LG 32LB9RT 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 : LP7BB

MODEL : 32LB9RT

32LB9RT-MD

MODEL :

32LB9RTE

32LB9RTE-MB

website:http://biz.LGservice.com

Internal Use Only

Summary of Contents for 32LB9RT

Page 1: ...SERVICE MANUAL CAUTION BEFORE SERVICING THE CHASSIS READ THE SAFETY PRECAUTIONS IN THIS MANUAL CHASSIS LP7BB MODEL 32LB9RT 32LB9RT MD MODEL 32LB9RTE 32LB9RTE MB website http biz LGservice com Internal Use Only ...

Page 2: ...ly for training and service purposes LGE Internal Use Only CONTENTS CONTENTS 2 SAFETY PRECAUTIONS 3 SPECIFICATION 6 ADJUSTMENT INSTRUCTION 10 TROUBLE SHOOTING 14 BLOCK DIAGRAM 25 EXPLODED VIEW 26 EXPLODED VIEW PARTS LIST 27 REPLACEMENT PARTS LIST 28 SVC SHEET ...

Page 3: ...rical 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 to the chassis the measured resistance should be between 1MΩ and 5 2MΩ When the exposed metal...

Page 4: ...e 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 charg...

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 repla...

Page 6: ...PECIFICATION NOTE Specifications and others are subject to change without notice for improvement 4 General TV Specification No Item Specification Remark 1 Video input applicable system NTSC M PAL M N 2 Receivable Broadcasting System 1 NTSC 2 PAL M 3 PAL N 3 RF Input Channel BAND NTSC VHF 2 13 UHF 14 69 CATV 1 125 4 Input Voltage 100 240V 50Hz 60Hz 5 Market Central South America 6 Operating Environ...

Page 7: ... strip arrangement Coating Hard coating 3H Anti glare treatment of the front polarizer Back Light 42 18CCFL 32 18CCFL 6 Set Optical Feature LCD Module No Item Min Typ Max Unit Maker Remark 1 Luminance 400 500 LPL 0RT 50cm from the surface 32 42 Full White Pattern 2 View angle R L U D 178 178 degree LPL 32 42 CR 10 3 White White X 0 03 0 279 0 279 0 279 0 03 coordinate Y 0 292 0 292 0 292 Red X 0 6...

Page 8: ...solution H freq kHz V freq kHz Pixel clock MHz Remarks 1 720 400 31 469 70 08 28 32 DOS 2 640 480 31 469 59 94 25 17 VESA VGA 3 640 480 37 500 75 00 31 50 VESA VGA 4 800 600 37 879 60 31 40 00 VESA SVGA 5 800 600 46 875 75 00 49 50 VESA SVGA 6 1024 768 48 363 60 00 65 00 VESA XGA 7 1024 768 56 476 70 06 78 75 VESA XGA 8 1024 768 60 023 75 02 79 50 VESA XGA 9 1280 768 47 776 59 87 80 125 WXGA 42XGA...

Page 9: ...DTV 480P 2 720 480 31 50 60 00 27 027 SDTV 480P 3 720 576 31 25 50 00 27 000 SDTV 576P 4 1280 720 44 96 59 94 74 176 HDTV 720P 5 1280 720 45 00 60 00 74 250 HDTV 720P 6 1280 720 37 50 50 00 74 25 HDTV 720P 50H 7 1920 1080 33 72 59 94 74 176 HDTV 1080I 8 1920 1080 33 75 60 00 74 250 HDTV 1080I 9 1920 1080 28 125 50 00 74 250 HDTV 1080I 50Hz 10 1920 1080 67 5 60 00 148 5 HDTV 1080P 11 1920 1080 56 2...

Page 10: ...tion Fig 1 1 Push the ADJ key in the Adjust Remocon 2 Input the Option Number that was specified in the BOM into the Shipping area 3 Select Tool Option1 Tool Option2 Area Option by using CH key and press the number key 0 9 consecutively ex If the value of Tool Option1 is 7 input the data using number key 7 Fig 1 4 SET assembly adjustment items Auto AV Color Balance Adjustment of White Balance Auto...

Page 11: ... etc MSPG 925FA Pattern Generator Which has Video Signal 100 Color Bar Pattern shown in Fig 2 Model 202 Pattern 65 Fig 2 7 1 1 Method of Auto RF AV S VIDEO Color Balance 1 Press the FRONT AV KEY on R C for converting input mode 2 Input the Video Signal 100 Color Bar signal into AV 3 Set the PSM to Dynamic mode in the Picture menu 4 Press INSTART key on R C for adjustment 5 Press the Vol key to ope...

Page 12: ...ture menu 3 Press the INSTART key on R C for adjustment 4 Press the Vol key to operate the set then it becomes automatically 5 Auto RGB OK means the adjustment is completed 7 3 Adjustment of RGB Required Equipments Remote controller for adjustment 802F Pattern Generator Master MSPG 925FA etc MSPG 925FA Pattern Generator Which has XGA 1024 768 60Hz PC Format output signal 100 Color Bar Pattern show...

Page 13: ...lable PC for communication through RS 232C UART Baud rate 115200 Pattern Generator MSPG 925FA etc Color Temperature Color Coordinates Setting When adjusting the Color Temperature of LCD Color AnalyzerCA 210 Matrix should be corrected through CH9 of CS 1000 should be used When adjusting the Color Temperature of PDP Color AnalyzerCA 210 Matrix should be corrected through CH10 of CS 1000 should be us...

Page 14: ...erted a pl ug in power cord Is connected the Line Filter and PSU Is normal the fuse of PSU Plasma F101 LCD F111 Plug in a power cord Connect a cable Plasma EL1 1 LC D SC100 Replace the fuse Is it connected tha t PSU and 13 pin cable in VSC board Connect the 13pin cable YE S YE S YE S YE S NO NO NO NO After re mo ve all cab les con nec ted to PSU except the C N101 author izes the AC vo ltage markin...

Page 15: ...the power board After connecting we ll each connector the normality it operates Replace the power board Is no rmal the output voltage after remove P1 connector of Y B D Replace Y B D Is no rmal the fuse FS2 FS3 on Y B D Replace the fuse Is the Z Board no rmal Is no rmal the output vo ltage after remove P1 connector of Z B D Replace Z B D Is no rmal the fuse FS1 FS2 on Z B D Replace the fuse Is t h...

Page 16: ...reen 2 It maintains the condition where the front LED is green Start check Is the link cable normal Reconnect the link cable in P600 NO Is the IC700 s output normal NO Replace the VSC Does minute discharge at Module NO Is the inverter VaV s on Check the PDP LCD Module Is output the normality Lo w High Voltage except Stand by 5V Replace the power board YE S YE S YE S NO ...

Page 17: ...in4 Is normal the Input voltage Check L308 Is normal the Input voltage Check Pin8 Pin6 Is normal video output of CXA2069Q Check R324 In case of S Video check R324 R328 Is the Tuner Cable connected well Change the Tuner Check the power Cable inserts well Is normal the I2C communication Check R309 R310 Change the IC IC300 Check the power Check L1004 Change the IC IC700 Is the LVDS Cable connected we...

Page 18: ...6 In the case of becomes unusual display from rear S Video mode main 7 In the case of becomes unusual display from side AV mode main Is normal video input of the A V jack Is normal video input of the A V jack Is normal video input of the A V jack Check the input source Same as Block A Same as Block A Same as Block A Check the input source Check the input source YES NO YES NO YES NO ...

Page 19: ...ht reserved Only for training and service purposes LGE Internal Use Only 8 In the case of becomes unusual display from side S Video mode main Is normal video input of the A V jack Check R339 R341 L310 Check the input source Same as Block A YES NO ...

Page 20: ... S Video check R312 R314 Is the Tuner Cable connected well Is normal the Input voltage Check Pin8 Pin6 Is normal the Input voltage Check L308 Is normal the I2C communication Check R309 R310 Change the IC IC300 Check the power Check L1004 Change the IC IC700 Is the LVDS Cable connected well Cable inserts well Change the Tuner Check the power L1103 Cable inserts well B NO NO NO NO NO NO NO YES YES Y...

Page 21: ...ay from component 2 mode main sub 17 In case of becomes unusual display from RGB mode main sub Is normal video input of the JK102 Check L126 L127 L128 Check the input source Is normal video input of the JK103 Check L129 L130 L131 Is normal R G B input and H V sync of the JK500 Check R509 R511 R512 R513 R515 Check the input source Check the input source Change IC IC700 Change IC IC700 Change IC IC7...

Page 22: ...cable normal IC400 operate normally Set on speaker in menu Check the Speaker cable Replace IC400 IC401 operate normally Replace IC401 IC402 operate normally Replace IC402 Replace VSC B D Only HDMI is no Sound Download the EDID data Only AV input is no Sound Is the output of IC300 pin52 53 normal Check the signal after IC300 refer to circuit diagram Replace IC300 Only RF is no Sound Check the Tuner...

Page 23: ...SD surge occurred at HDMI port 3 Check HDMI Mute re gister 0x 68 offset 0x 37 4 Check Audio ou t channe l mute reg ister 0x68 offse t 0x32 is appropriately enabled Check HDMI source Change another so urce or cab le Is wave continuous 1 Check H DMI rece iver s status register 0x60 offset 0x06 If the value is 0xf or 0x 8 it is normal 2 Check HDCP reg iste r 0 x60 offset 0x32 Enabl e bit 6 HDCP key l...

Page 24: ...ted cable P1300 P1302 Is operated IC 1300 IC1302 normally Change Timeshift Mode from off to On Connect a cable P1300 P1302 Replace the IC1300 IC1302 YE S YE S YE S NO NO NO NO Sympto m L ED is Green Doesn t work time shift m ode Can t enter to recorded list Can t record AV RF Component Ch eck f ollow Is operated IC1500 IC1501 normally Replace the IC1500 IC1501 Change HDD YE S ...

Page 26: ...G Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only 300 530 590 591 531 532 700 120 900 400 200 581 600 800 601 520 580 210 220 250 230 240 260 LV1 270 280 EXPLODED VIEW A21 A2 ...

Page 29: ...Aug 2007 Printed in Korea P NO MFL39106202 ...

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