LG RT-44/48/52SZ50LP Service Manual
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LG RT-44/48/52SZ50LP Service Manual

LG RT-44/48/52SZ50LP Service Manual

Lcd projection tv
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LCD Projection TV

SERVICE MANUAL
CHASSIS : MB-03CA
MODEL : RT-44/48/52SZ50LP
CAUTION
BEFORE SERVICING THE CHASSIS,
READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
website:http://biz.LGservice.com
e-mail:http://www.LGEservice.com/techsup.html

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Summary of Contents for LG RT-44/48/52SZ50LP

  • Page 1: Lcd Projection Tv

    LCD Projection TV SERVICE MANUAL CHASSIS : MB-03CA MODEL : RT-44/48/52SZ50LP CAUTION BEFORE SERVICING THE CHASSIS, READ THE SAFETY PRECAUTIONS IN THIS MANUAL.

  • Page 2: Table Of Contents

    CONTENTS CONTENTS ........................2 SAFETY 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 ........................- 2 -...

  • Page 3: Safety Precautions

    SAFETY PRECAUTIONS IMPORT ANT SAFETY NOTICE Many electrical and mechanical parts in this chassis have special safety-related characteristics. These parts are identified by the Schematic Diagram and Replacement Parts List. 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.

  • Page 4: Servicing Precautions

    SERVICING PRECAUTIONS CAUTION: Before servicing receivers covered by this service transistors and semicounductor "chip" components. The manual and its supplements and addenda, read and follow the following techniques should be used to help reduce the SAFETY PRECAUTIONS on page 3 of this publication. incidence of component damage caused by static by static NOTE: If unforeseen circumstances create conflict between the electricity.
  • Page 5 c. Qulckly move the soldering iron tip to the junction of the Fuse and Conventional Resistor component lead and the printed circuit foil, and hold it Removal/Replacement there only until the solder flows onto and around both the 1. Clip each fuse or resistor lead at top of the circuit board component lead and the foil.

  • Page 6: Control Descriptions

    PLAY 9. PSM (Picture Status Memory) recalls your preferred picture setting. 10. SLEEP sets the sleep timer. 11. VCR BUTTONS control a LG video cassette recorder. - 6 -...
  • Page 7 12. TV/AV selects the remote operating mode. switches the set on from standby. 13. ARC (Aspect Ratio Control) changes the picture format. POWER 14. PIP BUTTONS MULTIMEDIA TV/AV switches the sub picture on or off. PR +/- LIST selects a program for the sub picture. SWAP MUTE alternates between main and sub picture.

  • Page 8: Front Panel

    Front panel Lamp indicator, operation indicator, and temperature indicator, located below the front panel con- trols reveal the operating status of the set. TV/AV MENU 7 8 9 1. MAIN POWER (ON/OFF) 7. OPERATION INDICATOR (Refer to p.7) switches the set on or off. 8.

  • Page 9: Rear Panel

    Rear panel AUDIO AV3 INPUT SOCKET (L)/ MONO VIDEO S-VIDEO S-VIDEO INPUT ANT IN 75Ω PC/DTV INPUT COMPONENT COMPONENT INPUT 1 INPUT 2 SOCKET 576i/480i 576i/480i (XGA/ 576p/480p 576p/480p 576p/ 720p/ 720p/ 480p/ 1080i 1080i 720p/ 1080i) S-VIDEO AUDIO A/V 1 A/V 2 MONITOR INPUT...

  • Page 10: Specifications

    Scope This specification can be applied to the LCD Projection(RT-44SZ50LP/ RT-48SZ50LP/ RT-52SZ50LP) Test and Inspection Method 1) performance:Follow the Standard of LG TV test 2) Standards of Extra requirement Safety: Follow the standard of CB EMC : Follow the standard of CE Test Condition 1) Temperature :25¡...
  • Page 11 Feature and Function Specification Item Remark Unit REMOCON LG Code RGB Input Separate D-Sub 15 Pin RGB Audio (L, R) Input Center Speaker Mode Input Component Audio (R, L) Input Component Input Y, P AV Input (1 Side / 2Rear)
  • Page 12 Specification Item Remark Unit DC Voltage, Digital, 5V 4.875 5.125 DC Voltage, Tuning voltage DC Voltage, LCD Driver, 5V DC Voltage, LCD Driver, 17.5V 17.5 DC Voltage 3.3, SUB MICOM 3.15 3.45 DC Voltage 2.5V, SUB MICOM 2.438 2.600 DC Voltage, FAN 11.5 12.5 External Interface...
  • Page 13 Option Specification Remark Item Unit 0 : Standard Volume Curve 1 : Non-Standard (Southeast Asia,Central America) 0 : Support FLOP Text Top 1 : Support All (FLOP + TOP) 0 : Do not save DUAL When converting Channel I_II SVC 1 : Save DUAL when Converting Channel 0 : OSRAM Lamp_Type...

  • Page 14: Adjustment Instructions

    ADJUSTMENT INSTRUCTIONS 1. Application Object 4. LCD adjustment This instruction is for the application to the LCD Projection 4-1. NRS adjustment [When the LCD pannel load data on regular pixel using high 2. Notes speed charge/ discharge with sample & holder, the drain width (1) The power source insulation of this LCD Projection is not of TFT gradually dicreases and the non-resistance increases, charging type and you may not use the transformer for...
  • Page 15 Optical measuring equipment Adjustment Connector for RS-232C Adjustment Cable PC Pattern Generator <Fig 2.TV set status Adjustment> (3)Preparation for Adjustment 1) Connect the PC PATTERN GENERATOR, circuit for adjustment and adjustment JIG as shown <Fig 2>. 2) Adjust output pattern of PC PATTERN GENERATOR to possible display and then turn on the power.
  • Page 16 (3) Offset Adjustment 8. H/V Position Adjustment 1) Press Adjust key on the remote control to enter the adjustment mode after more than 10 seconds of receiving (1) Required Test Equipments the signals. A remote control of adjustment 2) Press “4.AD9883 Adjust” to adjust. 3) When the OSD of “AD9883 Adjust End”...
  • Page 17 1) Select the VDP Test Pattern signal to R1, G1, B1. (3) Preparation for Adjustment 1) Composite the equipment as shown Fig.2, and place the 2) Press the Adjust key to select 62352 and then select RVREF, GVREF, BVREF in adjust mode set on fixation stand.
  • Page 18 14. RL2L : Lower 9bit of MID1 brightness correction 27. BL3H : Upper 9bit of MAX brightness correction coefficient coefficient in R MID2. in B MID1. --- Change according to RMID2 and RMID1 value. --- Change according to BMID1 and BMAX value. (use it while adjusting 4 coefficient) 15.
  • Page 19 4) Output the VDP TEST PATTERN signal correspond to the MIN value. Read the white coordinate and communicate with ET7050 IC through measurement equipment of optics. Adjust screen coordinates data to adjust the color uniformity of miner point. At this time, make sure that deviation is +5~-5% and standard is color coordinate of center.

  • Page 20: Block Diagram

    BLOCK DIAGRAM 1. Video Input Path - 20 -...
  • Page 21 2. Syns I/O Path - 21 -...
  • Page 22 3. Audio Input Path - 22 -...
  • Page 23 4. Control Signal Connection Diagram- IIC - 23 -...
  • Page 24 5. General Control Signal - 24 -...
  • Page 25 MEMO - 25 -...

  • Page 26: Exploded View

    EXPLODED VIEW(44”) - 26 -...

  • Page 27: Exploded View Parts List

    EXPLODED VIEW PARTS LIST Part No. Description 6400VA0035D SPEAKER,FULLRANGE F3050C-6168-3 K-TONE MID-RANGE 8OHM 15/25W 87DB 120 VER TMN EVA 6400VG0002C SPEAKER,TWEETER F20T-6172 K-TONE TWEETER(DOME) 8OHM 10/20W 88DB 50 2.2UF 6411VCH001F POWER CORD ASSEMBLY,A001P201 CHAUS NON 2110MM HOUSING BLACK L1=500 LGESY LOCAL 3091V00511A CABINET ASSEMBLY,RN-44SZ50H STEREO NB03JA MIDDLE 3211V00134E...
  • Page 28 EXPLODED VIEW(48”) - 28 -...
  • Page 29 SHIELD, RT-48SZ50LP MB03CB SECC(EGI) CKD 4814V00384F SHIELD, RT-48SZ50LP MB03CA SECC(EGI) CKD 6871VSME02A PWB(PCB) ASSEMBLY,SUB INTER NB03JA RN-48SZ40H 5900V11001D FAN,DC B1232S12B2-LG DONGYANG 120*120*30 12V 950+-10 RPM 8-14V 300MM 4810V00717C BRACKET,NON RT-48SZ50LP MB03CB ABS, AF-303S CKD 4850V00012M CUSHION,FILTER 109*109*2 POLYURETHAN RN-48SZ40 3550V00281B...
  • Page 30 EXPLODED VIEW(52”) - 30 -...
  • Page 31 EXPLODED VIEW PARTS LIST Part No. Description 6400WESC01A SPEAKER,WOOFER C080P23K1450 ESTEC WOOFER 8OHM 15/25W 84DB 80 NON 6400DESA01A SPEAKER,TWEETER D016D01K1450 ESTEC TWEETER(DOME) 8HMOHM 15/25W 85DB 50 NON 6411VCH001F POWER CORD ASSEMBLY A001P201 CHAUS NON 2110MM HOUSING BLACK L1=500 3091V00520C CABINET ASSEMBLY,RT-52SZ50LP NON MB03CA SKD,XCANVAS 3211V00140C FRAME ASSEMBLY,FRAME RT-52SZ50LP CHINA(SKD) 4811V00054C...

  • Page 32: Replacement Parts List

    0TR387500AA CHIP 2SC3875S(ALY) KEC 0ISG272012A M27W201(2M BIT 3.3V) 32PLCC TP OTP Q1001 0TR387500AA CHIP 2SC3875S(ALY) KEC IC301 0ICTMLG003C LGDT1502M LG IC 304P QFP Q1002 0TR387500AA CHIP 2SC3875S(ALY) KEC IC302 0ITI740000Q SN74LVC00AD 14SOP R/TP LOGIC D-TV 0TR387500AA Q1003 CHIP 2SC3875S(ALY) KEC...
  • Page 33 LOCA. NO PART NO DESCRIPTION LOCA. NO PART NO DESCRIPTION Q101 0TR387500AA CHIP 2SC3875S(ALY) KEC Q206 0TR150400BA CHIP 2SA1504S(ASY) KEC Q102 0TR387500AA CHIP 2SC3875S(ALY) KEC Q207 0TR150400BA CHIP 2SA1504S(ASY) KEC 0TR387500AA 0TR150400BA Q102 CHIP 2SC3875S(ALY) KEC Q208 CHIP 2SA1504S(ASY) KEC Q103 0TR387500AA CHIP 2SC3875S(ALY) KEC...
  • Page 34 For Capacitor & Resistors, CC, CX, CK, CN : Ceramic RD : Carbon Film the charactors at 2nd and 3rd CQ : Polyestor RS : Metal Oxide Film digit in the P/No. means as CE : Electrolytic RN : Metal Film follows;...
  • Page 35 For Capacitor & Resistors, CC, CX, CK, CN : Ceramic RD : Carbon Film the charactors at 2nd and 3rd CQ : Polyestor RS : Metal Oxide Film digit in the P/No. means as CE : Electrolytic RN : Metal Film follows;...
  • Page 36 For Capacitor & Resistors, CC, CX, CK, CN : Ceramic RD : Carbon Film the charactors at 2nd and 3rd CQ : Polyestor RS : Metal Oxide Film digit in the P/No. means as CE : Electrolytic RN : Metal Film follows;...
  • Page 37 For Capacitor & Resistors, CC, CX, CK, CN : Ceramic RD : Carbon Film the charactors at 2nd and 3rd CQ : Polyestor RS : Metal Oxide Film digit in the P/No. means as CE : Electrolytic RN : Metal Film follows;...
  • Page 38 LOCA. NO PART NO DESCRIPTION LOCA. NO PART NO DESCRIPTION L871 150-C02F COIL,CHOKE82UH PHY TURN AR301 0RRZVTA001D 22 OHM 1 / 16 W 1608 5% R/TP 4P E24 L881 150-C02F COIL,CHOKE82UH PHY TURN AR302 0RRZVTA001D 22 OHM 1 / 16 W 1608 5% R/TP 4P E24 0LC1032101A 0RRZVTA001D INDUCTOR,10UH 10% 3216 R/TC FI-C3216-103KJT...
  • Page 39 HD-1M2012-301J 100MHZ 300OHM SW01 140-275E SPBS222EP011 POSTEC NON DC50V 0.3A T1401 0LCCE00017A HD-1M2012-301J 100MHZ 300OHM SW01 140-313B TACT 2LEAD 160G(TA) LG C&D NON T1402 0LCCE00017A HD-1M2012-301J 100MHZ 300OHM SW02 140-313B TACT 2LEAD 160G(TA) LG C&D NON T1403 0LCCE00017A HD-1M2012-301J 100MHZ 300OHM...
  • Page 40 P402B 6612VMH003A 36510-0032 MOLEX 48PIN PITCH2.54MM P403 6612BBBHN6A 440062-1 AMP DVI INTERACED RIGHT ANGLE ACCESSORIES 3828VA0453B MANUAL,OWNERS SY LG CH 100E TX 012E 6710V00100X REMOTE CONTROLLER,MB03CA TXT MISCELLANEOUS F800 0FS5001B51D FUSE,SLOW BLOW 5000MA 250 V 5.2X20 6620VF3201A SOCKET(CIRC),IC 822473-3 AMP 32PIN 2.54MM...
  • Page 45 PRINTED CIRCUIT BOARD MAIN(TOP) MAIN(BOTTOM) DIGITAL(TOP) DIGITAL(BOTTOM) COMPONENT(TOP) COMPONENT(BOTTOM) SMPS DRIVER(TOP) TUNER(TOP) TUNER(BOTTOM) DRIVER(BOTTOM) SIDE A/V AC-INPUT...
  • Page 46 RT-44/52SZ50LP RT-48SZ50LP CONTROL(TOP) INDEX(TOP) CONTROL(BOTTOM) INDEX(BOTTOM) LED(TOP) LED(TOP) LED(BOTTOM) LED(BOTTOM) SIDE AV CASE SW BALLAST SIDE AV BALLAST POWER S/W PRE-AMP CASE SW POWER S/W PRE-AMP...
  • Page 47 Nov.,2003 P/NO : 3828VD0167B Printed in Korea...

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