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LG 42PQ1100, Service Manual

The LG 42PQ1100 brings stunning visuals and immersive entertainment to your home. Unlock the full potential of this TV with the comprehensive Service Manual, available for free download at manualshive.com. With detailed instructions and troubleshooting tips, this manual ensures seamless usage and optimal performance for your LG 42PQ1100.

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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.

0 . 1 u F
50V

C1166

0 . 0 1 u F

50V

C1138

0 . 1 u F

50V

C1149

0 . 1 u F
50V

C1129

1/4W

0

5%

R1133

0 . 1 u F
50V

C1147

0 . 1 u F
50V

C1139

0 . 1 u F
50V

C1170

47uF

16V

C1165

VAVS_ON

001:V15

0 . 1 u F
50V

C1168

+5V_ST

0 . 1 u F

C1107

+3.3V_AVDD_LPLL

+3.3V_AVDD_MPLL

0 . 0 1 u F

50V

C1196

0 . 1 u F
50V

C1127

0 . 1 u F
50V

C1174

+1.25V_MULTI

0 . 1 u F
50V

C1191

AZ1117D-1.8TRE1 

IC1104

1

ADJ/GND

2

OUTPUT

3

INPUT

0 . 0 1 u F

50V

C1169

0 . 0 1 u F

50V

C1123

+5V_GENERAL

0 . 0 1 u F

50V

C1144

0 . 1 u F
50V

C1195

1/4W

0

5%

R1134

0 . 1 u F
50V

C1145

0 . 1 u F
50V

C1153

0 . 1 u F
50V

C1186

+5V_CI

+1.25V_VDDC

AZ1085S-ADJTR/E1

IC1107

1

ADJ/GND

2

OUTPUT

3

INPUT

100uF

16V

C1130

100

R1157

+3.3V_AVDD_ADC

22K

R1159

OPT

4.7K

R1148

+3.3V_AVDD_OTG

+3.3V_VDDP_ST

0 . 1 u F
50V

C1133

0 . 1 u F
50V

C1189

+3.3V_CI

+5V_ST

0 . 1 u F

C1109

+3.3V_AVDD_AU

10K

R1122

+1.25V_MULTI

47uF

16V

C1167

0 . 1 u F
50V

C1141

15pF
50V

C1103

15pF

50V

C1112

0 . 1 u F
50V

C1183

0 . 1 u F
50V

C1181

+5V_SYS

2SC3875S(ALY)

Q1101

E

B

C

5V_MNT

001:V11

0 . 1 u F
50V

C1175

+5V_ST

100

R1143

+1.8V_TU

39

1%

R1139

0 . 1 u F
50V

C1172

100uF

25V

C1106

0 . 1 u F
50V

C1197

0 . 1 u F
50V

C1151

100uF

16V

C1182

0 . 1 u F
50V

C1136

0 . 1 u F
50V

C1124

0 . 1 u F
50V

C1131

0 . 1 u F
50V

C1190

22K

R1125

0 . 1 u F
50V

C1193

P_17V

0 . 0 1 u F

50V

C1178

AC_DET

0 1 0 : C 1 2 ; 0 0 1 : V 1 0

RL_ON

001:V15

+3.3V_TU

0 . 1 u F
50V

C1194

+1.8V_DDR2_MAIN

0 . 0 1 u F

50V

C1171

AZ1117D-3.3TRE1 

IC1103

1

ADJ/GND

2

OUTPUT

3

INPUT

0 . 0 1 u F

50V

C1140

100uF
16V

C1108

0 . 1 u F
50V

C1179

+3.3V_AVDD

+3.3V_AVDD_MEMPLL

0 . 1 u F
50V

C1134

+3.3V_AVDD

+3.3V_AVDD_VIF

+5V_TU

0 . 4 7 u F

C1102

0 . 1 u F
50V

C1105

+1.25V_AVDD_DVI

100

R1156

+5V_ST

0 . 0 1 u F
50V

C1173

0 . 0 1 u F

50V

C1132

0 . 0 1 u F

50V

C1135

+3.3V_VDDP_ST

+3.3V_VDDP

P_12V

0 . 1 u F
50V

C1125

5V_ON

001:V12

AZ1085S-ADJTR/E1

IC1102

1

ADJ/GND

2

OUTPUT

3

INPUT

+3.3V_AVDD_DVI

+1.8V_EXPANDER

+3.3V_EXPANDER

100uF

16V

C1126

47uF

16V

C1148

47uF
16V

C1150

POWER_ON/OFF1

0 . 1 u F

50V

C1155

+5V_SYS

0 . 1 u F
50V

C1142

100uF
16V

C1156

+3.3V_AVDD

+3.3V_AVDD

+3.3V_AVDD

1K

1%

R1130

22

1%

R1128

+3.3V_VDDP_ST

AZ1085S-3.3TR/E1

IC1106

1

ADJ/GND

2

OUTPUT

3

INPUT

+5V_SYS

1/10W

360

1%

R1120

1/10W

4.3K

1%

R1121

SMW200-24C

P1100

19

14

9

4

18

13

8

3

17

12

7

2

16

11

6

1

20

15

10

5

21

22

23

24

0 . 1 u F

C1201

100uF
16V

C1200

+5V_MULTI

+5V_MULTI

100

R1160

RSR025P03

Q1102

S

D

G

0 . 1 u F

50V

C1111

0 . 1 u F
50V

C1203

0 . 1 u F
50V

C1202

KEY_ON

0 0 4 : T 8

15pF

50V

C1206

47uF

16V

C1210

+5V_TU

0 . 1 u F
50V

C1209

0 . 1 u F
50V

C1207

10uF
16V

C1159

OPT

1/10W

1.8K

5%

R1126

120-ohm

L1103

CB4532UK121E

470uF
16V

C1188

100uF
16V

C1122

220uF
16V

C1110

CB3216PA501E

L1119

CB3216PA501E

L1120

CB3216PA501E

L1117

CB3216PA501E

L1114

CB3216PA501E

L1100

CB3216PA501E

L1102

CB3216PA501E

L1101

CB3216PA501E

L1125

CB3216PA501E

L1109

CB3216PA501E

L1106

CB3216PA501E

L1121

CB3216PA501E

L1126

CB3216PA501E

L1108

CB3216PA501E

L1115

CB3216PA501E

L1111

CB3216PA501E

L1113

CB3216PA501E

L1116

CB3216PA501E

L1112

0 . 1 u F
50V

C1212

0 . 1 u F
50V

C1128

15pF
50V

C1104

100uF

16V

C1213

AP2121N-3.3TRE1 

IC1105

1

GND

2

VOUT

3

VIN

82

1%

R1140

10uF

16V

C1137

Power

1 1     1 1

R2

V 0   =   1 . 2 5 ( 1 + R 2 / R 1 )

+3.3V_AVDD

Stand-by&Multi +3.3V_+1.25V_MST_Core

V 0   =   1 . 2 5 ( 1 + R 2 / R 1 )

TU3.3V & +1.8V

+1.8V_DDR

POWER

R1

R2

DDR2 1.8V POWER change to ADJ TYPE_080402

R1

EXPANDER POWER 3.3V & 1.8V

Change LDO because of PM REV. 

2 0 0 8 .   0 9 .   0 4

2 0 0 8 .   0 7 .   1 0

Change LDO because of PM REV.

M U S T   B E   c h e c k e d   c u r r e n t   s p e c .

P M   C o n t r o l

EAX57566204

PM for GPIO4

⁄

!

B

5V MULTI

KEY ON(NEW POWER B/D

FOR 0.2W

      2 0 0 9 . 0 4 . 1 5

OWER

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

LGE Internal Use Only 

Summary of Contents for 42PQ1100

Page 1: ... READ THE SAFETY PRECAUTIONS IN THIS MANUAL CHASSIS PD92A MODEL 42PQ1100 42PQ1100 ZE North Latin America http aic lgservice com Europe Africa http eic lgservice com Asia Oceania http biz lgservice com Internal Use Only P NO MFL58138612 0906 REV00 Printed in Korea ...

Page 2: ...Only Copyright 2009 LG Electronics Inc All right reserved Only for training and service purposes CONTENTS CONTENTS 2 SAFETY PRECAUTIONS 3 SPECIFICATION 4 ADJUSTMENT INSTRUCTION 7 BLOCK DIAGRAM 13 EXPLODED VIEW 16 SVC SHEET ...

Page 3: ... s Neck 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 phone jacks etc If the exposed meta...

Page 4: ...eceiver must be operated for about 20 minutes prior to the adjustment 3 Test Method 1 Performance LGE TV test method followed 2 Demanded other specification Safety CE IEC specification EMC CE IEC Chassis PD92A Albania Austria Belgium Bosnia Bulgaria Croatia Czech Denmark Estonia Finland France Germany Greece Hungarym Ireland Italy Kazekhstan Latvia Lthuania Luxembourg Morocco Netherlands Norway Po...

Page 5: ...emark 50 inch Wide Color Display Module 16 9 PDP50XG2 RGB Closed Type 1 Temp 0 40deg 2 Humidity 20 80 3 Temp 20 60deg 4 Humidity 10 90 AC100 240V 50 60Hz PDP LGE SPEC Maker LG Display Screen Device Aspect Ratio PDP Module Operating Environment Storage Environment Input Voltage 1 2 3 4 5 6 No Item Specification Remark 42 inch Wide Color Display Module 16 9 PDP42XG2 RGB Closed Type 1 Temp 0 40deg 2 ...

Page 6: ...ch Denmark Estonia Finland France Germany Greece Hungarym Ireland Italy Kazekhstan Latvia Lthuania Luxembourg Morocco Netherlands Norway Poland Portugal Romania Russia Sebia Slovakia Slovenia Spain Sweden Swtzerland Turkey UK Ukraine 1 PAL BG 2 PAL DK 3 PAL I I 4 DVB T ID TV 5 SECAM L L Analog Upper Heterodyne Digital COFDM PAL SECAM PAL SECAM NTSC PAL SECAM NTSC Y Cb Cr Y Pb Pr RGB PC HDMI DTV SO...

Page 7: ...ness uniformity 10 0 10 85IRE 216Gray 100 Window White Pattern Picture Vivid Medium X 0 270 0 285 0 300 White Y 0 278 0 293 0 308 White 85IRE 216Gray X 0 635 0 640 100 Window White Pattern 4 Color Red Y 0 318 0 330 0 340 R G B 100IRE 255Gray Coordinate X 0 242 0 300 0 305 100 Window White Pattern Green Y 0 595 0 600 Picture Vivid Medium X 0 150 0 158 100 Window Blue Y 0 060 0 070 85IRE 100 Window ...

Page 8: ...ctivated HEAT run without signal generator in this mode Single color pattern WHITE of HEAT RUN MODE uses to check panel Caution If you turn on a still screen more than 20 minutes Especially digital pattern cross hatch pattern an after image may be occur in the black level part of the screen 3 PCB assembly adjustment method Caution Using power on button of the control R C power on TV O Auto control...

Page 9: ...rolled on production line ex Week 03 03 Year 2009 13 ⓒ Model Name Hex ⓓ Checksum Changeable by total EDID data ⓔ Vender ID In case of 42 50PQ1000 1100 HDMI 1 is ONLY applied Product ID MODEL NAME Product ID HEX EDID Table 42PQ3000 40433 9DF1 F19D 42PQ6000 40431 9DEF EF9D 50PQ3000 50250 C44A 4AC4 50PQ6000 50248 C448 48C4 42PQ2000 40467 9E13 139E 50PQ2000 50276 C464 64C4 50PS3000 50278 C466 66C4 50P...

Page 10: ...djustment as same as Vs voltage which on label of panel right top deviation 0 5V 8 Download Serial Number RS 232C 1 Press Power on key of service R C Baud rate 115200 bps 2 Connect RS232 Signal Cable to RS 232 Jack 3 Write Serial number by use RS 232 4 Must check the serial number at the Diagnostics of SET UP menu Refer to below 6 SET INFORMATION 9 Adjustment of White Balance 9 1 Required Equipmen...

Page 11: ...B 9 4 Auto control Interface and Directions 1 Adjust in the place where the influx of light like floodlight around is blocked Illumination is less than 10ux 2 Measure and adjust after sticking the Color Analyzer CA 100 CA210 to the side of the module 3 Aging time After aging start keep the Power on no suspension of power supply and heat run over 5 minutes 9 5 Auto Adjustment Map RS232C 10 Checking...

Page 12: ...ata is automatically detecting 3 Show the message Copying files from memory 4 Updating is staring 5 Updating Completed The TV will restart automatically After turn on TV Please press IN STOP button on ADJ Remote control IF you don t have ADJ R C enter Factory Reset in OPTION MENU 6 When TV turn on check the Updated version on Diagnostics MENU 12 LGE Internal Use Only Copyright 2009 LG Electronics ...

Page 13: ...C802 PCM_CD_ON CI_CD_1 2 I2S MUTE AMP_RST P402 LED_G R IR Flash Memory 16MB IC103 SC1_CVBS_IN SC2_CVBS_IN SC1_TV_VOUT DTV MNT_V_OUT SC1_L R_IN TV_L R_OUT DTV MNT_L R_OUT PDP Panel TS_Serial RS232C_Tx Rx RS232C_Tx Rx I2C_D_TU SPDIF_OUT DDR Memory 512Mb IC300 SPI_SCK SPI_SDI SPI_SD0 SPI_CSN_1 EEPROM IC111 SYSTEM_SCL SYSTEM_SDA MDATA 0 16 MDATA 17 31 P1100 17V 12V 5V SIDE_Y C_IN SIDE_CVBS_IN SIDE_L R...

Page 14: ...MST 1 3V_VDDC MP2305DS AZ1117H 1 2 1 2V_PVSB VSB IC DDR 5VST FET Q504 Power_SW VSB_Ctrl 5V_MST AVDD_MPLL VDDP AVDD_MEMPLL AVDD_ADC AVDD_DM AVDD_OTG AVDD_AU AVDD_LPLL AVDD_33 AVDD_DDR 1 3V_VDDC AVDD_MLINK DDR1 8V 3 3V_PVSB 1 2V_DVDD 3 3V_DVDD 3 3V_AVDD USB MIC2019YM6 5V 5V_USB HDMI switch 12V KIA7808AF 5V_TU Tuner Audio AMP HDCP NVRAM Serial Flash 17V EEPROM RGB MAX3232 EEPROM HDMI L312 L326 L313 L...

Page 15: ... 15 LGE Internal Use Only Copyright 2009 LG Electronics Inc All right reserved Only for training and service purposes HW Power On Sequence LGE2872A ...

Page 16: ... 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 manufacturer IMPORTANT SAFETY NOTICE ...

Page 17: ... 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 manufacturer IMPORTANT SAFETY NOTICE ...

Page 18: ...IO13 27 GPIO14 28 GPIO15 29 HWRESET 30 XIN 31 I2C_SDA 32 I2C_SCL 33 GPIO16 34 GPIO17 35 GPIO18 36 GPIO19 37 GPIO20 38 GPIO21 39 GPIO22 40 GPIO23 41 GPIO24 42 GPIO25 43 GPIO26 44 GPIO27 45 GPIO28 46 GPIO29 47 GPIO30 48 GPIO31 MSD237HFG SATURN4 NO SD HD DIVX IC100 GPIO148 U2 GPIO147 T2 GPIO146 P4 GPIO145 P3 GPIO144 N6 GPIO16 F3 GPIO14 E9 GPIO4 V11 GPIO3 V10 RXA0N H2 RXA0P H1 RXA1N J2 RXA1P J1 RXA2N ...

Page 19: ...DD_VIF P7 AVDD_DM P13 VDDP_1 N8 VDDP_2 N12 VDDP_3 P11 VDDP_4 P12 AVDD_DDR_1 G11 AVDD_DDR_2 G12 AVDD_DDR_3 G13 AVDD_DDR_4 G14 AVDD_DDR_5 H14 AVDD_DVI G10 VDDC_1 H9 VDDC_2 H10 VDDC_3 J15 VDDC_4 K15 VDDC_5 L15 VDDC_6 M15 VDDC_7 N10 VDDC_8 N11 VDDC_9 P10 MSD237HFG SATURN4 NO SD HD DIVX IC100 LVA0M V20 LVA0P V19 LVA1M W20 LVA1P Y20 LVA2M Y19 LVA2P W19 LVACKM Y18 LVACKP W18 LVA3M Y17 LVA3P W17 LVA4M Y16...

Page 20: ...TA 12 DDR2_B_MADR 9 DDR2_A_MADR 5 0 1 u F C327 B_MDATA 9 A_MDATA 1 A_MADR 9 0 1 u F C309 DDR2_B_MDATA 1 DDR2_A_MADR 4 DDR2_B_MADR 6 DDR2_A_MDATA 3 A_BA1 DDR2_B_MDATA 11 DDR2_A_MDATA 7 1 16W 56 AR313 DDR2_A_MDATA 10 DDR2_A_MDATA 12 DDR2_B_MADR 2 DDR2_B_MDATA 15 0 1 u F C333 0 1uF 50V C319 0 1uF 50V C300 B_BA2 A_BA2 H5PS5162FFR S6C HYNIX EAN55705501 DDR2SDRAM IC300 FOR HYNIX J2 VREF J8 CK H2 VSSQ2 B...

Page 21: ...6V C411 10K R407 BG2012B121F L406 BG2012B121F L403 12507WS 15L P402 1 IR 2 GND 3 KEY1 4 KEY2 5 KEY_ON 6 GND 7 SCL_EYE 8 SDA_EYE 9 GND 10 5V_ST 11 5V_Multi 12 GND 13 LED_RED 14 LED_GRE 16 GND 15 PWM 10K R420 33 R429 OPT 33 R431 OPT SCL_TRACE_GRRENEYE 004 T7 SDA_TRACE_GRRENEYE 004 T7 33 R417 OPT 33 R416 OPT GREENEYE_CTRL 001 E4 0 R432 OPT SDA_TRACE_GRRENEYE 004 AA16 SCL_TRACE_GRRENEYE 004 AA16 PCA95...

Page 22: ...20 VDDC_4 21 VDDA_6 22 GND_6 23 VDDD_1 24 TESTMODE 25 DDI1 26 VDDC_5 27 DDI2 28 ADDRSEL 29 X2 30 GND_7 31 X1 32 EXTREF 33 VDDD_2 34 SCL 35 SDA 36 GND_8 37 RESET 38 VI2C 39 VDDC_6 40 VREF_N 41 VREF_P 42 VDDC_7 43 VDDC_8 44 REXT 45 VDDA_7 46 GND_9 47 VDDC_9 48 VDDA_8 39pF C531 0603CS R27XGLW 270nH L505 120pF C530 0603CS R39XGLW 390nH L504 1008CS 821XGLC 820nH C546 27pF 50V C540 27pF 50V C543 22K R53...

Page 23: ... INPUT2 7 OUT2 8 OUT3 9 INPUT3 10 INPUT3 11 GND 12 INPUT4 13 INPUT4 14 OUT4 DTV MNT_L_OPOUT 006 Y13 10K R625 5 6K R631 DTV MNT_L_OUT 001 AB18 DTV MNT_R_OUT 001 AB18 DTV MNT_R_OPOUT 006 Y10 6 8K R659 6800pF OPT C615 10K R664 6800pF OPT C614 6 8K R662 33pF C612 10K R658 33pF C606 5 6K R653 P_12V TV_R_OUT 001 AC15 TV_L_OUT 001 AC15 5 6K R651 6800pF OPT C605 6 8K R624 33pF C604 TV_R_OPOUT 006 H8 10K R...

Page 24: ...GN CONTACT 2A GN 1P_CAN 3A GN O_SPRING 2B BL 1P_CAN 5B BL C_LUG_L 2C RD 1P_CAN1 5C RD C_LUG_L 2D WH 1P_CAN 5D WH C_LUG_L 2E RD 1P_CAN2 4E RD CONTACT 3E RD O_SPRING RS232C_RXD 001 O20 SIDE_C_IN 001 M7 SIDE_CVBS_IN 001 M7 PC_SER_CLK 004 H12 75 R726 FULL SPEC JP711 0 R781 10 R771 CDS3C05GTA 5 6V OPT D707 1K R770 USB_DP 001 W9 10K R752 FULL SPEC 10K R736 FULL SPEC 82pF 50V C740 FOR RGB ROM D L USB DOW...

Page 25: ...19 OE2 20 VCC BUF_TS_SYNC BUF_TS_VAL BUF_TS_DATA 0 BUF_TS_CLK 3 3V_CI 0 1uF 16V C800 10K R818 22K R821 5V_CI_CTL 5V_CI 0 1uF 50V C804 100uF 16V C806 0 1uF 50V C807 5V_CI_Vs 0 1uF 50V C805 BUF_TS_CLK BUF_TS_DATA 0 BUF_TS_SYNC BUF_TS_VAL TU_TS_DATA 1 7 2010_A4 33 AR834 2010_A4 33 AR836 2010_A4 33 AR835 2010_A4 33 AR837 33 AR802 33 AR801 33 AR800 33 AR805 33 AR804 33 AR803 33 AR831 33 AR832 RSR025P03...

Page 26: ...0 1uF 50V C901 FULL SPEC 2SC3875S ALY Q901 E B C 47K R913 47K R916 0 1uF C903 CK _HDMI3 001 O14 D2 _HDMI1 001 O17 D0 _HDMI3 001 O15 OPT D902 DDC_SCL_3 009 AB8 001 V5 DDC_SDA_3 009 R8 001 V5 3 3V_VDDP_ST DDC_SCL_1 009 N17 001 V6 100 R923 FULL SPEC 5V_HDMI_2 0 1uF C905 FULL SPEC KDS184 D905 FULL SPEC A2 C A1 47K R922 FULL SPEC 47K R917 FULL SPEC DDC_SCL_2 009 G8 001 V5 100 R921 FULL SPEC DDC_SDA_2 0...

Page 27: ...01uF C1004 2K OPT R1007 MS_LRCH 001 Z12 3 3V_DVDD P_17V 10uF 16V C1010 3 3V_AU_AVDD 0 01uF C1037 33 R1009 0 01uF C1021 1K R1003 P_17V 10uF 16V C1001 0 01uF C1038 33pF OPT C1008 AVSS 3 3 R1018 1uF C1017 0 OPT R1011 33pF OPT C1007 1000pF 50V OPT C1000 4700pF C1013 3 3V_CI 0 R1001 OPT AVSS 0 33uF C1029 0 33uF C1030 0 33uF C1033 0 33uF C1034 0 33uF C1032 0 33uF C1031 47uF C1043 47uF C1026 47uF C1045 4...

Page 28: ... 1 25V_AVDD_DVI 100 R1156 5V_ST 0 01uF 50V C1173 0 01uF 50V C1132 0 01uF 50V C1135 3 3V_VDDP_ST 3 3V_VDDP P_12V 0 1uF 50V C1125 5V_ON 001 V12 AZ1085S ADJTR E1 IC1102 1 ADJ GND 2 OUTPUT 3 INPUT 3 3V_AVDD_DVI 1 8V_EXPANDER 3 3V_EXPANDER 100uF 16V C1126 47uF 16V C1148 47uF 16V C1150 POWER_ON OFF1 0 1uF 50V C1155 5V_SYS 0 1uF 50V C1142 100uF 16V C1156 3 3V_AVDD 3 3V_AVDD 3 3V_AVDD 1K 1 R1130 22 1 R112...

Page 29: ......

Page 30: ...ge Noise dark picture 3 4 Picture broken Freezing 4 5 Vertical bar Horizontal Bar 5 6 B Power Problem No Power Not turn on 6 7 Turn off Instant under watching 7 9 E General function Problem Remote control Local switch checking 9 First of all Check whether there is SVC Bulletin in GCSC System for these model Copyright ⓒ 2009 LG Electronics Inc All right reserved Only for training and service purpos...

Page 31: ...eck Control Board LED on Crystal X101 1 8V 3V 5V FET Rom update 2 Replace Control B D SVC R C Pattern Check Sound Sound OK Y Close Y Move No Picture No sound Section Check LVDS Cable Replace Main B D Normal N Y N Move Power problem Section Normal Normal Move Power problem Section N First of all Check whether all of cable between board was inserted properly or not Main B D Power B D Power B D Y sus...

Page 32: ...tern by using TILT key on SVC R C Normal N Check Sound Sound OK Y N Move No Picture Sound Ok Section Close Y Check LVDS Cable Replace Main B D Normal Y N Replace Main B D Normal Check Input signal RF Cable connection SCART Cable connection HDMI Cable connection Component Cable Normal Y N Repair Replace IR B D Copyright ⓒ 2009 LG Electronics Inc All right reserved Only for training and service purp...

Page 33: ...lace Y Sus B D Normal Picture Y N 1 Check Control B D 2 Replace Board Normal Picture Check Y Drive B D Replace B D Y Close N Dark Picture Normal Picture Y Replace Module N Close 1 Check Z Sus Board 2 Replace Board Check Picture mode setting Picture Noise Normal Picture Y N Close Y N Check RF Cable Connection Check Tuner Replace Normal Picture Check Discharge resistance 10Ω 2 3ea on Power B D befor...

Page 34: ...ker TV etc SVC Bulletin Replace Main B D Check Tuner soldering Normal 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 09 years n...

Page 35: ...nnection 2 Eliminate foreign material on Connector N CTRL B D Control board Check connection of Connector COF TCP on CTRL B D X B D Check connection of Connector FPC on Y Drive B D 1 Connector re connection 2 Eliminate foreign material on FPC 1 Check Y Drive B D 2 Replace Board Normal Picture N Y Close Replace Module 1 Check CTRL B D 2 Replace Board Normal Picture N Y Close N Y Normal Horizontal L...

Page 36: ...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 N Normal Close Y Check ST BY 5V on Power Board Normal Voltage N Normal Signal Y Check Power B D Replace Power B D Check AC DET Signal on Power B D Check RL_ON Signal on Power B D N Normal Signal Y Check Main B D Replace Main B ...

Page 37: ...eck Y Sus Z Sus Board especially Short or Open 2 Replace defective B D To check Power B D Protection Check Power Off History RCU Off Turn off Under watching Off Timer Set Off timer Function off KEY Off 2HOUR Off NO Signal Off Y N Don t appear Power Off History Move No Power problem Section This is not problem Normal operation Copyright ⓒ 2009 LG Electronics Inc All right reserved Only for training...

Page 38: ...nput signal Cable connection Cable open RF external HDMI SCART Normal Sound Y Close Check AVL off on Clear voiceⅡ off on Y Normal Sound N Close N Problem in all input Problem in only DTV Case 1 Problem in external input Case 2 SCART HDMI Check whether Problem happen in same output of other equipments or not By connecting same output cable of other equipment DVD Player Set Top Box different maker T...

Page 39: ...heck Repair Cable connection Connector solder Normal operating Check B 5V On Main B D Normal 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 C...

Page 40: ...10 11 Component AV RGB 11 12 Optical Audio 12 Video Probelm Power Problem 8 All Input Audio Problem 8 No Symptom L Input Block Page Remark 1 Power up Boot fail 1 2 Digital TV 2 3 Analog TV 3 4 Component 4 5 RGB D SUB 5 6 AV Scart CVBS S Video 6 7 HDMI 7 Copyright ⓒ 2009 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only ...

Page 41: ...5V Replace L1103 Y N Check IC1105 pin2 Voltage Level 3 3V Replace IC1105 N Check IC109 pin29 Output Voltage Level 3 3V Replace IC109 N Y Making Revision 2009 2 1 1 14 PDP TV Symptom Power Up Boot Fail Copyright ⓒ 2009 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only ...

Page 42: ...uner Replace IC500 or IC501 Y N Y Replace Mstar IC100 has problems N Y Check color Bad Tuner Replace Tuner None Green Check Demodulator Input Clock X501 31 875MHz Replace it X501 N Y Check PDP Module Control board Refer to Module CAS Check P400 or P403 17 CKM 18 CKP 32 CKP 33 CKM Copyright ⓒ 2009 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only ...

Page 43: ... TV Video Problem Check RF Cable Check CVBS signal TU500 16 Pin Replace Tuner IC500 Y N Replace IC503 or IC505 Y N Y Replace Mstar IC100 Check 5V voltage on IC500 IC501 Chip Tuner 3 14 Copyright ⓒ 2009 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only ...

Page 44: ...upported Check signal on C712 C713 C714 Y Check the damage of JK701 And Replace Connector N Y Replace Mstar IC100 Y Check Component Cable Measured signals depend on the input signal 4 14 Copyright ⓒ 2009 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only ...

Page 45: ...gnal R747 R748 R749 Y Y N Check JK703 Replace connector JK703 Y N Y Replace R747 R748 R749 N Replace Mstar IC100 Y Check Signal R753 R750 R751 Replace R753 R750 R751 N Check RGB Cable conductors for damage Y Measured signals depend on the input signal 5 14 Copyright ⓒ 2009 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only ...

Page 46: ... R707 S Video Replace Resistor Check AV port of JK600 JK601 Rear Check JK700 Side JK705 S Replace or reseat connector N Replace Mstar IC100 Check AV Cable S Video Cable for damage or open conductors Measured signals depend on the input signal Y Y Y Y N 6 14 Copyright ⓒ 2009 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only ...

Page 47: ...e connector Check HDMI Cable for damage or open conductors Replace Mstar IC100 Check HDCP IC102 Power 8 I2C Signal 5 6 Replace IC901 902 903 Replace IC102 Check Mstar IC100 Y Y Y Y Y N N Check EDID EEPROM IC901 902 903 Power 8 I2C Signal 5 6 N N 7 14 Copyright ⓒ 2009 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only ...

Page 48: ...V P1100 1 2 3 3V IC1103 2 Check Connector P1000 Check Mstar I2S Output R143 R134 RR135 R136 Replace IC100 Check speaker for damage Check IC1000 Status PDN 19 Reset 25 is High Check Reset R1005 PDN R1003 They must be High 3 3V Replace P1000 Replace the Speaker Y Y Y Y Y Y N N N N N N 8 14 Copyright ⓒ 2009 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use ...

Page 49: ... 903 Power 8 I2C Signal 5 6 Re download EDID data or Replace IC Digital TV Check video output Follow procedure All source audio trouble shooting Follow procedure digital TV video trouble shooting Replace Mstar IC IC100 Y N N HDMI Y N 9 14 Copyright ⓒ 2009 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only ...

Page 50: ...urce audio trouble shooting Y Follow procedure analog TV video trouble shooting N Replace Mstar IC IC100 Check R554 R557 for 5V Check R554 R557 output N Y Check SIF signal L501 Replace IC500 N Y Check SIF signal R557 Check SIF line N Y Y 10 14 Copyright ⓒ 2009 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only ...

Page 51: ...654 R652 SCART Rear AV R776 R780 AV Side Replace the Resistor Check IC100 signal C36 C37 C38 C39 C40 C41 C42 C43 C44 C45 Replace Capacitor Follow procedure All source audio trouble shooting Making Revision 2009 2 1 PDP TV Input Block Component AV RGB Audio Problem Y Y Y N N N 11 14 Copyright ⓒ 2009 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only ...

Page 52: ...sion 2009 2 1 PDP TV Input Block Optical Audio Problem N Check Signal JK1000 3 Check SPDIF signal R137 Replace Mstar IC100 Replace JK1000 Y Y 12 14 Copyright ⓒ 2009 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only ...

Page 53: ...ision 2009 2 1 PDP TV Input Block USB Problem Check USB 2 0 Cable for damage or open conductors Check L701 voltage level 5V Y N Replace L701 Check JK706 Replace JK706 Y N Replace Mstar IC100 Y Check IC400 N Replace IC400 Y 13 14 Copyright ⓒ 2009 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only ...

Page 54: ...Replace IC100 Check LVDS Cable damage or open connectors Check PDP Module Control board Refer to Module CAS Replace Cable Check Vs Va 5V 17V on Powwer Board Replace Power Board Check P1100 Disp_EN VaVs ON 5V_MNT Check GPIO Path of IC100 Y Y Y Y N N N N 14 14 Copyright ⓒ 2009 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only ...

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