LG RT-52SZ30RB, Service Manual

Page 1: ...ERVICE MANUAL CAUTION BEFORE SERVICING THE CHASSIS READ THE SAFETY PRECAUTIONS IN THIS MANUAL CHASSIS MB 03CA MODEL RT 52SZ30RB RP website http biz LGservice com e mail http www LGEservice com techsup html Jul 2003 Printed in Korea P NO 3828VD0133G ...

Page 2: ...Y PRECAUTIONS 3 SERVICING PRECAUTIONS 4 CONTROL DESCRIPTIONS 6 SPECIFICATIONS 10 ADJUSTMENT INSTRUCTIONS 14 BLOCK DIAGRAM 20 PRINTED CIRCIUT BOARD 25 EXPLODED VIEW 34 EXPLODED VIEW PARTS LIST 35 REPLACEMENT PARTS LIST 36 SVC SHEET ...

Page 3: ...perform an AC leakage current check on the exposed metallic parts of the cabinet such as antennas terminals etc to be sure the set is safe 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 positioin connect one lead of...

Page 4: ...s are integrated circuits and some fieldeffect transistors and semicounductor chip components The following techniques should be used to help reduce the incidence of component damage caused by static by static electricity 1 Immediately before handling any semiconductor component or semiconductor equipped assembly drain off any electostatic charge on your body by touching a known earth ground Alter...

Page 5: ...the corresponding lead on the circuit board 4 Securely crimp each connection and solder it 5 Inspect on the circuit board copper side 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 ...

Page 6: ...motion of the sub picture POSITION relocates the sub picture in clockwise direction 5 SWAP returns to the previously viewed programme 6 MENU selects a menu 7 D E Programme Up Down selects a programme or a menu item switches the set on from standby F G Volume Up Down adjusts the volume adjusts menu settings OK accepts your selection or displays the current mode 8 NUMBER BUTTONS switches the set on ...

Page 7: ...R SWAP and INPUT buttons are used for teletext function Battery installation The remote control handset is powered by two AAA type batteries To load the batteries turn the remote control handset over and open the battery compartment Install two batteries as indicated by the polarity symbols and marked inside the compartment Note To avoid damage from possible battery leakage remove the batteries if...

Page 8: ...s the set on from standby 7 OPERATION INDICATOR Refer to p 7 8 LAMP INDICATOR Refer to p 7 9 TEMPERATURE INDICATOR Refer to p 7 10 REMOTE CONTROL SENSOR Note There might be a faint white trace on the center of the screen according to the position This is normal and is a characteristic of the screen Front panel ON OFF ON OFF TV AV MENU OK VOL PR TV AV MENU OK VOL PR 2 3 4 5 6 7 8 9 1 10 Lamp indica...

Page 9: ... port is used to upgrade the software version and debug without changing the hardware Be careful not to use this port Just contact your dealer or service centre DTV DVD INPUT SOCKETS PC DTV INPUT SOCKETS CENTER SPEAKER MODE IN SOCKETS AV1 2 MONITOR OUT AUDIO VIDEO S VIDEO INPUT SOCKETS VARIABLE AUDIO OUT SOCKETS S VIDEO INPUT SOCKET AV3 INPUT SOCKET Off Power cord is not connected Red Power Cord i...

Page 10: ...only designated in B O M PARTS SPEC or drawings 5 Follow each drawing or spec for spec and performance of parts based upon P N of B O M 6 Warm up TV set for more than 30min before the measurement Specification PAL B G D K I M N SECAM B G D K NTSC M 4 43 1 VHF 1 9 UHF 20 75 CATV 1 44 AC 240V 50H 60Hz Australia 52 inch 16 9 wide 0 20 10 Remark RB Teletext RP W O Teletext option Model Name RT 52SZ30R...

Page 11: ...t RGB Audio L R Input Center Speaker Mode Input Component Audio R L Input Component Input AV Input S Video Input Monitor out Variable Audio out Serial Port Local key Picture EZ Video mode Picture User Control Display mode Sound EZ Sound mode Sound Stereo Dual PIP POP Mode SSC Split Screen Mode Teletext Timer OSD Language At Room Temperature At 10 C 1 2 3 4 5 6 7 8 Power ON OFF operation Staring Vo...

Page 12: ...B Video Input Level Audio Input S N Audio Input Distortion Audio Input Dynamic Range Audio Input Level Audio Input Frequencyl Response 0 85 3 40 0 85 0 256 0 6 0 6 40 2 0 47 0 05 1 1 0 286 0 7 0 7 0 63 1 15 1 15 0 316 0 8 0 8 2 0 79 10 Vpp MHz dB Vpp Vpp Vpp Vpp dB V Vrms kHz No Item Specification Min Typ Max Unit Remark F External Interface SDTV DVD 480I SDTV DVD 480I EDTV 480P SDTV DVD 576I EDRV...

Page 13: ...Mono 1 Ready to Over Modulation in DK Mono 0 BG I D 1 BG L 2 BG I DK M 0 west EU 1 East EU 1 2 East EU 2 3 Turkey EU 4 Cyrillic 1 5 Cyrillic 2 6 Cyrillic 3 7 Turk GRE 1 8 Turk GRE 2 9 Turk GRE 3 10 Arab FRA 11 Arab ENG 12 Arab HEB 1 13 Arab HEB 2 14 FARS ENG 15 FARS FRA 16 FARS All 1 2 3 4 5 6 7 Volume Curve Text Top I_II SVC Lamp_Type C_Mute system Text Language 0 0 0 0 0 2 0 No Item Specificatio...

Page 14: ...djustment When the LCD pannel load data on regular pixel using high speed charge discharge with sample holder the drain width of TFT gradually dicreases and the non resistance increases and comes out regular noise on screen shows vertical line by 12 pixel 1 Required Test Equipments 1 PC Pattern generator 16 Gray Pattern 2 Fixation stand 3 Remote control of adjustment 4 Circuit thing Jig for adjust...

Page 15: ...gure is change to green by clicking it 4 Select the program of operations 5 Check the Erase before programming and Verify menu as shown Fig4 and press the OK button f At this time the download starts The download finished after 10 seconds 6 Assembling Adjustment 6 1 Screen Tilt Keystone Adjustment 1 Required Test Equipments 1 Six angles wrench and spanner for knob adjustment or fixation 2 Remote c...

Page 16: ...ssively white Balance in Low Level adjustment limite Red Offset 2 step Blue Offset 4step 6 4 White Balance Gamma Adjustment 1 Required Test Equipments 1 CA100 1EA Measure colour of projecting screen center CA 110 name of model is possible to measure White Balance and Gamma leave it 20Cm from screen center Follow a measurement machine manual to set CA 100 and CA 110 measurement machine 2 pattern Ge...

Page 17: ...ipment as Fig 2 3 Preparation for Adjustment 1 Composite the equipment as shown Fig 2 and place the set on fixation stand 2 After inputting company channel 13 adjust colour uniformity like Horizontal Vertical position adjustment of input signal part adjustment by using remote control for adjustment 3 After pressing IN_START key on remote control for adjustment select the adjustment mode 7050 Unifo...

Page 18: ...t 28 BL3L Lower 9bit of MAX brightness correction coefficient in B MID1 Change according to BMID1 and BMAX value use it while adjusting 4 coefficient 29 RLMIN Setting up the MINIUM Level of R Set under 200 30 RLMID2 Setting up the MIDDLE 2nd Level of R Middle level when 3coefficient 31 RLMID1 Setting up the MIDDLE 1st Level of R Max level when 3coefficient 32 RLMAX Setting up the MAX Level of R 33...

Page 19: ...ith naked eyes in 06Ch pattern and if there is difference adjust like this The field and the letters are distinguished 4 Adjusting Main screen 1 Press the IN Start key on R C for adjustment to select VPC3230_Main 2 Adjust to Luma Contrast of adjustment item with Channel key initial value 32 5 Adjusting Sub screen 1 Press the IN Start key on R C for adjustment to select 2 VPC3230_Sub 2 Adjust to Li...

Page 20: ... Y C SDA5550 VPC3230 _M IC104 TXT_R G B TXT_Y Cb Cr ReaeyII D_Y Cb Cr D_Y Cb Cr CH_A CH B DTV_HS VS LPF_CTL2 H 30MHz L 6MHz AV3 V Y C Tuner Main Tuner Sub CXA2119 TXT_FB SC R G B SC R G B Component Board Tuner AV Digital Board Main Board CX2069 Switching LPF AD9883A ADC 16 3 3 3 3 5 1 Video Input Path BLOCK DIAGRAM ...

Page 21: ...HS VS DTV Component Board Tuner AV Digital Board Main Board 74HC4053 CTL A RGB_HS VS PC Comp RGB DTV HS VS S V Comp_Y XC95144XL CPLD AV HS S V Y TXT HS VS HS VS_VDP_S M V M Y HS VS_VDP_M HS VS_ADC FID_VDP_S FID_VDP_M H Comp RGB DTV L RGB PC 74VHC123 AV VS V_sync R C LPF 2 Syns I O Path ...

Page 22: ...2003 04 30 CXA2069 Tuner M Tuner AV MAIN MSP3411G LA4282 SIF L R1 L R3 L R2 L R TV L R COM2 L R COM1 L R PC Main L R L R out Main R Lout L R Var Component CTR Center IN KA4558D Audio Mute 3 Audio Input Path ...

Page 23: ...SCLK SDATA ATC24C16 IIC0 General Control Signal Control IIC1 Communication Btwn V3 and SDA550 IIC2 Communication Btwn V3 and M37272 IIC3 Key Board LED Control IICX Driver Control Driving Bias Generator Line Á Á ë SCLK SDATA PURPOSE OF IIC M62320 M62320 L S IIC3 3 3 IIC3 5 IIC3 5 Voltage Level In IICn M 2 5 2 5 V 5 5V 3 3 3 3V What is M L S IIC1 5 IIC1 3 3 Tuner AV COM PC Main Digital Driver Key IR...

Page 24: ... 24 5 General Control Signal ...

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

Page 26: ... 26 MAIN BOTTOM ...

Page 27: ... 27 COMPONENT TOP COMPONENT BOTTOM SIDE A V PRE AMP LED AC INPUT ...

Page 28: ... 28 LCD DRIVER TOP CONTROL ...

Page 29: ... 29 LCD DRIVER BOTTOM ...

Page 30: ... 30 DIGITAL BOTTOM DIGITAL BOTTOM ...

Page 31: ... 31 TUNER TOP TUNER BOTTOM ...

Page 32: ... 32 SMPS POWER S W INTERFACE BALLAST ...

Page 33: ...MEMO 33 ...

Page 34: ... 34 EXPLODED VIEW 430 690 410 420 120 121 300 310 640 650 630 303 590 307 304 302 305 301 306 123 308 620 670 621 610 611 600 612 124 125 520 550 560 503 502 530 122 174 540 501 680 570 580 401 660 ...

Page 35: ...03 4811V00021E BRACKET ASSEMBLY REAR AV RT 52SZ30RP NB03JA 520 6871VMMP50A PWB PCB ASSEMBLY MAIN AUS M I 530 6871VPMA14A PWB PCB ASSEMBLY POWER SMPS MB 03CA RT 52SZ30RP SMPS M I 540 6871VSMU54B PWB PCB ASSEMBLY SUB TUNER MB03CA M I 550 6871VSMU56A PWB PCB ASSEMBLY SUB DIGIT MB03CA M I 560 6871VSMU55A PWB PCB ASSEMBLY SUB SUB MB03CA AUS COMPONENT M I 570 6871VPMA15A PWB PCB ASSEMBLY POWER SMPS MB 0...

Page 36: ... DIODE SWITCHING KDS184S 85V 300MA KEC TP DIODE SWITCHING KDS184S 85V 300MA KEC TP DIODE SWITCHING KDS184S 85V 300MA KEC TP DIODE SWITCHING KDS184S 85V 300MA KEC TP LOCA NO PART NO DESCRIPTION IC01 IC02 IC1 IC101 IC102 IC103 IC104 IC105 IC1100 IC1100 IC1101 IC1102 IC1103 IC1104 IC1105 IC1106 IC1107 IC120 IC1200 IC1200 IC1202 IC1202 IC1203 IC1300 IC1301 IC1302 IC1303 IC1304 IC1305 IC1400 IC1401 IC1...

Page 37: ...ITCHING 1N4148 TP GRANDE DIODE RECTIFIERS FML G12S DIODE RECTIFIERS RK46 DO 214AC 60V 3 5A DIODE RECTIFIERS FML G12S DIODE RECTIFIERS FML G12S DIODE RECTIFIERS EG1ZV 1 TP SANKEN TP DIODE RECTIFIERS TO220 600V 6A 50A DIODE RECTIFIERS SD05 SOD323 5V 5A 15A DIODE TP ROHM K DO34 0 5W 6 2V 5UA DIODE TP ROHM K DO34 0 5W 6 2V 5UA DIODE RECTIFIERS SOD323 5V 5A 15A LOCA NO PART NO DESCRIPTION ZD12 ZD2 ZD3 ...

Page 38: ...Y SAMSUNG TP TO92 50V 150MA TR KTC3227 Y TP KTC1627A KEC TR KSC945C Y SAMSUNG TP TO92 50V 150MA 22UF MV 16V 20 R TP SMD SMD 47UF MV 16V 20 R TP SMD SMD LOCA NO PART NO DESCRIPTION C1 C1 C10 C101 C104 C105 C106 C107 C108 C11 C1100 C1101 C1102 C1103 C1104 C1105 C1106 C1107 C1108 C1110 C1111 C1112 C1114 C1116 C1118 C1122 C1125 C1133 C1134 C1138 C1139 C114 C1143 C119 C120 C1200 C1201 C1201 C1202 C1204...

Page 39: ... MV 25V 20 R TP SMD SMD 47UF MV 25V 20 R TP SMD SMD LOCA NO PART NO DESCRIPTION C1510 C1511 C1513 C1519 C1520 C1521 C1522 C1524 C1525 C1529 C1535 C1536 C1541 C158 C159 C1601 C1602 C1603 C1604 C1605 C1606 C1607 C1608 C1609 C1610 C1611 C1612 C1613 C1614 C1615 C1616 C1618 C1620 C1621 C1630 C1631 C168 C172 C173 C175 C183 C185 C186 C187 C187 C188 C190 C191 C192 C193 C194 C195 0CK103CK56A 0CK103CK56A 0C...

Page 40: ...TP SMD SMD 22UF MVG 16V M SMD R TP LOCA NO PART NO DESCRIPTION C314 C315 C316 C359 C362 C371 C372 C401 C402 C403 C403 C404 C405 C406 C406 C407 C408 C409 C410 C411 C411 C412 C412 C417 C426 C427 C428 C429 C430 C433 C434 C435 C436 C437 C450 C453 C456 C456 C456 C5 C505 C506 C507 C507 C508 C508 C509 C509 C510 C511 C512 C513 0CE226SF6DC 0CE107DF618 0CE106DF618 0CE106SF6DC 0CE226SF6DC 0CE336SC6DC 0CE226S...

Page 41: ... F TR 1000UF KME 16V M FL TP5 R 470PF 1KV 10 10 R TP TP5 LOCA NO PART NO DESCRIPTION 0CE228BH61A 0CE108BF618 181 091Q 0CE105CK636 0CE228BK650 0CE337DK618 0CE477BJ618 0CE227BH618 181 091Q 181 091Q 0CE476VF6DC 6613V00013D 6612VJH006B 6613V00010B 6612JH003FA 380 404A 6612VMH003A 6612VMH003A 6612VMH003A 6612BBBHN6A 6612VMH003A 6612VMH003A 6612BBBHN6A 0LCCE00018A 0LCCE00018A 0LCCE00018A 0LCCE00018A 0LC...

Page 42: ...H 10 3216 R TC FI C3216 103KJT INDUCTOR 10UH 10 3216 R TC FI C3216 103KJT INDUCTOR 10UH 10 3216 R TC FI C3216 103KJT COIL CHOKE 82UH PHY TURN COIL CHOKE 82UH PHY TURN TRANSFORMER 15 120UH LM2576 ND00GA LOCA NO PART NO DESCRIPTION L853 L861 L871 L881 L9 T1301 T1302 T1303 T1304 T1401 T1402 T1403 T1404 T1501 T1502 T1503 T1504 T801 T810 T830 JA1200 P001A P001B P001C P002A P003A P003B P003B P003C P005A...

Page 43: ... 5 R TP 4P E24 SERIES 22 OHM 1 16 W 1608 5 R TP 4P E24 SERIES 22 OHM 1 16 W 1608 5 R TP 4P E24 SERIES 22 OHM 1 16 W 1608 5 R TP 4P E24 SERIES 22 OHM 1 16 W 1608 5 R TP 4P E24 SERIES LOCA NO PART NO DESCRIPTION AR1209 AR1210 AR1211 AR1212 AR1213 AR1214 AR1215 AR1216 AR1217 AR301 AR302 AR303 AR304 AR305 AR306 D812 R1 R104 R106 R1253 R1606 R1609 R1615 R1616 R2 R3 R4 R402 R409 R425 R426 R5 R801 R801B ...

Page 44: ... 6200QJ3001A 6200QJ3001A 6200VJT006A 6200VJT006A 6200QJ3001A 6200QJ3001A 6200QJ3001A 6200QJ3001A 6200QJ3001A 6200QJ3001A 6200VJT006A 6200QJ3001A 6200QJ3001A 6200QJ3001A 156 A01L 6202VDT002E 6202VDT002E 6202VDT002D 156 A01B 156 A01E 6212AB2015D 156 A02M FILTER SQE3535 20MH PHY TURN FILTER TH355LSK K5218 KOREA TOKO BK 4FW TYPE FILTER TH355LSK K5218 KOREA TOKO BK 4FW TYPE FILTER TH355LSK K5218 KOREA ...

Page 45: ...UAL OWNERS MB03CA NEU LG AR EN FR REMOTE CONTROLLER NB03JA MONO FUSE SLOW BLOW 5000MA 250 V 5 2X20 CY GL TRANSFORMER IRON 15 120UH LM2576 ND00GA THERMISTOR KL15L2R5 SSANSHIN 15 125V THERMISTOR KL15L2R5 SSANSHIN 15 125V REMOTE CONTROLLER RECEIVER 38KHZ RELAY DG12D1 12 44 TUNER TAUD Z240D LG MULTI FS 4SYS 2IN1 MAIN TUNER TAFD Z241P LG MULTI FS 4SYS 2 IN 1 SUB VARISTOR SVC621D 14A ILJIN 620V 0 OSCILL...

Page 46: ...P No 3854VA0117A S1 1 2 2003 6 21 ...

Page 47: ...P No 3854VA0117A S1 2 2 2003 6 21 ...

Page 48: ...P No 3854VA0117A S2 1 2 2003 6 21 ...

Page 49: ...P No 3854VA0117A S2 2 2 2003 6 21 ...

Page 50: ...SVC SHEET 3854V A0117A S1 SVC SHEET 3854V A0117A S2 SVC SHEET ...