LG 42PC3R Series Service Manual Download | Manualshive

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6. In case of no sound

(1) Symptom

1) LED is green.
2) Screen display but sound is not output.

(2) Check 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

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Summary of Contents for 42PC3R Series

Page 1: ...TV SERVICE MANUAL CAUTION BEFORE SERVICING THE CHASSIS READ THE SAFETY PRECAUTIONS IN THIS MANUAL CHASSIS PP62A MODEL 42PC3R 42PC3R ZH website http biz LGservice com e mail http www LGEservice com techsup html ...

Page 2: ... 3 DESCRIPTION OF CONTROLS 4 SPECIFICATIONS 10 ADJUSTMENT INSTRUCTIONS 12 TROUBLE SHOOTING GUIDE 17 PRINTED CIRCUIT DIAGRAM 25 BLOCK DIAGRAM 27 EXPLODED VIEW 28 EXPLODED VIEW PARTS LIST 29 REPLACEMENT PARTS LIST 30 SCHEMATIC DIAGRAM ...

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: ...ttons are used for teletext only TELETEXT models or Programme edit Switches the sub picture PIP DW POP or off mode Adjusts the sub picture size Moves the sub picture Selects a programme for the sub picture Exchanges the main sub images in PIP Twin picture mode Selects the input source for the sub picture in PIP Twin picture mode Controls some video cassette recorders or DVD players when you have a...

Page 5: ... e e e e e e e e e e e e e e e e e e e e e g g g g g g e e h h h h h h e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e g g g g g g e e h h h...

Page 6: ...PR VOL OK MENU INPUT Remote Control Sensor Power Standby Indicator illuminates red in standby mode illuminates white when the set is switched on PROGRAMME Buttons VOLUME Buttons OK Button MENU Button INPUT Button ON OFF Button ...

Page 7: ...r surround sound system Euro Scart Socket AV1 AV2 Connect scart socket input or output from an external device to these jacks Power Cord Socket This TV operates on an AC power The voltage is indicated on the Specifications page Never attempt to operate the TV on DC power Remote Control Port HDMI Input Connect a HDMI signal to HDMI IN Connect DVI VIDEO signal to HDMI DVI port with DVI to HDMI cable...

Page 8: ...IP INPUT DVD ARC EXIT VOL TIME REVEAL INDEX Q VIEW MUTE PR SLEEP LIST I II MENU TEXT PIP SIZE POSTION VCR POWER 1 2 3 4 5 6 7 8 9 10 FAV Remote Control Power Cord 2 Wall brackets 2 eye bolts 2 bolts for stand assembly For 42PC1R 42PC3R 50PC1R Polishing Cloth Polish the screen with the cloth Option ...

Page 9: ...outward O Place the set with the screen facing down on a cushion or soft cloth as shown in Figures 1 Before unfolding the stand please make sure two locks A on the bottom of the stand push outward O Pull the stand out as shown above in Figures 2 3 After unfolding the stand please insert and tighten the screws in the holes B on the bottom of the stand O When connecting cables to the set Do not dise...

Page 10: ... 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 CE IEC specification EMC CE IEC V General Specification 1 Module Specification 1 1 42 XGA MODULE 10 Display Screen Device Aspect Ratio PDP Module Operating Environment Storage Environment Input Voltage 1 2 3 4 5 6 No Item Specific...

Page 11: ...1 S47 Upper Heterodyne PAL SECAM NTSC NTSC4 43 PAL SECAM NTSC NTSC4 43 PAL SECAM NTSC NTSC4 43 Y Cb Cr Y Pb Pr RGB PC RGB DTV HDMI PC HDMI DTV PC Audio Component 1EA AV 1EA 4 System PAL SECAM NTSC PAL60 4 System PAL SECAM NTSC PAL60 4 System PAL SECAM NTSC PAL60 L R Input Display Screen Device Aspect Ratio PDP Module Operating Environment Storage Environment Input Voltage 1 2 3 4 5 6 No Item Speci...

Page 12: ...s 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 is NG then set...

Page 13: ...t 100 Color Bar Pattern 5 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 5 5 3 Method of Auto RGB Color Balance 1 Input the Component 720p 100 Color Bar signal into Component1 or Component2 2 Set the PSM to Dynamic mode in Picture menu 3 Press INSTART key on R C for adjustm...

Page 14: ...abel of panel right top Deviation 0 5V 8 EDID The Extended Display Identification Data DDC Display Data Channel download 8 1 Required Test Equipment 1 Adjusting PC with S W for writing EDID Data S W EDID TESTER Ver 2 5 2 A Jig for EDID Download 3 Cable Serial 9Pin or USB to D sub 15Pin cable D sub 15Pin cable DVI to HDMI cable 8 2 Setting of device 8 3 Preparation for Adjustment 1 As above Fig 8 C...

Page 15: ...the White Balance adjustment mode by pressing the INSTART key twice White Balance on R C 4 Stick sensor to center of the screen and select each items Red Green Blue Gain and Offset using D E CH key on R C 5 Adjust Only High Light with R Gain B Gain using F G VOL key on R C 6 Adjust it until color coordination becomes as below Initially R G B gain and R G B offset values are fixed as below Red Gain...

Page 16: ... 16 11 2 White Balance 12 Power off History 1 This function indicated Power off history 2 You can go into this mode by ADJ key in ADJ remocon Fig 13 Power off History Fig 12 Default Value on OSD 89 ...

Page 17: ...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 18: ... 18 1 2 Power Board Structure ...

Page 19: ...lter 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 13P of VSC Board Cable connected Connect the Cable Yes No After the cable connect is removed 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 20: ...age 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 r...

Page 21: ... D Is the Fuse FS2 normal on Y B D In case of open is replace Yes No Yes Yes Replace Z Board Is the Z Board normal Is normal the output voltage after remove P1 connector of Z B D Is the Fuse FS1 FS2 normal on Z B D 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 remove P1 P2 P3 output voltage normality Replac...

Page 22: ...rged 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 FIL8662 IC IC800 Operates Replace FIL8662 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 23: ...s the Tuner Cable connected well Cable inserts well Yes No No Yes Is the FIL8662 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 normal the Input voltage IIC Communication and HV sync No Replace the IC No Is the CXA2069Q normal Yes Is the FIL8662 normal Is the Input volta...

Page 24: ... 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 25: ... 25 PRINTED CIRCUIT BOARD MAIN TOP CONTROL ...

Page 26: ... 26 MAIN BOTTOM PRE AMP ...

Page 27: ... 27 BLOCK DIAGRAM ...

Page 28: ... 28 EXPLODED VIEW 203 204 206 200 580 205 201 202 400 240 250 430 301 304 303 302 501 520 502 560 300 570 120 121 ...

Page 29: ...TTOM 42PC1R TA C SKD 303 4980900115B Supporter ASSY AL FILTER RIGHT 42PC1R TA C SKD 304 4980900116B Supporter ASSY AL FILTER LEFT 42PC1 TA C SKD 400 3809900103T Cover Assembly 42PC3 LGEMA NO HANDLE PHANTOM ASSY 430 3501900014C Base Assembly AP 42DC11 MF056A D T SPK STAND FOLDING STAND LGERS C SKD 501 3301900095B Plate Assembly AV 42PC CORTEZ A 3301900095P Plate Assembly AV H3 C SKD 502 3301900094A...

Page 30: ...RSE00048A 0DRSE00048A 0DRSE00048A KTA1504S PNP 5V 50V 50V 0 15A 2SC3875S NPN 5V 60V 50V 150MA 100NA KTA1504S PNP 5V 50V 50V 0 15A 2SC3875S NPN 5V 60V 50V 150MA 100NA KTA1504S PNP 5V 50V 50V 0 15A KTA1504S PNP 5V 50V 50V 0 15A 2SC3875S NPN 5V 60V 50V 150MA 100NA 2SC3875S NPN 5V 60V 50V 150MA 100NA 2SC3875S NPN 5V 60V 50V 150MA 100NA 2SC3875S NPN 5V 60V 50V 150MA 100NA 2SC3875S NPN 5V 60V 50V 150MA ...

Page 31: ...4 C1035 C1036 C1037 C1039 C104 C1040 C1041 C1042 C1044 C1045 C1046 C1047 C1048 C1049 C105 C1050 C1051 C1053 C1054 C1058 C1059 C1060 C1061 C1062 C1063 C1064 C1065 C1066 C1067 C1068 C1069 C1070 C1071 C1072 C1073 C1074 C1075 C1076 C1077 C1078 C1079 C108 C1080 C1081 C1082 C1083 C1084 C1085 C1086 0CK104CK56A 0CK104CK56A 0CK103CK56A 0CK103CK56A 0CK104CK56A 0CK104CK56A 0CK103CK56A 0CE4763F618 0CK103CK56A...

Page 32: ... 0603B102K500CT 1n 10 50V X7R LOCA NO PART NO DESCRIPTION C1140 C1141 C1142 C1143 C1144 C1145 C1146 C1147 C1148 C1149 C115 C1150 C1151 C1152 C1153 C1154 C1155 C1156 C1157 C1158 C116 C117 C118 C119 C120 C1200 C1201 C1205 C1207 C121 C1212 C1213 C1214 C1215 C1216 C1217 C1218 C1219 C122 C1220 C1221 C1222 C1223 C1224 C1225 C1226 C1227 C1228 C1229 C123 C1230 C1231 0CK104CK56A 0CK104CK56A 0CK104CK56A 0CK...

Page 33: ...35V 760MA LOCA NO PART NO DESCRIPTION C1447 C1448 C1449 C1450 C1455 C1456 C1457 C1458 C1459 C1460 C1461 C1466 C1467 C1468 C1469 C147 C1470 C1473 C1474 C1475 C1476 C148 C149 C150 C151 C152 C174 C175 C178 C1800 C1801 C1802 C1803 C1804 C1805 C1806 C1807 C1808 C1809 C1810 C1811 C1812 C1813 C1814 C1851 C1852 C200 C201 C206 C207 C208 C211 0CK103CK56A 0CK103CK56A 0CK103CK56A 0CK103CK56A 0CK104CK56A 0CK10...

Page 34: ...NO PART NO DESCRIPTION C348 C349 C350 C351 C352 C353 C354 C355 C356 C357 C401 C402 C403 C405 C406 C409 C411 C412 C414 C415 C416 C428 C429 C430 C431 C432 C433 C434 C435 C436 C437 C438 C439 C441 C442 C444 C445 C446 C451 C452 C457 C458 C459 C462 C463 C464 C466 C467 C469 C479 C483 C493 0CK104CK56A 0CE476SF6DC 0CC102CK41A 0CE105SK6DC 0CK563CK56A 0CK223CK56A 0CE105SK6DC 0CK821CK56A 0CK104CK56A 0CK103CK5...

Page 35: ...V X7R LOCA NO PART NO DESCRIPTION C833 C834 C835 C836 C837 C838 C839 C840 C841 C842 C843 C844 C845 C846 C847 C848 C849 C850 C851 C852 C853 C854 C855 C856 C857 C858 C859 C860 C861 C862 C863 C864 C865 C866 C867 C868 C869 C870 C871 C872 C873 C874 C875 C876 C877 C878 C879 C880 C881 C882 C883 C884 0CK104CK56A 0CE226SF6DC 0CE226SF6DC 0CE226SF6DC 0CE226SF6DC 0CE226SF6DC 0CE226SF6DC 0CE226SF6DC 0CE226SF6D...

Page 36: ... 50V X7R LOCA NO PART NO DESCRIPTION C938 C939 C940 C941 C942 C943 C944 C945 C946 C947 C948 C949 C950 C951 R156 L1000 L1101 L1105 L1106 L1107 L1110 L1404 L1405 L1406 L1407 L101 L102 L103 L104 L105 L106 L107 L108 L109 L110 L111 L112 L120 L121 L122 L123 L204 L206 L311 L407 L408 C1 C2 0CK103CK56A 0CK104CK56A 0CK103CK56A 0CK104CK56A 0CK103CK56A 0CE226SF6DC 0CK104CK56A 0CK104CK56A 0CE226SF6DC 0CE226SF6...

Page 37: ...M LOCA NO PART NO DESCRIPTION L1014 L1015 L1016 L1017 L1018 L1019 L1020 L1021 L1022 L1102 L1103 L1104 L1108 L1109 L1111 L1112 L1113 L1114 L1115 L1116 L113 L114 L115 L116 L117 L118 L119 L1200 L1201 L1202 L1203 L124 L125 L1819 L1820 L1821 L1822 L1823 L1852 L1853 L1854 L1855 L1856 L1857 L1858 L1859 L203 L205 L308 L309 L310 L400 6200J000013 6200J000013 6200J000013 6200J000013 6200J000013 6200J000013 6...

Page 38: ...KHZ Crystal HC 49 U 18 432MHZ 30PPM Crystal ABLS 19 6608MHZ 22 B 4Y T Scart UPJ R1 031 21P 21P 1C 3 81MM Scart UPJ R1 031 21P 21P 1C 3 81MM RCA PPJ209 02 14 0MM 1RX5C RCA KCN BT 0 0048 14 0MM 1RX1C DIN PSJ014 01 SOCKET 4P ANGLE Complex KCN BT 0 0055 4P PAL RCA DIN DC1R019WDH SOCKET 21P DIN DC1R019WDH SOCKET 21P RCA RCA 1302A 54G YUQIU 15MM Phone PEJ024 01 1P 4P STRAIGHT Phone PEJ024 01 1P 4P STRAI...

Page 39: ...HDMI CORTEZ ...

Page 40: ...POWER DDR MEMORY RS232C ...

Page 41: ...Apr 2006 Printed in Korea P NO 38289S0024B ...

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