LG 52LG50FD Service Manual Download Page 2

Page: 2 / 62

LGE Internal Use Only

2008

- 2 -

CONTENTS

CONTENTS .............................................................................................. 2

PRODUCT SAFETY ..................................................................................3

SPECIFICATION ........................................................................................6

ADJUSTMENT INSTRUCTION................................................................11

TROUBLE SHOOTING ............................................................................21

BLOCK DIAGRAM...................................................................................49

EXPLODED VIEW .................................................................................. 50

SVC. SHEET ...............................................................................................

Summary of Contents for 52LG50FD

Page 1: ...LCD TV SERVICE MANUAL CAUTION BEFORE SERVICING THE CHASSIS READ THE SAFETY PRECAUTIONS IN THIS MANUAL CHASSIS LJ82B MODEL 52LG50FD 52LG50FD SA 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 11 TROUBLE SHOOTING 21 BLOCK DIAGRAM 49 EXPLODED VIEW 50 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: ...ge 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 char...

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: ...lowed each drawing and specification by part number in accordance with BOM 2 5 The receiver must be operated for about 20 minutes prior to the adjustment 3 Test method 3 1 Performance LGE TV test method followed 3 2 Demanded other specification Safety CE IEC specification EMC CE IEC LC470WU5 SLA1 47LB7DF SB LC470WUN SAB1 47LB7DF SB V3 9 Operating Environment 1 Temp 0 40 deg 2 Humidity 80 10 Storag...

Page 7: ...iformity N A 700 1 900 1 NORMAL Contrast ratio 7000 1 9000 1 DCR Cool 11000 27 Color Temperature Standard Typ 1000 9300 6500 Typ 1000 Test Condition HDMI Input Warm 28 Color Distortion DG 10 0 29 Color Distortion DP 10 0 deg 30 Color S N AM FM 43 0 dB 31 Color Killer Sensitivity 80 dBm No Item Min Typ Max Unit Remark 16 White peak brightness Center 1 point Full White Pattern 400 500 cd m LC470WUN ...

Page 8: ...ty N A 800 1 1100 1 NORMAL Contrast ratio 8000 1 12000 1 DCR Dimming25 Cool 11000 27 Color Temperature Standard Typ 1000 9300 6500 Typ 1000 Test Condition HDMI Input 5 3 47LG50D SA Warm 28 Color Distortion DG 10 0 29 Color Distortion DP 10 0 deg 30 Color S N AM FM 43 0 dB 31 Color Killer Sensitivity 80 dBm No Item Min Typ Max Unit Remark 16 White peak brightness Center 1 point Full White Pattern 3...

Page 9: ... 71 29 97 74 176 HDTV 1080P 15 1920 1080 56 25 50 000 148 5 HDTV 1080P 16 1920 1080 28 125 25 000 74 25 HDTV 1080P 7 RGB PC No Resolution H freq kHz V freq Hz Pixel clock MHz Remark PC DDC 1 640 350 31 468 70 09 25 17 EGA X 2 720 400 31 469 70 08 28 32 DOS O 3 640 480 31 469 59 94 25 17 VESA VGA O 4 640 480 37 861 72 80 31 50 VESA VGA O 5 640 480 37 500 75 00 31 50 VESA VGA O 6 800 600 35 156 56 2...

Page 10: ...75 02 78 75 VESA XGA O 13 1280 768 47 776 59 870 79 5 CVT WXGA O 14 1360 768 47 712 60 015 85 50 VESA WXGA O 15 1280 1024 63 981 60 020 108 00 VESA SXGA O 16 1280 1024 79 976 75 025 135 VESA SXGA O 17 1600 1200 75 00 60 00 162 VESA UXGA O 18 1920 1080 67 5 60 148 5 HDTV 1080P O DTV 1 720 480 31 47 60 27 027 SDTV 480P 2 720 480 31 47 59 94 27 00 SDTV 480P 3 1280 720 45 00 60 00 74 25 HDTV 720P 4 12...

Page 11: ...n 2 4 The input voltage of the receiver must keep 100 220V 50 60Hz 2 5 Before adjustment execute Heat Run for 5 minutes O After Receive 100 Full white pattern 06CH then process Heat run or 8 Test pattern condition of Ez Adjust status O How to make set white pattern A Press Power ON button of Service Remocon B Press ADJ button of Service remocon Select 10 Test pattern and after select White using n...

Page 16: ...p1 Adjust 1080p Comp1 RGB Factory adjustment ADC 480i Component1 adjustment Check connection of Component1 MSPG 925FA Ë Model 209 Pattern 65 Set Component 480i mode and 100 Horizontal Color Bar Pattern HozTV31Bar then set TV set to Component1 mode and its screen to NORMAL After get the signal wait more a second and enter the Ez Adjust with press ADJ key of Service remocon After then select 3 ADC 4...

Page 17: ...Data 17 Copyright LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only C 2008 LCD TV SET or Digital Board USB Pic 3 For write EDID data setting Jig and another instruments 0 1 2 3 4 5 6 7 8 9 A B C D E F 0 00 FF FF FF FF FF FF 00 1E 6D 01 00 01 01 01 01 10 00 11 01 03 80 73 41 96 0A CF 74 A3 57 4C B0 23 20 09 48 4C AF CF 00 31 40 45 40 61 40 81 80 A9 4...

Page 18: ...54 56 0A 20 20 20 20 20 20 20 01 8A 0 1 2 3 4 5 6 7 8 9 A B C D E F 0 02 03 18 F1 47 84 05 03 02 20 22 10 23 15 07 50 10 67 03 0C 00 30 00 B8 2D 01 1D 00 72 51 D0 1E 20 20 6E 28 55 00 C4 8E 21 00 00 1E 01 1D 80 18 71 1C 30 16 20 58 2C 25 00 C4 8E 21 00 00 9E 8C 0A D0 8A 40 20 E0 2D 10 10 3E 96 00 C4 8E 21 00 00 18 8C 0A 50 D0 8A 20 E0 2D 10 10 3E 96 00 13 8E 21 00 00 18 60 26 36 80 A0 70 38 1F 40 ...

Page 19: ...ed Green Blue compensation with CS 2100 See the Coordination bellowed one Manual adjustment sequence is like bellowed one Turn to Ez Adjust mode with press ADJ button of service remocon Select 10 Test Pattern with CH button and press enter Then set will go on Heat run mode Over 30 minutes set let on Heat run mode Let CA 210 to zero calibration and must has gap more 10cm from center of LCD module w...

Page 20: ...en notice with buzzer If its result is OK then process next steps Notice it with Good lamp and STOPER Down 5 3 Check Items Test Voltage GND 1 5KV min at 100mA Signal 3KV min at 100mA Test time just 1 second Test point GND test Test between Power cord GND and Signal cable metal GND ESD test Test between Power cord GND and Live and neutral Leakage current Set to 0 5mA rms 6 Default Service option 6 ...

Page 21: ...EG4 Decoder Analog Digital Tuner TC90512 DVI I2S SIF SPDIF Out CVBS CVBS Y C Y Cb Cr R G B DDR1 64MB CS5340 L R Serial TP 20bits 12bit YC 4 2 2 NIM TUNER TMDS_RX EPM240F MNT out Audio Only TMDS341A 3x1 S W CVBS Y C MC33078 AMP L R RS232 RX TX DVI 4 2 2 20bit YC Full HD 1080P WXGA 768P RF Switc h DM1 DP 1 Serial TP 74HC04 SPDIF Out Coaxial Video Front End Dual HDMI Rx HD SD Video Encoder Audio DSP ...

Page 22: ...Y N Y Check IC804 2 Pin L805 Voltage Level 3 3V Replace IC804 L805 Recheck Y N Check IC803 5 Pin L807 Voltage Level 2 6V Replace IC803 or L807 Recheck Y N Check C830 C853 C856 Voltage Level 1 2V Replace IC802 or IC805 Recheck Y N Check X200 Clock 54MHz Replace X200 Y N Check R154 Clock 33MHz Maybe BCM3553 has troubles Y N Replace IC101 Flash Memory N N N Check Micom IC407 Redownload or replace Pow...

Page 23: ...4 Decoder Analog Digital Tuner TC90512 DVI I2S SIF SPDIF Out CVBS CVBS Y C Y Cb Cr R G B DDR1 64MB CS5340 L R Serial TP 20bits 12bit YC 4 2 2 NIM TUNER TMDS_RX EPM240F MNT out Audio Only TMDS341A 3x1 S W CVBS Y C MC33078 AMP L R RS232 RX TX DVI 4 2 2 20bit YC Full HD 1080P WXGA 768P RF Switc h DM1 DP 1 Serial TP 74HC04 SPDIF Out Coaxial Video Front End Dual HDMI Rx HD SD Video Encoder Audio DSP US...

Page 24: ...l Use Only C 2008 24 Check D901 Pin 1 Voltage Level 12V Check Power connector Replace Power board Check P903 33 TXAC 32 TXAC 17 TXBC 16 TXBC Maybe BCM3553 has problems Check LVDS Cable Check PDP LCD Module Control board Y N Y Y N Check L901 Voltage Level 12V Replace L901 Y N Y Replace Cable N No OSD ...

Page 25: ...oder Analog Digital Tuner TC90512 DVI I2S SIF SPDIF Out CVBS CVBS Y C Y Cb Cr R G B DDR1 64MB CS5340 L R Serial TP 20bits 12bit YC 4 2 2 NIM TUNER TMDS_RX EPM240F MNT out Audio Only TMDS341A 3x1 S W CVBS Y C MC33078 AMP L R RS232 RX TX DVI 4 2 2 20bit YC Full HD 1080P WXGA 768P RF Switc h DM1 DP 1 Serial TP 74HC04 SPDIF Out Coaxial Video Front End Dual HDMI Rx HD SD Video Encoder Audio DSP USB2 0 ...

Page 26: ...R153 R155 R152 Check BCM7412 Clock Hsync Vsync R1088 Typ 74 25MHz R1087 R1086 Y Y N Check Tuner 5V Power IC810 3 Pin Replace IC810 Y N Y Maybe BCM3553 IC100 has problems N Maybe BCM7412 IC1000 has problems N Check PLD Clock Hsync Vsync R1102 Typ 74 25MHz R1100 R1101 Y Redownload PLD file or replace N Maybe BCM3553 IC100 has problems Y Check D805 color Bad Tuner Replace Tuner None red Check BCM7412...

Page 27: ...coder Analog Digital Tuner TC90512 DVI I2S SIF SPDIF Out CVBS CVBS Y C Y Cb Cr R G B DDR1 64MB CS5340 L R Serial TP 20bits 12bit YC 4 2 2 NIM TUNER TMDS_RX EPM240F MNT out Audio Only TMDS341A 3x1 S W CVBS Y C MC33078 AMP L R RS232 RX TX DVI 4 2 2 20bit YC Full HD 1080P WXGA 768P RF Switc h DM1 DP 1 Serial TP 74HC04 SPDIF Out Coaxial Video Front End Dual HDMI Rx HD SD Video Encoder Audio DSP USB2 0...

Page 28: ... Only C 2008 28 Check RF Cable Check CVBS signal TU800 17 Pin Maybe Tuner TU800 has problems Check CVBS signal IC808 8 Pin Check CVBS signal C658 Y Y N Check Tuner 5V Power IC810 3 Pin Replace it Y N Y Replace IC808 or check L800 5V power N Replace it N Y Maybe BCM3553 IC100 has problems Analog TV Video ...

Page 29: ...coder Analog Digital Tuner TC90512 DVI I2S SIF SPDIF Out CVBS CVBS Y C Y Cb Cr R G B DDR1 64MB CS5340 L R Serial TP 20bits 12bit YC 4 2 2 NIM TUNER TMDS_RX EPM240F MNT out Audio Only TMDS341A 3x1 S W CVBS Y C MC33078 AMP L R RS232 RX TX DVI 4 2 2 20bit YC Full HD 1080P WXGA 768P RF Switc h DM1 DP 1 Serial TP 74HC04 SPDIF Out Coaxial Video Front End Dual HDMI Rx HD SD Video Encoder Audio DSP USB2 0...

Page 30: ...Internal Use Only C 2008 30 Check signal format Is it supported Check signal L700 L701 L702 L704 L705 L706 Replace it Check signal C638 C639 C640 C628 C629 C630 Y Y N Check J700 J702 Replace connector Y N Y Replace it N Maybe BCM3553 IC100 has problems Y Check Component Cable Component Video ...

Page 31: ... Decoder Analog Digital Tuner TC90512 DVI I2S SIF SPDIF Out CVBS CVBS Y C Y Cb Cr R G B DDR1 64MB CS5340 L R Serial TP 20bits 12bit YC 4 2 2 NIM TUNER TMDS_RX EPM240F MNT out Audio Only TMDS341A 3x1 S W CVBS Y C MC33078 AMP L R RS232 RX TX DVI 4 2 2 20bit YC Full HD 1080P WXGA 768P RF Switc h DM1 DP 1 Serial TP 74HC04 SPDIF Out Coaxial Video Front End Dual HDMI Rx HD SD Video Encoder Audio DSP USB...

Page 32: ...l format Is it supported Check signal Hsync Vsync C745 C746 C747 R839 R843 Replace it Check signal R727 R714 R729 Y Y N Check P701 Replace connector Y N Y Replace it N Maybe BCM3553 IC100 has problems Check L708 Voltage Level 9V Y Replace L708 Q701 Q702 Q703 N Check Signal C635 C636 C637 Y Replace it N Check RGB Cable Y RGB Video ...

Page 33: ... Decoder Analog Digital Tuner TC90512 DVI I2S SIF SPDIF Out CVBS CVBS Y C Y Cb Cr R G B DDR1 64MB CS5340 L R Serial TP 20bits 12bit YC 4 2 2 NIM TUNER TMDS_RX EPM240F MNT out Audio Only TMDS341A 3x1 S W CVBS Y C MC33078 AMP L R RS232 RX TX DVI 4 2 2 20bit YC Full HD 1080P WXGA 768P RF Switc h DM1 DP 1 Serial TP 74HC04 SPDIF Out Coaxial Video Front End Dual HDMI Rx HD SD Video Encoder Audio DSP USB...

Page 34: ...pported Check signal R755 Composite R814 R815 S Video Rear R855 Composite R856 R857 S Video Side Replace it Check signal C651 Composite C648 C649 S Video Rear C652 Composite C659 C660 S Video Rear Y N Check J701 Rear Check P700 Cable Side Replace connector Y N Y Replace it N Maybe BCM3553 IC100 has problems Y Check AV Cable S Video Cable Y AV Video ...

Page 35: ... Decoder Analog Digital Tuner TC90512 DVI I2S SIF SPDIF Out CVBS CVBS Y C Y Cb Cr R G B DDR1 64MB CS5340 L R Serial TP 20bits 12bit YC 4 2 2 NIM TUNER TMDS_RX EPM240F MNT out Audio Only TMDS341A 3x1 S W CVBS Y C MC33078 AMP L R RS232 RX TX DVI 4 2 2 20bit YC Full HD 1080P WXGA 768P RF Switc h DM1 DP 1 Serial TP 74HC04 SPDIF Out Coaxial Video Front End Dual HDMI Rx HD SD Video Encoder Audio DSP USB...

Page 36: ...J602 Replace connector Y N Y Check HDMI Cable Check EDID NVRAM IC602 603 604 Power I2C Signal 5 6 Replace it or redownload Y N Check HDCP Key NVRAM IC102 Power I2C Signal 5 6 Replace it Y N Check IC809 2 Pin Voltage Level 3 3V Replace it Y N Check L607 Voltage Level 3 3V Replace it Y N Check IC601 Clock Signal 26 27 Replace it Y N Maybe BCM3553 IC100 has problems HDMI Video ...

Page 37: ...coder Analog Digital Tuner TC90512 DVI I2S SIF SPDIF Out CVBS CVBS Y C Y Cb Cr R G B DDR1 64MB CS5340 L R Serial TP 20bits 12bit YC 4 2 2 NIM TUNER TMDS_RX EPM240F MNT out Audio Only TMDS341A 3x1 S W CVBS Y C MC33078 AMP L R RS232 RX TX DVI 4 2 2 20bit YC Full HD 1080P WXGA 768P RF Switc h DM1 DP 1 Serial TP 74HC04 SPDIF Out Coaxial Video Front End Dual HDMI Rx HD SD Video Encoder Audio DSP USB2 0...

Page 38: ...y audio Check Signal L504 L505 Replace it Check Signal L508 L509 L510 L511 Y N Check IC501 Power 19V 3 3V 1 8V L500 L501 L502 L503 Replace L Y N Y Replace it N Check Connector P500 Y Check BCM3553 I2S Output R627 R628 R629 Y Replace it N Replace connector N Check speaker Y Replace speaker N Maybe NTP3000 has problems Replace it Y All Source Audio ...

Page 39: ...coder Analog Digital Tuner TC90512 DVI I2S SIF SPDIF Out CVBS CVBS Y C Y Cb Cr R G B DDR1 64MB CS5340 L R Serial TP 20bits 12bit YC 4 2 2 NIM TUNER TMDS_RX EPM240F MNT out Audio Only TMDS341A 3x1 S W CVBS Y C MC33078 AMP L R RS232 RX TX DVI 4 2 2 20bit YC Full HD 1080P WXGA 768P RF Switc h DM1 DP 1 Serial TP 74HC04 SPDIF Out Coaxial Video Front End Dual HDMI Rx HD SD Video Encoder Audio DSP USB2 0...

Page 40: ...r training and service purposes LGE Internal Use Only C 2008 Check video output Follow procedure All source audio trouble shooting Y Follow procedure digital TV video trouble shooting N N Maybe BCM3553 internal audio DSP has problems Replace it Digital TV Audio ...

Page 41: ...coder Analog Digital Tuner TC90512 DVI I2S SIF SPDIF Out CVBS CVBS Y C Y Cb Cr R G B DDR1 64MB CS5340 L R Serial TP 20bits 12bit YC 4 2 2 NIM TUNER TMDS_RX EPM240F MNT out Audio Only TMDS341A 3x1 S W CVBS Y C MC33078 AMP L R RS232 RX TX DVI 4 2 2 20bit YC Full HD 1080P WXGA 768P RF Switc h DM1 DP 1 Serial TP 74HC04 SPDIF Out Coaxial Video Front End Dual HDMI Rx HD SD Video Encoder Audio DSP USB2 0...

Page 42: ...heck video output Follow procedure All source audio trouble shooting Y Follow procedure analog TV video trouble shooting N N Maybe BCM3553 audio block has problems Replace it Check L801 voltage level 5V Replace it N Y Check SIF signal C801 C806 Q800 Replace it N Y Check SIF signal R726 C665 Replace it N Y Analog TV Audio ...

Page 43: ...er Analog Digital Tuner TC90512 DVI I2S SIF SPDIF Out CVBS CVBS Y C Y Cb Cr R G B DDR1 64MB CS5340 L R Serial TP 20bits 12bit YC 4 2 2 NIM TUNER TMDS_RX EPM240F MNT out Audio Only TMDS341A 3x1 S W CVBS Y C MC33078 AMP L R RS232 RX TX DVI 4 2 2 20bit YC Full HD 1080P WXGA 768P RF Switc h DM1 DP 1 Serial TP 74HC04 SPDIF Out Coaxial Video Front End Dual HDMI Rx HD SD Video Encoder Audio DSP USB2 0 PK...

Page 44: ... R816 C700 R817 AV Rear C729 R858 C728 R859 AV Side Replace it N Y Check IC500 power L512 voltage level 9V Replace it N Y Check signal R532 R533 C555 R568 C563 R582 Replace it or IC500 N Y Check IC503 power L513 voltage level 9V Replace it N Y Check signal C554 R569 R581 C562 Replace it or IC503 N Y Check IC502 power L514 voltage level 3 3V L515 voltage level 5V Replace it N Y Check IC502 power L5...

Page 45: ... Decoder Analog Digital Tuner TC90512 DVI I2S SIF SPDIF Out CVBS CVBS Y C Y Cb Cr R G B DDR1 64MB CS5340 L R Serial TP 20bits 12bit YC 4 2 2 NIM TUNER TMDS_RX EPM240F MNT out Audio Only TMDS341A 3x1 S W CVBS Y C MC33078 AMP L R RS232 RX TX DVI 4 2 2 20bit YC Full HD 1080P WXGA 768P RF Switc h DM1 DP 1 Serial TP 74HC04 SPDIF Out Coaxial Video Front End Dual HDMI Rx HD SD Video Encoder Audio DSP USB...

Page 46: ... LGE Internal Use Only C 2008 Check video output Follow procedure All source audio trouble shooting Y Follow procedure HDMI video trouble shooting N N Maybe BCM3553 audio block has problems Replace it Check EDID NVRAM IC602 603 604 Power I2C Signal 5 6 Replace it or redownload Y N HDMI AUDIO ...

Page 47: ...EG4 Decoder Analog Digital Tuner TC90512 DVI I2S SIF SPDIF Out CVBS CVBS Y C Y Cb Cr R G B DDR1 64MB CS5340 L R Serial TP 20bits 12bit YC 4 2 2 NIM TUNER TMDS_RX EPM240F MNT out Audio Only TMDS341A 3x1 S W CVBS Y C MC33078 AMP L R RS232 RX TX DVI 4 2 2 20bit YC Full HD 1080P WXGA 768P RF Switc h DM1 DP 1 Serial TP 74HC04 SPDIF Out Coaxial Video Front End Dual HDMI Rx HD SD Video Encoder Audio DSP ...

Page 48: ...eck USB 2 0 Cable Check L205 voltage level 5V Y N Replace it or IC202 Check P201 Replace it Y N Check USB Device If device is 2 5 inch HDD check power adaptor Y Maybe BCM3553 has problems Y Exception USB power could be disabled by inrushing current In this case remove the device and try to reboot the TV AC power off on USB ...

Page 49: ...CM7412 MPEG4 Decoder Analog Digital Tuner TC90512 DVI I2S SIF SPDIF Out CVBS CVBS Y C Y Cb Cr R G B DDR1 64MB CS5340 L R Serial TP 20bits 12bit YC 4 2 2 NIM TUNER TMDS_RX EPM240F MNT out Audio Only TMDS341A 3x1 S W CVBS Y C MC33078 AMP L R RS232 RX TX DVI 4 2 2 20bit YC Full HD 1080P WXGA 768P RF Switc h DM1 DP 1 Serial TP 74HC04 SPDIF Out Coaxial Video Front End Dual HDMI Rx HD SD Video Encoder A...

Page 50: ...ctrical 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 of manufactu...

Page 62: ...Jun 2008 Printed in Korea P NO MFL41588002 ...

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