LG RT-48SZ40RB Service Manual Download

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TV/AV MENU OK

VOL

DOLBY

VIR

VIRTUAL

TUAL

LCD Projection TV

SERVICE MANUAL

CAUTION

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

CHASSIS : MB-03CA

MODEL : RT-48SZ40RB

website:http://biz.LGservice.com

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

Feb.,2004

Printed in Korea

P/NO : 3828VD0167D

Summary of Contents for RT-48SZ40RB

Page 1: ...R VIRTUAL TUAL LCD Projection TV SERVICE MANUAL CAUTION BEFORE SERVICING THE CHASSIS READ THE SAFETY PRECAUTIONS IN THIS MANUAL CHASSIS MB 03CA MODEL RT 48SZ40RB website http biz LGservice com e mail http www LGEservice com techsup html ...

Page 2: ...Y PRECAUTIONS 3 SERVICING PRECAUTIONS 4 CONTROL DESCRIPTIONS 6 SPECIFICATIONS 10 ADJUSTMENT INSTRUCTIONS 14 BLOCK DIAGRAM 19 PRINTED CIRCIUT BOARD 23 EXPLODED VIEW 34 EXPLODED VIEW PARTS LIST 35 REPLACEMENT PARTS LIST 36 SVC SHEET ...

Page 3: ...tc 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 ohm meter to the AC plug prongs tied together and touch other ohm meter lead in turn to each exposed metalli...

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: ...ponent 1 2 or RGB DTV RGB PC modes 5 NUMBER BUTTONS switches the set on from standby or directly select a number 6 SLEEP sets the sleep timer 7 VOL Volume Up Down Increases decreases sound level PR Programme Up Down selects a programme 8 PSM Picture Status Memory recalls your preferred picture setting 9 PIP BUTTONS option PIP DW switches the sub picture on or off selects PIP POP or DW modes PIP PR...

Page 7: ...ntrol changes the picture format 17 Q VIEW returns to the previously viewed programme 18 SSM Sound Status Memory recalls your preferred sound setting 19 TELETEXT BUTTONS option These buttons are used for teletext For further details see the Teletext section 20 EXIT Clears all on screen displays and returns to TV viewing from any menu 21 I II selects the language during dual language broadcast sele...

Page 8: ...me adjusts menu settings 10 D D E E Programme Up Down selects a programme or a menu item switches the set on from standby 11 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 TV AV MENU OK VOL PR TV AV MENU OK VOL PR DOLBY DOLBY VIR VIRTUAL TUAL DOLBY DOLBY VIR VIRTUAL...

Page 9: ...DEO VIDEO SIDE A V L R MONO AUDIO INPUT Rear panel AERIAL SOCKET UPGRADE PORT This 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 RGB INPUT SOCKETS S VIDEO INPUT SOCKET AV3 INPUT SOCKET VARIABLE AUDIO OUT SOCKETS EXTERNAL SPEAKER OUTPUT 8 ohm Connect to optional ex...

Page 10: ...ed by model 4 Use the parts 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 L L PAL SECAM NTSC 3 58 4 43 VHF E2 E12 UHF E212 E69 CATV S1 S20 HYPER S21 S41 L L VHF B C D Option AC 230V 50HHz EU 48 inch 16 9 ...

Page 11: ... Pin Scart1 Out Scart2 Out External out Item Specification Remark REMOCON RGB Input RGB Audio L R Input Component Audio R L Input Component Input AV Input TV out Monitor out Serial Port Speak Out 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 Index At Room Temperature At 10 C 1 2...

Page 12: ... G 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 a1 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 V External Interface SDTV DVD 480I SDTV DVD 480I EDTV 480P SDTV DVD 576I ...

Page 13: ...en Converting Channel 0 OSRAM 1 PHILIPS 0 Not Ready to Over Modulation in DK Mono 1 Ready to Over Modulation in DK Mono BG i DK LL 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 0 1 0 1 0 2 0 No Item Specification Min Typ...

Page 14: ...r the drain width of TFT gradually decreases 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 for adjustment 4 Circuit thing Jig for adjustment Except Driver Board Assy 2 Equipment composition Refer to Fig 2 3 Preparation for Adjustment 1 Connect...

Page 15: ... Position Adjustment 1 Required Test Equipments A remote control of adjustment 2 Preparation for Adjustment 1 Turn TVset on and press EYE key on the remote control 2 11th screen Select the pattern that has 11th white small square diagonal and the red big square 3 Adjustment Sequence Adjust data with using the up down left right key on the remote control 7 Screen position adjustment 1 Required Test...

Page 16: ...Adjustment Compose the equipment follow Fig 2 and place the set on the fixation stand 1 Select the VDP Test Pattern signal to R1 G1 B1 2 Press the Adjust key to select 62352 and then select RVREF GVREF BVREF in adjust mode 3 Adjust the luminance of CA100 to be below 0 75Cd by volume key Range 196 202 4 Exit adjustment mode by pressing Adjust key 5 Press the IN START key on the remote control and s...

Page 17: ...t in R MIN Change according to RMIN and RMID2 value 12 RL1L Lower 9bit of MID2 brightness correction coefficient in R MIN Change according to RMIN and RMID2 value 13 RL2H Upper 9bit of MID1 brightness correction coefficient in R MID2 Change according to RMID2 and RMID1 value 14 RL2L Lower 9bit of MID1 brightness correction coefficient in R MID2 Change according to RMID2 and RMID1 value 15 RL3H Upp...

Page 18: ...e with ET7050 IC through measurement equipment of optics Adjust screen coordinates data to adjust the color uniformity of max point At this time make sure that deviation is 5 5 and standard is color coordinate of center 3 Output the VDP TEST PATTERN signal correspond to the MID value Read the white coordinates and communicate 3 line with ET7050 IC through measurement equipment of optics Adjust scr...

Page 19: ... 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 20: ...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 21: ...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 22: ...K 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 for adjustment 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 ...

Page 23: ... 23 PRINTED CIRCUIT BOARD MAIN TOP ...

Page 24: ... 24 MAIN BOTTOM ...

Page 25: ... 25 DIGITAL TOP DIGITAL BOTTOM ...

Page 26: ... 26 COMPONENT TOP COMPONENT BOTTOM ...

Page 27: ... 27 TUNER ...

Page 28: ... 28 TUNER BOTTOM ...

Page 29: ... 29 SMPS AC INPUT ...

Page 30: ... 30 DRIVER TOP CONTROL TOP ...

Page 31: ... 31 DRIVER BOTTOM CONTROL BOTTOM ...

Page 32: ... 32 SIDE A V BALLAST SPEAKER PRE AMP POWER S W CASE S W ...

Page 33: ... 33 MEMO ...

Page 34: ...4 EXPLODED VIEW 430 400 410 401 300 610 330 304 590 174 630 306 305 301 302 520 550 501 530 540 600 201 200 202 211 213 214 560 219 640 217 570 212 216 218 620 600 403 580 402 420 210 220 215 503 650 660 ...

Page 35: ... 1 KEY SET 400 3809V00324E BACK COVER ASSEMBLY RZ 48SZ40RB NON UPPER 402 3550V00278C COVER LAMP RZ 48SZ40RB ABS AF 303S SIDE 403 3110V00257A CASE NON RN48SZ40H PC ABS LAMP DUCT 410 3809V00325F BACK COVER ASSEMBLY RT 48SZ40RB NON LOWER 420 3550V00277A COVER MIDDLE RN 48SZ40 ABS AF 303S DUST 430 5018V00054A MIRROR LCD SSC SAMSUNG CORNING NON LCD48 MIRROR 501 3210V00165B FRAME ABS AF 303S RN 48SZ40H ...

Page 36: ...Y KEC LOCA NO PART NO DESCRIPTION IC01 IC02 IC1 IC101 IC102 IC103 IC104 IC105 IC1101 IC1102 IC1103 IC1104 IC1105 IC1106 IC1107 IC120 IC1200 IC1200 IC1202 IC1202 IC1203 IC1300 IC1301 IC1302 IC1303 IC1304 IC1305 IC1400 IC1401 IC1402 IC1403 IC1404 IC1405 IC1500 IC1501 IC1502 IC1503 IC1504 IC1505 IC1601 IC1602 IC1603 IC208 IC301 IC302 IC303 IC304 IC305 IC306 IC320 IC4 0IMI623200B 0IMI623200B 0ISM55500...

Page 37: ...CHIP 2SA1504S ASY KEC CHIP 2SA1504S ASY KEC CHIP 2SA1504S ASY KEC CHIP 2SA1504S ASY KEC LOCA NO PART NO DESCRIPTION Q207 Q208 Q209 Q210 Q213 Q3 Q301 Q302 Q304 Q400 Q501 Q510 Q511 Q601 Q602 Q810 Q841 Q842 Q851 D01 D02 D03 D1 D100 D1001 D101 D102 D1200 D1202 D1602 D1603 D1605 D2 D200 D201 D3 D300 D4 D400 D400 D401 D402 D402 D403 D403 D404 D404 D404 D405 D405 0TR150400BA 0TR150400BA 0TR150400BA 0TR15...

Page 38: ... R TP SMD SMD 47UF STD 16V M FL TP5 47UF MV 16V 20 R TP SMD SMD 47UF MV 16V 20 R TP SMD SMD 2200PF 4KV M E FMTW LEAD 4 5 LOCA NO PART NO DESCRIPTION C1001 C101 C104 C105 C106 C107 C108 C11 C1100 C1101 C1102 C1102 C1103 C1103 C1104 C1105 C1106 C1107 C1108 C1110 C1111 C1112 C1114 C1116 C1118 C1122 C1125 C1133 C1134 C1138 C1139 C114 C1143 C119 C120 C1200 C1201 C1202 C1204 C1205 C1206 C1207 C1208 C120...

Page 39: ...25V 20 R TP SMD SMD 0 01UF 1608 50V 10 R TP X7R LOCA NO PART NO DESCRIPTION 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 C1624 C1626 C1627 C1629 C1630 C1631 C168 C172 C173 C175 C183 C185 C186 C187 C188 C190 C191 C192 C193 0CK103CK56A 0CK103CK56A 0CE...

Page 40: ...D SMD 22UF MVG 16V M SMD R TP LOCA NO PART NO DESCRIPTION C314 C315 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 C507 C508 C509 C510 C515 C6 C606 C607 C608 C609 C610 C611 C612 0CE226SF6DC 0CE107DF618 0CE106SF6DC 0CE226SF6DC 0CE336SC6DC 0CE226SF6DC 0CE107VF6DC 0C...

Page 41: ...FL TP 5 220UF KME 25V M FL TP5 R 470PF 1KV 10 10 R TP TP5 R 470PF 1KV 10 10 R TP TP5 47UF MV 16V 20 R TP SMD SMD LOCA NO PART NO DESCRIPTION 0LA0102K119 6140VB0003A 6140VB0003A 6140VB0003A 6140VB0003A 6140VB0003A 6140VB0003A 6140VB0003A 6140VB0003A 0LA0102K119 150 C02F 150 C02F 6170VZ0005A 150 C02F 150 C02F 150 C02F 150 C02F 6170VMCA03D 6170VMCA37B 6170VS0001B 6630VGA001B 6932V25004A 6932V25004A 6...

Page 42: ...A52 330K OHM 1 4 W 1 00 TA52 330 OHM 1 6 W 5 00 TA52 390K OHM 1 4 W 1 TA52 390K OHM 1 4 W 1 TA52 8 2K OHM 1 2 W 5 00 TA52 30 OHM 1 6 W 5 00 TA52 RW ROUND G 2W 0 11 K TA31 63 LOCA NO PART NO DESCRIPTION R812 R813 R814 R815 R816 R817 R818 R819 R820 R821 R822 R823 R824 R825 R826 R827 R829 R831 R833 R834 R835 R840 R841 R842 R843 R844 R845 R851 R852 R853 R854 R855 R857 R871 R90 SW01 SW01 SW02 SW03 SW04...

Page 43: ...TER EMI REEL TAPING BMS400 25V 200MA STC222D NIIGATA 50VOLT 4A 2200PF LOCA NO PART NO DESCRIPTION T402 T402 T403 T403 T406 T407 T408 T409 T410 T411 T414 T415 T416 T417 T418 T419 T420 T421 T422 T423 T424 T425 T426 T427 T428 T430 T431 T432 T438 T440 T444 T445 T446 X1 X101 X102 X1100 X1201 X1202 X401 X601 J1000 JA1201 JA1202 JA201 JA202 JA204 P101B P102B P103B 6200QJ3001A 6200VJT006A 6200QJ3001A 6200...

Page 44: ...54MM 36510 0032 MOLEX 48PIN PITCH2 54MM 440062 1 AMP DVI INTERACED RIGHT ANGLE MANUAL OWNERS MB03CA AP 116T TX 395A REMOTE CONTROLLER MB03CA RT 48SZ40RB CABLE COAXIAL UL1365 2 5C 2V 100M M FUSE SLOW BLOW 5000MA 250 V 5 2X20 SOCKET CIRC IC 822473 3 AMP 32PIN 2 54MM THERMISTOR NTC KL15L2R5 15 125V THERMISTOR NTC KL15L2R5 15 125V REMOTE CONTROLLER RECEIVER TSOP1238RF1 TUNER TAUD Z240D MULTI FS 4SYS 2...

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Page 50: ...COMPONENT BOTTOM DIGITAL BOTTOM PRINTED CIRCUIT BOARD MAIN TOP MAIN BOTTOM DIGITAL TOP COMPONENT TOP TUNER TOP TUNER BOTTOM DRIVER TOP DRIVER BOTTOM SMPS SIDE A V AC INPUT ...

Page 51: ...PRE AMP POWER S W CONTROL TOP CONTROL BOTTOM LED TOP LED BOTTOM SIDE AV CASE SW BALLAST PRE AMP POWER S W INDEX TOP INDEX BOTTOM LED TOP LED BOTTOM SIDE AV CASE SW BALLAST RT 44 52SZ50LP RT 48SZ50LP ...

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