LG 50PX4D Service Manual Download Page 1

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PLASMA TV

SERVICE MANUAL

CAUTION

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

CHASSIS : DF-054B

MODEL : 50PX4D

50PX4D-EB

website:http://biz.LGservice.com

e-mail:http://www.LGEservice.com/techsup.html

Summary of Contents for 50PX4D

Page 1: ...V SERVICE MANUAL CAUTION BEFORE SERVICING THE CHASSIS READ THE SAFETY PRECAUTIONS IN THIS MANUAL CHASSIS DF 054B MODEL 50PX4D 50PX4D EB website http biz LGservice com e mail http www LGEservice com techsup html ...

Page 2: ...ION OF CONTROLS 4 SPECIFICATIONS 8 ADJUSTMENT INSTRUCTIONS 10 TROUBLE SHOOTING GUIDE 15 PRINTED CIRCUIT DIAGRAM 24 BLOCK DIAGRAM 28 EXPLODED VIEW 30 EXPLODED VIEW PARTS LIST 31 REPLACEMENT PARTS LIST 32 SCHEMATIC DIAGRAM PRINTED CIRCUIT BOARD ...

Page 3: ... 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 to the chassis the measur...

Page 4: ...ogramme NUMBER buttons D A TV selects analogue or digital mode MODE Selects another device GUIDE shows a programme schedule In Digital mode only VCR BUTTONS Controls a video cassette recorder These buttons are used for X Studio For further details see the X Studio section MENU Displays on screen menus one by one Exits the current menu Memorizes menu changes TEXT These buttons are used for teletext...

Page 5: ...menus one by one Exits the current menu Memorizes menu changes 5 OK Accepts your selection or displays the current mode 6 D D E E Programme Up Down Selects a programme or a menu item Switches the set on from standby F F G G Volume Up Down Adjusts the volume Adjusts menu settings 7 Power Indicator Illuminates red in standby mode Illuminates green when the set is turned on 8 Intelligent Eye Adjusts ...

Page 6: ...se sockets S VIDEO AUDIO IN SOCKETS Connect the S VIDEO out socket of an VCR to the S VIDEO socket Connect the audio out sockets of the VCR to the audio sockets as in AV4 8 COMPONENT INPUT Connect DVD video outputs to Y PB PR of COMPONENT INPUT and audio outputs to Audio sockets of AUDIO INPUT 9 EURO SCART SOCKET Connect the euro scart socket of the VCR to these sockets Note a If you want to use t...

Page 7: ...ll mounting bracket Video cables Audio cables Ceiling mounting bracket 40 42 50 42 40 Secure the set assembly by fixing it to a wall by using the Eye Bolts Wall brackets Joining the set assembly to the wall to prevent the set tumbling If the set is to be mounted on a desk top insert the 2 Eye Bolts and tighten them securely in the upper holes as shown Install the wall brackets on the wall with 2 b...

Page 8: ...ication by part number in accordance with BOM 5 The receiver must be operated for about 20 minutes prior to the adjustment V Test Method 1 Performance LGE TV test method followed 2 Demanded other specification Safety IEC EN60065 EMI EN55013 EMS EN55020 V General Specification 1 Module Specification Display Screen Device Aspect Ratio PDP Module Screen Filter Operating Environment Storage Environmen...

Page 9: ... 3 4 5 6 7 8 9 10 11 12 No Item Specification Remark The United Kingdom 1 PAL BG DK I 2 SECAM L L 4 DVB T ID TV Analog Upper Heterodyne Digital COFDM PAL SECAM PAL SECAM NTSC PAL SECAM NTSC Y Cb Cr Y Pb Pr RGB PC RGB DTV HDMI PC HDMI DTV SOUND PC Audio Component AV 2EA Discrete IR SM MM SD MS MS Pro CF Microdrive Masicstor XD UK 4 System PAL SECAM NTSC PAL60 4 System PAL SECAM NTSC PAL60 L R Input...

Page 10: ...l pattern cross hatch pattern after image may be occur in the black level part of the screen 3 Channel memory 3 1 Setting up the LGIDS 1 Install the LGIDS idsinst exe 2 After installation restart your PC 3 Extract files zip to folder c LGIDS files 4 Start LGIDS 3 2 Channel memory Method 1 Select PDP and Hurricane on Model dialog And check your connection in Communication dialog If your connection ...

Page 11: ...ect terminal of D M M to Va pin of P807 connect terminal to GND pin of P807 3 After turning RV501 voltage of D M M adjustment as same as Va voltage which on label of panel right top Deviation 0 5V 2 Vs Adjustment 1 Connect terminal of D M M to Vs pin of P807 connect terminal to GND pin of P807 2 After turning RV401 voltage of D M M adjustment as same as Va voltage which on label of panel right top...

Page 12: ...maximum White level is not correct select 100 color bar pattern 8 2 Required Equipment 1 Remote controller for adjustment 2 AV Pattern Generator 802F Pattern Generator Master MSPG 925FA etc Which has PAL Composite Video format output with standard 1 0 Vpp Vertical 100 Color Bar Pattern as Fig7 8 3 Method of Auto AV CVBS Color Balance 1 Input the PAL Composite Video into video input Input 50Hz 42PX...

Page 13: ... the pattern with REV key when using Master pattern generator like MSPG 925 V If Minimum Black Level and or Maximum White Level is not correct select 100 Color Bar Pattern 9 2 Required Test Equipment 1 Remote controller for adjustment 2 802F Pattern Generator Which has 720p Ypbpr output with Standard 0 7Vpp Vertical 100 Color Bar Pattern as Fig 10 9 3 Method of auto component color balance 1 Input...

Page 14: ...ue in adjustment mode 12 1 Auto Color Balance Component RGB 12 2 White Balance Fig 13 Default Value on OSD Fig 12 Default Value on OSD Auto Color Balance HEX Auto RGB G To Set Source Cortez Red Offset1 22 Green Offset1 24 Blue Offset1 23 Red Offset2 45 Green Offset2 43 Blue Offset2 37 Red Gain 014 Green Gain 031 Blue Gain 011 Reset G To Set White Balance Hex Red Gain 82 Red Offset 80 Green Gain 86...

Page 15: ...Doesn t the high tension output come out Doesn t the VSC signal Vs ON come out Yes Yes Does high tension output voltage Drop occur When the Y B D Module input connector is removed does output voltage drop occur When the Y Z B D Module input connector is remove does Power Board hightension output voltage Drop occur Yes No No 9 Check the Power Board Output high tension circuit Yes 10 Check the Z B D...

Page 16: ... 16 1 2 Sony Power Board Structure 1 2 3 T502 Vs Trans T702 Va Trans T101 St by Trans T103 Low Voltage Trans ...

Page 17: ... 17 1 3 Sanken LGIT Power Board Structure 1 2 3 T221 Vs Trans T271 Va Trans T121 St by Trans T201 Low Voltage Trans ...

Page 18: ... Line Filter and Power Board Cable connected Connect the Cable Yes No Is the Fuse F101 on Power Board normal Replace the Fuse Yes No Is the Power Board and 7P of VSC Board Cable connected Connect the Cable Yes No After the cable connect is remved to Power Board except the CN101 connection cable the AC voltage marking is authorized on manual When ST BY 5V is not operated replace Power Board ...

Page 19: ...ltage normal after remove P5 P6 connector of Y B D Is the Fuse FS2 on Y B D normal In case of open is replace Yes No Yes Yes Replace Z Board Is the Z Board normal Is the output voltage normal after remove P1 connector of Z B D Is the Fuse FS1 FS2 on Z B D normal In case of open is replace Yes No Yes Is the X Board normal Is the output voltage normal after remove P1 2 3 4 5 connector of X B D After...

Page 20: ...f Y B D Is the Fuse FS2 on Y B D normal In case of open is replace Yes No Yes Yes Replace Z Board Is the Z Board normal Is the output voltage normal after remove P1 connector of Z B D Is the Fuse FS1 FS2 on Z B D normal In case of open is replace Yes No Yes Is the X Board normal Is the output voltage after remove P1 2 3 4 5 connector ofX B D normal After remove P1 P2 P3 output voltage normality Re...

Page 21: ...charged continuously becomes accomplished from module 2 Check following Is the LVDS cable normal Is the VSC Board normal Is the LVDS cable connected well Cable inserts well Yes No No Yes Does the FIL8532 IC IC800 Operate Replace FIL8532 IC IC800 No Is the Ctrl Board of Module normal Replace Ctrl B D No No Yes Replace VSC B D Replace the cable Yes ...

Page 22: ...Is the Tuner Cable connected well Cable inserts well Yes No No Yes Is the FIL8532 normal Replace the Tuner No Is the Input voltage IIC Communication and CVBS output normal Yes Is the Input voltage IIC Communication and HV sync normal No Replace the IC No Is the Input voltage IIC Communication and HV sync normal No Replace the IC No Is the CXA2069Q normal Yes Is the FIL8532 normal Is the Input volt...

Page 23: ...k following Is the SPK cable normal Is the SPK cable connected well Cable inserts well No No Replace IC400 No Replace IC401 No Replace SPK cable Yes Yes Is the RF AV Component RGB HDMI sound normal No Does IC400 Operates Does IC401 Operates Replace IC402 No Does IC402 Operates Replace VSC B D Yes Yes ...

Page 24: ... 24 PRINTED CIRCUIT BOARD MAIN TOP ...

Page 25: ... 25 MAIN BOTTOM ...

Page 26: ... 26 DIGITAL TOP SIDE A V TOP BOTTOM ...

Page 27: ... 27 DIGITAL BOTTOM CONTROL TOP CONTROL BOTTOM ...

Page 28: ... 28 EPF TOP EPF BOTTOM LED TOP LED BOTTOM ...

Page 29: ...AGRAM Wired IR Variable_L R Comp_L R EPF_R L Wired_IR HDMI_Data 24bit A H V SYNC CLK DE 4bit RS232_Rx TX_Hud X2 SPDIF_out_B Comp DTV_LRout TV_LRout DTV Sound 3bit 74LCX157 SPDIF_out SPDIF_out_A SPDIF_out_B Y Pb Pr ...

Page 30: ... 30 EXPLODED VIEW 301 304 302 303 121 601 600 305 204 206 207 208 203 202 201 501 520 560 401 207 300 308 309 531 530 570 700 550 200 120 580 410 101 103 102 420 400 430 ...

Page 31: ...AL FILTER SIDE R 50PX40 SKD 304 4980V01144C SUPPORTER ASSY AL FILTER SIDE L 50PX40 SKD 305 5230V00025A FILTER MECH RZ 50PX10 LG CHEMICAL GLASS FILTER 308 3090V00635A CABINET 50PX40 PDP 309 3211V00186F FRAME ASSEMBLY FRONT 50PX4D EB DI EPF 400 3809V00515H BACK COVER ASSEMBLY RZ 50PX41S SKD 401 3301V00090A PLATE ASSEMBLY AV 3300V00593A PLATE COVER SIDE 50PX4D EB 410 4980V01194D SUPPORTER ASSY AL 50P...

Page 32: ...0AA 0TR387500AA 0TR387500AA 0TR387500AA 0TR387500AA 0TR102008AA 0TR387500AA 0TR387500AA 0TR387500AA LMS1587CS ADJ 3P TO 263 R TP 1 5V LMS1587CS ADJ 3P TO 263 R TP 1 5V 24LC02BT I SNG PB FREE MICRO THC63LVD103 64P TQFP 74HC14D 14SOP TP SHITTER TRIGGER UDA1334BTS PHILIPS SSOP 16P SC1565IST 1 8 SEMTECH 3P SOT223 TP SC1592ISTRT PB FREE SEMTECH SOIC 8P ICL3232CBNZ INTERSIL 16P SOP KIA78R09F KEC 5PIN DP...

Page 33: ... D110 D1100 D1105 D1106 D1107 D1109 D111 D1110 D1200 D201 D201 D300 D401 D500 D501 D502 D504 D505 D506 D600 ZD100 ZD101 ZD102 ZD301 ZD302 ZD400 ZD600 C1000 C1005 C1007 C1009 C101 C1010 C1019 C102 C103 C103 C1030 C104 C1043 C1046 C1047 C105 C1050 C1051 C106 0DD226239AA 0DD226239AA 0DD226239AA 0DD226239AA 0DD226239AA 0DD226239AA 0DD226239AA 0DD226239AA 0DD226239AA 0DD226239AA 0DD226239AA 0DD226239AA...

Page 34: ... LOCA NO PART NO DESCRIPTION C116 C1160 C1162 C1165 C1166 C117 C118 C1185 C1186 C1187 C1188 C1189 C119 C119 C1190 C1191 C1192 C1193 C1195 C1199 C120 C1200 C1201 C121 C121 C122 C1225 C123 C1230 C1231 C1245 C1247 C126 C1304 C1306 C1307 C131 C1310 C1313 C1318 C132 C1321 C1333 C1334 C1335 C1338 C140 C1404 C1405 C1431 C1432 C144 0CK103CK56A 0CE107SF6DC 0CE107SF6DC 0CE107SF6DC 0CE107SF6DC 0CE227SF6DC 0C...

Page 35: ... 20 R TP SMD SMD LOCA NO PART NO DESCRIPTION C293 C300 C301 C302 C302 C303 C304 C304 C304 C305 C305 C306 C307 C308 C308 C309 C312 C313 C316 C317 C319 C320 C321 C322 C324 C327 C328 C332 C335 C338 C343 C344 C349 C351 C353 C402 C403 C403 C404 C404 C405 C406 C407 C408 C409 C410 C412 C412 C413 C413 C418 C418 0CE477SF6DC 0CE226SF6DC 0CK104CF56A 0CE107SF6DC 0CK104CF56A 0CK104CF56A 0CE226SF6DC 0CE226SF6DC...

Page 36: ...P X7R 22UF MVG 16V 20 SMD R TP LOCA NO PART NO DESCRIPTION C522 C523 C524 C525 C525 C526 C527 C528 C529 C530 C531 C532 C533 C534 C610 C614 C615 C620 C621 C622 C624 C627 C728 C729 C730 C731 C735 C737 C739 C745 C750 C752 C760 C762 C764 C767 C771 C832 C833 C834 C835 C836 C837 C838 C839 C840 C851 C853 C884 C896 C901 C904 0CE476SF6DC 0CK104CF56A 0CE476SF6DC 0CE106SH6DC 0CK103CK56A 0CE476SF6DC 0CK103CK5...

Page 37: ...R817 R222 R618 0RRZVTA001D 0RRZVTA001D 0RRZVTA001D 0RRZVTA001D 0RRZVTA001E 0RRZVTA001D 0RRZVTA001E 0RRZVTA001D 0RRZVTA001E 0RRZVTA001D 0RRZVTA001E 0RRZVTA001D 0RRZVTA001D 0RRZVTA001D 0RRZVTA001D 0RRZVTA001D 0RRZVTA001D 0RRZVTA001D 0RRZVTA001D 0RRZVTA001D 0RRZVTA001D 0RRZVTA001D 0RRZVTA001D 0RRZVTA001D 0RRZVTA001D 0RRZVTA001D 0RRZVTA001D 0RRZVTA001D 0RRZVTA001D 0RRZVTA001D 0RRZVTA001D 0RRZVTA001D 0...

Page 38: ...L1107 L1108 L1109 L111 L111 L1110 L1111 L1112 L1113 L1114 L1115 L1116 L1117 L1118 L1119 L112 L1120 L1121 L1122 L1123 L1125 L1126 L1127 L1128 L1129 L113 L1130 L1131 L1132 L114 L116 L117 L1204 L1205 L1206 L1207 L1208 L1209 6210VC0006A 6210VC0006A 6210VC0006A 6210VC0006A 6210VC0006A 6210VC0006A 6210VC0006A 6210VC0006A 6210VC0006A 6210VC0006A 6210VC0006A 6210VC0006A 6210VC0006A 6210VC0006A 6210VC0006A...

Page 39: ...FBMH3216 HM501NT 3 2X1 6X1 6MM R TP FBMH3216 HM501NT 3 2X1 6X1 6MM R TP FBMH3216 HM501NT 3 2X1 6X1 6MM R TP FBMH3216 HM501NT 3 2X1 6X1 6MM R TP FBMH3216 HM501NT 3 2X1 6X1 6MM R TP MLB 201209 1000L N2 R TP 1000OHM 350MA MLB 201209 1000L N2 R TP 1000OHM 350MA FBMH3216 HM501NT 3 2X1 6X1 6MM R TP FBMH3216 HM501NT 3 2X1 6X1 6MM R TP FBMH3216 HM501NT 3 2X1 6X1 6MM R TP FBMH3216 HM501NT 3 2X1 6X1 6MM R T...

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Page 44: ...Jun 2005 Printed in Korea P NO 3828VD0221E ...

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