LG 43LH570 SERIES Service Manual Download Page 21

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LGE Internal Use Only

Only for training and service purposes

Check RF cable & signal

Check Tuner power

L6504: 3.3V

Replace L6504

Check Tuner I2C

R651, R652, R115, R116

Replace R651, R652, R115, R116

Follow procedure

“9. All source audio”

Check IF signal

TU3700 6,7pin

Replace Tuner

or IC101

or Main Board

Check AV cable

Check audio signal

L : VA3411,R3418,C3405

R3423,R3425

R : VA3410,R3417,C3404

R3422,R3424

Replace audio signal component

L : VA3411,R3418,C3405

R3423,R3425

R : VA3410,R3417,C3404

R3422,R3424

Check Jack Audio signal

L : R3417

R : R3418

Replace Jack JK3401

Follow procedure

“9. All source audio”

9. Digital / Analog TV No sound

10. AV No sound

11. Component No sound

Check Component cable

Check audio signal

L : VA3411,R3418,C3405

R3423,R3425

R : VA3410,R3417,C3404

R3422,R3424

Replace audio signal component

L : VA3411,R3418,C3405

R3423,R3425

R : VA3410,R3417,C3404

R3422,R3424

Check Jack Audio signal

L : R3417

R : R3418

Replace Jack JK3401

Follow procedure

“9. All source audio”

Summary of Contents for 43LH570 SERIES

Page 1: ... MFL69442202 1602 REV00 CHASSIS LA66L MODEL 43LH570 43LH570 U MODEL 49LH570 49LH570 U CAUTION BEFORE SERVICING THE CHASSIS READ THE SAFETY PRECAUTIONS IN THIS MANUAL LED TV SERVICE MANUAL Internal Use Only ...

Page 2: ...ics Inc All rights reserved Only for training and service purposes CONTENTS CONTENTS 2 SAFETY PRECAUTIONS 3 SERVICING PRECAUTIONS 4 SPECIFICATION 6 ADJUSTMENT INSTRUCTION 9 TROUBLE SHOOTING GUIDE 17 BLOCK DIAGRAM 23 EXPLODED VIEW 24 DISASSEMBLY 25 ...

Page 3: ...inals etc to be sure the set is safe to operate without damage of electrical shock Leakage Current Cold Check Antenna Cold Check With the instrument AC plug removed from AC source connect an electrical jumper across the two AC plug prongs Place the AC switch in the on position connect one lead of ohm meter to the AC plug prongs tied together and touch other ohm meter lead in turn to each exposed m...

Page 4: ...lectrostatic charge on your body by touching a known earth ground Alter natively obtain and wear a commercially available discharging wrist strap device which should be removed to prevent poten tial shock reasons prior to applying power to the unit under test 2 After removing an electrical assembly equipped with ES devices place the assembly on a conductive surface such as aluminum foil to prevent...

Page 5: ...he solder joints of the two original leads If they are not shiny reheat them and if necessary apply additional solder Fuse and Conventional Resistor Removal Replacement 1 Clip each fuse or resistor lead at top of the circuit board hollow stake 2 Securely crimp the leads of replacement component around notch at stake top 3 Solder the connections CAUTION Maintain original spacing between the replace...

Page 6: ...t be operated for about 20 minutes prior to the adjustment 3 Test method 1 Performance LGE TV test method followed 2 Demanded other specification Safety UL CSA IEC specification EMC FCC ICES IEC specification 4 General Specification No Item Specification Result Remark 1 Receiving System ATSC NTSC M 64 256 QAM 2 Available Channel VHF 02 13 UHF 14 69 DTV 02 69 CATV 01 135 CADTV 01 135 3 Input Voltag...

Page 7: ...80I 3 720 480 31 500 60 000 27 027 SDTV 480P 4 720 480 31 470 59 940 27 000 SDTV 480P 5 1280 720 45 000 60 000 74 250 HDTV 720P 6 1280 720 44 960 59 940 74 176 HDTV 720P 7 1920 1080 33 750 60 000 74 250 HDTV 1080I 8 1920 1080 33 720 59 940 74 176 HDTV 1080I 9 1920 1080 67 500 60 000 148 500 HDTV 1080P 10 1920 1080 67 432 59 940 148 352 HDTV 1080P 11 1920 1080 27 000 24 000 74 250 HDTV 1080P 12 192...

Page 8: ...8 5 WUXGA Reduced Blanking FHD only DTV 1 640 480 31 46 59 94 25 125 SDTV 480P 2 640 480 31 5 60 00 25 125 SDTV 480P 3 720 480 15 73 59 94 13 500 SDTV 480I Spec out but display 4 720 480 15 75 60 00 13 514 SDTV 480I Spec out but display 5 720 480 31 47 59 94 27 00 SDTV 480P 6 720 480 31 5 60 27 027 SDTV 480P 7 1280 720 44 96 59 94 74 176 HDTV 720P 8 1280 720 45 60 00 74 25 HDTV 720P 9 1920 1080 33...

Page 9: ...s hatch pattern 09ch there can some afterimage in the black level area 3 Adjustment items 3 1 Main PCBA Adjustments 1 ADC adjustment OTP Component 2 EDID downloads for HDMI 3 2 Final assembly adjustment 1 White Balance adjustment 2 RS 232C functionality check 3 Factory Option setting per destination 4 Shipment mode setting In Stop 5 GND and HI POT test 3 3 Appendix 1 Tool option menu USB Download ...

Page 10: ... Port Jack 3 Play Test F9 button and confirm OK Message 4 remove LAN CABLE Step 1 Step 3 Check OK Signal 4 4 EDID Download 4 4 1 Overview It is a VESA regulation A PC or a MNT will display an optimal resolution through information sharing without any necessity of user input It is a realization of Plug and Play 4 4 2 Equipment Since embedded EDID data is used EDID download JIG HDMI cable and D sub ...

Page 11: ... reserved Only for training and service purposes 2 HDMI2 6D 86 4 4 3 3 HD DTS 2D 8bit xvYCC off 32LH57 1 HDMI1 6D 8D 2 HDMI2 6D 7D 4 4 3 4 FHD PCM 2D 8bit xvYCC off 43 49 55LH57 1 HDMI1 E5 CC 2 HDMI2 E5 BC 4 4 3 5 FHD AC3 2D 8bit xvYCC off 43 49 55LH57 1 HDMI1 E5 5A ...

Page 12: ...e White balance adjustment Keep power on status don t power off 5 1 1 2 Adj condition and cautionary items 1 Lighting condition in surrounding area surrounding lighting should be lower 10 lux Try to isolate adj area into dark surrounding 2 Probe location Color Analyzer CA 210 probe should be within 10cm and perpendicular of the module surface 80 100 3 Aging time After Aging Start Keep the Power ON...

Page 13: ... as end command wb 00 ff and Adj offset if need 5 1 5 2 Manual adjustment 1 Set TV in Adj mode using POWER ON 2 Zero Calibrate the probe of Color Analyzer then place it on the center of LCD module within 10cm of the surface 3 Press ADJ key EZ adjust using adj R C à 9 White Balance then press the cursor to the right KEY When KEY is pressed 206 Gray internal pattern will be displayed 4 Adjust Cool m...

Page 14: ...6 9 279 284 294 303 321 343 4 10 19 277 280 292 299 319 339 5 20 35 275 277 290 296 317 336 6 36 49 274 274 289 293 316 333 7 50 79 273 272 288 291 315 331 8 80 119 272 271 287 290 314 330 9 Over 120 271 270 286 289 313 329 3 O S Module AUO INX Sharp CSOT BOE cool med warm x y x y x y spec 271 270 286 289 313 329 target 278 280 293 299 320 339 5 2 Option selection per country 5 2 1 Overview 1 Tool...

Page 15: ...ne wave signal 100 Modulation 2 CVBS Component 1KHz sine wave signal 0 4Vrms 6 2 Specification No Item Min Typ Max Unit Remark 1 Audio practical max Output L R Distor tion 10 max Output 4 5 6 0 5 0 6 32 6 0 6 93 W Vrms 1 Measurement condition EQ AVL Clear Voice Off 2 Speaker 6Ω Impedance 3 49 43LH57 2 2 7 4 03 3 0 4 24 3 6 4 64 W Vrms 1 Measurement condition EQ AVL Clear Voice Off 2 Speaker 6Ω Imp...

Page 16: ...unch in the number Each model has their number 9 Optional adjustments 9 1 Manual White balance Adjustment 9 1 1 Adj condition and cautionary items 1 Lighting condition in surrounding area surrounding lighting should be lower 10 lux Try to isolate adj area into dark surrounding 2 Probe location Color Analyzer CA 210 probe should be within 10cm and perpendicular of the module surface 80 100 3 Aging ...

Page 17: ...K Check Audio Speaker out Audio OK Next page Back end block Audio NG Check voltage 13V P2300 3 4 5 6 pin NG Check Power connector 12PIN NG Short check voltage 13V NG Replace Power board Check stand by voltage 13V L2303 C2303 NG Replace L2303 C2303 OK Check X TAL X101 NG Replace X101 OK Check POWER ON signal P2300 1 pin Low Download software Main NG Replace IC101 or Main Board Check multi voltage 1...

Page 18: ...51 R652 R115 R116 Replace R651 R652 R115 R116 Replace IC101 or Main Board OK Check IF signal TU6703 6 7 pin NG Replace Tuner OK NG Replace Tuner or IC101 or Main Board NG 4 AV Video No signal Check input signal format Is it supported OK Check AV cable OK Check AV Jack CVBS signal R3407 Replace AV Jack JK3401 Replace IC101 or Main Board OK Check CVBS signal VA3415 R3421 C3411 R3407 R340 C321 NG Rep...

Page 19: ...R3419 R3409 NG Replace VA3412 R3419 R3409 OK Check input signal format Is it supported OK Check HDMI cable OK Check DDC in start menu NG Replace DDC component HDMI1 AR3208 AR3207 D3200 HDMI2 AR3234 AR3231 D3203 OK NG Replace Main Board or HDMI Jack HDMI1 JK3201 HDMI2 JK3202 Check DDC component HDMI1 AR3208 AR3207 D3200 HDMI2 AR3234 AR3231 D3203 NG Check TMDS signal HDMI1 JK3201 HDMI2 JK3202 1 3 4 ...

Page 20: ... Out TV Speaker NG Select TV Speaker Check AMP IC IC5600 Power L5600 24V L5601 3 3V NG Replace AMP power component L5600 13V L5601 3 3V OK NG Check Power connector 12PIN Replace Power board NG Check AMP I2C AR5601 AR7201 C5602 C5604 NG Replace AMP I2C component AR5601 AR7201 C5602 C5604 NG Replace AMP IC IC5600 or Main IC IC101 or Main Board OK Check I2S signal IC5600 7 8 38 pin NG Replace Main IC...

Page 21: ... C3405 R3423 R3425 R VA3410 R3417 C3404 R3422 R3424 NG Replace audio signal component L VA3411 R3418 C3405 R3423 R3425 R VA3410 R3417 C3404 R3422 R3424 OK Check Jack Audio signal L R3417 R R3418 Replace Jack JK3401 NG Follow procedure 9 All source audio OK 9 Digital Analog TV No sound 10 AV No sound 11 Component No sound Check Component cable OK Check audio signal L VA3411 R3418 C3405 R3423 R3425 ...

Page 22: ...k DDC in start menu NG Replace DDC component HDMI1 AR3208 AR3207 D3200 HDMI2 AR3234 AR3231 D3203 OK NG Replace Main Board or HDMI Jack HDMI1 JK3201 HDMI2 JK3202 Check DDC component HDMI1 AR3208 AR3207 D3200 HDMI2 AR3234 AR3231 D3203 NG Check HDMI pattern JK3201 JK2301 IC101 HDMI pattern NG Replace Main Board OK Replace Main IC IC101 or Main Board 12 HDMI No sound ...

Page 23: ...MP Digital Demod IF Sub Micom R5F100GEAFB IR KEY IR KEY I2C HDMI MUX LVDS USB SPDIF OUT ETHERNET USB1 OCP 1 5A HDMI1 ARC REAR OPTIC LAN 51P DDR3 1866 2Gb x16 X_TAL 24MHz WIFI SUB ASSY USB_WIFI Tuner DDR3 1866 2Gb x16 HDMI2 SIDE CVBS YPbPr AV COMP REAR EEPROM 256Kb eMMC 5 0 4GB I2S I2C I2C I2C Analog Demod HD Model 30P RS 232 RS 232 RS 232 US Only ...

Page 24: ...acteristics These parts are identified by in the Schematic Diagram and EXPLODED VIEW It is essential that these special safety parts should be replaced with the same components as recommended in this manual to prevent Shock Fire or other Hazards Do not modify the original design without permission of manufacturer IMPORTANT SAFETY NOTICE 200 800 540 521 500 530 820 400 120 LV1 570 902 901 700 A10 S...

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