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LG 32LF550U, Service Manual

The LG 32LF550U is a top-notch television that guarantees an immersive viewing experience. To enhance your understanding and make the most of its advanced features, we provide a comprehensive service manual, available for free download at manualshive.com. Access it anytime to unlock the full potential of your LG 32LF550U.

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THERMAL

THERMAL

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

POWER

140826

4

L14_CA

Q403
MMBT3904(NXP)

TR_NXP

E

B

C

PANEL_VCC

Q400
MMBT3904(NXP)

TR_NXP

E

B

C

R401

10K

OPT

R442

10K

Q404
MMBT3904(NXP)

TR_NXP

E

B

C

R441

10K

+3.5V_ST

R448
2.2K

R444
10K

+13.2V

R400

10K

+3.5V_ST

R435
100K

L410

BLM18PG121SN1D

POWER_ON/OFF_1

POWER_DET

RL_ON

+3.3V_Normal

+13.2V

C429

0.1uF

16V

PANEL_CTL

R443

10K

R406

10K

+3.5V_ST

POWER_DET_RESET

C425

0.1uF

25V

OPT

C422

0.1uF

16V

R451
5.6K

R404
4.7K

R402

10K

R452
5.6K

R412

33K

OPT

Q401

MMBT3906(NXP) 

TR_NXP

1

2

3

R454

100

C430
22uF
10V

C428
2.2uF

10V

ZD402

5V

TVS_SEMTECH

L408

UBW2012-121F

120OHM

L409

BLM18PG121SN1D

+3.3V_Normal

L411

CB2012PK501T

10uF

C426

10V

+1.5V_DDR

10uF

C431

10V

ZD403

2.5V

ZD404

5V

TVS_SEMTECH

R447
22K

R449
1K
1/16W
1%

R450

200

1/16W

1%

IC404

AZ1117EH-ADJTRG1 

ADJ/GND

OUT

IN

R453

0

L412

BLM18PG121SN1D

R471

22K

1/16W

1%

C441
1uF
10V

R470

10K

R469

68K

1/16W

1%

C443

0.1uF

16V

C440

100pF

50V

ZD405

5V

TVS_SEMTECH

+3.5V_ST

+13.2V

C439

0.1uF

25V

C442

2200pF

50V

C415

0.1uF

25V

R419

100

R426
10K

L403

MLB-201209-0120P-N2

R420

1K

Q402
MMBT3904(NXP)

TR_NXP

E

B

C

A13.2V

+3.3V_Normal

L414

OPT

+13.2V

R425

10K

INV_CTL

+3.5V_ST

PWM1

R467

1K

OPT

R424
3.9K

PWM_DIM

C402

0.1uF

25V

L415

MLB-201209-0120P-N2

C438
10uF

25V

C433

4.7uF

50V

OPT

Q405

SSM3J332R 

S

G

D

Q406
SSM3J332R 

FET_TOSHIBA

S

G

D

+3.5V_ST

R438
4.7K

OPT

C423
22uF
16V

C432

1uF
16V

C403

4700pF

50V

OPT

+5V_Normal

+5V_USB

USB1_CTL

USB1_OCD

R422

15K

C418

47pF
50V

C404

4700pF

50V

OPT

+5V_Normal

ZD401

2.5V

+1.10V_VDDC

C408

2200pF

50V

OPT

C417

3300pF

50V

C405
10uF
25V

C421

0.047uF

25V

L404

CB2012PK501T

C409

2200pF

50V

OPT

C416

22pF

50V

C411
82pF
50V

OPT

C424
22uF
16V

+13.2V

R403

10K

C419

22pF

50V

C412
10uF

6.3V

OPT

C406
10uF
25V

+3.3V_Normal

C410

0.047uF

25V

+3.3V_Normal

C420

3300pF

50V

R408
100K

C407

1uF
10V

R407
4.7K

OPT

R409

91K

+5V_Normal

L413

2uH

L405

4.7uH

L406

4.7uH

ZD402-*1

TVS_KEC

ZD404-*1

TVS_KEC

ZD405-*1

TVS_KEC

IC401

KIC7529M2 

RESET_IC_KEC

1

GND

2

OUT

3

VCC

Q401-*1

2N3906S-RTK

TR_KEC

E

B

C

Q400-*1
2N3904S

TR_KEC

E

B

C

Q402-*1
2N3904S

TR_KEC

E

B

C

Q403-*1
2N3904S

TR_KEC

E

B

C

Q404-*1
2N3904S

TR_KEC

E

B

C

C446

0.1uF

25V

+3.3V_Normal

R405

10K

R418

20K

R414

10K

C444
22uF

10V

C445
22uF

10V

C413
22uF

10V

C414
22uF

10V

ZD406

5.1v

OPT

ZD407

5.1v

OPT

R468

6.8K

1/16W

1%

R445

33K

R446
120K

Q406-*1

AO3435

FET_AOS

G

D

S

C427
0.22uF
25V

NON_60_SHARP

IC401-*1

APX803E29

RESET_IC_DIODES

1

GND

2

RESET

3

VCC

R411

4.7K

1%

R413

5.1K

1%

SN1406035RGER 

IC400

1

SS2

3

EN2

7

SW_OUT

9

VIN2

10

PGND2

11

LX2

12

BST2

13

COMP2

14

FB2

15

RSET

16

AGND

17

FB1

18

COMP1

19

BST1

20

LX1

21

PGND1

22

VIN1

23

V7V

24

SS1

5

SW_EN

8

SW_IN

6

NFAULT

4

ROSC/SYNC

2

EN1

25

[EP]

P401

SMAW200-H12S5K(BK)(LTR) 

9

GND

4

D13.2V

8

A13.2V

3

GND

12

PDIM#1

7

A13.2V

2

PDIM#2

11

DRV_ON

6

D13.2V

1

PWR_ON

10

GND

5

D13.2V

13

R417

39K

1%

R416

5.1K

1%

R415

0

5%

IC405

BD9D321EFJ

3

VREG

2

FB

4

SS

1

EN

5

GND

6

SW

7

BOOT

8

VIN

9

[EP]

R472
3.3K

USB1_CTL_Pull_Down

R430

14K

1%

R431

5.6K

1%

C427-*1
0.1uF
50V

60_SHARP

R473
30K

OPT

R474
30K

OPT

R475
30K

OPT

+13.2V to PANEL_VCC

+3.5V_ST to +3.3V_Normal

+3.5V_Normal to +1.5V_DDR

+13.2V POWER_DET

FROM POWER B/D 13.2V

POWER

R2

R1

1.3A

Vout=1.25*(1+R2/R1)+Iadj*R2

+13.2V to +3.5V_STANDBY

R2

Vout=0.765*(1+R1/R2)

R1

3A

Vout=0.6(R1/R2)+0.6

+5V_Normal & +1.10V_VDDC

R2

R1

Vout=0.6(R1/R2)+0.6

R1

R2

Check the pull down
when AC Power On with HDD

Copyright © 2015 LG Electronics. Inc. All rights reserved. 

Only for training and service purposes

LGE Internal Use Only

Summary of Contents for 32LF550U

Page 1: ...50U 32LF550U ZA 32LF551C 32LF551C 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: ...ights reserved Only for training and service purposes CONTENTS CONTENTS 2 SAFETY PRECAUTIONS 3 SERVICING PRECAUTIONS 4 SPECIFICATION 6 ADJUSTMENT INSTRUCTION 11 BLOCK DIAGRAM 17 EXPLODED VIEW 21 SCHEMATIC CIRCUIT DIAGRAM APPENDIX TROUBLE SHOOTING GUIDE APPENDIX ...

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: ...UK Italy Germany France Spain Sweden Finland Neth erlands Belgium Luxemburg Greece Denmark Czech Austria Hungary Swiss Croatia TurkeyNorway Slovenia Poland Ukraine Portugal Ireland Morocco Latvia Estonia Lithania Rumania Bulgaria Russia SlovakiaBosnia Serbia Albania Kazakhstan Belarus DTV MPEG2 4 DVB T2 8 countries UK Denmark Sweden Finland Norway Ireland Ukraine Kazakhstan DTV MPEG2 4 DVB C 37 co...

Page 7: ...Modulation 16QAM 64 QAM 128 QAM and 256 QAM DVB S S2 symbolrate DVB S2 8PSK QPSK 2 45Msymbol s DVB S QPSK 2 45Msymbol s viterbi DVB S mode 1 2 2 3 3 4 5 6 7 8 DVB S2 mode 1 2 2 3 3 4 3 5 4 5 5 6 8 9 9 10 4 Scart Jack 1EA PAL SECAM Scart 1 Jack is Full scart and support RF OUT analog EU only 5 Component AV Common port 1EA Video Input RCA PAL SECAM NTSC 4 System PAL SECAM NTSC PAL60 Component Input ...

Page 8: ... 50 60 00 27 027 SDTV 480P 6 720 480 31 47 59 94 27 00 SDTV 480P 7 1280 720 37 50 50 00 74 25 HDTV 720P 8 1280 720 45 00 60 00 74 25 HDTV 720P 9 1280 720 44 96 59 94 74 176 HDTV 720P 10 1920 1080 28 12 50 00 74 25 HDTV 1080I 11 1920 1080 33 75 60 00 74 25 HDTV 1080I 12 1920 1080 33 72 59 94 74 176 HDTV 1080I 13 1920 1080 56 25 50 00 148 50 HDTV 1080P 14 1920 1080 67 50 60 00 148 50 HDTV 1080P 15 1...

Page 9: ...V 1080P O FHD only DTV 1 640 480 31 46 59 94 25 125 SDTV 480P 2 640 480 31 50 60 00 25 125 SDTV 480P 3 720 480 31 47 59 94 27 00 SDTV 480P 4 720 480 31 50 60 00 27 027 SDTV 480P 5 720 576 31 25 50 00 27 00 SDTV 576P DVB 6 1280 720 37 50 50 00 74 25 HDTV 720P DVB 7 1280 720 45 00 60 00 74 25 HDTV 720P 8 1280 720 44 96 59 94 74 176 HDTV 720P 9 1920 1080 28 12 50 00 74 25 HDTV 1080I DVB 10 1920 1080 ...

Page 10: ... HDTV 1080P Side by Side half Top and Bottom 8 1920 1080 33 70 30 89 1 HDTV 1080P Side by Side half Top and Bottom 9 1920 1080 53 95 54 23 98 24 148 35 148 5 HDTV 1080P Frame packing 10 1920 1080 56 30 50 148 5 HDTV 1080P Side by Side half Top and bottom Single frame sequential 11 1920 1080 67 50 60 148 5 HDTV 1080P Side by Side half Top and bottom Single frame sequential 6 2 DTV Input No Resoluti...

Page 11: ...nnection between computer jig and set 5 Click Auto tab and set as below 6 Click Run 7 After downloading check OK message USB DOWNLOAD 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 is Low it didn t work But your downloaded version is High USB data is automatically detecting 3 Show the message Copying files fr...

Page 12: ... adjustment The use of a internal pattern MODEL Tool Option1 Tool Option2 Tool Option3 Tool Option4 Tool Option5 Tool Option6 SHARP 3111 455 2752 34144 518 2320 LGD 39 455 2752 34144 1538 2320 0 1 2 3 4 5 6 7 8 9 A B C D E F 00 00 FF FF FF FF FF FF 00 1E 6D a b 10 c 01 03 80 A0 5A 78 0A EE 91 A3 54 4C 99 26 20 0F 50 54 A1 08 00 31 40 45 40 61 40 71 40 01 01 30 01 01 01 01 01 01 66 21 50 B0 51 00 1...

Page 13: ...0 it is the FULL Dynamic Range of Module Mode Temp Coordinate spec Target Cool 13 000 K X 0 271 0 002 Y 0 270 0 002 X 0 278 Y 0 280 Medium 9 300 K X 0 286 0 002 Y 0 289 0 002 X 0 293 Y 0 299 Warm 6 500 K X 0 313 0 002 Y 0 329 0 002 X 0 320 Y 0 339 Aging time Min Cool Medium Warm x y x y x y 271 270 286 289 313 329 1 0 2 282 289 297 308 324 348 2 3 5 281 287 296 306 323 346 3 6 9 279 284 294 303 32...

Page 14: ... Adjust x value by decreasing the G After you finished all adjustments Press In start key and compare Tool option and Area option value with its BOM if it is correctly same then unplug the AC cable If it is not same then correct it same with BOM and unplug AC cable For correct it to the model s module from factory Jig model Push the IN STOP key after completing the function inspection And Mechanic...

Page 15: ...F ADL EEPROM Sub Address low 00 FF Data Write data CS CMD LENGTH ADH ADL Data_1 Data_n Delay 20ms 6 2 Command Set Description FOS Default write 7mode data write Vtotal V_Frequency Sync_Polarity Htotal Hstart Vstart 0 Phase Data write Model Name and Serial Number write in EEPROM 6 3 Method notice 1 Serial number D L is using of scan equipment 2 Setting of scan equipment operated by Manufacturing Te...

Page 16: ...click 1 Push the 2 MAC Address write At success Download check the OK 3 Start CI Key Download Push the 4 Check the OK or NG 7 2 LAN Inspection 7 2 1 Equipment Condition Each other connection to LAN Port of IP Hub and Jig 7 2 2 LAN inspection solution LAN Port connection with PCB Network setting at MENU Mode of TV Setting automatic IP Setting state confirmation If automatic setting is finished you ...

Page 17: ...RXB4 RXBCK SPK_R SPK_L AMP_SCL SDA AUD_MASTER_CLK AUD_LRCH AUD_LRCK AUD_SCK TAS5733 IC5600 Connector P4600 Jog KEY LED_R IR HDMI1 JK800 SPDIF_OUT SPDIF Optic JK1001 except LF54 USB JK700 HDMI2 JK801 CK D0 D1 D2 _HDMI4 DM DP USB1_OCP CTL SN1406035RGER 5V_USB HP_L ROUT Headphone JK3000 Only LF62 57 56 DDR3 SDRAM IC1201 128MB B MDQL 0 7 B MDQU 0 7 NAND FLASH IC102 1Gbit H27U1G8F2CTR BC PCM_A 0 7 T4LC...

Page 18: ...RXA4 RXACK RXB0 RXB4 RXBCK SPK_R SPK_L AMP_SCL SDA AUD_MASTER_CLK AUD_LRCH AUD_LRCK AUD_SCK TAS5733 IC5600 Connector P4600 Jog KEY LED_R IR HDMI1 JK800 SPDIF_OUT SPDIF Optic JK1001 except LF54 USB JK700 HDMI2 JK801 CK D0 D1 D2 _HDMI4 DM DP USB1_OCP CTL SN1406035RGER 5V_USB HP_L ROUT Headphone JK3000 Only LF62 57 56 NAND FLASH IC102 1Gbit H27U1G8F2CTR BC PCM_A 0 7 T4LCX244FT Buffer TS_DATA 0 7 PCM_...

Page 19: ...D_MASTER_CLK AUD_LRCH AUD_LRCK AUD_SCK TAS5733 IC5600 Connector P4600 HDMI1 JK800 F SCART JK2801 SPDIF_OUT SPDIF Optic JK1001 except LF54 USB JK700 HDMI2 JK801 CK D0 D1 D2 _HDMI4 DM DP USB1_OCP CTL SN1406035RGER 5V_USB HP_L ROUT Headphone JK3000 Only LF62 57 56 NAND FLASH IC102 1Gbit H27U1G8F2CTR BC PCM_A 0 7 T4LCX244FT Buffer TS_DATA 0 7 PCM_DATA 0 7 EPHY_TP TN RP RN LAN JK2100 Only UK COMPONENT ...

Page 20: ...XB4 RXBCK SPK_R SPK_L AMP_SCL SDA AUD_MASTER_CLK AUD_LRCH AUD_LRCK AUD_SCK TAS5733 IC5600 Connector P4600 HDMI1 JK4200 F SCART JK2801 SPDIF_OUT SPDIF Optic JK1001 except LF54 USB JK700 HDMI2 JK4201 CK D0 D1 D2 _HDMI4 DM DP USB1_OCP CTL SN1406035RGER 5V_USB HP_L ROUT Headphone JK3000 Only LF62 57 56 NAND FLASH IC102 1Gbit H27U1G8F2CTR BC PCM_A 0 7 T4LCX244FT Buffer TS_DATA 0 7 PCM_DATA 0 7 COMPONEN...

Page 21: ...cal 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 Shock Fire or other Hazards Do not modify the original design without permission of manufacturer IMPORTANT SA...

Page 22: ...1 2 5V 1 10V_VDDC C408 2200pF 50V OPT C417 3300pF 50V C405 10uF 25V C421 0 047uF 25V L404 CB2012PK501T C409 2200pF 50V OPT C416 22pF 50V C411 82pF 50V OPT C424 22uF 16V 13 2V R403 10K C419 22pF 50V C412 10uF 6 3V OPT C406 10uF 25V 3 3V_Normal C410 0 047uF 25V 3 3V_Normal C420 3300pF 50V R408 100K C407 1uF 10V R407 4 7K OPT R409 91K 5V_Normal L413 2uH L405 4 7uH L406 4 7uH ZD402 1 TVS_KEC ZD404 1 T...

Page 23: ... MARK OF THE SCHEMETIC 2014 05 20 USB_S1 7 L14_CA_M1A JK700 3AU04S 305 ZC LG 1 2 3 4 5 D700 RCLAMP0502BA OPT SIDE_USB1_DM SIDE_USB1_DP C700 22uF 10V USB_HDD_CAP1_22uF ZD700 5V OPT SD05 C701 5pF 50V OPT C702 5pF 50V OPT C703 22uF 10V USB_HDD_CAP2_22uF 5V_USB C704 22uF 10V OPT C700 1 10uF 10V USB_HDD_CAP1_10uF C703 1 10uF 10V USB_HDD_CAP2_10uF R700 2 2 R701 2 2 USB SIDE Copyright 2015 LG Electronics...

Page 24: ... _HDMI4 R815 100 HDMI 2 C800 0 047uF 25V HDMI 2_MHL D2 _HDMI4 R802 1 8K D2 _HDMI2 R808 10K HDMI_CEC D0 _HDMI4 VA806 ESD_HDMI2 JK801 EAG62611204 HDMI 2 14 NC 13 CE_REMOTE 5 D1_GND 20 GND 12 CK 11 CK_GND 2 D2_GND 19 HP_DET 18 5V 10 CK 4 D1 1 D2 17 GND 9 D0 8 D0_GND 3 D2 16 DDC_DATA 7 D0 6 D1 15 DDC_CLK JK801 1 DAADR019A HDMI 2_EMI_FOOSUNG 14 RESERVED 13 CEC 5 TMDS_DATA1_SHIELD 20 BODY_SHIELD 12 TMDS...

Page 25: ...ONLY MANUFACTURES SPECIFIED PARTS BE USED FOR THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC SPDIF 2014 06 02 10 L14_CA_M1A 3 3V_Normal SPDIF_OUT JK1001 JST1223 001 SPDIF_OPTIC 1 GND 2 VCC 3 VINPUT 4 FIX_POLE C1001 1uF 10V OPT C1002 18pF 50V SPDIF_OPTIC SPDIF ESD Ready Copyright 2015 LG Electronics Inc All rights reserved Only for training and service purposes LGE Internal Use Only ...

Page 26: ..._5 E2 VSSQ_6 E8 VSSQ_7 F9 VSSQ_8 G1 VSSQ_9 G9 K4B2G1646Q BCK0 IC1201 2 DDR_1600_2G_SS EAN61848803 A0 N3 A1 P7 A2 P3 A3 N2 A4 P8 A5 P2 A6 R8 A7 R2 A8 T8 A9 R3 A10 AP L7 A11 R7 A12 BC N7 A13 T3 NC_5 M7 BA0 M2 BA1 N8 BA2 M3 CK J7 CK K7 CKE K9 CS L2 ODT K1 RAS J3 CAS K3 WE L3 RESET T2 DQSL F3 DQSL G3 DQSU C7 DQSU B7 DML E7 DMU D3 DQL0 E3 DQL1 F7 DQL2 F2 DQL3 F8 DQL4 H3 DQL5 H8 DQL6 G2 DQL7 H7 DQU0 D7 ...

Page 27: ...FLASH 140721 13 L14_CA_M1A SPI_SCK 3 5V_ST 3 5V_ST C1300 0 1uF 16V R1301 4 7K OPT SPI_CS SPI_SDO R1302 33 R1300 10K OPT SPI_SDI FLASH_WP 3 5V_ST IC1300 MX25L8035EM2I 10G SPI_FLASH_MACRONIX 3 WP SIO2 2 SO SIO1 4 GND 1 CS 5 SI SIO0 6 SCLK 7 NC SIO3 8 VCC IC1300 1 W25Q80DVSSIG SPI_FLASH_WINBOND 3 WP IO2 2 DO IO1 4 GND 1 CS 5 DI IO0 6 CLK 7 HOLD IO3 8 VCC Serial Flash for SPI boot Copyright 2015 LG El...

Page 28: ... 49 50 51 52 C1801 10uF 25V MO_FHD_VCC_CAP AR1800 0 1 16W MO_FHD_non_55CSOT RXB1 RXB0 RXA4 RXA1 Pol change RXB4 RXACK RXBCK RXA0 RXA2 RXA2 RXBCK RXB4 RXA3 RXA1 RXB2 RXB3 RXA3 RXBCK RXACK RXA2 RXA1 RXB1 RXB3 RXA3 RXA2 RXA0 RXA4 Shift RXBCK RXB2 RXA4 51Pin LVDS Connector For FHD 60Hz RXACK RXA3 RXACK RXB3 RXA3 RXA1 RXB0 RXA0 RXACK RXB3 LVDS_SEL RXA4 RXB3 RXA4 RXA2 RXA2 RXA1 RXB2 Pol change RXB4 RXB1...

Page 29: ...I_MISTRT AR1903 33 CI_MCLKI PCM_A 9 CI_TS_CLK C1901 0 1uF GND CI_ADDR 10 AR1907 33 AR1904 33 CI_IORD CI_TS_DATA 4 CI_MDI 5 CI_MDI 3 AR1900 33 R1911 10K R1913 10K PCM_REG R1919 10K PCM_RST AR1901 33 R1908 10K CI_MCLKI FE_TS_DATA 0 7 PCM_D 0 7 R1912 100 PCM_A 7 CI_MDI 1 PCM_A 10 CI_TS_VAL CI_MDI 4 R1918 100 CI_CD1 CI_WE AR1906 33 CI_TS_DATA 0 PCM_WAIT CI_MISTRT 3 3V_Normal 3 3V_Normal R1900 10K 5V_N...

Page 30: ...IFIED PARTS BE USED FOR THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC LAN 2014 05 21 21 L14_CA_M1A EPHY_RN EPHY_TN EPHY_TP EPHY_RP C2104 0 01uF 50V ETHERNET JK2100 RJ45VT 01SN002 ETHERNET 1 1 2 2 3 3 4 4 5 5 6 6 7 7 8 8 9 9 C2105 0 01uF 50V ETHERNET ETHERNET H W option ETHERNET Copyright 2015 LG Electronics Inc All rights reserved Only for training and service purposes LGE Internal U...

Page 31: ...04 33 LNB LNB_TX C2706 10uF 25V LNB M13 2V C2713 0 22uF 25V LNB L2701 BLM18PG121SN1D LNB LNB_OUT C2711 0 22uF 25V LNB DEMOD_SCL DEMOD_SDA C2701 18pF 50V LNB C2714 18pF 50V LNB C2702 33pF 50V LNB R2703 36K 1 16W 1 LNB R2706 0 D2703 30V SS23L LNB D2702 30V SS23L LNB L2702 15uH LNB LPH6050T 150M R IC2701 A8303SESTR T 4M LNB 1 VCP 3 NC_1 7 SCL 9 ADD 10 TONECTRL 11 TCAP 12 ISET 13 VREG 14 GND 15 VIN 16...

Page 32: ... 75 SCART_JACK R2808 75 SCART_JACK R2813 75 SCART_JACK AV2_L_IN R2847 0 AV2 SC1 AV2_CVBS_IN AV2_R_IN R2848 0 EU AV2_CVBS_DET AV2_L_IN_A AV2_R_IN_A AV2_CVBS_DET C2814 1000pF 50V SCART_JACK C2813 1000pF 50V SCART_JACK VA2816 5 6V OPT R2814 1K R2818 1K R2812 10K 3 3V_Normal R2810 10K COMP2_Y AV_CVBS_IN R2817 10K COMP2_DET D2801 1 ESD_COMP_ZENER_KEC 3 3V_Normal R2803 470K COMP2_Pr R2816 12K COMP2_R_IN...

Page 33: ...P_LOUT R3004 1K HEAD_PHONE HP_DET 3 5V_ST HP_ROUT SIDE_HP_MUTE R3002 1K HEAD_PHONE C3002 1000pF 50V OPT R3003 1K HEAD_PHONE Q3002 MMBT3904 NXP OPT E B C Q3003 MMBT3904 NXP OPT E B C Q3005 MMBT3904 NXP OPT E B C Q3004 MMBT3904 NXP OPT E B C Q3001 MMBT3906 NXP OPT E B C Q3000 MMBT3904 NXP OPT E B C R3000 1K OPT C3004 4 7uF 10V HEAD_PHONE L3001 HEAD_PHONE 5 6uH L3000 HEAD_PHONE 5 6uH C3005 4 7uF 10V ...

Page 34: ...GC R3723 3 3K T2_OR_CHINA R3738 TU_I2C_NON_FILTER 33 R3725 470 CHINA R3736 0 T2_OR_CHINA R3726 0 OPT R3734 22K 1 T2_OR_CHINA R3735 220 CHINA R3728 82 CHINA R3717 1K TU_NON_ATSC R3709 10 TU_NON_ATSC_NON_CHINA R3710 10 TU_NON_ATSC_NON_CHINA R3737 1 T2_OR_CHINA C2603 0 1uF 16V RF_SW_OPT R2603 0 RF_SW_OPT RF_SWITCH_CTL R3733 12K 1 T2_OR_CHINA C3725 1uF 10V T2_OR_CHINA R3707 0 LNB C3709 0 1uF 50V LNB T...

Page 35: ... BE USED FOR THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC RS232C_MSTAR_DEBUG_4P 2014 05 22 40 L14_CA_M1A PM_RXD 3 5V_ST P4000 12507WS 04L RS232C_DEBUG_4P 1 VCC 2 PM_RXD 3 GND 4 RM_TXD 5 GND PM_TXD JP_GND1 JP_GND3 JP_GND2 JP_GND4 AR4000 100 1 16W RS 232C 4PIN RS 232C 4PIN MSTAR DEBUG 4PIN Copyright 2015 LG Electronics Inc All rights reserved Only for training and service purposes LGE...

Page 36: ...C 2014 05 22 TP_EU 41 L14_CA_M1A CI_DET DDC_SCL_2 CI_CD1 SIDE_HP_MUTE HP_DET CK _HDMI2 SPDIF_OUT HDMI_ARC D0 _HDMI2 D1 _HDMI2 HP_ROUT D0 _HDMI2 HP_LOUT EPHY_RN EPHY_RP 5V_DET_HDMI_2 HPD2 EPHY_TP AV2_CVBS_DET D2 _HDMI2 EPHY_TN SENSOR_SDA FRC_RESET D1 _HDMI2 IF_AGC_SEL SENSOR_SCL D2 _HDMI2 CK _HDMI2 DEMOD_RESET DDC_SDA_2 CI_CD2 RF_SWITCH_CTL VBUS_EN UART_RX UART_TX TP for EU Copyright 2015 LG Electr...

Page 37: ...0 IR_Eye_Sensor R4600 3 3K R4607 1K IR_Eye_Sensor C4603 0 1uF 16V KEY1 3 5V_ST R4601 100 C4601 1000pF 50V KEY2 VA4600 OPT 5 6V R4604 10K 1 C4604 100pF 50V R4605 1K IR_Eye_Sensor SENSOR_SDA 3 3V_Normal P4601 12507WR 08L IR_8p 1 2 3 4 5 6 7 8 9 C4602 0 1uF 16V L4600 BLM18PG121SN1D C4605 18pF 50V IR_Eye_Sensor 3 5V_ST IR R4609 100 IR_Eye_Sensor 3 5V_ST R4606 1 8K SENSOR_SCL P4600 12507WR 10L IR_10p 1...

Page 38: ...PIO126 R16 PCMADR 4 NF_AD 4 GPIO104 U16 PCMADR 5 NF_AD 5 GPIO106 T17 PCMADR 6 NF_AD 6 GPIO107 W18 PCMADR 7 NF_AD 7 GPIO108 U20 PCMADR 8 GPIO113 Y19 PCMADR 9 GPIO115 AA19 PCMADR 10 GPIO119 AA20 PCMADR 11 GPIO117 W21 PCMADR 12 GPIO109 V20 PCMADR 13 GPIO112 Y17 PCMADR 14 GPIO111 V18 PCMCD_N GPIO135 V19 PCMCE_N GPIO120 W19 PCMDATA 0 GPIO131 U18 PCMDATA 1 GPIO132 V16 PCMDATA 2 GPIO133 W17 PCMDATA 3 GPI...

Page 39: ... AUL1 P2 AUL2 R2 AUL3 T1 AUR1 R3 AUR2 R1 AUR3 T3 AUOUTL0 U2 AUOUTR0 V3 AUVAG T2 CVBSOUT1 T6 CVBS0 V5 CVBS1 U5 CVBS2 T5 VCOM V4 I2S_OUT_BCK GPIO165 E4 I2S_OUT_MCK GPIO163 F4 I2S_OUT_SD GPIO166 F7 I2S_OUT_WS GPIO164 F5 USB0_DM C4 USB1_DM Y12 USB0_DP B4 USB1_DP AA12 BIN0M J2 BIN0P J3 GIN0M K3 GIN0P J1 RIN0M K2 RIN0P K1 HSYNC0 M6 VSYNC0 L6 BIN1M L2 BIN1P L3 GIN1M M1 GIN1P M2 RIN1M N1 RIN1P N3 SOGIN1 M...

Page 40: ...S 10 PLL_FLTM 11 PLL_FLTP 12 VR_ANA 13 AVDD 14 A_SEL_FAULT 15 MCLK 16 OSC_RES 17 DVSSO 18 VR_DIG 19 PDN 20 LRCLK 21 SCLK 22 SDIN 23 SDA 24 SCL 25 RESET 26 STEST 27 DVDD 28 DVSS 29 GND 30 AGND 31 VREG 32 GVDD_OUT 33 BST_D 34 PVDD_CD_1 35 PVDD_CD_2 36 OUT_D 37 PGND_CD_1 38 PGND_CD_2 39 OUT_C 40 NC_3 41 NC_4 42 BST_C 43 BST_B 44 NC_5 45 NC_6 46 OUT_B 47 PGND_AB_1 48 PGND_AB_2 49 EP C5614 0 1uF 16V 3 ...

Page 41: ...C7SZ08FU_TOSHIBA MHL_AND_GATE_TOSHIBA 3 GND 2 IN_A 4 OUT_Y 1 IN_B 5 VCC IC5801 1 74LVC1G08GW MHL_AND_GATE_NXP 3 2 4 1 5 AVDD5V_MHL 5V_HDMI_4 R5803 0 MHL_OCP R5802 10 5V_Normal IC5802 BD82020FVJ MHL_OCP 3 IN_2 2 IN_1 4 EN 1 GND 5 OC 6 OUT_1 7 OUT_2 8 OUT_3 R5804 10K MHL_OCP MHL_OCP_DET 3 3V_Normal C5802 0 1uF MHL_OCP R5805 100K OPT C5801 10uF 10V MHL_OCP MHL_5V_EN D5801 40V SS2040LL LG MHL_SUZHOU D...

Page 42: ......

Page 43: ...Trouble shooting guided Copyright 2015 LG Electronics Inc All rights reserved Only for training and service purposes LGE Internal Use Only ...

Page 44: ... viewing power auto on off 8 8 C Audio error No audio Normal video 9 9 Wrecked audio discontinuation noise 10 10 D Function error Remote control Local switch checking 11 11 External device recognition error 12 12 E Noise Circuit noise mechanical noise 13 13 F Exterior error Exterior defect 14 First of all Check whether there is SVC Bulletin in GCSC System for these model Contents of Standard Repai...

Page 45: ...ore replacing the Main Board Replace Main Board Re enter White Balance value Precaution Established date Standard Repair Process Revised date 1 14 Error symptom A Video error No video Normal audio A4 A1 A2 A6 A3 First of all Check whether all of cables between board is inserted properly or not Main B D Power B D LVDS Cable Speaker Cable IR B D Cable Normal Audio On Y N Normal Voltage Normal Voltag...

Page 46: ...B D Replace Power Board and repair parts Standard Repair Process A Video error No video No audio A4 Established date Revised date 2 14 End Normal Voltage Y N Error symptom Copyright 2015 LG Electronics Inc All rights reserved Only for training and service purposes LGE Internal Use Only ...

Page 47: ...er By using Diagnostics menu on OSD Menu Customer Support red button on remote control Signal Test Signal strength Normal over 50 Signal quality Normal over 50 Y Contact with signal distributor or broadcaster Cable or Air N N Y N A6 Standard Repair Process Established date Revised date 3 14 End Normal Signal Normal Picture Normal Picture Normal Picture SVC Bulletin End End Normal Picture Tuning fa...

Page 48: ...tting match with installed ANT N Y N A6 Standard Repair Process Established date Revised date 4 14 Check satellite setting Check LNB frequency Check satellite Check Satellite connection DiSEqC motor etc Contact with signal distributor or broadcaster Cable or Air N Check Tuner soldering Replace Main B D Normal Picture End Normal Picture Normal Setting SVC Bulletin Normal Signal End End Error sympto...

Page 49: ... B D Replace Main B D N N A Video error Color error A7 N Y Replace module Request repair for external device cable Check Test pattern A10 A8 A9 Standard Repair Process Established date Revised date 5 14 End Color error Color error External device Cable Normal External Input Component error HDMI error Error symptom External device Cable Normal Copyright 2015 LG Electronics Inc All rights reserved O...

Page 50: ...ce Main B D Check screen condition by input External Input Component HDMI DVI Request repair for external device Connect other external device and cable Check normal operation of External Input Component HDMI by connecting Jig pattern Generator Set top Box etc Replace Main B D N Y Check S W Version Y N S W Upgrade Y N Y N Replace Main B D Replace Module Established date Revised date 6 14 Standard ...

Page 51: ...each output of Power B D N Y Replace Main B D Y Replace Main B D N Y Check ST BY 3 5V Replace Power B D N Replace Power B D Y A11 A12 A13 A4 Standard Repair Process Established date Revised date 7 14 Stand By Red End Power LED On Normal Voltage Normal Voltage Normal Operati on Error symptom Copyright 2015 LG Electronics Inc All rights reserved Only for training and service purposes LGE Internal Us...

Page 52: ...f by OFF TIMER POWEROFF_SLEEPTIMER Power off by SLEEP TIMER POWEROFF_INSTOP Power off by INSTOP KEY POWEROFF_AUTOOFF Power off by AUTO OFF POWEROFF_ONTIMER Power off by ON TIMER POWEROFF_RS232C Power off by RS232C POWEROFF_RESREC Power off by Reservated Record POWEROFF_RECEND Power off by End of Recording POWEROFF_SWDOWN Power off by S W Download POWEROFF_UNKNOWN Power off by unknown status except...

Page 53: ...parts Check Speaker connection N Y Replace Speaker Replace Main Board C Audio error No audio Normal video A15 A16 Established date Revised date 9 14 Standard Repair Process End Normal Voltage TV Speaker Disconn ection Error symptom Copyright 2015 LG Electronics Inc All rights reserved Only for training and service purposes LGE Internal Use Only ...

Page 54: ...ovider Y Check audio Voltage 13 2V In case of External Input signal error Check and fix external device Replace Main B D N Established date Revised date 10 14 Standard Repair Process A16 End Signal Normal Normal Voltage Normal Audio Wrecked Audio Discontinuation Noise for all audio Wrecked Audio Discontinuation Noise only for D TV Wrecked Audio Discontinuation Noise only for Analog Wrecked Audio D...

Page 55: ...air Cable connection Connector solder Check 3 5V On Main B D A17 N N Check 13 2V on Power B D Replace Main B D Power B D don t have problem A4 Check IR Output signal N Y Repair Replace IR B D N A17 Replace Main B D Y A17 Standard Repair Process Established date Revised date 11 14 End Normal Operating Normal Voltage Normal Signal Normal Operating Normal Operating End Y Error symptom Copyright 2015 ...

Page 56: ...h technical information D Function error External device recognition error Established date Revised date 12 14 Standard Repair Process Signal Input Technical information External Input And Component Recognition error HDMI Optical Recognition error Error symptom Copyright 2015 LG Electronics Inc All rights reserved Only for training and service purposes LGE Internal Use Only ...

Page 57: ...els without any fix information provide the description OR Mechanical noise is a natural phenomenon and apply the 1st level description When the customer does not agree apply the process by stage Describe the basis of the description in Part related to nose in the Owner s Manual E Noise Circuit noise mechanical noise Established date Revised date 13 14 Standard Repair Process Circuit noise Mechani...

Page 58: ... stand F Exterior defect Exterior defect Established date Revised date 14 14 Standard Repair Process Module damage Cabinet damage Remote Controller damage Stand damage Error symptom Copyright 2015 LG Electronics Inc All rights reserved Only for training and service purposes LGE Internal Use Only ...

Page 59: ...nection diagram A7 10 Check Link Cable LVDS reconnection condition A8 A9 11 Adjustment Test pattern ADJ Key A10 12 13 A Video error_Vertical Horizontal bar residual image light spot Connection diagram A8 14 Check Link Cable LVDS reconnection condition A8 A9 15 Adjustment Test pattern ADJ Key A10 16 Appendix Defected Type caused by T Con Inverter Module Exchange T Con Board 1 A 1 5 17 Exchange T Co...

Page 60: ... Normal video Checking method in menu when there is no audio A15 29 Voltage and speaker checking method when there is no audio A16 30 C Audio error_Wrecked audio discontinuation Voltage and speaker checking method in case of audio error A16 31 D Function error_ No response in remote controller key error Remote controller operation checking method A17 Contents of Standard Repair Process Detail Tech...

Page 61: ...On with naked eye A Video error_No video Normal audio A1 Established date Revised date Error symptom Content Power On disjoint back case check lighting Copyright 2015 LG Electronics Inc All rights reserved Only for training and service purposes LGE Internal Use Only ...

Page 62: ...d date Revised date 1 Measure DC Voltage applying to LED backlight from Power Board 2 Output DC Voltage from Power Board supply to LED backlight Check Pin contacting statement and connection statement Error symptom Content Copyright 2015 LG Electronics Inc All rights reserved Only for training and service purposes LGE Internal Use Only ...

Page 63: ...f Color Temp Cool Medium Warm re enter the value after replacing the MAIN BOARD Standard Repair Process Detail Technical Manual Check White Balance value A Video error_No video Normal audio A3 Established date Revised date Error symptom Content Copyright 2015 LG Electronics Inc All rights reserved Only for training and service purposes LGE Internal Use Only ...

Page 64: ...te Revised date Check D 13 2V A13 2V 4 8 PIN 12 Pin Power Board Main Board SMH200 H12S4 1 Power on 2 PDIM 2 3 GND 4 D 13 2V 5 D 13 2V 6 D 13 2V 7 A 13 2V 8 A 13 2V 9 GND 10 GND 11 DRV_ON 12 PDIM 1 Error symptom Content Copyright 2015 LG Electronics Inc All rights reserved Only for training and service purposes LGE Internal Use Only ...

Page 65: ...15dB 20dB etc Standard Repair Process Detail Technical Manual TUNER input signal strength checking method A Video error_Video error video lag stop A5 Established date Revised date Error symptom Content Copyright 2015 LG Electronics Inc All rights reserved Only for training and service purposes LGE Internal Use Only ...

Page 66: ...ideo lag stop Checking SW version method for remote controller for adjustment Press the IN START with the remote controller for adjustment A6 Established date Revised date Error symptom Content Copyright 2015 LG Electronics Inc All rights reserved Only for training and service purposes LGE Internal Use Only ...

Page 67: ...ical Horizontal bar residual image light spot As the part connecting to the external input check the screen condition by signal A7 Established date Revised date Error symptom Content Copyright 2015 LG Electronics Inc All rights reserved Only for training and service purposes LGE Internal Use Only ...

Page 68: ...ocess Detail Technical Manual Check and replace Link Cable LVDS and contact condition A Video error_Color error A8 A9 Established date Revised date Error symptom Content Copyright 2015 LG Electronics Inc All rights reserved Only for training and service purposes LGE Internal Use Only ...

Page 69: ... patterns using the ADJ Key Checking item 1 Defective pixel 2 Residual image 3 MODULE error ADD BAR SCAN BAR 4 Video error Classification of MODULE or Main B D A10 Established date Revised date Error symptom Content Copyright 2015 LG Electronics Inc All rights reserved Only for training and service purposes LGE Internal Use Only ...

Page 70: ...n Solder defect CNT Broken Solder defect CNT Broken Solder defect CNT Broken Abnormal Power Section Solder defect Short Crack Abnormal Power Section Solder defect Short Crack Appendix Exchange T Con Board 1 Copyright 2015 LG Electronics Inc All rights reserved Only for training and service purposes LGE Internal Use Only ...

Page 71: ...ower Section Solder defect Short Crack Fuse Open Abnormal power section Noise GRADATION GRADATION Abnormal Display Appendix Exchange T Con Board 2 Copyright 2015 LG Electronics Inc All rights reserved Only for training and service purposes LGE Internal Use Only ...

Page 72: ...Press damage Crosstalk Crosstalk Press damage Panel Mura Light leakage Press damage Un repairable Cases In this case please exchange the module Copyright 2015 LG Electronics Inc All rights reserved Only for training and service purposes LGE Internal Use Only ...

Page 73: ...lock Source TAB IC Defect Horizontal Block Gate TAB IC Defect Horizontal line Gate TAB IC Defect Gate TAB IC Defect Horizontal Block Gate TAB IC Defect Appendix Exchange the Module 2 Un repairable Cases In this case please exchange the module Copyright 2015 LG Electronics Inc All rights reserved Only for training and service purposes LGE Internal Use Only ...

Page 74: ...LED B Power error _No power A11 Established date Revised date ST BY condition Red Front LED control Menu Option Standby Light On Off Error symptom Content Copyright 2015 LG Electronics Inc All rights reserved Only for training and service purposes LGE Internal Use Only ...

Page 75: ...date Revised date Check D 13 2V 4 5 6 PIN 12 Pin Power Board Main Board SMH200 H12S4 1 Power on 2 PDIM 2 3 GND 4 D 13 2V 5 D 13 2V 6 D 13 2V 7 A 13 2V 8 A 13 2V 9 GND 10 GND 11 DRV_ON 12 PDIM 1 Error symptom Content Copyright 2015 LG Electronics Inc All rights reserved Only for training and service purposes LGE Internal Use Only ...

Page 76: ...ate Check power on Pin 1 pin is high about 3 3V 12 Pin Power Board Main Board SMH200 H12S4 1 Power on 2 PDIM 2 3 GND 4 D 13 2V 5 D 13 2V 6 D 13 2V 7 A 13 2V 8 A 13 2V 9 GND 10 GND 11 DRV_ON 12 PDIM 1 Error symptom Content Copyright 2015 LG Electronics Inc All rights reserved Only for training and service purposes LGE Internal Use Only ...

Page 77: ...ustment item 3 Standard Repair Process Detail Technical Manual POWER OFF MODE checking method B Power error _Off when on off whiling viewing A14 Established date Revised date Error symptom Content Copyright 2015 LG Electronics Inc All rights reserved Only for training and service purposes LGE Internal Use Only ...

Page 78: ... Speaker Check Standard Repair Process Detail Technical Manual Checking method in menu when there is no audio C Audio error_No audio Normal video A15 Established date Revised date Error symptom Content Copyright 2015 LG Electronics Inc All rights reserved Only for training and service purposes LGE Internal Use Only ...

Page 79: ...the GND and output terminal the speaker is normal Standard Repair Process Detail Technical Manual Voltage and speaker checking method when there is no audio C Audio error_No audio Normal video A16 Established date Revised date 12 Pin Power Board Main Board SMH200 H12S4 1 Power on 2 PDIM 2 3 GND 4 D 13 2V 5 D 13 2V 6 D 13 2V 7 A 13 2V 8 A 13 2V 9 GND 10 GND 11 DRV_ON 12 PDIM 1 Error symptom Content...

Page 80: ... normal when the Analog Tester needle moves slowly and defective when it does not move at all Standard Repair Process Detail Technical Manual Remote controller operation checking method D Function error_ No response in remote controller key error A17 Established date Revised date P4600 Sub Ass y Main Ass y Error symptom Content Copyright 2015 LG Electronics Inc All rights reserved Only for trainin...

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