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LG 32LH20D, Service Manual

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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.

INTERFACE

DSUB_B

002:E18

ISP_RXD

001:Y14

C510

OPT

R501
470K

C518

220pF

50V

R534

0

JK507

KCN-DS-1-0088

1

2

3

4

5

6

7

8

9

10

PC_L_IN

002:S15

IC502

MAX3232CDR

3

C

1

-

2

V

+

4

C

2

+

1

C

1

+

6

V

-

5

C

2

-

7

D

O

U

T

2

8

R

I

N

2

9

R

O

U

T

2

1

0

D

I

N

2

1

1

D

I

N

1

1

2

R

O

U

T

1

1

3

R

I

N

1

1

4

D

O

U

T

1

1

5

G

N

D

1

6

V

C

C

R551

100

JK501

KCN-DS-1-0089

1

2

3

4

5

6

7

8

9

1

0

1

1

1

2

1

3

1

4

1

5

1

6

DSUB_G

002:E18

R508
0

C509

OPT

DSUB_R

002:E17

C501

100pF

50V

C519

220pF

50V

R549

4.7K

C511

OPT

R502
470K

DBG_TX

R557

0

OPT

R540
22

R546

1K

R533

0

DBG_RX

ISP_TXD

+5V_ST

C502

100pF

50V

+5V_ST

R543

0

OPT

+3.3V

R507
0

JK505

PEJ024-01

6B

T_TERMINAL2

8

SHIELD_PLATE

7B

B_TERMINAL2

5

T_SPRING

4

R_SPRING

7A

B_TERMINAL1

6A

T_TERMINAL1

3

E_SPRING

R542

22

C528
0.1uF
50V

PC_R_IN

002:S15

R548

4.7K

DSUB_HSYNC

002:E17

DSUB_VSYNC

002:E17

DSUB_DET

R553

100

R537

75

R535

75

R536

75

C515
0.1uF

16V

EDID_WP

D519

ENKMC2838-T112

A1

C

A2

+5V_ST

R545

4.7K

C523

0.047uF

25V

C521
0.33uF
16V

C517

0.33uF

16V

C522
0.33uF
16V

IC501

CAT24C02WI-GT3

3

A2

2

A1

4

VSS

1

A0

5

SDA

6

SCL

7

WP

8

VCC

D513

30V

D514

30V

ADUC30S03010L_AMODIODE 

D515

30V

ADUC30S03010L_AMODIODE 

D516

30V

ADUC30S03010L_AMODIODE 

D517

30V

ADUC30S03010L_AMODIODE 

D529

30V

ADUC30S03010L_AMODIODE 

OPT

D530

30V

ADUC30S03010L_AMODIODE 

OPT

D518

5.6V

ADMC5M03200L_AMODIODE

OPT

D520

5.6V

ADMC5M03200L_AMODIODE

OPT

D522

5.6V

ADMC5M03200L_AMODIODE

OPT

D501

5.6V

ADMC5M03200L_AMODIODE

OPT

D502

5.6V

ADMC5M03200L_AMODIODE

OPT

D511

30V

AMOTECH

D509

30V

AMOTECH

R521
10K

D503

5.6V

AMOTECH

R518

10K

+3.3V

R531

0

COMP1_Y_IN

002:E15

COMP1_DET

001:AJ20

COMP1_Pr_IN

002:E15

R527
12K

R512
470K

AV1_DET

COMP1_Pb_IN

002:E16

C506

100pF

50V

AV1_R_IN

D510

5.6V

AMOTECH

C504
1000pF

50V

+3.3V

R530

12K

R514
0

D506

30V

AMOTECH

D505

5.6V

AMOTECH

R528
12K

R526
1K

R529
12K

C503
0.1uF
16V

R510

470K

D508

5.6V

AMOTECH

R515
0

C507

100pF

50V

R532

0

COMP1_R_IN

002:S13

R517

4.7K

C508
47pF
50V

R520
10K

R516

4.7K

R509

75

D507

30V

AMOTECH

AV1_L_IN

AV1_CVBS_IN

R525

1K

R513
470K

R511
470K

R524
75

R523

75

C505
1000pF

50V

R519

10K

D512

5.6V

AMOTECH

COMP1_L_IN

002:S13

D504

5.6V

AMOTECH

R522

75

R564

12K

D527

5.6V

AMOTECH

C526

100pF

50V

R560

1K

R555

470K

AV2_DET

AV2_L_IN

R556
470K

C527

100pF

50V

+3.3V

C525
47pF
50V

R558
4.7K

R561
10K

D526

30V

AMOTECH

R563
12K

R554
75

AV2_CVBS_IN

C524
0.1uF
16V

AV2_R_IN

R562
10K

D525

5.6V

AMOTECH

D528

5.6V

AMOTECH

R552
0

R539
2.2K

R538
2.2K

C514

18pF

50V

C513
18pF

50V

R541

10K

R544

100

C512
0.1uF

16V

R503
15K

R504
15K

R505

10K

R506

10K

IR_OUT

001:AJ26

JK502

PPJ228-01

9A

[GN]E-LUG

4A

[GN]O-SPRING-S

3A

[GN]CONTACT-S

9C

[RD]E-LUG_1

8C

[RD]C-LUG-S

9D

[WH]E-LUG

8D

[WH]C-LUG-S

9E

[RD]E-LUG_2

4E

[RD]O-SPRING-S

3E

[RD]CONTACT-S

5F

[YL]O-SPRING-L

6F

[YL]CONTACT-L

7G

[WH]C-LUG-L

5H

[RD]O-SPRING-L

6H

[RD]CONTACT-L

9B

[BL]E-LUG

8B

[BL]C-LUG-S

+3.3V

C530

0.1uF

R565

10K

IC503

MIC2019YM6

EAN60223701

3

ENABLE

2

GND

4

FAULT

1

VIN

6

VOUT

5

ILIMIT

R566
47

R569

0

REAR USB

L501

BLM18PG121SN1D

120-ohm

C520
10uF
10V

C534

10uF

REAR USB

L502

BLM18PG121SN1D

SIDE_USB_DP

001:AN8

C529

10uF

D524

5.6V

CDS3C05HDMI1

C531

100uF

REAR USB

R567

0

OPT

SIDE_USB_DM

001:AN8

R559
4.7K

USB_CTL

001:AJ26

R550

180

+5V_USB

R570

0

REAR USB

R568

0

REAR USB

D523

5.6V

CDS3C05HDMI1

USB_OCD

001:AI14

JK506

KJA-UB-4-0004

SIDE USB

1

+5V_USB

2

DM

3

DP

4

GND

5

GND

JK508

KJA-UB-0-0037

REAR USB

1

+5V_USB

2

DM

3

DP

4

GND

5

GND

JK504

PPJ218-02

FHD

5C

[RD]CONTACT

2C

[RD]U_CAN

4C

[RD]O_SPRING

2B

[WH]U_CAN

3B

[WH]C_LUG

2A

[YL]U_CAN

5A

[YL]CONTACT

4A

[YL]O_SPRING

JK503

JST1223-001

1

GND

2

VCC

3

VINPUT

4

FIX_POLE

SPDIF_OUT

IC500

NL17SZ00DFT2G

3

GND

2

B

4

Y

1

A

5

VCC

R500

4.7K

R547

0

OPT

R573

0

R574

0

OPT

C532
0.1uF
16V

C500
0.1uF
16V

C516
100pF
50V

R572

1K
OPT

D500

OPT

ADMC5M03200L_AMODIODE

R571
22

1/16W
5%

+3.3V

+3.3V

+5V_GENERAL

PC AUDIO

RS232C

EAX59793902(0)

5    11

INTERFACE

   2009.01.31

[ PC ]

AV2(SIDE)

Component and AV(CVBS)

AUS_LH20/LH35

FHD Option has been applied to this block

SIDE AV-IN_Only LH35

For LH20_LH35 MP PCB_090131

EAX59793902(0)_AUS_MERCURY

DEVELOPE

Side USB

SPDIF OPTIC JACK

Copyright ⓒ 2009 LG Electronics Inc. All right reserved.
Only for traning and service purposes

LGE Internal Use Only

Summary of Contents for 32LH20D

Page 1: ...READ THE SAFETY PRECAUTIONS IN THIS MANUAL CHASSIS LB91A MODEL 32LH20D 32LH20D AA North Latin America http aic lgservice com Europe Africa http eic lgservice com Asia Oceania http biz lgservice com Internal Use Only P NO MFL60020303 0904 REV00 Printed in Korea ...

Page 2: ...Electronics Inc All right reserved Only for training and service purposes 2 LGE Internal Use Only CONTENTS CONTENTS 2 PRODUCT SAFETY 3 SPECIFICATION 6 ADJUSTMENT INSTRUCTION 10 BLOCK DIAGRAM 14 EXPLODED VIEW 15 SVC SHEET ...

Page 3: ... 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 metallic parts such as antenna terminals...

Page 4: ... on your body by touching a known earth ground Alternatively obtain and wear a commercially available discharging 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 electrostatic charge...

Page 5: ...the 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 replac...

Page 6: ...11 Color Depth 8 bit 16 7M colors 12 Coating 3H Anti glare 1 Application Range This specification sheet is applied to the LCD TV used LB91A chassis 2 Specification Each part is tested as below without special appointment 1 Temperature 25 5 C 77 9ºF CST 40 5ºC 2 Relative Humidity 65 10 3 Power Voltage Standard input voltage 100 240V 50 60Hz Standard Voltage of each products is marked by models 4 Sp...

Page 7: ...vid CSM Cool White 85 IRE Y 0 03 0 333 0 03 GREEN X 0 292 Y 0 604 BLUE X 0 145 Y 0 064 P1 P2 P3 P4 P5 1W 4 2W 4 3W 4 1H 4 2H 4 3H 4 Measurement position 5 point 5 Chroma Brightness 5 1 Module optical specifications LGD module Uniformity Measurement Position 5 2 Chroma PSM Vivid Color Temperature Cool except RGB PC Mode PSM Standard Color Temperature Medium The W B Tolerance is 0 002 for Adjustment...

Page 8: ...1 25 50 00 HDTV 1080i 11 1920x1080 33 75 60 00 HDTV 1080i 12 1920x1080 33 72 59 94 HDTV 1080i 13 1920x1080 56 250 50 HDTV 1080p 14 1920x1080 67 43 67 5 59 94 60 HDTV 1080p 7 Component Video Input Y CB PB CR PR 6 SET Optical Feature 6 1 General feature Measurement Condition Full white Vivid Measure the black luminance after 30 seconds No Item Module Luminance min C R min Remark AV COMPONENT HDMI AV...

Page 9: ...V freq Hz Pixel clock MHz Remark PC 1 720 400 31 468 70 08 28 321 HDCP 2 640 480 31 469 59 94 25 17 VESA HDCP 3 800 600 37 879 60 31 40 00 VESA HDCP 4 1024 768 48 363 60 00 65 00 VESA XGA HDCP 5 1280 768 47 78 59 87 79 5 WXGA HDCP 6 1360 768 47 72 59 8 84 75 WXGA HDCP 7 1280 1024 63 595 60 0 108 875 SXGA HDCP 8 1920 1080 67 5 60 148 5 WUXGA HDCP DTV 1 720 480 31 469 31 5 59 94 60 27 00 27 03 SDTV ...

Page 10: ...cute ISP program Mstar ISP Utility and then click Config tab 2 Set as below and then click Auto Detect and check OK message If Error is displayed Check connection between computer jig and set 3 Click Read tab and then load download file XXXX bin by clicking Read 4 Click Connect tab If Can t is displayed Check connection between computer jig and set 5 Click Auto tab and set as below 6 Click Run 7 A...

Page 11: ...Process 3 3 1 ADC Input signal Component Signal equipment displays Adjustment pattern Component 480I MODEL 209 in Pattern Generator 480i Mode PATTERN 65 in Pattern Generator MSPG 925 SERISE Input Signal RGB You don t need to connect RGB Cable Because We use TV internal pattern After enter Service Mode by pushing ADJ key Enter Internal ADC mode by pushing key at 5 ADC Calibration Caution Using powe...

Page 12: ...dule Manual W B process using adjusts Remote control After enter Service Mode by pushing ADJ key Enter White Balance by pushing key at 3 White Balance After done all adjustments Press In start button 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 mo...

Page 13: ...nly Copyright 2009 LG Electronics Inc All right reserved Only for training and service purposes For Analog EDID For HDMI EDID D sub to D sub DVI D to HDMI or HDMI to HDMI No Item Condition Hex Data 1 Manufacturer ID GSM 1E6D 2 Version Digital 1 01 3 Revision Digital 3 03 Detail EDID Options are below a Product ID MODEL NAME HEX EDID Table DDC Func tion FHD Model 0001 01 00 Analog Digital HD Model ...

Page 14: ...r CVBS SIF TS_Serial In TS_clk Sync Val Err TS_Parallel In 0 7 l SCL SDA_3 3V CVBS LCD Module LVDS Buffer CE6355 Intel Demod CVBS RGB H V EEPROM AV 1 AV 2 RGB Audio L R USB2 0 USB DP DM MIC2019 O C Protector 5V 5V Serial Flash 32Mbit SPI EEPROM 512K CM3212 Sensor SCL SDA_3 3V XC5000 Tuner LH30 LU20 Side LH20 Rear Rear DDR2 512Mbit Qimonda Hynix DDR_Data 0 15 DQS DM Addr ctrl data Rear Audio L R Au...

Page 15: ... 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 manufacturer IMPORTANT SAFETY NOTICE 300 200 801 802 803 804 805 806 520 530 540 550 400 900 120 510 50...

Page 16: ...SP_TXD R144 10K C109 2 2uF R234 0 5V_HDMI_3 AV2_DET AV1_DET IC100 LGE3368A Saturn6 No DivX HWRESET D4 PCMD0 CI_D0 AC16 PCMD1 CI_D1 AA15 PCMD2 CI_D2 AA16 PCMD3 CI_D3 AC6 PCMD4 CI_D4 Y10 PCMD5 CI_D5 Y11 PCMD6 CI_D6 Y12 PCMD7 CI_D7 Y13 PCM_A0 CI_A0 AB16 PCM_A1 CI_A1 AC15 PCM_A2 CI_A2 AC14 PCM_A3 CI_A3 AB14 PCM_A4 CI_A4 AC12 PCM_A5 CI_A5 AB8 PCM_A6 CI_A6 AC13 PCM_A7 CI_A7 AA9 PCM_A8 CI_A8 AB5 PCM_A9 C...

Page 17: ...245 100 R244 0 R252 0 R253 100 R254 100 R251 0 R278 100 R279 100 R261 470 C316 2 2uF 16V LGE3368A Saturn6 No DivX IC100 RXACKP F1 RXACKN F2 RXA0P G2 RXA0N G3 RXA1P H3 RXA1N G1 RXA2P H1 RXA2N H2 DDCD_A_DA A1 DDCD_A_CK B2 HOTPLUG_A A2 RXBCKP C3 RXBCKN B1 RXB0P C1 RXB0N C2 RXB1P D2 RXB1N D3 RXB2P E3 RXB2N D1 DDCD_B_DA E1 DDCD_B_CK F3 HOTPLUG_B E2 RXCCKP AE8 RXCCKN AD8 RXC0P AD9 RXC0N AF8 RXC1P AF9 RX...

Page 18: ... DQ11 D7 DQ10 C2 DQ9 C8 DQ8 F9 DQ7 F1 DQ6 H9 DQ5 H1 DQ4 H3 DQ3 H7 DQ2 G2 DQ1 G8 DQ0 IC300 HY5PS1G1631CFP S6 Hynix_1G_DDR J2 VREF J8 CK H2 VSSQ2 B7 UDQS N8 A4 P8 A8 L1 BA2 L2 BA0 R8 NC3 K7 RAS F8 VSSQ3 F3 LDM P3 A9 M3 A1 N3 A5 K8 CK R3 NC5 L3 BA1 J7 VSSDL L7 CAS F2 VSSQ4 B3 UDM M2 A10 AP K2 CKE R7 NC6 M7 A2 N7 A6 M8 A0 J1 VDDL K3 WE E8 LDQS P7 A11 K9 ODT A2 NC1 N2 A3 P2 A7 H8 VSSQ1 F7 LDQS A8 UDQS ...

Page 19: ... 1uF 16V C413 56pF L409 CM2012F2R2KT R411 680 R443 0 R416 0 C458 22uF 16V FE_TS_DATA R436 0 R410 82 C439 0 1uF 16V C419 1000pF 50V IF_AGC 3 3V_TU_CE C479 0 1uF 16V R414 0 TUNER_CVBS_IF_P C468 10uF 6 3V C470 0 1uF 16V 5V_TUNER FE_TUNER_SCL DEMOD_RESET 001 M18 004 L1 R405 0 1 16W 5 DTV_IF_P C417 0 1uF C443 0 1uF 16V C456 0 1uF 16V R468 1K FE_TUNER_SCL LD401 SAM2333 A2 GN C A1 RD FE_TS_SYNC 001 AM18 ...

Page 20: ...8 5 6V AMOTECH R515 0 C507 100pF 50V R532 0 COMP1_R_IN 002 S13 R517 4 7K C508 47pF 50V R520 10K R516 4 7K R509 75 D507 30V AMOTECH AV1_L_IN AV1_CVBS_IN R525 1K R513 470K R511 470K R524 75 R523 75 C505 1000pF 50V R519 10K D512 5 6V AMOTECH COMP1_L_IN 002 S13 D504 5 6V AMOTECH R522 75 R564 12K D527 5 6V AMOTECH C526 100pF 50V R560 1K R555 470K AV2_DET AV2_L_IN R556 470K C527 100pF 50V 3 3V C525 47pF...

Page 21: ... R623 2 2K OPT R621 0 OPT OPC_EN 3 3V LVDS_B0 LVDS_B2 LVDS_B1 LVDS_B3 LVDS_BC LVDS_B1 LVDS_B0 LVDS_B3 LVDS_B2 LVDS_BC P602 TF05 51S FHD 1 VLCD 2 VLCD 3 VLCD 4 VLCD 5 NC 6 GND 7 GND 8 PANEL_AGP 9 GND 10 GND 11 12 13 14 15 GND 16 R2CLKP 17 R2CLKN 18 GND 19 20 21 22 23 24 25 BIT_SEL 26 GND 27 28 29 30 31 GND 32 R1CLKP 33 R1CLKN 34 GND 35 36 37 38 39 40 41 GND 42 OPC_EN 43 OPC_OUT 44 P_DIM 45 LVDS_SEL...

Page 22: ... J16 5V_ST 5V_HDMI_2 HDMI1_RX0 002 D7 HDMI1_RX2 002 D8 IC702 AT24C02BN 10SU 1 8 3 A2 2 A1 4 GND 1 A0 5 SDA 6 SCL 7 WP 8 VCC EDID_WP R735 0 FHD CEC_REMOTE R715 0 JP705 D705 ENKMC2838 T112 A1 C A2 HDMI1_CLK 002 D7 5V_HDMI_3 HDMI3_RX2 002 E13 HPD1 HDMI1_SDA HDMI2_RX0 002 D10 HDMI3_RX1 002 E13 R706 0 R721 22 HDMI2_RX1 002 D10 C702 0 1uF HDMI1_RX1 002 D8 HDMI3_CLK 002 E12 EDID_WP IC704 CAT24WC08W T 3 A...

Page 23: ...V 0 1uF C808 0 1uF C805 50V C802 0 1uF 50V 0 1uF C813 50V C807 1000pF 50V C806 1000pF 50V R804 0 R805 100 R806 100 R807 100 D802 100V 1N4148W OPT D803 100V 1N4148W OPT D804 100V 1N4148W OPT D805 100V 1N4148W OPT L801 BLM18PG121SN1D L802 BLM18PG121SN1D AMP_VCC L803 CB3216PA501E Big_ 24V Small_ 15V L807 120 ohm L809 120 ohm L808 120 ohm IC801 NTP 3100L EAN60664001 1 BST1A 2 VDR1A 3 RESET 4 AD 5 DVSS...

Page 24: ... C966 0 1uF 50V C929 0 01uF 50V C927 10uF Q905 2SC3052 E B C L903 CB3216UA121 L906 CB3216UA121 PANEL_CTL 001 AK10 1 8V_DDR L921 Big_ 12V Small_ 15V L917 22UH C919 22uF L920 BLM18PG121SN1D C967 0 1uF 50V 5V_TUNER GND 5V_ST C960 0 1uF C965 0 1uF 5V_GENERAL 001 G23 005 Y4 005 Z4 009 AK3 Q908 RSR025P03 S D G R956 10K C961 10uF 16V C963 10uF Q907 2SC3052 E B C 5V_ST L922 CIC21J501NE POWER_ON RL_ON R961...

Page 25: ...978 1000pF 50V R973 4 7K 3 3V_ST R972 100 KEY1 C972 0 1uF 16V 26 UNDER_KEY R979 0 OPT C981 1000pF 50V 32 UP_IR_KEY C973 1000pF 26 UNDER_IR LED_G D953 5 6V AMOTECH 26 UNDER_KEY SUB AMP_SDA SUB AMP_SCL R974 4 7K L958 BLM18PG121SN1D 32 UP_IR_KEY D957 5 6V C979 100pF 50V 5V_ST POWER_ON RL_ON C977 0 1uF 16V 26 UNDER_KEY R971 100 C974 1000pF 26 UNDER_IR L959 BLM18PG121SN1D P951 12507WS 08L 26 UNDER_IR E...

Page 26: ......

Page 27: ...d Always check record S W Version and White Balance value before replacing the Main Board Replace Main Board Re enter White Balance value Precaution Established date Electronics 6 3 Standard Repair Process Revised date 2008 3 26 1 13 LCD TV Error symptom A Video error No video Normal audio First of all Check whether all of cables between board is inserted properly or not Main B D Power B D LVDS Ca...

Page 28: ...MAIN B D Y Replace Power Board and repair parts N End Standard Repair Process A Video error No video No audio Established date Electronics 6 3 Revised date 2008 3 26 2 13 LCD TV Error symptom 2 Copyright ⓒ 2009 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only ...

Page 29: ...ormal Picture Y N Y Close Normal Picture Y Close Menu Setup Booster By using Digital signal level meter By using Diagnostics menu on OSD Menu Setup Diagnostic Signal strength Normal over 50 Signal Quality Normal over 50 Normal Picture Y Contact with signal distributor or broadcaster Cable or Air N N Normal Picture Y Close N Standard Repair Process Established date Electronics 6 3 Revised date 2008...

Page 30: ...evice Cable normal RGB HDMI DVI error Check external device and cable Replace Main B D Replace Main B D N N A Video error Color error N Y End Replace module Request repair for external device cable Replace T Con Board N Y Color error Other Module Color error Check Test pattern Standard Repair Process Established date Electronics 6 3 Revised date 2008 3 26 4 13 LCD TV Error symptom 4 Copyright ⓒ 20...

Page 31: ...etc N Y Replace Main B D Screen normal Check screen condition by input External Input Component RGB HDMI DVI Request repair for external device Component error RGB error HDMI DVI Connect other external device and cable Check normal operation of External Input Component RGB and HDMI DVI by connecting Jig pattern Generator Set top Box etc Replace Main B D Screen normal N Y Check S W Version Y N Chec...

Page 32: ...al voltage Replace Power B D Y Standard Repair Process Established date Electronics 6 3 Revised date 2008 3 26 6 13 LCD TV Error symptom 09 years new model apply mechanical power switch to reduce power consumption in stand by status If mechanical power switch off Doesn t turn on by remote control Doesn t appear LED light Please refer to the A21 Page 6 Stand By Red Operating Blue Check Repair Mecha...

Page 33: ...Power off by REMOTE CONTROL POWEROFF_OFFTIMER Power off 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 Downlo...

Page 34: ... and repair parts Check Speaker disconnection N Y Replace Speaker Replace MAIN Board End C Audio error No audio Normal video Disconnection Established date Electronics 6 3 Revised date 2008 3 26 8 13 LCD TV Error symptom Standard Repair Process 8 Copyright ⓒ 2009 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only ...

Page 35: ...k other external device N Y Normal audio Check and fix external device Replace Power B D N Y Normal voltage Check input signal RF External Input signal Signal normal When RF signal is not received Request repair to external cable ANT provider Y Check audio B Voltage 20V or 24V Replace Main B D In case of External Input signal error Check and fix external device Replace Main B D N End Established d...

Page 36: ...ormal Voltage Close N N Check 5v on Power B D Replace Power B D or Replace Main B D Power B D don t have problem Check IR Output signal Normal Signal N Y Repair Replace IR B D N Replace Main B D Y Y N Check R C Operation Normal operating Y Check Repair Cable connection Connector solder Normal operating Close N Check Replace Assembly status Key PCB tool Check Key Output signal Y Normal operating Cl...

Page 37: ...ble RGB HDMI DVI Optical Recognition error Replace Main B D Replace Main B D Fix in accordance with technical information D Function error External device recognition error Established date Electronics 6 3 Revised date 2008 3 26 11 13 LCD TV Error symptom Standard Repair Process 11 Copyright ⓒ 2009 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only ...

Page 38: ...dels 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 With Inverter Module Without Inverter Module Established date Electronics 6 3 Re...

Page 39: ...ller Remote controller damage Stand dent Replace stand F Exterior defect Exterior defect Established date Electronics 6 3 Revised date 2008 3 26 13 13 LCD TV Error symptom Standard Repair Process 13 Copyright ⓒ 2009 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only ...

Page 40: ...4 5 AV Scart CVBS S Video 5 6 Component 7 7 RGB D SUB 9 8 HDMI 11 9 Audio Problem All Input 13 10 Digital TV 14 11 Analog TV 15 12 AV Component RGB HDMI PC HDMI DTV 16 13 AV Audio out No Audio SPDIF 23 14 USB Remocon Problem USB no connect Remocon 24 15 Intelligent Sensor Intelligent Sensor 25 Copyright ⓒ 2009 LG Electronics Inc All right reserved Only for training and service purposes LGE Interna...

Page 41: ...26V Replace MAIN B D IC805 YES NO MAIN B D L809 1 8V Replace MAIN B D IC807 YES NO Check MAIN B D X100 Clock 12MHz Replace MAIN B D IC100 YES NO Replace MAIN B D IC102 NAND FLASH YES Replace MAIN B D IC103 Serial Flash NO Replace MAIN B D IC300 IC301 DDR2 Memory NO Replace MAIN B D IC100 NO Making Revision 2009 2 1 1 25 LCD TV Symptom Power Up Boot Fail Copyright ⓒ 2009 LG Electronics Inc All righ...

Page 42: ...AIN B D L810 12V Replace MAIN B D Q805 NO Replace Main Board YES P800 Pin 13 14 12V P800 Pin 17 18 24V Check LVDS Cable OK YES Replace LVDS Cable NO Making Revision 2009 2 1 LCD TV Symptom No OSD 2 25 Copyright ⓒ 2009 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only ...

Page 43: ...AIN B D IC808 MAIN B D L1113 1 8V Replace MAIN B D IC1105 YES NO YES MAIN B D X1101 Clock NO Replace MAIN B D X1101 Making Revision 2009 2 1 LCD TV Symptom Digital TV Video Problem 3 25 Copyright ⓒ 2009 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only ...

Page 44: ...5V YES MAIN B D L1112 3 3V NO Replace MAIN B D IC1103 YES NO Replace MAIN B D IC808 MAIN B D L1113 1 8V Replace MAIN B D IC1105 YES NO YES MAIN B D X1101 Clock NO Replace MAIN B D X1101 Copyright ⓒ 2009 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only ...

Page 45: ...Check MAIN B D R420 Video Signal NO YES Check MAIN B D C217 Video Signal Replace MAIN B D C217 NO Replace MAIN B D IC 100 YES Making Revision 2009 2 1 LCD TV Symptom AV1 CVBS No Video Problem 5 25 Copyright ⓒ 2009 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only ...

Page 46: ...Check MAIN B D R465 Video Signal NO YES Check MAIN B D C211 Video Signal Replace MAIN B D C211 NO Replace MAIN B D IC 100 YES Making Revision 2009 2 1 LCD TV Symptom AV2 CVBS No Video Problem 6 25 Copyright ⓒ 2009 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only ...

Page 47: ...Signal NO YES Check MAIN B D C200 C203 Y C201 Pb C202 Pr Video Signal Replace MAIN B D C200 or C203 or C201 or C202 NO Replace MAIN B D IC 100 YES Making Revision 2009 2 1 7 25 LCD TV Symptom Component1 No Video No Color Problem Copyright ⓒ 2009 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only ...

Page 48: ...Signal NO YES Check MAIN B D C214 C209 Y C215 Pb C216 Pr Video Signal Replace MAIN B D C214 or C209 or C215 or C216 NO Replace MAIN B D IC 100 YES Making Revision 2009 2 1 8 25 LCD TV Symptom Component2 No Video No Color Problem Copyright ⓒ 2009 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only ...

Page 49: ...eo R2030 HSYNC R2031 VSYNC Replace MAIN B D C207 or R2030 or R2031 NO Replace MAIN B D IC 100 YES MAIN B D JK405 Pin 2 Video signal R446 has Vsync R447 has Hsync Making Revision 2009 2 1 9 25 LCD TV Symptom RGB No Video Problem Copyright ⓒ 2009 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only ...

Page 50: ...17 GREEN C2018 BLUE Video Signal Replace MAIN B D C2016 or C2017 or C2018 NO Replace MAIN B D IC 100 YES MAIN B D JK405 Pin 3 BLUE Pin 2 GREEN Pin 1 RED Video signal Making Revision 2009 2 1 10 25 LCD TV Symptom RGB No Color Problem Copyright ⓒ 2009 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only ...

Page 51: ...the ADJUST MENU EDID OK YES Download EDID Refer to Adjustment Spec NO NO Replace MAIN B D IC601 HDCP KEY Making Revision 2009 2 1 11 25 LCD TV Symptom HDMI 1 4 All No Video Problem Copyright ⓒ 2009 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only ...

Page 52: ...N B D JACK Check JK600 HDMI1 JK601 HDMI2 JK602 HDMI3 JK603 HDMI4 YES Making Revision 2009 2 1 12 25 LCD TV Symptom HDMI1 or 2 or 3 or 4 No Video Problem Check MAIN B D IC600 YES Copyright ⓒ 2009 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only ...

Page 53: ...Replace Speaker Cable NO Replace MAIN B D IC807 NO YES MAIN B D L824 1 8V MAIN B D Check R701 R702 R705 Signal YES Replace MAIN B D IC100 NO Replace MAIN B D IC701 NO Making Revision 2009 2 1 13 25 LCD TV Symptom All Source no Audio Problem Copyright ⓒ 2009 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only ...

Page 54: ...K YES Replace MAIN B D IC 100 Making Revision 2009 2 1 14 25 LCD TV Symptom Digital TV No Audio Problem Copyright ⓒ 2009 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only ...

Page 55: ... Video OK YES Check MAIN B D R2046 Signal SIF NO Replace MAIN B D IC100 YES Making Revision 2009 2 1 15 25 LCD TV Symptom Analog TV No Audio Problem Copyright ⓒ 2009 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only ...

Page 56: ...nd signal YES NO Replace MAIN B D IC 100 AV1 Video OK YES Check MAIN B D JK402 Replace MAIN B D JK402 NO YES Making Revision 2009 2 1 16 25 LCD TV Symptom AV1 No Audio Problem Copyright ⓒ 2009 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only ...

Page 57: ...und signal YES NO Replace MAIN B D IC 100 AV2 Video OK YES Check MAIN B D JK402 Replace MAIN B D JK402 NO YES Making Revision 2009 2 1 17 25 LCD TV Symptom AV2 No Audio Problem Copyright ⓒ 2009 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only ...

Page 58: ...ignal YES NO Replace MAIN B D IC 100 Component Video OK YES Check MAIN B D JK402 Replace MAIN B D JK402 NO YES Making Revision 2009 2 1 18 25 LCD TV Symptom Component1 No Audio Problem Copyright ⓒ 2009 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only ...

Page 59: ... signal YES NO Replace MAIN B D IC 100 Component Video OK YES Check MAIN B D JK402 Replace MAIN B D JK402 NO YES Making Revision 2009 2 1 19 25 LCD TV Symptom Component2 No Audio Problem Copyright ⓒ 2009 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only ...

Page 60: ...nd signal YES NO Replace MAIN B D IC 100 RGB Video OK YES Check MAIN B D JK401 Replace MAIN B D JK401 NO YES Making Revision 2009 2 1 20 25 LCD TV Symptom RGB HDMI PC No Audio Problem Copyright ⓒ 2009 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only ...

Page 61: ...D Refer to Adjustment Spec NO Check the HDMI Cable Replace MAIN B D IC100 YES Making Revision 2009 2 1 21 25 LCD TV Symptom HDMI DTV No Audio Problem Copyright ⓒ 2009 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only ...

Page 62: ...ES Check MAIN B D JK403 Replace MAIN B D JK403 NO YES NO Check the Trouble Shooting Guide Related to Audio Problem NO Making Revision 2009 2 1 22 25 LCD TV Symptom SPDIF No Audio Problem Copyright ⓒ 2009 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only ...

Page 63: ... YES Check MAIN B D R826 5V Replace MAIN B D IC808 YES NO Replace POWER B D YES YES Replace MAIN B D IC 100 Check MAIN B D JK406 OK YES NO Replace MAIN B D JK406 Making Revision 2009 2 1 23 25 LCD TV Symptom USB No Connect Problem Copyright ⓒ 2009 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only ...

Page 64: ... D P5001 Wafer Connector YES NO Replace it YES Replace IR B D Making Revision 2009 2 1 24 25 LCD TV Symptom Remote Control Problem Copyright ⓒ 2009 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only ...

Page 65: ... P5001 Wafer Connector YES YES NO Replace it Replace IR B D Making Revision 2009 2 1 25 25 LCD TV Symptom Intelligent Sensor Problem Copyright ⓒ 2009 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only ...

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