LG 26LG30R Service Manual Download Page 23

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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.

TMDS3_RX2-

TMDS3_RXC-

HPD_S/W_2

TMDS2_RXC-

R319

+5V_HDMI_2

HDMI_SEL1

TMDS3_RXC-

HDMI_C-

HDMI_SCL

HDMI_0-

10K

R351

HPD_MST_2

TMDS2_RX2-

+5V_HDMI_3

4.7K

R362

CEC_C

DDC_SCL1

CEC

TMDS1_RX1-

HDMI1_5V_DET

HDMI3_5V_DET

TMDS2_RXC-

0.01uF

C310

R344

SIDE_HDMI

10K

R300

0.01uF

C315

+3.3V_MULTI_MST

R310

+3.3V

CEC

DDC_SDA2

0.01uF

C314

TMDS1_RXC-

HDMI_1-

0.01uF

C316

10K

R328

HPD_S/W_1

0.01uF

C308

TMDS3_RX0-

HDMI_2-

HPD_S/W_3

TMDS3_RX0-

HDMI2_5V_DET

10K

R324

READY

R369

DDC_SCL3

+3.3V_MULTI_MST

+5V_HDMI_2

HPD_S/W_2

HPD_MST_1

CEC

BSS83

Q306

10K

R335

SIDE_HDMI

TMDS3_RX1-

R370

READY

4.7K

R375

READY

R373

TMDS1_RX0-

+3.3V_HDMI_SW

+5V_ST

4.7K

R361

R356

TMDS2_RX2-

+5V_HDMI_1

TMDS3_RX2-

R358

0.01uF

50V

READY

C307

TMDS2_RX0-

TMDS1_RX1-

4.7K

R374

KDS184S

KDS184

D300

10K

R329

TMDS2_RX1-

0.01uF

C311

0.01uF

C312

TMDS1_RX2-

+5V_HDMI_3

TMDS3_RX1-

HDMI_SEL2

+5V_HDMI_1

10K

R352

0.01uF

C309

R357

TMDS1_RXC-

R355

+5V_ST

+5V_HDMI_3

+5V_ST

10K

R301

TMDS1_RX2-

+3.3V_HDMI_SW

+5V_HDMI_1

TMDS1_RX0-

TMDS2_RX1-

HPD_S/W_1

R368

READY

10K

R325

R347

CEC

HDMI_SDA

DDC_SCL2

+5V_HDMI_2

HPD_S/W_3

R345

KDS184S

KDS184

D303

DDC_SDA1

R346

CDS3C30GTH

30V

D302

READY

HPD_MST_3

DDC_SDA3

KDS184S

KDS184

D301

R350

47K

R330

47K

R331

47K

R326

47K

R327

47K

R354

47K

R353

READY

R365

READY

R376

MMBD301LT1G

30V

D304

DDC_SDA2

DDC_SCL2

DDC_SDA1

DDC_SCL1

DDC_SDA3

DDC_SCL3

TMDS351PAG

IC302

SDA3

SCL3

GND_1

B31

A31

VCC_1

B32

A32

GND_2

B33

A33

VCC_2

B34

A34

GND_3

VSADJ

VCC_3

GND_4

VCC_4

GND_5

SCL_SINK

SDA_SINK

HPD_SINK

HPD1

SDA1

SCL1

B11

A11

VCC_5

B12

A12

GND_6

B13

A13

VCC_6

B14

A14

VDD

HPD2

SDA2

SCL2

B21

A21

VCC_7

B22

A22

GND_7

B23

A23

VCC_8

B24

A24

HPD3

READY

R383

0.01uF

50V

C301

0.01uF

50V

C313

0.01uF

50V

C300

51K

R333

30K

R334

READY

4.7K

R372

JP1115

JP1116

JP1117

JP1118

JP1119

JP1120

2SC3875S

RT1C3904-T112

Q300

2SC3875S

RT1C3904-T112

Q301

2SC3875S

RT1C3904-T112

Q307

SIDE_HDMI

DC1R019NBH

JK303

SIDE_HDMI

14 NC

13 CEC

5 DATA1_SHIELD

JACK_GND

12 CLK-

11 CLK_SHIELD

2 DATA2_SHIELD

19 HPD

18 +5V_POWER

10 CLK+

4 DATA1+

1 DATA2+

17DDC/CEC_GND

9 DATA0-

8 DATA0_SHIELD

3 DATA2-

16 SDA

7 DATA0+

6 DATA1-

15 SCL

47K

R371

+3.3V

200

R332

QJ41193-FEE2-7F

JK302

1 DATA2+

2 DATA2_SHIELD

3 DATA2-

4 DATA1+

5 DATA1_SHIELD

6 DATA1-

7 DATA0+

8 DATA0_SHIELD

DATA0-

10 CLK+

11 CLK_SHIELD

CLK-

13 CEC

14 NC

SCL

16 SDA

17 DDC/CEC_GND

18 +5V_POWER

19 HPD

20 JACK_GND

QJ41193-FEE2-7F

JK301

DATA2+

2 DATA2_SHIELD

DATA2-

4 DATA1+

5 DATA1_SHIELD

DATA1-

7 DATA0+

8 DATA0_SHIELD

DATA0-

10 CLK+

11 CLK_SHIELD

CLK-

CEC

SCL

SDA

17 DDC/CEC_GND

18 +5V_POWER

HPD

20 JACK_GND

AT24C02BN-10SU-1.8

IC300

GND

SDA

SCL

VCC

AT24C02BN-10SU-1.8

IC301

GND

SDA

SCL

VCC

AT24C02BN-10SU-1.8

IC303

SIDE_HDMI

GND

SDA

SCL

VCC

+5V_MULTI

KDS184S

KDS184

D305

+5V_ST

R359

READY

4.7K

R360

READY

+3.3V_MULTI_MST

100

R323

100

R322

100

R320

100

R321

100

R348

100

R349

R378

R377

R382

R381

R379

R380

4.7K

READY

R366

*TI Recommand

- > P u l l u p

HDMI

3 1 1

MSTAR N-EU

2 0 0 7 / 1 2 / 2 0

OPTION

SW_HPD : USE SW HPD (Default)

MST_HPD : USE MST HPD

**MULTI ITEM

1.24C02-SUB:0IMMRAL014D

2.SMD HDMI Jack-SUB:6612B00015B

EAX40043808

MSTAR LP81A

Summary of Contents for 26LG30R

Page 1: ...LCD TV SERVICE MANUAL CAUTION BEFORE SERVICING THE CHASSIS READ THE SAFETY PRECAUTIONS IN THIS MANUAL CHASSIS LP81A MODEL 32LG30R 32LG30R MA website http biz LGservice com Internal Use Only ...

Page 2: ...ll right reserved Only for training and service purposes 2 CONTENTS CONTENTS 2 SAFETY PRECAUTIONS 3 SPECIFICATION 6 ADJUSTMENT INSTRUCTION 9 TROUBLE SHOOTING 14 BLOCK DIAGRAM 19 EXPLODED VIEW 20 EXPLODED VIEW PARTS LIST 21 REPLACEMENT PARTS LIST 22 SVC SHEET ...

Page 3: ...fe 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 metallic parts such as antenna term...

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: ... Item Specification Measurement Result Remark Display Screen Device 26 wide Color Display Module Resolution 1366X768 HD 32 wide Color Display Module Resolution 1366X768 HD Aspect Ratio 16 9 LCD Module 26 TFT WXGA LCD 26 HD MAKER CMO 32 TFT WXGA LCD 32 HD MAKER LPL CPT CMO AUO SHARP Operating Environment 1 Temp 0 40 deg LGE SPEC 2 Humidity 0 85 Storage Environment 1 Temp 20 60 deg 2 Humidity 0 85 I...

Page 7: ...vailable Channel Receiving system Video Input 2EA AV Output 1EA S Video Input 1EA Component Input 2EA RGB Input 1EA HDMI Input 2EA 3EA Audio Input 5EA RS 232C USB Input 6 Component Video Input Y PB PR Resolution H freq kHz V freq kHz Pixel clock MHz Proposed 720 480 15 73 59 94 13 500 SDTV DVD 480I 525I 720 480 15 75 60 00 13 514 SDTV DVD 480I 525I 720 576 15 625 50 00 13 500 SDTV DVD 576I 625I 50...

Page 8: ...WXGA 1280_1024 63 595 60 0 108 875 SXGA Only FHD 1400_1050 65 160 60 0 122 50 SXGA Only FHD 1600_1200 74 077 60 0 130 375 UXGA Only FHD 1920_1080 66 647 59 988 138 625 WUXGA Only FHD LGE Internal Use Only Copyright 2008 LG Electronics Inc All right reserved Only for training and service purposes 8 8 HDMI input PC Spec out but display correctly at only HDMI DVI IN 1 via DVI to HDMI Cable Resolution...

Page 9: ... temperature and 65 10 of relative humidity if there is no specific designation 4 The input voltage of the receiver must keep 100 220V 50 60Hz 5 Before adjustment execute Heat Run for 15 minutes at RF no signal 3 S W program download 3 1 Preliminary steps 1 Download method 1 PCB Assy HD FHD 2 Connect the download jig to D sub jack 3 2 Download steps 1 Execute ISP Tool program in PC then a main win...

Page 10: ...ADC 1 Component Gain Offset Adjustment7 Convert to Component in Input source Input the Component Which has 720p 60Hz YPbPr signal 100 Color Bar MSPG 925F Model 217 Pattern 65 into Component Adjust by commanding AUTO_COLOR_ADJUST 0xF1 0x00 0x02 instruction 2 Confirmation We confirm whether 0xF3 offset 0xF4 gain address of EEPROM 0xBC is 0xAA or not If 0xF3 0xF4 address of EEPROM 0xBC isn t 0xAA we ...

Page 11: ...HDCP Key value is stored on EEPROM AT24C64 which is From 0x80 addresses of 0xA0 page AC off on and on HDCP button of MSPG925 and confirm whether picture is displayed or not of using MSPG925 HDCP Key value is different among the sets 7 Adjustment of White Balance 7 1 Purpose and Principle for adjustment of the color temperature Purpose Adjust the color temperature to reduce the deviation of the mod...

Page 12: ...he AV mode by remote control Push front AV or Input key 4 Input external pattern 85 white pattern 5 Push the ADJ key two times entering White Balance mode 6 Stick the sensor to the center of the screen and select each items Red Green Blue Gain and Offset using D E CH key on R C 7 Adjust R G B Gain using F G VOL key on R C 8 Adjust two modes Cool and Warm Fix the one of R G B and change the others ...

Page 13: ...data write SyncFlags HPeriodH HPeriodL VtotalH VtotalL SrcHTotalH SrcHTotalL SrcHStartH SrcHStartL SrcVStartH SrcVStartL HsyncPhase 3 Random Data write write the appointment Address of E2PROM 3 E2PROM Data Read 1 Signal TABLE 2 COMMAND SET Purpose To read 84h the appointment Address of E2PROM by 128 80h byte Delay 20m VAL 128 Bytes Delay 150ms EEPROM WRITE E8h 94 16 Byte Write 84 n h n byte Write ...

Page 14: ...to the front LED 2 Check process Plug in the power cord No Yes Is the power cord plugged in Connect the cable SC100 No Yes Are the line filter and PSU connected Replace the fuse No Yes Is the fuse of PSU normal F101 Connect a cable P1100 After all cables connect is removed to PSU the AC voltage marking is authorized on manual When ST BY 5V is not operated replace PSU No Yes Is it connected that PS...

Page 15: ...s minute discharge at Module Is the inverter VaVs on Is output the normality Low High voltage except Stand by 5V Yes No No Is the link cable normal Yes Is the IC801 s output normal Reconnect Panel line cable HD P403 FHD P402 No Replace the VSC No Yes Check the power Is video output of the Tuner normal Check TU500_Pin13 Is the input voltage normal Check Pin3 Is the I2C communication normal Check Pi...

Page 16: ...o input of the A V Jack normal Check R8044 Check the input source Same as Block A No 5 Unusual display from Side AV model Yes Is video input of the Side A V Jack normal Check R8043 Check the input source Same as Block A No 6 Unusual display from Side S Video mode Yes Is video input of the S Video Jack normal Check R8041 42 Check the input source Same as Block A No ...

Page 17: ...video input of the Com1 Jack normal Check R8011 12 13 Check the input source Change IC801 No 8 Unusual display from component 2 model Yes Is video input of the Com2 Jack normal Check R8030 32 33 Check the input source Change IC801 No 9 Unusual display from RGB model Yes Is video input of the Com2 Jack normal Check R8035 37 39 Check the input source Change IC801 No ...

Page 18: ... the Speaker cable No Replace IC600 No Replace IC801 No Yes Yes All input mode is no sound All input mode is no sound Is the speaker cable normal Is the speaker on it menu Yes Only AV COM2 PC input is no sound Is the output of IC600 normal Yes Yes Only RF is no sound Yes Is IC801 operated normality Yes Replace IC601 Replace Main B D No Is IC601 operated normality Yes 10 No Sound 1 Symptom 1 LED is...

Page 19: ...10 Sub Decoder NTP3000A Digital Audio AMP MAIN NVM MC74HC4066 Audio SW LM324 X4 AMP SERIAL FLASH BD2041 Protect IC EDID NVM DDC HDP CEC TMDS HDMI in DDC HPD CEC TMDS HDMI in TMDS HDMI in USB AV I O Data I O 5V CVBS OUT 656 IN SW_RESET PART_I2C PART_I2C SW_RESET I2S OUT LVDS MPEG RX TX MPEG RESET I2S IN 656 IN TMDS HDMI in DDC HPD CEC DDC HPD CEC CEC not through HDMI MUX direct JACK to MAIN IC DDC ...

Page 20: ...y Copyright 2008 LG Electronics Inc All right reserved Only for training and service purposes 20 300 200 510 121 500 120 122 400 401 800 801 802 804 803 530 521 540 821 805 550 910 904 902 901 905 903 900 830 EXPLODED VIEW ...

Page 21: ...B_SDA DSUB_SCL 0 1uF C100 PC_G CDS3C30GTH 30V D114 0 1uF C102 75 R118 4 7K R112 68 R115 0 1uF C101 PC_R PC_B PC_VS 68pF C103 PC_HS 0 1uF C105 4 7K R113 68pF C104 CDS3C30GTH 30V D113 100 R124 100 R128 4 7K R150 READY 5V_ST 100 R129 100 R130 0 1uF C110 0 1uF C106 100 R131 OPT C111 TXD 0 1uF C108 0 1uF C109 OPT C112 RXD CDS3C30GTH 30V D121 0 1uF C107 4 7K R151 READY 3 3V_MST CDS3C30GTH 30V D120 5V_ST...

Page 22: ...5 SIDE_Y 75 R246 SIDE_C SD05 D217 SD05 D218 S_VIDEO_DET SD05 D219 0 R214 HOTEL_OPT 0 R213 HOTEL_OPT SPK_R _HOTEL SPK_R _HOTEL 12K R248 12K R250 10K R247 10K R249 OPT C210 READY PPJ150 09 JK200 3A RD O_SPRING1 2A RD 1P_CAN1 4A RD CONTACT1 2B WH 1P_CAN1 3B WH 0_SPRING1 2C YL 1P_CAN1 3C YL O_SPRING1 4C YL CONTACT1 2D RD 1P_CAN2 3D RD O_SPRING2 4D RD CONTACT2 2E WH 1P_CAN2 3E WH 0_SPRING2 2F YL 1P_CAN...

Page 23: ... DDC_SCL1 DDC_SDA3 DDC_SCL3 TMDS351PAG IC302 1 SDA3 2 SCL3 3 GND_1 4 B31 5 A31 6 VCC_1 7 B32 8 A32 9 GND_2 10 B33 11 A33 12 VCC_2 13 B34 14 A34 15 GND_3 16 VSADJ 17 Y4 18 Z4 19 VCC_3 20 Y3 21 Z3 22 GND_4 23 Y2 24 Z2 25 VCC_4 26 Y1 27 Z1 28 GND_5 29 SCL_SINK 30 SDA_SINK 31 HPD_SINK 32 S1 33 S2 34 EQ 35 HPD1 36 SDA1 37 SCL1 38 B11 39 A11 40 VCC_5 41 B12 42 A12 43 GND_6 44 B13 45 A13 46 VCC_6 47 B14 ...

Page 24: ... 2 16 11 6 1 20 15 10 5 21 22 23 24 25 26 3 3K R413 0 1uF C400 0 HD R438 5V_ST OPT READY C402 10K R440 IR OUT 10K R443 IR OUT 5V_ST 10K R441 IR OUT 47K R439 IR OUT 22 R442 IR OUT IR 10K R414 LG60 10K READY R403 22uF 16V C406 3 3V_MST 5 6 B ZD400 READY 2SC3052 Q405 IR OUT E B C 2SC3052 Q404 IR OUT E B C 2SA1530A T112 1R Q406 LG60 E B C 5V_ST_SW 3 3K R445 LG60 3 3K R444 LG60 0 CPT R428 0 READY R415 ...

Page 25: ...Y R553 SCL_TUNER SDA_TUNER 5V_TUNER 4 7K R504 4 7K R508 0 R514 330 R506 330 R505 4700pF C506 220 R521 2SA1530A T112 1R Q502 E B C RT1C3904 T112 Q501 E B C 0 R519 0 R518 TAFT Z703D TU500 NON EU TUNER 14 AFT 13 V OUT 5 RF_AGC 12 NC_4 11 AS 2 GND_1 19 NC_7 18 NC_6 10 CLOCK 4 NC_2 1 NC_1 17 NC_5 9 DATA 8 GND_2 3 B 5V 16 SIF OUT 7 NC_3 6 TP 33V_OPTION 15 A OUT 21 SHIELD 20 NC_8 BLM18BD102SN1D L502 READ...

Page 26: ..._1 46 PGND1B_2 47 OUT1B_1 48 OUT1B_2 49 PVDD1B_1 50 PVDD1B_2 51 PVDD1A_1 52 PVDD1A_2 53 OUT1A_1 54 OUT1A_2 55 PGND1A_1 56 PGND1A_2 0 47uF C640 22000pF C623 0 1uF C637 1uF C624 10uF 16V C600 3 3V 100pF C601 SCL_Part 1000pF C635 1000pF C634 SPK_L 330uF 35V C612 1000pF C631 0 HOTEL_OPT R642 SPK_R 100 R601 16V_NTP 1000pF C606 0 01uF C638 16V_NTP 4 7K R627 16V_NTP SPK_R 100 R602 I2S_MCLK 0 01uF C647 1 ...

Page 27: ...79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 HY57V641620FTP IC704 26 A3 27 VDD3 28 VSS1 29 A4 30 A5 31 A6 32 A7 33 A8 34 A9 35 A11 36 NC1 37 CKE 38 CLK 39 UDQM 40 NC2 41 VSS2 42 DQ8 43 VDDQ3 44 DQ9 45 DQ10 46 VSSQ3 47 DQ11 48 DQ12 49 VDDQ4 50 DQ13 17 CAS 3 VDDQ1 6 V...

Page 28: ...113 114 VDDM_114 115 MDATA 7 116 MDATA 6 117 MDATA 5 118 MDATA 4 119 VDDM_119 120 MDATA 3 121 MDATA 2 122 MDATA 1 123 MDATA 0 124 DQS 0 125 LDQM 126 UDQM 127 MVREF 128 MCLKE 129 MCLKZ 130 MCLK 131 BADR 1 132 BADR 0 133 RASZ 134 GND_134 135 VDDM_135 136 AVDD_MEMPLL 137 CASZ 138 WEZ 139 MADR 0 140 MADR 1 141 MADR 2 142 MADR 3 143 MADR 4 144 MADR 5 145 MADR 6 146 MADR 7 147 VDDM_147 148 GND_148 149 V...

Page 29: ...B25DC256163CE 4 IC900 26 BA0 27 BA1 28 A10 AP 29 A0 30 A1 31 A2 32 A3 33 VDD_3 34 VSS_1 35 A4 36 A5 37 A6 38 A7 39 A8 40 A9 41 A11 42 A12 NC_5 43 NC_6 44 CKE 45 CK 46 CK 47 UDM 48 VSS_2 49 VREF 50 NC_7 17 A13 NC_2 3 VDDQ_1 6 VSSQ_1 16 LDQS 15 VDDQ_3 14 NC_1 13 DQ7 12 VSSQ_2 11 DQ6 10 DQ5 9 VDDQ_2 8 DQ4 7 DQ3 4 DQ1 5 DQ2 25 NC_4 24 CS 23 RAS 2 DQ0 22 CAS 21 WE 1 VDD_1 20 LDM 19 NC_3 18 VDD_2 51 UDQ...

Page 30: ...7 NC_1 8 AVD_1 9 YMUX3 10 YMUX2 11 YGND 12 YMUX1 13 YMUX0 14 AVS_1 15 CIN0 16 AVD_2 17 AVS_2 18 NC_2 19 VSS_1 20 VS 21 HS 22 MPOUT 23 CLKX2 24 VSSE_1 25 VDDE_2 26 VD 15 27 VD 14 28 VD 13 29 VD 12 30 VD 11 31 NC_3 32 VDD 33 VD 10 34 VD 9 35 VD 8 36 VD 7 37 VD 6 38 VD 5 39 VD 4 40 VD 3 41 VD 2 42 VSS_2 43 NC_4 44 VD 1 45 VD 0 SIAD0 46 VSSE_2 47 XTI 48 XTO 3 3V 47uF16V C1010 SDA_Part 0 01uF C1001 27M...

Page 31: ...8 ACD 13 GND 8 GND 3 GND 17 Error out 12 5V 7 GND 2 16V 16 AGND 11 5V 6 12V 1 16V 20 Inverter ON 15 GND 10 5V 5 12V 21 A Dim 22 PWMDim 23 Select 24 SYNC MBR230LSFT1G 30V D1100 5 6K R1107 18K R1106 33K R1140 33K R1141 2 2K R1152 2 2K R1154 2 2K R1153 330 1 R1194 USB 100uF 16V C1151 USB 5V_USB AZ1117H ADJTRE1 EH11A IC1107 USB 2 OUTPUT 3 INPUT 1 ADJ GND 0 1uF C1120 USB 110 1 R1195 USB 1 10W 100 5 R11...

Page 32: ...Feb 2008 Printed in Korea P NO MFL41394429 ...

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