LG 32LH7000 Service Manual Download Page 1

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LCD TV

SERVICE MANUAL

CAUTION

BEFORE SERVICING THE CHASSIS,
READ THE SAFETY PRECAUTIONS IN THIS MANUAL.

CHASSIS : LD91D

MODEL : 32LH7000

32LH7000-ZA

North/Latin America

http://aic.lgservice.com

Europe/Africa

http://eic.lgservice.com

Asia/Oceania

http://biz.lgservice.com

Internal Use Only

Summary of Contents for 32LH7000

Page 1: ...SERVICING THE CHASSIS READ THE SAFETY PRECAUTIONS IN THIS MANUAL CHASSIS LD91D MODEL 32LH7000 32LH7000 ZA North Latin America http aic lgservice com Europe Africa http eic lgservice com Asia Oceania http biz lgservice com Internal Use Only ...

Page 2: ...ght 2009 LG Electronics Inc All right reserved Only for training and service purposes 2 CONTENTS CONTENTS 2 PRODUCT SAFETY 3 SPECIFICATION 6 ADJUSTMENT INSTRUCTION 10 TROUBLE SHOOTING 15 BLOCK DIAGRAM 19 EXPLODED VIEW 20 SVC SHEET ...

Page 3: ...d 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 metallic part has a return path...

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: ...ed each drawing and specification by part number in accordance with BOM 5 The receiver must be operated for about 5 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 No Item Specification Remark 1 Display Screen Device 32 wide Color Display Module LCD 2 Aspect Ratio 16 9 3 LCD Module 32 TFT ...

Page 7: ...283 0 285 DQA 0 015 2 Medium White Balance X axis 0 283 0 285 0 287 DQA 0 015 White Balance Y axis 0 291 0 293 0 295 DQA 0 015 3 Warm White Balance X axis 0 311 0 313 0 315 DQA 0 015 White Balance Y axis 0 327 0 329 0 331 DQA 0 015 No Item Min typ Max Inch Power Board P N Remark 1 Dynamic CR 10000 15000 32 EAY58473201 HDMI 720p Full Black Pattern Only HDMI mode No Item Module Luminance min C R min...

Page 8: ...x1080 33 75 60 00 HDTV 1080i 12 1920x1080 33 72 59 94 HDTV 1080i 13 1920x1080 26 97 27 23 97 24 HDTV 1080p 14 1920x1080 33 716 33 75 29 976 30 00 HDTV 1080p 15 1920x1080 56 250 50 HDTV 1080p 16 1920x1080 67 43 67 5 59 94 60 HDTV 1080p 7 RGB PC INPUT No Resolution H freq kHz V freq Hz Pixel clock MHz Proposed Remark 1 720x400 31 468 70 08 28 321 2 640x480 31 469 59 94 25 17 VESA 37 684 75 00 31 50 ...

Page 9: ...0I 9 1920x1080 26 97 27 23 97 24 74 17 74 25 HDTV 1080P 10 1920x1080 33 716 33 75 29 976 30 00 74 25 HDTV 1080P 11 1920x1080 56 250 50 148 5 HDTV 1080P 12 1920x1080 67 43 67 5 59 94 60 148 35 148 50 HDTV 1080P 2 PC Mode No Resolution H freq kHz V freq Hz Pixel clock MHz Proposed Remark 1 720x400 31 468 70 08 28 321 HDCP 2 640x480 31 469 59 94 25 17 VESA HDCP 37 684 75 00 31 50 3 800x600 37 879 60 ...

Page 10: ...lick 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 After downloading check OK message USB DOWNLOAD 1 Put the USB Stick to the USB socket 2...

Page 11: ...ce Mode by pushing ADJ key Enter the 5 item and then Push the Start button 2 Internal ADC Only adjust in the RGB mode After enter Service Mode by pushing ADJ key Enter ADC Calibration mode by pushing G key at 5 ADC Calibration Push the Start button 3 Function Check Check display and sound Check Input and Signal items cf work instructions 1 TV 2 AV SCART1 SCART2 CVBS 3 COMPONENT 480i 4 RGB PC 1024 ...

Page 12: ...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 4 2 DPM operation confirmation Only Apply for MNT Model Check if Power LED Color and Power Consumption operate as standard Set Input to RGB and connect D sub cable to set Measurement Conditi...

Page 13: ... 31 40 45 40 61 40 81 D1 80 C0 90 01 40 01 0x03 D1 01 C0 01 01 01 01 01 1A 1B 36 21 80 50 A0 A0 70 51 38 00 1F 1E 40 30 30 48 20 88 0x04 35 00 E8 BC 26 86 32 21 00 00 1A 1C DA 26 2F 36 78 80 E0 A0 51 70 1A 38 25 1F 40 40 0x05 58 50 98 20 14 85 00 00 E8 BC 26 86 32 21 00 00 1A 18 00 00 00 00 00 00 FD FC 00 00 39 33 0x06 4B 32 1F 4C 54 47 12 35 00 35 0A 30 20 30 20 0A 20 20 20 20 0x07 00 e d b a d c...

Page 14: ...ss low 00 FF Data Write data CS CMD LENGTH ADH ADL Data_1 Data_n Delay 20ms 5 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 5 3 method notice 1 Serial number D L is using of scan equipment 2 Setting of scan equipment operated by Manufacturing Technology Group 3 Seria...

Page 15: ...g problem because Main IC IC100 have some troubles After checking thoro ugh ly all pa th onc e again You should decid e to replace Main Board or not Check IC104 Can you see the normal signal Check the output of TRQ105 in the Jack Board Can you see the normal waveform Check the output of Main IC IC100 Especially you should check The H V sync and clock Can you see the normal waveform YES YES NO Coul...

Page 16: ...rmal waveform Check th e input of Compo nent Audio switch IC405 in the Jack Bo ard Can you see the normal waveform Check th e output of Component Audio switch IC405 in the Jack Bo ard Can you see the normal waveform YES YES YES NO JK304 may have problem Rep lace th is Jack NO After checking the Power of compone nt Audio switch y ou should decide to replace component Audio s witch or not NO After c...

Page 17: ...al waveform YES YES NO After ch eckin g the Power of RGB Audio switc h you should decide to replace RGB Audio s witch or not NO After ch eckin g the Power of RGB Audio switc h you should decide to replace RGB Audio s witch or not Check th e output of Main IC IC100 Especially you should check The H V sync and c lock Can you see the normal waveform YES NO After ch eckin g the Power of Main IC IC100 ...

Page 18: ... power of HDMI Switch you should decide to replace HDMI Switch or not NO NO After ch eckin g the Power of th is ch ip you should decide to replace this or not After ch eckin g the Power of HDMI Switch y ou should decide to replace HDMI S witch or not YES Check HDCP commu nicatio n lin es IC601 NO After ch eckin g the Power of th is ch ip you should decide to replace this or not Check th e output o...

Page 19: ...Address 0 7 DDR2 Data 0 15 DDR2 SDRAM 128MB IC301 DDR2 Data 0 15 DDR2 Address 0 12 IC100 LGE3369A FE_TS_DATA 0 7 HDMI1 HDMI2 HDMI3 HDMI4 TDA9996 IC600 TMDS 0 7 H SCART SCART RGB F SCART L R H SCART L R AV L R COMP L R TUNER V_OUT DTV MNT_V_OUT DDR2 Address 0 12 Head Phone FRC LGE7329A IC900 DDR2 128MB 2 IC1000 1001 JACK BOARD RS 232C MAX3232CDR IC300 SPDIF SPDIF_OUT L R PC L R L R L R CI_TS_DATA 0...

Page 20: ...IEW Many electrical and mechanical parts in this chassis have special safety related characteristics These parts are identified by in the Schematic Diagram and EXPLODED VIEW It is essential that these special safety parts should be replaced with the same components as recommended in this manual to prevent X RADIATION Shock Fire or other Hazards Do not modify the original design without permission ...

Page 21: ... C109 0 R148 24V PWM2 3 3V 100 R153 PWM_DIM PWM2 OPT R154 0 R149 R158 OPT 3 3V_ST 2SC3052 Q105 E B C POWER_ON_DELAY 2SC3052 Q107 E B C 3 3V_ST 10K R116 S 6 _ R e s e t 4 7K R114 10K R118 100 R117 4 7 u F 10V C107 10uF 6 3V C108 0 R119 R110 OPT R1541 OPT 1 10W 30K 1 R1566 1 10W 5 1K 5 R1567 5V_ST POWER_DET 4 7K R1606 10K R1554 OPT R1532 R1565 OPT 1K R1553 1K R1549 12K 1 R1550 SC1_MUTE MAX810RTR IC1...

Page 22: ...000 0 1 u F C285 0 1 u F C267 0 1 u F C273 10uF 10V C225 22pF OPT C239 22pF OPT C236 22pF OPT C238 22pF OPT C237 10K R243 10K R244 3 3V 10K R274 EU_SCART 10K R275 EU_SCART 10uF 10V C2025 DSUB_B DSUB_R DSUB_G 0 1 u F C2026 0 1 u F C283 0 1 u F C242 10uF C2027 100 R276 OPT 0 1 u F C2040 0 1 u F C2035 0 1 u F C2033 1 26V_VDDC 0 1 u F C2032 0 1 u F C2036 0 1 u F C2038 0 1 u F C2034 0 1 u F C2039 0 1 u...

Page 23: ...P8 A8 L1 NC4 L2 BA0 R8 NC3 K7 RAS F8 VSSQ3 F3 LDM P3 A9 M3 A1 N3 A5 K8 CK R3 NC5 L3 BA1 J 7 VSSDL L7 CAS F2 VSSQ4 B3 UDM M2 A10 AP K2 CKE R7 NC6 M7 A2 N7 A6 M8 A0 J 1 VDDL K3 WE E8 LDQS P7 A11 K9 ODT A2 NC1 N2 A3 P2 A7 H8 VSSQ1 F7 LDQS A8 UDQS R2 A12 L8 CS E2 NC2 E7 VSSQ5 D8 VSSQ6 D2 VSSQ7 A7 VSSQ8 B8 VSSQ9 B2 VSSQ10 P9 VSS1 N1 VSS2 J 3 VSS3 E3 VSS4 A3 VSS5 G9 VDDQ1 G7 VDDQ2 G3 VDDQ3 G1 VDDQ4 E9 V...

Page 24: ...BLM15BD121SN1 L405 FE_SIF S_Y_IN COMP_Y AV_CVBS_IN FE_DEMOD_SCL FE_TS_DATA 6 SC1_FB 0 1 u F C425 FE_TS_DATA 0 DSUB_B AV_L_OUT COMP_Pr MLB 201209 0120P N2 L402 SC1_G FE_RESET FE_VMAIN FE_TUNER_SDA TV_R_OUT FE_TS_DATA 7 12V SC2_ID HP_DET DBG_TX DSUB_R 0 1 u F C424 FE_TS_DATA 1 DTV MNT_V_OUT FE_TS_VAL_ERR S_C_IN SC1_CVBS_IN 47 R440 DBG_RX DDC_SDA UART_TX COMP_Pb FE_TS_DATA 2 FE_TUNER_SCL DTV MNT_R_OU...

Page 25: ...2 33 AR513 CI_MCLKI 74LVC541A PW BUFFER IC502 3 A1 2 A0 4 A2 1 OE1 6 A4 5 A3 7 A5 8 A6 9 A7 10 GND 11 Y7 12 Y6 13 Y5 14 Y4 15 Y3 16 Y2 17 Y1 18 Y0 19 OE2 20 VCC 3 3V_CI FE_TS_CLK FE_TS_VAL_ERR FE_TS_SYN BUF_TS_CLK BUF_TS_VAL_ERR BUF_TS_SYN BUF_TS_DATA 0 FE_TS_SERIAL_D 0 1 u F 16V C510 0 1 u F C508 0 1 u F C503 0 1uF C512 0 1 u F 16V C507 0 1 u F 16V C500 0 1 u F 16V C504 47 R521 47 R519 10K R518 1...

Page 26: ... 16V C628 0 1 u F 16V C629 0 1 u F 16V C631 0 1 u F 16V C630 0 1 u F 16V C632 0 1 u F 16V C633 OPT R666 0 R669 CAT24WC08W T IC601 3 A2 2 A1 4 VSS 1 A0 5 SDA 6 SCL 7 WP 8 VCC 0 1 u F C603 3 3V EEPROM_SDA EEPROM_SCL 3 3V_HDMI 0 1 u F C634 3 3V BLM18PG121SN1D L601 BLM18PG121SN1D L602 12K 1 R671 4 7K R640 4 7K R643 3 3V_HDMI 2K R675 2K R676 22 R641 22 R642 22 R680 22 R679 OPT R661 0 R663 0 OPT R627 CE...

Page 27: ...47K R746 10K R741 0 R740 100 R704 100 R709 100 R710 0 R749 BLM18PG121SN1D L700 BLM18PG121SN1D L701 0 R742 0 R750 0 1 u F 16V C773 1000pF OPT C723 1000pF OPT C722 0 4 7 u F 50V C745 0 4 7 u F 50V C746 CIC21J501NE L703 1K R715 1K R714 100pF 50V C705 390pF 50V C743 390pF 50V C744 390pF 50V C742 390pF 50V C741 0 0 1 u F 50V C756 0 0 1 u F 50V C758 0 0 1 u F 50V C755 0 0 1 u F 50V C757 3 3 R736 3 3 R73...

Page 28: ...IC21J501NE L811 BLM15BD121SN1 L801 2SC3052 Q800 E B C 10uF 6 3V C806 10uF 6 3V C822 10uF 6 3V C876 10uF 6 3V C879 10uF 6 3V C896 10uF 6 3V C898 C884 OPT 10K R804 1uF 10V C834 1uF 10V C840 1uF 25V C853 1uF 10V C881 10uF 6 3V C887 OPT MP2212DN IC804 3 IN 2 GND 4 BS 1 FB 5 VCC 6 SW_1 7 SW_2 8 EN SYNC 22uF C829 1 10W 10 1 R858 10nF 50V C830 NR8040T3R6N 3 6uH L808 1 10W 10K R809 22uF C831 47 R810 1uF 1...

Page 29: ... T1 MDATA 18 T2 MDATA 21 R2 MCLK 0 P2 MCLKZ 0 G7 GND_1 L9 AVDD_MEMPLL N5 MVREF N4 ODT T3 RASZ R3 CASZ P3 MADR 0 T4 MADR 2 R4 MADR 4 J 1 0 GND_12 P4 MADR 6 T5 MADR 8 R5 MADR 11 P5 WEZ T6 BADR 1 R6 BADR 0 P6 MADR 1 T7 MADR 10 L11 AVDD_DDR_7 R7 MADR 5 P7 MADR 9 T8 MADR 12 R8 MADR 7 P8 MADR 3 N8 MCLKE K10 GND_16 F7 VDDC_3 T9 MDATA 4 R9 MDATA 3 K7 GND_13 P9 MDATA 1 T10 MDATA 6 K11 AVDD_DDR_3 R10 MDATA ...

Page 30: ...D8 VSSQ_6 D2 VSSQ_7 A7 VSSQ_8 B8 VSSQ_9 B2 VSSQ_10 P9 VSS_1 N1 VSS_2 J 3 VSS_3 E3 VSS_4 A3 VSS_5 G9 VDDQ_1 G7 VDDQ_2 G3 VDDQ_3 G1 VDDQ_4 E9 VDDQ_5 C9 VDDQ_6 C7 VDDQ_7 C3 VDDQ_8 C1 VDDQ_9 A9 VDDQ_10 R1 VDD_1 M9 VDD_2 J 9 VDD_3 E1 VDD_4 A1 VDD_5 B9 DQ15 B1 DQ14 D9 DQ13 D1 DQ12 D3 DQ11 D7 DQ10 C2 DQ9 C8 DQ8 F9 DQ7 F1 DQ6 H9 DQ5 H1 DQ4 H3 DQ3 H7 DQ2 G2 DQ1 G8 DQ0 HYB18TC256160BF 2 5 IC1001 J 2 VREF J ...

Page 31: ...1 4 IN2 5 GND_2 6 EXTCHOKE 7 GND_3 8 VDDA_2 9 VDDA_3 10 VDDC_1 11 GND_4 12 VDDC_2 13 VDDC_3 14 VDDA_4 15 VAGC 16 VIF 17 VDDA_5 18 SIF 19 GND_5 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 4...

Page 32: ...2_DET 100uF 16V C210 FE_VOUT 5V_GENERAL 5V_GENERAL 10K R233 12K R234 10K R235 12K R236 10K R237 12K R238 10K R239 12K R240 5 6V OPT D219 5 6V OPT D202 5 6V OPT D208 5 6V OPT D207 5 6V OPT D205 5 6V OPT D200 5 6V OPT D213 5 6V OPT D214 5 6V OPT D217 5 6V OPT D216 5 6V OPT D221 470K R241 470K R242 470K R243 470K R244 KDS184 D222 A2 C A1 30V OPT D201 30V OPT D206 30V OPT D203 30V OPT D204 30V OPT D22...

Page 33: ...7 1K R314 AV_CVBS_DET 1K R315 S_C_IN 5V_GENERAL 470K R312 S_DET 47pF 50V C305 5V_GENERAL 47pF 50V C306 0 R310 S_Y_IN 100pF 50V C303 AV_CVBS_IN 10K R305 75 R317 0 R306 0 R304 75 R320 100pF 50V C304 470K R316 0 1 u F 16V C302 AV_R_IN AV_L_IN 75 R321 PMJ029 01 JK300 4A YL CONTACT 2A YL 1P_CAN 3A YL 0_SPRING 2B WH 1P_CAN 5B WH C_LUG_L 2C RD 1P_CAN 4C RD CONTACT 3C RD 0_SPRING 6 S VHS GROUND_TER 7A S V...

Page 34: ... L401 0 0 1 u F 50V C405 0 4 7 u F 25V C404 56K 1 R405 0 1 u F 50V C413 100K R406 FE_DEMOD_SDA FE_DEMOD_SCL 100uF 16V C412 0 1 u F 16V C424 FE_DEMOD_SCL FE_DEMOD_SDA AP1117E33G 13 IC402 2 OUT 3 IN 1 ADJ GND AP1117E18G 13 IC404 2 OUT 3 IN 1 ADJ GND 22 R446 SC1_VIDEO_MUTE 0 R447 0 R448 5V_GENERAL 10K R449 CB3216PA501E L406 CB3216PA501E L407 22uF 16V C401 22uF 50V C452 OPT FE_DEMOD_SDA 3 3V_ST FE_TS_...

Page 35: ...Feb 2009 Printed in Korea P NO MFL58858405 ...

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