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LG 37LG5500-ZB, Service Manual

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LG 37LG5500-ZB Service Manual Download Page 18

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

LGE Internal Use Only

C

2008

- 18 -

Does minute

discharge At Module?

Is the LVDS cable

normal?

Is the VAVS on?

Check the LCD Module

Yes

No

YES

Yes

Reconnect the

LVDS cable in P801.

No

Is the IC700 (FLI8548)

Output normal?

Replace the VSC

No

NO

Replace the 

Power board.

Is output the normality

Low/High voltage except

stand-by 5V?

NO

4. No Raster

(1) Symptom

1) No OSD and image occur at screen.. 
2) It maintains the condition where the front LED is green.

(2) Check follow

Summary of Contents for 37LG5500-ZB

Page 1: ...LCD TV SERVICE MANUAL CAUTION BEFORE SERVICING THE CHASSIS READ THE SAFETY PRECAUTIONS IN THIS MANUAL CHASSIS LD82D MODEL 37LG5500 37LG5500 ZB website http biz LGservice com Internal Use Only ...

Page 2: ...All right reserved Only for training and service purposes LGE Internal Use Only C 2008 2 CONTENTS CONTENTS 2 PRODUCT SAFETY 3 SPECIFICATION 6 ADJUSTMENT INSTRUCTION 10 TROUBLE SHOOTING 15 BLOCK DIAGRAM 22 EXPLODED VIEW 24 SVC SHEET ...

Page 3: ...afe 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 ter...

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: ...re Size 37 inch 37LG5500 7 Tuning System FVS 100 program PAL 200 PR Option 8 Operating Environment 1 Temp 0 40 deg 2 Humidity 10 90 9 Storage Environment 3 Temp 20 50 deg 4 Humidity 10 90 10 Display LCD Module LPL 2 Model Specification Item Specification Remark Market France Broadcasting system PAL BG I DK SECAM L L DVB T Receiving system Analog Upper Heterodyne Digital COFDM Scart Jack 2EA PAL SE...

Page 7: ...ity 10 90 8 Storage Environment Temperature 20 50 deg Altitude 0 to 4000feet Humidity 10 90 9 Back Light 20EEFL 4 Optical Feature LCD Module LC370WU1 SL01 No Item Specification Min Typ Max Remark 1 Viewing Angle CR 10 R L U D 178 178 2 Luminance Luminance cd m2 400 500 100IRE Full White pattern 255gray Variation 1 3 MAX MIN 3 Contrast Ratio CRD 37 400 5000 Full white 100IRE Full black 0IRE Picture...

Page 8: ...pported 9 1280x1024 63 595 60 00 108 875 SXGA 10 1400x1050 65 150 60 00 122 50 SXGA 11 1920x1080 66 647 59 988 138 625 WUXGA 7 Component Video Input Y PB PR No Specification Proposed Resolution H freq kHz V freq Hz 1 720x480 15 73 59 94 SDTV DVD 480i 2 720x480 15 75 60 SDTV DVD 480i 3 720x480 31 47 59 94 SDTV 480p 4 720X480 31 5 60 SDTV 480p 5 720x576 15 625 50 SDTV DVD 576i 6 720x576 31 25 50 SDT...

Page 9: ... 59 988 138 625 WUXGA 10 HDMI PC Table 9 HDMI DTV Table No Resolution H freq kHz V freq Hz Pixel clock MHz Remark Proposed 1 640x480 31 469 59 94 25 175 SDTV 480p 60Hz PC mode 2 640x480 31 469 60 25 2 SDTV 480p 60Hz Display 640 480 3 720x480 31 47 59 94 27 SDTV 480p 60Hz 4 720x480 31 5 60 27 027 SDTV 480p 60Hz 5 720x576 31 25 50 27 SDTV 576p 50Hz 6 1280x720 37 5 50 74 176 HDTV 720p 50Hz HDCP 7 128...

Page 10: ...annel Recover by using D E CH key and press G VOL 3 When Channel Recover is completed set will be turned off and LED light go to stand by mode Before AV ADC Calibration should be executed the Tool option 1 4 Select method of Tool option 1 1 Press ADJ Key in the Adjust remote control 2 Select Tool option 1 by using D E CH key and press A ENTER 3 Select Maker by using D E CH key and change the modul...

Page 11: ...UT MODEL NAME HEX HDMI1 67030C001000B82D HDMI2 67030C002000B82D HDMI3 67030C003000B82D 0x000x010x02 0x03 0x04 0x05 0x06 0x07 0x08 0x09 0x0A 0x0B0x0C0x0D 0x0E 0x0F 0x00 00 FF FF FF FF FF FF 00 1E 6D ⓐ ⓑ 0x01 ⓒ 01 03 80 46 27 78 EA D9 B0 A3 57 49 9C 25 0x02 11 49 4B A5 6E 00 31 40 45 40 61 40 81 80 90 40 0x03 A9 40 D1 C0 01 01 1A 36 80 A0 70 38 1F 40 30 20 0x04 35 00 E8 26 32 00 00 1A 1B 21 50 A0 51...

Page 12: ...l 215 pattern 65 signal into Component 2 Set the PSM to Dynamic mode in the Picture menu 3 Press the IN START key on R C for adjustment 4 Press the G Vol key to operate the set then it becomes automatically 5 On bottom side of OSD Component OK means the adjustment is completed 7 3 Adjustment of RGB 1 Required Equipments Remote controller for adjustment MSPG 925F Pattern Generator Which has XGA 102...

Page 13: ...start keep the power on no suspension of power supply and heat run over 15 minutes Using no signal or full white pattern or the others check the back light on 8 1 Auto white Balance set RS 233 Host PC Baud Rate 115200bps Download Cortez Inside pattern is used when white balance is controlled Connect as below figure and click the start button on W B execution program W B is automatically processing...

Page 14: ...ther two is controlled lowering from 80 Color Temperature Cool Medium Warm 1 When R GAIN is set to 80 Control G GAIN and B GAIN by lowering from 80 2 When B GAIN is set to 80 Control R GAIN and G GAIN by lowering from 80 3 When G GAIN is set to 80 Control R GAIN and B GAIN by lowering from 80 One of R Gain G Gain B Gain should be kept on 80 and adjust other two lower than 80 When R G B GAIN are al...

Page 15: ...the 5V Monitor signal come out No 7 Check the VSC Vs ON signal Doesn t the high tension output come out Doesn t the VSC signal Vs ON come out Yes No High tension output Voltage drop it occurs When remove the Y B D Module input connector output voltage drop is occurs When remove the Y Z B D Module Input connector Power Board high tension output voltage drop it occurs Yes No No 9 Check the Power Boa...

Page 16: ...ow Is plug in power cord Plug in power cord Yes No Is connect the Line Filter and Power Board Cable Connect Cable Yes No Is normal the Fuse F101 on Power Board Replace Fuse Yes No Is connect the Power Board and 13P of VSC Board Cable Connect Cable Yes No After remove the cable connect to Power Board except the SC101 connection cable authorizes the AC voltage marking on manual When ST BY 5V does no...

Page 17: ...o Yes Is normal the Y Board Is normal the output voltage after remove P103 connector of Y B D Is normal the Fuse FS101 FS102 on Y B D In case of open is replace Yes No Yes Yes Replace Z Board Is normal the Z Board Is normal the output voltage after remove P1 connector of Z B D Is normal the Fuse FS1 FS2 on Z B D In case of open is replace Yes No Yes Is normal the X Board Is normal the output volta...

Page 18: ...e normal Is the VAVS on Check the LCD Module Yes No YES Yes Reconnect the LVDS cable in P801 No Is the IC700 FLI8548 Output normal Replace the VSC No NO Replace the Power board Is output the normality Low High voltage except stand by 5V NO 4 No Raster 1 Symptom 1 No OSD and image occur at screen 2 It maintains the condition where the front LED is green 2 Check follow ...

Page 19: ...t display the OSD 1 Symptom 1 LED is green 2 The minute discharge continuously becomes accomplished from module 2 Check follow Is normal the LVDS cable Is normal the VSC Board Is the LVDS cable connected well Cable inserts well Yes No No Yes Operates the FIL8548 IC IC700 Replace FIL8548 IC IC700 No Is normal the CtrlBoard of Module Replace Ctrl B D No No Yes Replace VSC B D Replace cable Yes ...

Page 20: ...opyright LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only C 2008 20 Is normal the Tuner Is normal the CXA2069Q Is the Tuner Cable connected well Cable inserts well Yes No No Yes Is normal the FIL8548 Replace Tuner No Is normal the Input voltage IIC Communication and CVBS output Yes Is normal the Input voltage IIC Communication and HV sync No Replac...

Page 21: ...cuit diagram No Only specific input except HDMI DTV RF is no sound Check the signal before CXA2069 refer to circuit diagram No YES YES Only RF is no sound Check the Tuner IN OUT No YES YES Only AV component PC input is no sound Is the output of CXA2069 normal No YES IC1300 operates Normal Replace IC1300 MSP4450 No IC1301 operates Normal Replace IC1301 NTP300A No YES Replace VSC BD YES No Replace C...

Page 22: ...3 3 V V L R Y C V L R Y C Co mp o nent Y Pb Pr L R Co mp o nent Co mp o nent Y Pb Pr L R RF IN RF IN 1 8V 1 8V 3 3V 3 3V 5V 5V D A Unity Tuner TDFV G135D S PDIF S PDIF FE_TS_Data TS_DATA CI_TS_Data R G B 2 4 b i t S D H D CVBS DTV L R OUT TMDS CEC 1 2 COMP Y Pb Pr PC R G B HV_SYNC SCART R G B FB I2S SIDE A V SIF AM_AUDIO COMP PC R LIN AV R L OUT TV R L OUT TV R L OUT SCART V R LIN DTV MNT V R L OU...

Page 23: ... 23 Copyright LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only C 2008 BLOCK DIAGRAM Vitiza3 ...

Page 24: ...Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only C 2008 24 300 510 500 121 120 122 200 800 900 901 801 802 803 804 805 806 550 530 810 521 520 540 820 400 EXPLODED VIEW ...

Page 25: ...Copyright LG Electronics Inc All right reserved Only for training and service purposes C 2008 LGE Internal Use Only VITIAZ 2 ...

Page 26: ...Copyright LG Electronics Inc All right reserved Only for training and service purposes C 2008 LGE Internal Use Only ...

Page 27: ...Copyright LG Electronics Inc All right reserved Only for training and service purposes C 2008 LGE Internal Use Only ...

Page 28: ...Copyright LG Electronics Inc All right reserved Only for training and service purposes C 2008 LGE Internal Use Only ...

Page 29: ...Copyright LG Electronics Inc All right reserved Only for training and service purposes C 2008 LGE Internal Use Only VITIAZ 3 ...

Page 30: ...Copyright LG Electronics Inc All right reserved Only for training and service purposes C 2008 LGE Internal Use Only ...

Page 31: ...Copyright LG Electronics Inc All right reserved Only for training and service purposes C 2008 LGE Internal Use Only ...

Page 32: ...Copyright LG Electronics Inc All right reserved Only for training and service purposes C 2008 LGE Internal Use Only ...

Page 33: ...Apr 2008 Printed in Korea P NO MFL40944503 ...

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