. RESET ♦ Use ▲▼ to select NO or YES.

♦ YES Mean call the facture default setting for Image Setting.

♦ NO Keep your picture adjust setting.

9. VGA SETTING

9-1. AUTO ♦ Use ▲▼ to select NO or YES

Press ENTER to auto get the input signal again.

29

9-2.CLOCK ♦ Use◄ ►to change the clock value ♦ Adjusting the image interference. When the

screen shows interference caused by disturbing wave, please adjust the clock.

◄ Reduce red tone ► Increase green tone

9-3. PHASE ♦ Adjusting Phase distortion of image in PC mode.

When the screen shows flashing, ghost image or undulation, please adjust the phase.

◄ Reduce red tone ► Increase green tone

9-4. POSITION

9-4-1. H POSITION ♦ Use ◄ ► to change image Horizontal position.

9-4-2. V POSITION ♦ Use ▲▼ to change image Vertical position.

30

DISPLAY SETTING

1.MAIN SOURCE Press ENTER first, then use 　　 to change the Main picture input source signal. Such as TV AV1 AV2 S-VEDIO COMPONENT1

COMPONENT2 VGA HDMI

2.PIP SOURCE Press ENTER first, then use 　　 to change the SUB picture input source signal.

3.ASPECT RATIO =remote control key "ASPECT" Use ▲▼ to select items. 3-1 ♦ STANDARD Suitable for viewing conventional 4:3 programs in their normal format.

3-2 ♦ FILL Suitable for stretching 4:3 programs to fill the screen

3-3 ♦ 14:9 Displays 14:9 in the proportions. As a result, black border areas are visible on the screen.

3-4 ♦ SMOOTH Displays conventional 4:3 broadcasts with an imitation wide screen effect. The 4:3 picture is stretched to fill the screen.

3-5 ♦ ZOOM Suitable for viewing wide-screen 2.35:1 monographic DVD in full screen.

Change main picture’s input signal source

Change usb-picture’s input signal source

31

4.PIP MODE =remote control key "PIP" and "POP" Use 　　 to select OFF, PIP, POP, PBP ♦ OFF Only display main picture, not display sub-picture.

♦ PIP Display the sub-picture on the screen.

♦ PBP The screen is divided in half.

♦ POP The screen is in the 16:9 mode and divided in half.

5.SWAP =remote control key "SWAP" Main picture and sub picture swap.

Original After Swap

6.PIP SIZE (SMALL, MEDIUM, LARGE) Use 　　 to change sub-picture size

7.PIP POSITION Use 　　 to adjust sub-picture horizontal position.

8.AUDIO FROM : Select audio from main picture or sub picture.

PIP/POP source define SUB

Main TV S-Video AV1 AV2 Component1 Component2 D-SUB HDMI

TV X X X X X X X O S-Video X X X X X X X O AV1 X X X X X X X O AV2 X X X X X X X O Component1 X X X X X X X O Component2 X X X X X X X O D-SUB X X X X X X X O HDMI O O O O O O O X

Sub-Picture

Main-Picture

Main-Picture Sub-Picture

Main-Picture Sub-Picture

32

AUDIO SETTING

1.BASS ♦ Use ◄► to adjust the ratio of Bass.

2.TREBLE ♦ Use ◄► to adjust the high-pitched sound.

3.BALANCE ♦ Use ◄► to adjust the balance level between left and right speakers.

4.MTS =remote control key “MTS” ♦ Use 　　 to select TV audio STEREO SAP

MONO.

5.MUTE =remote control key “MUTE” ♦ Use 　　 to select audio ON or OFF

33

6.SPEAKER ♦ Use 　　 to select ” INTERNAL” or “EXTERNAL”.

7.RESET ♦ Use 　　 to select NO or YES ♦ YES Mean call the factory default setting for

audio setting. ♦ NO Keep your audio adjust setting.

34

TV SETTING

1. TV SYSTEM ♦ Use ENTER key to enter "TV SYSTEM" function. ♦ Use 　　 to select “CABLE” or “ANTENNA”,

then press ENTER key to enter the item that you select.

2. AUTO SCAN ♦ Use ENTER key to enter "AUTO SCAN" function. ♦ Use 　　 to select “NO” or “YES”, then press

ENTER key to enter the item that you select. ♦ YES Start to scan channel. ♦ NO Keep original channel table..

3. CHANNEL EDIT ♦ Use ENTER key to enter "CHANNEL EDIT"

function. ♦ Use 　　 to select “ADDED” or “SKIPPED”,

then press ENTER key to enter the item that you select.

♦ Use EXIT key to exit this function.

35

GENERAL SETTING

1. TRANSPARENCY ♦ Use ENTER key to enter "TRANSPARENCY"

adjustment function. ♦ Use ◄► to change OSD menu transparency. ♦ Use "EXIT" key to exit this function.

2. BARCKLIGHT ♦ Use ENTER key to enter "BACKLIGHT"

adjustment function. ♦ Use ◄► to change panel backlight ♦ Use "EXIT" key to exit this function.

3. MENU POSITION ♦ Use ENTER key to enter "MENU POSITION"

sub-menu. ♦ Use ◄► to change OSD menu H position. ♦ Use ▲▼ to change OSD menu V position. ♦ Use "EXIT" key to exit this function.

4. SYSTEM INFO ♦ Display some information about this TV set, may

also be displayed by pressing the hotkey on the remote control.

♦ Use ENTER key to enter "SYSTEM INFO" sub-menu.

SOURCE: Display the input signal of current main picture.

RESOLUTION: Display the main picture input signal resolution.

H.FREQUENCY: Display the main picture input signal H. Frequency.

V.FREQUENCY: Display the main picture input signal V. Frequency.

VERSION: Display TV software version. ♦ Use “EXIT” key to exit this function.

36

5. CLOSED CAPTION ♦ Use ENTER key to enter "CLOSED CAPTION"

sub-menu. ♦ Use▲▼ to select closed caption “OFF” / “CC1”

/ “CC2” /“CC3” /“CC4” / “TEXT1” / “TEXT2” / “TEXT3” / “TEXT4”, then press ENTER key to enter the item that you select.

6. LANGUAGE ♦ Set OSD display language, there are three

language options: PORTUGUES ENGLISH ESPAÑOL

7. SLEEP TIMER =remote control key "SLEEP" ♦ Set up the time to turn off the display, works the

same as the hotkey SLEEP on the remote control. The sleep timer will be reset to zero every time when the display restarts. If it is set to 30 minutes, this means in 30 minutes from the timer is set, the display will be turned off automatically. If the timer is set to OFF, the function will be disabled. There are four item can to select "OFF" / "30 MIN" / "60 MIN" / "120 MIN".

8. MENU TIMEOUT ♦ Use▲▼to set up OSD display time, the value

range is "10 SEC" / "30 SEC" / "60 SEC" If the OSD TIMEOUT is set to 30 seconds, OSD screen will automatically disappear in 30 seconds if not any key is pressed.

37

9.FACTORY RESET ♦ Select YES to return all OSD settings to the defult

values, Select NO to stay unchanged.

OSD MESSAGE 1.AUTO SCAN REQUIRED

Need to search TV channel message.

2.MTS

Display TV audio system message.

3.CLOSED CAPTION

Display CC system message.

4.NO SIGNAL

Display the main picture no signal input message.

5.SLEEP TIMER

Display sleep timer message.

6.NO FUNCTION

The AUDIO, AV MODE, SCART, GUIDE keys in this model no function, when user push these keys, the display will show “ NO FUNCTION”.

38

4. Circuit Description 4.1 Interface Board

4.1.1 Power Supply (DC/DC Converter) 甲、 24V, 12V, 5VSB id from Power Board. 乙、 3V3CTZ from regulator IC2007 (5VSB->3.3V) 丙、 2V5DDR from regulator IC2003 (5VSB->2.5V) 丁、 1V8CTZ from regulator IC2004 (5VSB->1.8V) 戊、 5VT from regulator IC2001 (12V->5V) 己、 5VA from DC-DC IC2002 (12V ->5V) 庚、 3V3A/ 3V3HDMI from regulator IC2005 (5VA->3.3V) 辛、 1V8HDMI from regulator IC2004 (5VA->1.8V)

4.1.2 Image Processor

The Genesis Microchip FLI8532 (IC401) is a fully integrated single chip solution for LCD TV. It includes an

integrated 3-D Digital Video Decoder with Faroudja DCDi Cinema video format conversion, video enhancement, and

noise reduction. The level of video quality that could previously only be seen on an exclusive Faroudja Home Theater

System is now available in a single chip solution.

The auto-detection and Faroudja DCDi Cinema technology allow the FLI8532 to detect, process, and enhance

any video or PC graphic format worldwide without the need for additional hardware.

The integrated VBI dataslicer and decoder allow for significant cost reduction by removing the need for

expensive, external VBI dataslicers and decoders. The FLI8532 supports many worldwide VBI standards for

applications of Teletext, Closed Captioning, V-Chip, and other VBI technologies.

An embedded micro-controller and a versatile OSD in a single device will facilitate rapid development of a

reliable and attractive product.

40

4.1.3 Digital Video Format Converter

The FLI8532 (IC401) is a highly integrated digital video format converter for LCD-TV application using

patented de-interlacing and post processing algorithms from Faroudja Laboratories, coupled with highly

flexible scaling, a wide variety of aspect ratio conversions, and other special video enhancing features to

produce the highest quality image.

Inputs ‧ Input all industry standard and non-standard video resolutions, including 480i (NTSC),

576i(PAL/SECAM), 480p, 720p, 1080i, and VGA to XGA.

‧ Digital input, 8-bit Y/Cr/Cb (ITU-R BT656), 8-bit Y/Pr/Pb, 16-bit Y Cr/Cb (ITU-R BT601), 24-bit

RGB, YCrCb, YprPb

‧ Input pixel rate up to 75MHz maximum

Outputs ‧ Output resolutions include 480p, 576p, 720p,1080i, 1080p, and VGA to SXGA

‧ Interlaced or Progressive output

‧ In the FLI8532, digital output of 24-bit RGB, YCrCb, YPrPb (4:4:4), or 16/20-bit Y Cr/Cb(4:2:2)

are available

‧ Output pixel rate up to 135 MHz maximum

Formats ‧ Input color manipulation matrix supports all color spaces: RGB, YPrPb, 4:4:4 YCrCb, 4:2:2

YCr/Cb, ITU-R BT656, ITU-R BT601

‧ Output supports digital RGB, YPrPb, 4:4:4 YCrCb and 4:2:2 YCr/Cb

Frame Rate Conversion ‧ Tearless Frame Rate Conversion 50/60/72/75/100/120 Hz

Front End Processing

‧ Motion Adaptive Noise Reduction – Improves picture quality for off-air material.

‧ Cross Color Suppressor (CCS) - Removes cross color artifacts in composite video signals due

to poor Y/C separation in standard 2-D video decoders, eliminating the need for expensive 3-D

video decoders.

41

4.1.4 Video Decoder The FLI8532 chip has a sophisticated Analog Front End with 16 reconfigurable inputs

through an analog multiplexer to anti-alias filters before the Analog to Digital Converters (ADCs). These integrated features eliminate the need for any devices between the input connector and the pin of the FLI8532.

The figure above depicts the data-path for the AFE and Decoder blocks with connections to the input multiplexer that selects whether the data follows the Main Video Channel or PIP video channel.

The analog front end of FLI8532 provides the capability to capture 16 analog video inputs which can be a combination of Composite (CVBS), S-Video (SY, SC), YPrPb (Y, Pr, Pb) or RGB (R, G, B).

The FLI8532 front end provides filtering capability depending on the type of input video signal in use. The use of these filters eliminates the need to have any external filter components. The filters included are both in the analog as well as digital domain. The digital filter eases the design requirement of the analog anti-aliasing filter.

The analog filter is implemented with the following 3dB cutoff definition. 10 MHz – for SDTV 20 MHz – for 480p/576p 40 MHz – for 720p/1080i 180 MHz – for Graphics The digital filters are implemented as Quarter Band (QB), for SDTV and 480p/576p and as Half Band (HB), for 720p/1080i modes.

42

4.1.5 Audio Processor

The MSP3445 is single-chip multi-standard sound processor of NTSC analog TV standard. The full TV sound processing, starting with analog sound IF signal-in, down to processed analog AF-out, is performed in a single chip. This TV sound processing IC include version for processing the multi-channel television sound (MTS) signal conforming to the standard recommended by the Broadcast Television System Committee (BTSC). Current IC have to perform adjustment procedures in order to achieve good stereo separation for BTSC. The MSP3445 has optimum stereo performance without any adjustment. The MSP3445 has built-in automatic function: The IC is able to detect the actual sound standard automatically (Automatic Standard Detection). Furthermore, pilot levels and identification signals can be evaluated internally with subsequent switching between mono/stereo/bilingual; no I2C interaction is necessary (Automatic Sound Selection). The IC also include the Bass and Treble function.

44

5. Adjusting Procedure 5.1 Enter / exit the factory mode method

5.1.1 Enter the factory mode. In OSD, use remote control select “GENERAL SETTING” “FACTORY RESET”, then input “2005”, the OSD will into factory mode.

5.2 PC mode alignment 5.2.1 Preset condition.

5.2.1.1 Setting the contrast to 50%, brightness to 50%. 5.2.2.2 In D-SUB, input 1280x720 / 60Hz, NTSC color bar 100% (FIG.5-1, input level 100IRE 0.7Vp-p), then

do the ADC calibration (by auto alignment). 5.2.2 32grays pattern check:

5.2.2.1 Input 1280x720 / 60Hz & 32 grays pattern at 100IRE, adjust brightness 50%, and contrast 50%. 5.2.2.2 Color1 / Color2 / Color3, the 32 grays need clear. 5.2.2.3 Input 1280x720 / 60Hz & 32 grays pattern at 100IRE, adjust brightness 50%, and contrast 100%. 5.2.2.4 Color1 / Color2 / Color3, 32grays need > 4 level saturation.

5.2.3 Luminance test: 5.2.3.1 Input 1280x720 / 60Hz full white pattern at 100IRE, adjust brightness 100 and contrast 100%. 5.2.3.2 Color1, Color2, Color3: Y > 400cd/m2 (Both analog & HDMI PC mode).

5.3 Component 1 & 2 mode alignment 5.3.1 Input 720p mode then do the ADC calibration (by auto alignment) at NTSC color bar 100% pattern. 5.3.2 Check black pattern (0 IRE); the luminance should be under 1 cd/m2. 5.3.3 Component Color1, Color2 R /G /B gain copy from D-SUB source R /G /B gain.

5.4 Composite mode alignment. 3.1 Select AV1 and input 480i mode, NTSC color bar 100% pattern then to do ADC calibration (by auto

alignment). 3.2 TV, S-Video doesn＇t need to do ADC calibration (They are same as AV1).

FIG.5-1

45

6. Trouble Shooting Flow Chart 6.1 No Display on Screen (Screen is black, no power)

47

6.2 No Sound (Test signal: 0.5Vrms sine waveform)

48

APPENDIX A. Block &Schematic Diagram

49

APPENDIX B. PWB Layout Main board

53

Key board

54

LVDS board

55

Front board

57

IR board

59

APPENDIX C. Block & Schematic diagram Main board

70

Front board

71

IR board

72

APPENDIX D. Recommend Spare Parts List ( For LT27HGN 50AAP)

76

Recommend Spare Parts List ( For LT32FGN 50AAP)

80

Recommend Spare Parts List ( For LT37FGN 50AAP)

lt27h -32f-37f

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