LG Centric 42LY750H Service Manual Download Page 27

Page: 27 / 50

THE SYMBOL MARK OF THIS SCHEMETIC DIAGRAM INCORPORATES
SPECIAL FEATURES IMPORTANT FOR PROTECTION FROM X-RADIATION.
FILRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS
ESSENTIAL THAT ONLY MANUFATURES SPECFIED PARTS BE USED FOR
THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC.

CI_ADDR[3]

CI_DATA[7]

CI_ADDR[4]

CI_DATA[2]

CI_ADDR[7]

CI_ADDR[8]

CI_ADDR[10]

CI_ADDR[14]

CI_DATA[5]

CI_DATA[6]

CI_DATA[3]

CI_ADDR[12]

CI_ADDR[0]

CI_ADDR[5]

CI_ADDR[11]

CI_DATA[0]

CI_ADDR[1]

CI_DATA[1]

CI_DATA[4]

CI_ADDR[13]

CI_ADDR[6]

CI_ADDR[2]

CI_ADDR[9]

TP324

MTK_HPD_3

D0+_HDMI2_JACK

R379

1.2K

TP321

SCART_ROUT_SOC

TP345

C355

0.047uF

DTV/MNT_V_OUT_SOC

C397
1200pF

C359

0.047uF

TP374

C398

1200pF

C382
0.1uF

C354
0.1uF

/PCM_WE

TP375

VDD3V3

TP372

D2+_HDMI3_JACK

TP326

C307

0.1uF

C336

1uF

10V

IF_AGC

C361

1uF

CK+_HDMI4_JACK

R378

1.2K

VDD3V3

SC_R_SOC

D2-_HDMI3_JACK

C380
0.1uF

TP322

TP307

C3001
1200pF

+1.2V_MTK_AVDD

R309

100K

EPHY_TDP

TP311

R371

100

D2-_HDMI4_JACK

TP318

SCART_ROUT_SOC

TXB1P

AUD_LRCH

TP313

SC_B_SOC

CK-_HDMI2_JACK

OSCL2

OSDA2

D1-_HDMI2_JACK

C302
0.1uF

DDC_SCL_4_JACK

R335

EPHY_RDP

TP365

DAC_3V3

SCART_LOUT_SOC

5V_HDMI_2_JACK

R368

100

TP355

+1.2V_MTK_AVDD

TP300

D1+_HDMI3_JACK

SC_G_SOC

TP341

DDC_SCL_2_JACK

R343

24K

VDD3V3

SC_G_SOC

TP370

C341
0.047uF

TP308

C393
22pF

OPT

R367

100

C387
22pF

OPT

VDD3V3_ETN

C308
0.1uF

TP366

/CI_CD1

D0+_HDMI4_JACK

D2+_HDMI2_JACK

TXB1N

SC_L_IN_SOC

C364
0.1uF

ARC

TP317

SPDIF_OUT

TP359

D0-_HDMI4_JACK

C351
0.1uF

IF_P

TU_CVBS

WIFI_DM

R334

TUNER_SIF

TP338

SC_R_SOC

TP320

DDC_SCL_3_JACK

C316
0.1uF

TP373

C337

1uF

10V

/PCM_REG

VDD3V3

EPHY_RDN

WIFI_DP

R308

1.2K

OPT

R366

100

+1.2V_MTK_AVDD

D2-_HDMI2_JACK

TP314

DDC_SDA_2_JACK

D1+_HDMI4_JACK

+1.2V_MTK_AVDD

VDD3V3

C399
1200pF

EXT_SPK_ROUT_MAIN

TP356

PCM_5V_CTL

R315

24K

D1+_HDMI2_JACK

TP342

CK+_HDMI3_JACK

VDD3V3

AUD_LRCK

TP358

EPHY_TDN

TP312

AUD_MASTER_CLK

/PCM_IORD

TP343

D2+_HDMI4_JACK

/PCM_CE1

R307

C304

0.1uF

DTV/MNT_V_OUT_SOC

TP319

SC_COM_SOC

HDMI_ARC

R376

1.2K

CK-_HDMI4_JACK

D1-_HDMI4_JACK

CK-_HDMI3_JACK

D0+_HDMI3_JACK

SC_FB_SOC

5V_HDMI_4_JACK

C389
22pF

OPT

TP377

R377

1.2K

R305

TP367

TP323

C363

1uF
25V

/PCM_OE

5V_HDMI_3_JACK

SC_R_IN_SOC

SC_CVBS_IN_SOC

VDD3V3

SC_COM_SOC

SC_ID_SOC

SC_L_IN_SOC

CI_DATA[0-7]

C358

0.01uF

50V

TP316

D0-_HDMI2_JACK

CK+_HDMI2_JACK

DDC_SDA_4_JACK

ARC

R340

100

TP339

SC_FB_SOC

IF_N

R342

10K

SC_CVBS_IN_SOC

TP371

DDC_SDA_3_JACK

+1.2V_MTK_AVDD

TP340

R332

10K

C347
0.1uF

AUD_SCK

SC_R_IN_SOC

TP357

TP325

PCM_RST

D1-_HDMI3_JACK

/PCM_IOWR

SC_B_SOC

SCART_LOUT_SOC

R304

CI_ADDR[0-14]

R303

TP315

TP309

D0-_HDMI3_JACK

/PCM_WAIT

EXT_SPK_LOUT_MAIN

TP368

TP344

/CI_CD2

TP364

TP369

R302

180

C352

0.01uF

TP354

C396
33pF

OPT

+5V_NORMAL

MODEL_OPT_10

MODEL_OPT_2

PCM_5V_CTL

EMMC_RST

MODEL_OPT_8

MODEL_OPT_9

C365
0.01uF

C305

1uF
25V

C362
0.1uF

C350

0.1uF

C311

1uF
10V

C310

33pF

C312

33pF

USB_DP1

USB_DM1

IC105

LGE2112

HDMI_CEC

AA32

HDMI_0_SCL

AG33

HDMI_1_SCL

AE33

HDMI_2_SCL

AC33

HDMI_3_SCL

AH32

HDMI_0_SDA

AF33

HDMI_1_SDA

AD33

HDMI_2_SDA

AB33

HDMI_3_SDA

AH33

HDMI_0_PWR5V

AG31

HDMI_1_PWR5V

AE31

HDMI_2_PWR5V

AC31

HDMI_3_PWR5V

AH31

HDMI_0_HPD

AG32

HDMI_1_HPD

AE32

HDMI_2_HPD

AC32

HDMI_3_HPD

AJ32

AVDD12_HDMI_0_RX

AA24

AVDD12_HDMI_1_RX

Y24

AVDD12_HDMI_2_RX

W24

AVDD12_HDMI_3_RX

AB24

AVDD33_HDMI_0_RX

AB29

AVDD33_HDMI_1_RX

AA29

AVDD33_HDMI_2_RX

Y29

AVDD33_HDMI_3_RX

AC29

AVSS33_HDMI_RX_1

AB30

AVSS33_HDMI_RX_2

AD30

AVSS33_HDMI_RX_3

AF31

AVSS33_HDMI_RX_4

AF32

USB_DP_P0

C36

USB_DM_P0

C37

USB_DP_P1

D36

USB_DM_P1

D37

USB_DP_P2

AT13

USB_DM_P2

AU13

USB_DP_P3

AT14

USB_DM_P3

AU14

AVDD33_USB_P0P1

D35

AVDD33_USB_P2P3

AP13

AVSS33_USB_P1

D34

AVSS33_USB_P2

AR13

PCIE11_TXP

W35

PCIE11_TXN

W34

PCIE11_RXN

Y34

PCIE11_RXP

Y35

AVDD12_PCIE11

U24

AVDD33_PCIE11

V24

AVSS12_PCIE11

W30

PCIE11_REFCKN

W36

PCIE11_REFCKP

W37

HDMI_0_RX_0

AG35

HDMI_0_RX_0B

AG34

HDMI_0_RX_1

AG37

HDMI_0_RX_1B

AG36

HDMI_0_RX_2

AF35

HDMI_0_RX_2B

AF34

HDMI_0_RX_C

AH35

HDMI_0_RX_CB

AH34

HDMI_1_RX_0

AE37

HDMI_1_RX_0B

AE36

HDMI_1_RX_1

AD35

HDMI_1_RX_1B

AD34

HDMI_1_RX_2

AC35

HDMI_1_RX_2B

AC34

HDMI_1_RX_C

AE35

HDMI_1_RX_CB

AE34

HDMI_2_RX_0

AB35

HDMI_2_RX_0B

AB34

HDMI_2_RX_1

AA35

HDMI_2_RX_1B

AA34

HDMI_2_RX_2

AA37

HDMI_2_RX_2B

AA36

HDMI_2_RX_C

AC37

HDMI_2_RX_CB

AC36

HDMI_3_RX_0

AK35

HDMI_3_RX_0B

AK34

HDMI_3_RX_1

AJ35

HDMI_3_RX_1B

AJ34

HDMI_3_RX_2

AJ37

HDMI_3_RX_2B

AJ36

HDMI_3_RX_C

AJ33

HDMI_3_RX_CB

AK33

TXVP_0

AT18

TXVN_0

AU18

RXVN_1

AU17

RXVP_1

AT17

PHYLED1

AN16

PHYLED0

AM16

REXT

AD15

AVDD12_REC

AD14

AVDD33_COM

AD16

AVDD33_LD

AD17

AVSS33_LD

AL16

AVSS33_COM

AL15

AVSS12_REC

AL14

IC105

LGE2112

TCON0

F27

TCON1

E27

TCON2

F30

TCON3

F29

TCON4

B27

TCON5

A27

TCON6

B28

TCON7

A28

TCON8

C28

TCON9

D28

TCON10

E28

TCON11

F28

TCON12

B29

AVDD12_LVDS_1

AG6

AVDD12_LVDS_2

AJ6

AVDD12_VPLL

AF6

AVDD33_LVDSB

AE6

AVDD33_LVDSA

AH7

AVSS12_LVDS_2

AJ5

AVSS12_LVDS_1

AG5

AVSS12_VPLL

AF5

AVSS33_LVDSB

AE5

AVSS33_LVDSA

AH5

REXT_VPLL

AG7

AIN0_R_AADC

AU37

AIN0_L_AADC

AU35

AIN1_R_AADC

AT35

AIN1_L_AADC

AT37

AIN2_R_AADC

AU36

AIN2_L_AADC

AP34

AIN3_R_AADC

AT36

AIN3_L_AADC

AR37

AIN4_R_AADC

AR33

AIN4_L_AADC

AP32

AIN5_R_AADC

AR36

AIN5_L_AADC

AP37

AIN6_R_AADC

AR35

AIN6_L_AADC

AP36

AVDD33_AADC

AL31

AVSS33_AADC

AJ28

VMID_AADC

AJ27

MPXP

AN28

ADCINP_DEMOD

AU32

ADCINN_DEMOD

AT32

AVDD33_DEMOD

AD22

AVDD12_DEMOD

AL27

AVSS33_DEMOD

AM28

AVSS12_DEMOD

AJ26

IF_AGC

U35

RF_AGC

U34

LOUTN

AP31

LOUTP

AN30

OSCL2

V35

OSDA2

V34

SC0

AP28

SY0

AR29

CVBS3P

AT30

CVBS2P

AR30

CVBS1P

AR31

CVBS0P

AN29

CVBS_COM

AP30

AVDD33_CVBS_1

AK24

AVDD33_CVBS_2

AK25

AVSS33_CVBS_1

AL25

AVSS33_CVBS_2

AM26

AO3N

AG3

AO3P

AG4

AO4N

AG1

AO4P

AG2

AOCLKN

AF3

AOCLKP

AF4

AO2N

AE3

AO2P

AE4

AO1N

AE1

AO1P

AE2

AO0N

AD1

AO0P

AD2

AE4N

AL3

AE4P

AL4

AE3N

AL1

AE3P

AL2

AECLKN

AK3

AECLKP

AK4

AE2N

AJ3

AE2P

AJ4

AE1N

AJ1

AE1P

AJ2

AE0N

AH3

AE0P

AH4

BO4N

AT2

BO4P

AU2

BO3N

AT1

BO3P

AU1

BOCLKN

AR1

BOCLKP

AR2

BO2N

AP1

BO2P

AP2

BO1N

AN1

BO1P

AN2

BO0N

AM3

BO0P

AM4

BE4N

AT6

BE4P

AU6

BE3N

AP6

BE3P

AR6

BECLKN

AP5

BECLKP

AR5

BE2N

AT4

BE2P

AU4

BE1N

AP4

BE1P

AR4

BE0N

AP3

BE0P

AR3

AR0_ADAC

AN35

AL0_ADAC

AN34

AR1_ADAC

AM32

AL1_ADAC

AM34

AR2_ADAC

AM37

AL2_ADAC

AM33

AR3_ADAC

AM36

AL3_ADAC

AM35

AVDD33_DAC

AG30

AVDD33_DAC1

AF30

AVSS33_DAC

AK30

AVSS33_DAC1

AE30

ALIN

Y33

ASPDIF0

AR16

ASPDIF1

Y32

AOBCK

AR11

AOLRCK

AP11

AOMCLK

AM12

AOSDATA4

AM10

AOSDATA3

AM11

AOSDATA2

AN11

AOSDATA1

AN10

AOSDATA0

AN9

HSYNC

AN25

VSYNC

AM25

AR25

AR24

AU24

COM

AP24

SOG

AT24

VGA_SDA

AR22

VGA_SCL

AP22

COM1

AT26

PB1P

AR26

PR1P

AP26

Y1P

AU26

SOY1

AP25

COM0

AU28

PB0P

AT28

PR0P

AR28

Y0P

AP27

SOY0

AR27

VDACX_OUT

AU30

VDACY_OUT

AP29

AVDD33_VDAC_BG

AD20

AVDD33_VDAC

AD21

AVDD12_RGB

AD19

AVSS33_VDAC_BG

AJ22

AVSS12_RGB

AJ21

AVSS33_VDAC

AL24

TP378

SC_DET

USB_DP2

USB_DM2

MTK_HPD_2

MTK_HPD_1

C321
10uF
10V

C353
10uF
10V

C356
10uF
10V

C327

1uF

C328
0.1uF

HP_ROUT_AMP

L302

BLM18PG121SN1D

HP_OUT

C332
0.22uF
10V

HP_OUT

HP_ROUT

L303

BLM18PG121SN1D

HP_OUT

C331
0.22uF
10V

HP_OUT

HP_LOUT

HP_LOUT_AMP

R369

1.2K

HP_OUT

R370

1.2K

HP_OUT

C383

1200pF

HP_OUT

R351

1.2K

HP_OUT

HP_LOUT_MAIN

C377

1200pF

HP_OUT

HP_ROUT_MAIN

R352

1.2K

HP_OUT

C390
1200pF

HP_OUT

C395
1200pF

HP_OUT

GST_SOC

MCLK_SOC

EO_SOC

VCOM_DYN

GCLK_SOC

TXA1N

TXA1P

TXACLKN

TXA4P

TXACLKP

TXA4N

TXB0N

TXB2N

TXB0P

TXB2P

PMIC_RESET

EXT_

R346

R380

R331

MID_MAIN_2

2012.12.10

Close to MT5369

PLACE AT JACK SIDE

Close to Tuner

CHANGE SYMBOL

Don’t use as GPIO

For PCB Pattern

Close to MT5369

USB Port was changed !!!!

xxLP860H-ZA

USB2 W/O HUB

USB1 W/ HUB

To NEC & HDMI

Place Close To MTK5369(IC105)

Place at JACK SIDE

CH3

CH2

CH1

CH6

CH5

CH4

Only for training and service purposes

LGE Internal Use Only

Summary of Contents for Centric 42LY750H

Page 1: ...ODEL 55LP860H 55LP860H ZA CAUTION BEFORE SERVICING THE CHASSIS READ THE SAFETY PRECAUTIONS IN THIS MANUAL LED TV SERVICE MANUAL North Latin America http aic lgservice com Europe Africa http eic lgservice com Asia Oceania http biz lgservice com Internal Use Only ...

Page 2: ...nc All rights reserved Only for training and service purposes CONTENTS CONTENTS 2 SAFETY PRECAUTIONS 3 SERVICING PRECAUTIONS 4 SPECIFICATION 6 ADJUSTMENT INSTRUCTION 8 TROUBLESHOOTING GUIDE 16 BLOCK DIAGRAM 24 EXPLODED VIEW 25 SCHEMATIC CIRCUIT DIAGRAM ...

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: ...ctrostatic charge on your body by touching a known earth ground Alter natively obtain and wear a commercially available discharg ing wrist strap device which should be removed to prevent potential 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 e...

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 EU PAL Market 37Countries DTV MPEG2 4 DVB T 37 countries Albania Austria Belarus Belgium Bosnia Bulgaria Croatia Czech Denmark Estonia Finland France Germany Greece Hungary Ireland Italy Kazakhstan Latvia Lithuania Lux embourg Morocco Netherlands Norway Poland Portugal Romania Russia Serbia Slovakia Slovenia Spain Sweden Switzerland Turkey UK Ukraine DTV MPEG2 4 DVB C 37 countries Albania Austri...

Page 7: ...L WOWLAN Support 11 Ext Speaker out 1EA Ext Speaker out Stereo 1 W 8 Ω Fix Variable Line Out 12 Ext Volume control 1EA Ext volume control 13 RS 232C SVC Control Power outlet Selectable 12V 1A or 5V 2A 14 Audio Input 1EA AV L R Input 5 HDMI input DTV mode No Resolution H freq kHz V freq Hz Pixel clock Remarks 1 720 480 31 469 31 5 59 94 60 SDTV 480P LP860H ZA not support HDMI PC mode but can displa...

Page 8: ...for 2 hours In case of keeping module is in the circumstance of below 20 C it should be placed in the circumstance of above 15 C for 3 hours Caution When still image is displayed for a period of 20 minutes or longer Especially where W B scale is strong Digital pattern 13ch and or Cross hatch pattern 09ch there can some afterimage in the black level area 3 Automatic Adjustment 3 1 MAC address D L C...

Page 9: ...r at Instart menu 3 4 2 Method notice 1 Serial number D L is using of scan equipment 2 Setting of scan equipment operated by Manufacturing Technology Group 3 Serial number D L must be conformed when it is produced in production line because serial number D L is mandatory by D book 4 0 Manual Download Model Name and Serial Number If the TV set is downloaded by OTA or service man sometimes model nam...

Page 10: ...nt ADC adjustment is not needed because of OTP Auto ADC adjustment 4 1 EDID DATA 4 1 1 2D EDID Reference HDMI1 HDMI3 In the data of EDID bellows may be different by S W or Input mode ⓐ Product ID ⓑ Serial No Controlled on production line ⓒ Month Year Controlled on production line ex Monthly 01 01 Year 2013 17 ⓓ Model Name Hex LGTV ⓔ Checksum LG TV Changeable by total EDID data ⓕ Vendor Specific HD...

Page 11: ...m and begin adj 5 When adj is complete OK Sign check adj status pre mode Warm Medium Cool 6 Remove probe and RS 232C cable to complete adj W B Adj must begin as start command wb 00 00 and finish as end command wb 00 ff and Adj offset if need 2 Manual adjustment method 1 Set TV in Adj mode using P Only key 2 Zero Calibrate the probe of Color Analyzer then place it on the center of LCD module within...

Page 12: ...0 002 0 273 0 002 13 000 K 0 0000 Medium 0 285 0 002 0 293 0 002 9 300 K 0 0000 Warm 0 313 0 002 0 329 0 002 6 500 K 0 0000 GP4 Aging time Min Cool Medium Warm X y x y x y 269 273 285 293 313 329 1 0 2 280 287 296 307 320 337 2 3 5 279 285 295 305 319 335 3 6 9 277 284 293 304 317 334 4 10 19 276 283 292 303 316 333 5 20 35 274 280 290 300 314 330 6 36 49 272 277 288 297 312 327 7 50 79 271 275 28...

Page 13: ...MSHG 600 Remark Inspect in Power Only Mode and check SW version in a master equipment 4 6 Local Dimming Function Check Step 1 Turn on TV Step 2 Press TILT key on the Adj R C Step 3 At the Local Dimming mode module Edge Backlight moving right to left Back light of IOP module moving Step 4 Confirm the Local Dimming mode Step 5 Press exit key 4 7 Magic Motion Remote control test 1 Equipment RF Remote...

Page 14: ... on SVC Remote control in power only mode or PCB mode 3 Check the LED of jig board 5 V 12 V LED OK condition Turn On IR LED OK condition blinking 3 Check the power out IR out mini jig 1 Connect mini jig on RS232c port 2 Press RED Color Button on SVC Remote control in power only mode or PCB mode 3 Check the LED of mini jig 4 Pro Idiom Check 1 Connect the RF Cable 2 Turn to the Pro Idiom channel No ...

Page 15: ...ess 7 2 2 Checkpoint TEST voltage GND 1 5 KV min at 100 mA SIGNAL 3 KV min at 100 mA TEST time 1 second TEST POINT GND TEST POWER CORD GND SIGNAL CABLE METAL GND Hi pot TEST POWER CORD GND LIVE NEUTRAL LEAKAGE CURRENT At 0 5 mArms 8 USB S W Download Service only 1 Put the USB Stick to the USB socket 2 Automatically detecting update file in USB Stick If your downloaded program version in USB Stick ...

Page 16: ...Check IC8700 RESET pin Check LVDS Cable Check X8701 Clock 10MHz Check IC8700 IIC Communication status Check IR input state of IC8700 13pin Re download NEC Micom Check LCD Module Control board Check power connector and RL_ON signal OK Check power connector and RL_ON signal OK Check Q2407 application circuit Or replace Q2407 Check switch SW8700 Replace Cable Check X8701 application circuit or Replac...

Page 17: ... Analog RF Video Trouble Shooting guide Check RF cable signal Check tuner 3 3V power L6502 Check tuner 5V power L6501 Check MTK LVDS output Check TU6500 Pin8 Video output Check tuner 1 8V power IC6501 2pin 1 8V Replace L6502 Check IC2404 Replace IC105 Replace Tuner Replace IC6501 Replace IC2404 N N N N N Y Y Y Y Y N ...

Page 18: ...ice purposes 4 Digital RF Trouble Shooting guide Check RF cable signal Check DIF Signal TU6500 Pin 10 11 Check IIC Signal TU6500 Pin 3 4 Replace IC105 Check tuner 5V power L6501 Check X100 and application circuit Replace TU6500 Replace TU6500 Check IC2404 Replace IC2404 Replace X100 N N N N N Y Y Y Y Y ...

Page 19: ...eck the input of MTK IC105 Measure waveform at C616 because it s more easy to check Can you see the normal waveform Check JK4600 Can you see the normal waveform Check AC cable for damage For damage or open conductor This board has big problem because Main chip MTK have some troubles After checking thoroughly all path once again You should decide to replace MTK or not Replace JK4600 N Y Y Y Y ...

Page 20: ...ubles After checking thoroughly all path once again You should decide to replace MTK or not Check JK3301 JK3302 JK3303 Can you see the normal waveform Check HDCP key NVRAM IC100 Power I2C signal Check AC cable for damage For damage or open conductor Check the input of MTK IC105 Measure waveform at R3314 R3315 R3328 R3329 R3308 R3309 because it s more easy to check Can you see the normal waveform R...

Page 21: ...and service purposes 7 Analog RF Audio Trouble Shooting guide Check RF cable signal Check IC5400 Check Audio AMP output L5402 L5403 L5404 L5405 Replace IC105 Check TU6500 Pin6 SIF output Replace Tuner Replace L5402 L5403 L5404 L5405 Replace IC5400 Check C352 SIF signal to IC105 N N N Y Y Y Y Y ...

Page 22: ...hip MTK have some troubles After checking thoroughly all path once again You should decide to replace MTK or not Check JK4600 Can you see the normal waveform Check Audio AMP output L5402 L5403 L5404 L5405 Check AC cable for damage For damage or open conductor Check the input of MTK IC105 Measure waveform at C610 C611 because it s more easy to check Can you see the normal waveform Replace JK4600 Re...

Page 23: ...rted This board has big problem because Main chip MTK have some troubles After checking thoroughly all path once again You should decide to replace MTK or not Check JK3301 JK3302 JK3303 Can you see the normal waveform Check Audio AMP output L5402 L5403 L5404 L5405 Check AC cable for damage For damage or open conductor Replace JK3301 JK3302 JK3303 Replace L5402 L5403 L5404 L5405 N N Y Y Y Y ...

Page 24: ... IC RF DVB T C H N TU SIF Pro idiom RS 232C A V Demod Ext SPK AMP 51P L 51P R HDMI1 Full Scart Video RGB Audio Video Audio Wi Fi M Remote Speaker I2S Out Audio AMP HDCP EEPROM PHY Chip IR Key AUX LAN L R Rear TCON Block NEC Sub Micom CLOCK Display CI Slot TS CI_Common CI_Parallel_ IN URAT SC_ID FB DTV MNT_Vout Audio out ID FB Video Audio out Ext Speaker R L Vol Ext Speaker L R OUT Vol Control CI_P...

Page 25: ...W Many electrical and mechanical parts in this chassis have special safety related characteristics 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 X RADIATION Shock Fire or other Hazards Do not modify the original design without permission of...

Page 26: ... ORESET AM22 OIRI AU21 FSRC_WR D27 STB_SCL AT21 STB_SDA AR21 DEMOD_RST T34 DEMOD_TSCLK T32 DEMOD_TSDATA0 T36 DEMOD_TSDATA1 U36 DEMOD_TSDATA2 T33 DEMOD_TSDATA3 T30 DEMOD_TSDATA4 V33 DEMOD_TSDATA5 V32 DEMOD_TSDATA6 V31 DEMOD_TSDATA7 V30 DEMOD_TSSYNC T35 DEMOD_TSVAL T31 CI_INT N36 CI_TSCLK T37 CI_TSDATA0 R35 CI_TSSYNC R37 CI_TSVAL R36 PVR_TSCLK R34 PVR_TSVAL R32 PVR_TSSYNC R33 PVR_TSDATA0 P33 PVR_TSD...

Page 27: ...12_PCIE11 W30 PCIE11_REFCKN W36 PCIE11_REFCKP W37 HDMI_0_RX_0 AG35 HDMI_0_RX_0B AG34 HDMI_0_RX_1 AG37 HDMI_0_RX_1B AG36 HDMI_0_RX_2 AF35 HDMI_0_RX_2B AF34 HDMI_0_RX_C AH35 HDMI_0_RX_CB AH34 HDMI_1_RX_0 AE37 HDMI_1_RX_0B AE36 HDMI_1_RX_1 AD35 HDMI_1_RX_1B AD34 HDMI_1_RX_2 AC35 HDMI_1_RX_2B AC34 HDMI_1_RX_C AE35 HDMI_1_RX_CB AE34 HDMI_2_RX_0 AB35 HDMI_2_RX_0B AB34 HDMI_2_RX_1 AA35 HDMI_2_RX_1B AA34 ...

Page 28: ... U20 DVSS_92 V20 DVSS_104 W20 DVSS_117 Y20 DVSS_127 AA20 DVSS_137 AB20 DVSS_29 G16 DVSS_63 R21 DVSS_74 T21 DVSS_84 U21 DVSS_93 V21 DVSS_105 W21 DVSS_118 Y21 DVSS_128 AA21 DVSS_138 AB21 DVSS_64 R22 DVSS_75 T22 DVSS_85 U22 DVSS_94 V22 DVSS_106 W22 DVSS_119 Y22 DVSS_129 AA22 DVSS_139 AB22 DVSS_65 R23 DVSS_76 T23 DVSS_86 U23 DVSS_140 AB23 DVSS_96 W6 DVSS_30 G17 DVSS_27 F25 DVSS_109 Y6 DVSS_17 E21 DVSS...

Page 29: ..._R_IN_SOC R620 100 R613 10K R616 75 1 SCART_ROUT_SOC SC_B SC_R SCART_Rout R618 15K DTV MNT_V_OUT_SOC R605 75 1 TU_CVBS R608 75 1 C612 0 01uF SC_COM_SOC SC_CVBS_IN_IF SC_L_IN SCART_LOUT_SOC R623 100 DTV MNT_V_OUT SC_G_SOC R619 15K C610 10uF 16V C611 10uF 16V R600 0 TP600 R627 330pF 50V R603 330pF 50V R611 120 ohm C607 100pF C608 100pF 50V OPT C609 100pF 50V OPT SCART_AMP_R_FB SCART_AMP_L_FB R635 10...

Page 30: ...6 B8 DQU7 A3 VREFCA M8 VREFDQ H1 ZQ L8 VDD_1 B2 VDD_2 D9 VDD_3 G7 VDD_4 K2 VDD_5 K8 VDD_6 N1 VDD_7 N9 VDD_8 R1 VDD_9 R9 VDDQ_1 A1 VDDQ_2 A8 VDDQ_3 C1 VDDQ_4 C9 VDDQ_5 D2 VDDQ_6 E9 VDDQ_7 F1 VDDQ_8 H2 VDDQ_9 H9 NC_1 J1 NC_2 J9 NC_3 L1 NC_4 L9 NC_6 T7 VSS_1 A9 VSS_2 B3 VSS_3 E1 VSS_4 G8 VSS_5 J2 VSS_6 J8 VSS_7 M1 VSS_8 M9 VSS_9 P1 VSS_10 P9 VSS_11 T1 VSS_12 T9 VSSQ_1 B1 VSSQ_2 B9 VSSQ_3 D1 VSSQ_4 D8...

Page 31: ...47 AR903 47 CI_A_ADDR 8 PCM_IOWR CI_TS_CLK R929 10K CI_IN_TS_SYNC CI_A_ADDR 7 5V_CI_ON CI_A_ADDR 2 CI_A_ADDR 10 PCM_OE R912 22 CI_CD2 R923 10K OPT CI_TS_DATA 0 CI_CD1 PCM_RST R938 0 OPT CI_A_ADDR 0 C905 10uF 10V C904 0 1uF R940 22 CI_CD1 R922 22 PCM_INPACK PCM_CE1 R936 10K CI_A_ADDR 5 R928 100 CI_A_ADDR 14 CI_TS_DATA 1 R921 22 R924 10K OPT CI_A_DATA 0 7 R941 22 C907 0 1uF 16V CI_CD2 CI_MDI 0 7 CI_...

Page 32: ...V POWER_ON OFF2_3 C24001 0 1uF 16V 1 2V_MTK_CORE C2404 0 1uF 16V C2402 10uF 16V L2400 BLM18PG121SN1D R2406 10K 1 C2409 10uF 10V R24000 OPT C2407 10uF 10V IC2400 AOZ1038PI 3 AGND 2 VIN 4 FB 1 PGND 5 COMP 6 EN 7 NC_1 8 NC_2 9 EP LX 12V POWER_ON OFF1 C2441 3300pF 50V OPT C2403 0 1uF 16V OPT C2400 10uF 16V R2403 10K R2402 3 3K C2408 10uF 10V L2404 2uH R2404 5 6K 1 C2405 4700pF 50V C2414 10uF 10V C2421...

Page 33: ... C3301 0 1uF 16V R3394 10K HDMI_EXT_EDID R3389 10K HDMI_EXT_EDID R3395 22K HDMI_EXT_EDID EDID_WP2 IC3304 M24C02 RMN6T HDMI_EXT_EDID 3 E2 2 E1 4 VSS 1 E0 5 SDA 6 SCL 7 WC 8 VCC R3396 100K HDMI_EXT_EDID EDID_WP3 R3326 47K R3397 10K HDMI_EXT_EDID EDID_WP1 C3302 0 1uF 16V R3340 47K 5V_NORMAL R3319 22 HDMI_EXT_EDID R3379 22 HDMI_EXT_EDID R3380 22 HDMI_EXT_EDID IC3306 M24C02 RMN6T HDMI_EXT_EDID 3 E2 2 E...

Page 34: ...GND 6 RED_GND 7 GREEN_GND 8 BLUE_GND 9 NC 10 SYNC_GND 11 GND_2 12 DDC_DATA 13 H_SYNC 14 V_SYNC 15 DDC_CLOCK 16 SHILED CLK_COM2 CLK_DATA7 CLK_COM4 CLK_COM3 CLK_DATA2 CLK_COM1 HP_ROUT HP_DET R3601 10K HP_OUT HP_LOUT JK3605 KJA PH 0 0177 EAG61030001 HP_OUT 3 DETECT 4 L 5 GND 1 R D3601 5 6V OPT 3 3V_NORMAL JK3602 JST1223 001 1 GND 2 VCC 3 VINPUT 4 FIX_POLE R3635 470 R3634 470 R3633 470 R3632 470 R3631...

Page 35: ... VCC 3 5V_ST EEPROM_SW SDA_NVRAM SCL_NVRAM I2C_SDA5 NEC_EEPROM_SDA NEC_EEPROM_SCL I2C_SCL5 3 5V_ST D3803 50V BAP70 02 R3834 1K R3849 3 6K R3851 3 6K R3844 4 7K R3845 4 7K 3 5V_ST 3 5V_ST 3 3V_NORMAL 3 3V_NORMAL IC3812 NLASB3157DFT2G EAN38256201 ANALOG SWITCH ON SEMICONDUCTOR 3 B0 2 GND 4 A 1 B1 6 SELECT 5 VCC MTK_DBG_TX RS232_TX C3811 0 1uF 3 5V_ST UART_SW1 NEC_TX3 C3822 0 1uF R3866 0 OLD_UART IC3...

Page 36: ... R4135 30K 5V_ST R4148 10K R4147 10K R4137 22 IR_OUT_HDMI2 R4129 22 IR_OUT_HDMI3 R4117 10K 1 3 5V_ST R4118 10K 1 R4107 47K OPT R4130 10K R4134 10K R4138 10K R4142 10K Q4102 2SC3052 E B C Q4103 2SC3052 E B C Q4105 2SC3052 E B C Q4107 2SC3052 E B C Q4108 2SC3052 E B C Q4106 2SC3052 E B C Q4104 2SC3052 E B C P4101 12507WR 08L 1 GND 2 KEY1 3 KEY2 4 3 5V_ST 5 GND 6 LOGO LED_R 7 IR 8 GND 9 D4100 5 6V OP...

Page 37: ...FF2_4 IC4306 TPS2554 3 IN_2 2 IN_1 4 ILIM_SEL 1 GND 5 EN 6 ILIM1 7 ILIM0 8 OUT_1 9 OUT_2 10 FAULT 11 EP USB_DM1 L4301 BLM18PG121SN1D R4313 27K 1 10W OPT R4311 10K OPT C4326 0 1uF 50V 5V_USB L4305 BLM18PG121SN1D R4323 10K R4341 27K 1 10W OPT R4329 10K C4302 10uF 10V P4301 SMAW200 H12S2 1 2 3 4 5 6 7 8 9 10 11 12 13 JK4304 3AU04S 305 ZC LG 1 2 3 4 5 JK4303 3AU04S 305 ZC LG 1 2 3 4 5 Q4301 PMV48XP G ...

Page 38: ..._R_OUT 2 AUDIO_R_IN 3 AUDIO_L_OUT 4 AUDIO_GND 5 B_GND 6 AUDIO_L_IN 7 B_OUT 8 ID 9 G_GND 10 D2B_IN 11 G_OUT 12 D2B_OUT 13 R_GND 14 RGB_GND 15 R_OUT 16 RGB_IO 17 SYNC_GND1 18 SYNC_GND2 19 SYNC_OUT 20 SYNC_IN 21 COM_GND 22 AV_DET SCART_Lout C4611 0 1uF 50V R4613 2 2K C4610 33pF C4614 1uF 25V DTV MNT_L_OUT C4612 33pF L4602 R4611 33K R4610 33K R4608 2 2K SCART_AMP_L_FB 12V SCART_Rout SCART_AMP_R_FB C46...

Page 39: ...4V_AMP C5403 1000pF 50V R5408 12 R5410 12 R5413 12 C5440 0 01uF 50V C5428 1uF 25V R5400 10K C5405 10uF 10V MAIN_AMP_RESET 0 1uF C5439 50V R5407 12 24V_AMP R5414 12 R5412 12 L5404 NRS6045T100MMGK 10 0uH L5403 NRS6045T100MMGK 10 0uH 0 1uF C5413 16V P5400 WAFER ANGLE 1 2 3 4 C5427 1uF 25V 3 3V_NORMAL C5430 390pF 50V 0 1uF C5436 50V C5424 0 01uF 50V OPT C5410 10uF 10V OPT C5406 33pF 50V R5401 10K I2C_...

Page 40: ...LM18PG121SN1D HP_ROUT_MAIN HP_LOUT_MAIN R6106 43K 1 C6107 0 1uF 16V HP_LOUT_AMP C6100 1uF 10V R6102 33K R6104 43K 1 HP_ROUT_AMP C6103 1uF 10V C6102 1uF 10V C6101 1uF 10V C6108 10pF 50V C6104 180pF R6103 33K IC6100 TPA6138A2 3 OUTR 2 INR 4 GND_1 1 INR 6 VSS 5 MUTE 7 CN 8 CP 9 VDD 10 GND_2 11 UVP 12 OUTL 13 INL 14 INL R6105 4 7K C6109 180pF R6101 10K 3 3V_NORMAL R6103 1 36K HP_36K R6102 1 36K HP_36K...

Page 41: ... 3V_TU C6510 0 1uF 16V TU_RESET 3 3V_TU C6511 0 1uF 16V R6511 100K OPT R6506 100 IF_AGC C6507 0 1uF 16V R6505 100 IF_N IF_P 1 8V_TU L6503 BLM18PG121SN1D C6525 100pF 50V C6527 0 1uF 16V C6526 0 1uF 16V 3 3V_TU C6523 10uF 10V IC6501 AZ1117BH 1 8TRE1 1 ADJ GND 2 OUT 3 IN C6524 0 1uF 16V 1 8V_TU L6501 BLM18PG121SN1D TU6500 TDSS G101D B 5 3 3V 11 DIF N 2 RESET 10 DIF P 4 SDA 1 NC 9 IF_AGC 8 CVBS 3 SCL ...

Page 42: ...705 100V 1N4148W CLK4_I C7729 1000pF 50V OPT DISCHG VCOM_P C7722 10uF 16V Vcore VGH_F CLK6 VCOM_N C7757 1uF 50V VDD C7737 0 1uF 50V R7729 2 7K 1 16W CLK4 C7702 0 01uF 50V R7741 0 1 16W OPT CLK5_I MCLK VDD GMA16 GST CLK1 R7744 20K 1 10W 5 VST RE CTRLP GST_SOC VGL VDD TXB1P R7749 1K 1 16W OPT C7708 10uF 10V OPT VCOM_P C7707 10uF 10V OPT VGH_FB R7731 100 1 16W 1 PANEL_VCC VCOM R7747 0 1 16W OPT L7703...

Page 43: ...2 A2 NC_5 A8 NC_6 A9 NC_7 A10 NC_8 A11 NC_9 A12 NC_10 A13 NC_11 A14 NC_12 B1 NC_13 B7 NC_14 B8 NC_15 B9 NC_16 B10 NC_17 B11 NC_18 B12 NC_19 B13 NC_20 B14 NC_21 C1 NC_22 C3 NC_24 C7 NC_25 C8 NC_26 C9 NC_27 C10 NC_28 C11 NC_29 C12 NC_30 C13 NC_31 C14 NC_32 D1 NC_33 D2 NC_34 D3 NC_35 D4 NC_36 D12 NC_37 D13 NC_38 D14 NC_39 E1 NC_40 E2 NC_41 E3 NC_46 E12 NC_47 E13 NC_48 E14 NC_49 F1 NC_50 F2 NC_51 F3 N...

Page 44: ...R8458 1 5K GYSPD R8416 49 9 ETNHUB_AVDD18 ETNHUB_AVDD33 R8419 49 9 C8417 0 1uF EPHY_TDN ETNHUB_EPHY_TXOP0 R8448 1K OPT C8414 0 1uF R8446 1K OPT C8445 0 1uF TR0N ETNHUB_EPHY_TXON0 3 5V_ST R8456 1K OPT ETNHUB_EPHY_TXON0 ETNHUB_EPHY_RXIP2 LAN_ACT2 ETNHUB_AVDD33 X8400 25MHz C8443 0 1uF L8408 CIS21J121 SS_OLD ETNHUB_DVDD18 C8447 0 1uF IC8400 MP20045DQ LF Z 3 VOUT_1 2 VIN_2 4 VOUT_2 1 VIN_1 5 FB 6 GND 7...

Page 45: ...8613 1uF 50V IC8600 TPA3124D2PWPR 3 PVCCL_2 2 SD 4 MUTE 1 PVCCL_1 6 RIN 5 LIN 7 BYPASS 8 AGND_1 9 AGND_2 10 PVCCR_1 11 VCLAMP 12 PVCCR_2 13 PGNDR_1 14 PGNDR_2 15 ROUT 16 BSR 17 GAIN1 18 GAIN0 19 AVCC_1 20 AVCC_2 21 BSL 22 LOUT 23 PGNDL_1 24 PGNDL_2 R8601 10K OPT EXT_OUT_L C8619 100pF 50V OPT R8607 10K EXT_OUT_L R8608 4 7K R8609 4 7K 3 3V_NORMAL R8602 10K JK8600 PEJ027 04 6B T_TERMINAL2 7B B_TERMIN...

Page 46: ... NC_4 3 5V_ST IC8700 NEC_MICOM 1 P60 SCL0 2 P61 SDA0 3 P62 4 P63 5 P31 TI03 TO03 INTP4 6 P64 RD 7 P65 WR0 8 P66 WR1 9 P67 ASTB 10 P77 EX23 KR7 INTP11 11 P76 EX22 KR6 INTP10 12 P75 EX21 KR5 INTP9 13 P74 EX20 KR4 INTP8 14 P73 EX19 KR3 15 P72 EX18 KR2 16 P71 EX17 KR1 17 P70 EX16 KR0 18 P06 WAIT 19 P05 CLKOUT 20 EVSS1 21 P80 EX0 22 P81 EX1 23 P82 EX2 24 P83 EX3 25 P84 EX4 26 P85 EX5 27 P86 EX6 28 P87 ...

Page 47: ...uF ETNHUB_EPHY_RXIN3 R9038 4 7K C9007 0 1uF 16V R9067 4 7K OPT R9051 49 9 1 ETNHUB_DVDD33 C9004 0 1uF 16V C9021 0 1uF 16V C9014 0 1uF 16V 3 5V_ST_LAN C9000 0 1uF 16V R9052 49 9 1 R9012 4 7K Q9001 MMBT3904 NXP E B C R9053 49 9 1 C9002 0 1uF 16V C9015 0 1uF R9039 49 9 1 ETNHUB_EPHY_RXIP3 Q9003 2SC3052 E B C C9003 12pF 50V Xtal_matching C9003 1 15pF 50V Xtal_Old LAN_DVDD33 L9002 BLM18PG121SN1D C9025 ...

Page 48: ...L9101 CB3216PA501E IC9103 TPS54327DDAR 3 VREG5 2 VFB 4 SS 1 EN 5 GND 6 SW 7 VBST 8 VIN 9 EP GND EXT12V_CTRL L9104 3 6uH NR8040T3R6N C9109 0 1uF 50V C9108 1uF 10V C9111 10uF 25V IC9101 MP5000DQ 3 ENABLE FAULT 2 DV DT 4 I LIMIT 1 GND 5 NC 6 SOURCE_1 7 SOURCE_2 8 SOURCE_3 9 SOURCE_4 10 SOURCE_5 11 VCC EXT_5V C9112 100pF L9102 BLM18PG121SN1D C9105 470pF 50V P_12V C9107 0 1uF 50V R9108 200 C9115 3300pF...

Page 49: ...L14 IO3_16 L15 IO3_17 L16 IO3_18 K16 IO3_19 K15 IO3_20 J16 IO3_21 H16 CLK3 G16 CLK2 H12 IO3_22 G14 IO3_23 G13 IO3_24 G15 IO3_25 F16 IO3_26 F14 IO3_27 F13 IO3_28 F15 IO3_29 E16 IO3_30 E15 IO3_31 D16 IO3_32 D15 IO3_33 F12 IO3_35 E13 IO3_36 H13 IO3_38 G12 IO3_39 B16 IO3_40 C15 IO3_41 C14 IO3_42 D13 IO3_43 B15 IO2_1 A15 IO2_2 B14 IO2_3 C13 IO2_4 B13 IO2_5 A13 IO2_6 B12 IO2_7 A2 IO2_47 E12 IO2_9 E11 IO...

Page 50: ......

Search results

Summary of Contents for Centric 42LY750H

Reviews:

Related manuals for Centric 42LY750H

Brands by name

Popular brands

LG Centric 42LY750H, Service Manual

Search results

Summary of Contents for Centric 42LY750H

Reviews:

Related manuals for Centric 42LY750H

Brands by name

Popular brands