LG RT-48SZ40RB Service Manual
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LG RT-48SZ40RB Service Manual

Lcd projection tv chassis : mb-03ca
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LCD Projection TV

SERVICE MANUAL
CHASSIS : MB-03CA
MODEL : RT-48SZ40RB
CAUTION
BEFORE SERVICING THE CHASSIS,
READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
DOLBY
DOLBY
VIRTUAL
VIR
TUAL
e-mail:http://www.LGEservice.com/techsup.html
TV/AV
MENU
OK
VOL
PR
website:http://biz.LGservice.com

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Summary of Contents for LG RT-48SZ40RB

  • Page 1: Lcd Projection Tv

    LCD Projection TV SERVICE MANUAL CHASSIS : MB-03CA MODEL : RT-48SZ40RB CAUTION BEFORE SERVICING THE CHASSIS, READ THE SAFETY PRECAUTIONS IN THIS MANUAL. DOLBY DOLBY VIRTUAL TUAL TV/AV MENU...

  • Page 2: Table Of Contents

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

    Before you use the remote control handset, please install the bat- CABLE teries. See the next page. AUDIO Displays the selected device 2. MODE MODE selects a LG TV, VCR or DVD function. 3. TV/AV selects the remote operating mode. switches the set on from standby. 4. MULTIMEDIA selects modes.
  • Page 7 14. POWER switches the set on from standby or off to standby. 15. MUTE switches the sound on or off. CABLE 16. ARC (Aspect Ratio Control) AUDIO changes the picture format. MODE Q.VIEW returns to the previously viewed programme. 18. SSM (Sound Status Memory) recalls your preferred sound setting.

  • 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 LCD projection TV. DOLBY DOLBY VIRTUAL TUAL TV/AV MENU DOLBY DOLBY VIRTUAL TUAL TV/AV MENU 3 4 5 1.

  • Page 9: Rear Panel

    Rear panel S-VIDEO AV 3 INPUT INPUT SOCKET S-VIDEO VIDEO AV3 INPUT SOCKET (L)/ AUDIO MONO AV 3 INPUT S-VIDEO VIDEO AUDIO MONO (L)/ ANT IN L ANT IN SIDE A/V 75‰ 75‰ PC/DTV INPUT COMPONENT COMPONENT INPUT 1 INPUT 2 (XGA/ 576i/480i 576p/480p...

  • Page 10: Specifications

    SPECIFICATIONS NOTE : Specifications and others are subject to change without notice for improvement. Scope This specification can be applied to the LCD Projection(RT-48SZ40RB) Test and Inspection Method 1) performance:Follow the Standard of LG TV test 2) Standards of Etc requirement...
  • Page 11 Feature and Function Specification Remark Item Unit REMOCON LG Code RGB Input Separate D-Sub 15 Pin RGB Audio (L, R) Input Component Audio (R, L) Input Y, P Component Input AV Input Bottom : Full Scart (AV1) Half Scart 9AV2/S-video2)
  • Page 12 Specification Item Remark Unit DC Voltage, Digital, 5V 4.875 5.125 DC Voltage, Turning 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 panel 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 decreases and the non-resistance increases, charging type and you may not use the transformer for...

  • Page 15: Screen Position Adjustment

    Optical measuring equipment Adjustment Connector for RS-232C Adjustment Cable PC Pattern Generator <Fig 2.TV set status Adjustment> (4) Adjustment Sequence 1) Turn on the adjustment Jig 2) Select RGB_PC by pressing input Select Key on Remote control. <Fig 4. Program Options> 3) Enter to adjustment mode by pressing Adjust key on Remote control.
  • Page 16 Follow a measurement machine manual to set CA-100and CA-110 measurement machine.] 2) pattern Generator : 1EA -> 16 step Gray Pattern, 64 step Gray Pattern 3) SET Fixation Stand : 1EA 4) Remote control : 1EA 5) Circuit thing Jig for adjustment (Except Drive Board Assy of adjustment model) --- Programmed Digital Board so that the VDP Test Pattern can output white signal by 1 level from 0 to 255 level.
  • Page 17 V coefficient = 1/(number of pixel intervals between setting in the vertical 10. White Uniformity Adjustment direction) (1) Required Test Equipments Vcoeff = 1/((720/12)-1) = 0.016949152 1) Uniformity measuring equipment : Equipment which can hex (0.016949152 x 2 ) = 0 x 0456, Vcoeff (hex) = 0 x 0456 + 1 = 0 x 0457 measure chromaticity in the whole screen 2) Set stand : 1EA 11.
  • Page 18 Adjust screen coordinates data to adjust the color in G MID1. --- Change according to GMID1 and GMAX value. uniformity of max point. (use it while adjusting 4 coefficient) At this time, make sure that deviation is +5~-5% and standard is color coordinate of center. 23.

  • Page 19: Block Diagram

    BLOCK DIAGRAM 1. Video Input Path - 19 -...
  • Page 20 2. Syns I/O Path - 20 -...
  • Page 21 3. Audio Input Path - 21 -...
  • Page 22 4. Control Signal Connection Diagram- IIC - 22 -...

  • Page 23: Printed Circiut Board

    PRINTED CIRCUIT BOARD MAIN (TOP) - 23 -...
  • Page 24 MAIN (BOTTOM) - 24 -...
  • Page 25 DIGITAL(TOP) DIGITAL(BOTTOM) - 25 -...
  • Page 26 COMPONENT(TOP) COMPONENT(BOTTOM)) - 26 -...
  • Page 27 TUNER - 27 -...
  • Page 28 TUNER(BOTTOM) - 28 -...
  • Page 29 SMPS AC INPUT - 29 -...
  • Page 30 DRIVER(TOP) CONTROL(TOP) - 30 -...
  • Page 31 DRIVER(BOTTOM) CONTROL(BOTTOM) - 31 -...
  • Page 32 SIDE A/V POWER S/W PRE-AMP BALLAST CASE S/W SPEAKER - 32 -...
  • Page 33 MEMO - 33 -...

  • Page 34: Exploded View

    EXPLODED VIEW - 34 -...

  • Page 35: Exploded View Parts List

    SUPPORTER, NON AL LAMP COVER RN-48SZ40H 3680V00067A LENS, RICOH OPTICAL ENGINE RN-48SZ40 . 5900V11001D FAN,DC, B1232S12B2-LG DONGYANG 120*120*30 12V 950+-10 RPM 8-14V 300MM 5900V09005A FAN,DC G9225S12B2-RG DONGYANG 92*92*25 12V/140MA 1650+-10 RPM 8-14V 600MM 4810V00717A BRACKET, SUPPORTER RN-48SZ40 NB03JA ABS, AF-303S FAN...

  • Page 36: Replacement Parts List

    LA7222 (1280 AUDIO) 0TR387500AA CHIP 2SC3875S(ALY) KEC 0ISO206900A IC208 CXA2069Q QFP64 BK I2C BUS AV S/W 0TR387500AA CHIP 2SC3875S(ALY) KEC IC301 0ICTMLG003C LGDT1502M LG IC 304P QFP 0TR387500AA CHIP 2SC3875S(ALY) KEC IC302 0ITI740000Q SN74LVC00AD 14SOP Q101 0TR387500AA CHIP 2SC3875S(ALY) KEC 0ITI740000Q...
  • Page 37 LOCA. NO PART NO DESCRIPTION LOCA. NO PART NO DESCRIPTION Q107 0TR387500AA CHIP 2SC3875S(ALY) KEC Q207 0TR150400BA CHIP 2SA1504S(ASY) KEC CHIP 2SC3875S(ALY) KEC CHIP 2SA1504S(ASY) KEC Q108 0TR387500AA Q208 0TR150400BA 0TR387500AA CHIP 2SC3875S(ALY) KEC 0TR150400BA CHIP 2SA1504S(ASY) KEC Q108 Q209 Q109 0TR387500AA CHIP 2SC3875S(ALY) KEC...
  • Page 38 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 39 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 40 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 41 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 42 SW07 140-315A TACT SKHV17910B LG C&D NON 12V 0RN3303G409 330K OHM 1/4 W 1.00% TA52 140-313A R805 TACT 2LEAD 100G(TA) LG C&D NON 5V 0.001A R805B 0RD3300F609 330 OHM 1/6 W 5.00% TA52 SW801 140-289A POWER SDDF3PASP013 LG C&D UL/C...
  • Page 43 LOCA. NO PART NO DESCRIPTION LOCA. NO PART NO DESCRIPTION AT1304 0LCCE00018A HB-4M3216-301JT R/TP 100MHZ 300OHM T402 6200QJ3001A FILTER,EMI REEL/TAPING BMS400 25V 200MA HB-4M3216-301JT R/TP 100MHZ 300OHM AT1305 0LCCE00018A T402 6200VJT006A STC222D NIIGATA 50VOLT 4A 2200PF 0LCCE00018A HB-4M3216-301JT R/TP 100MHZ 300OHM 6200QJ3001A AT1306 T403...
  • Page 44 P402B 6612VMH003A P403 6612BBBHN6A 440062-1 AMP DVI INTERACED RIGHT ANGLE ACCESSORIES 3828VA0447T MANUAL,OWNERS MB03CA AP 116T TX 395A 6710V00116T REMOTE CONTROLLER,MB03CA RT-48SZ40RB 172-050V CABLE,COAXIAL(UL1365,2.5C-2V 100M/M) MISCELLANEOUS F800 0FS5001B51D FUSE,SLOW BLOW 5000MA 250 V 5.2X20 6620VF3201A SOCKET(CIRC),IC 822473-3 AMP 32PIN 2.54MM...
  • Page 45 Feb.,2004 P/NO : 3828VD0167D Printed in Korea...
  • Page 50 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 51 RT-44/52SZ50LP RT-48SZ50LP CONTROL(TOP) INDEX(TOP) CONTROL(BOTTOM) INDEX(BOTTOM) LED(TOP) LED(TOP) LED(BOTTOM) LED(BOTTOM) CASE SW BALLAST SIDE AV SIDE AV BALLAST POWER S/W PRE-AMP CASE SW POWER S/W PRE-AMP...

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