LG RT-44NZ21RB Service Manual
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LG RT-44NZ21RB Service Manual

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P/NO : 3828VD0133A
Mar., 2003
Printed in Korea
COLOR TV

SERVICE MANUAL

CHASSIS : MP-015D
MODEL : RT-44/49/56NZ21RB
CAUTION
BEFORE SERVICING THE CHASSIS,
READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
TV/AV
MENU
OK
VOL
PR
website:http://biz.LGservice.com
e-mail:http://www.LGEservice.com/techsup.htm

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Summary of Contents for LG RT-44NZ21RB

  • Page 1: Service Manual

    website:http://biz.LGservice.com e-mail:http://www.LGEservice.com/techsup.htm COLOR TV SERVICE MANUAL CHASSIS : MP-015D MODEL : RT-44/49/56NZ21RB CAUTION BEFORE SERVICING THE CHASSIS, READ THE SAFETY PRECAUTIONS IN THIS MANUAL. TV/AV MENU Mar., 2003 P/NO : 3828VD0133A Printed in Korea...

  • Page 2: Table Of Contents

    CONTENTS CONTENTS ...................... 2 SAFETY PRECAUTIONS ..................3 SERVICING PRECAUTIONS ................4 SPECIFICATIONS .................... 6 CONTROL DESCRIPTIONS................8 ADJUSTMENT INSTRUCTIONS ..............11 TROUBLE SHOOTING..................20 BLOCK DIAGRAM ..................28 PRINTED CIRCUIT BOARD................32 EXPLODED VIEW ................... 48,50 EXPLODED VIEW PARTS LIST..............49,51 REPLACEMENT PARTS LIST ..............52 SVC.

  • 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 semiconductor "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. Quickly 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: Specifications

    Middle East option 6) Warm up TV set for more than 20min. before the RL-44/49/56NZ21RB France measurement. Test and Inspection Method 1) performance:Follow the Standard of LG TV test 2) Standards of Etc requirement Model Market Remark Appliance RE/RL- EUROPE...
  • Page 7 Feature and Function Specification Remark Item AV Input Side V/L/R Feature (Rear,RT model) V/L/R AV Output (Rear,RT model) V/L/R Component Input COMPONENT1 :480i/L/R Rear COMPONENT2 :480p/L/R S-Video Input Side 1,Rear(SCART) 1 SCART (Rear,RE,RL model) Full SCART(with RGB Input) :1 Half SCART : 1 (AV In/out) Half SCART : 1 (AV In,YC In) Local Key POWER,MENU,VOL(...

  • Page 8: Control Descriptions

    7. NUMBER BUTTONS switches the set on from standby or directly select a number. 8. PSM (Picture Status Memory) recalls your preferred picture setting. (With TELETEXT) 9. VCR BUTTONS control a LG video cassette recorder. - 8 -...

  • Page 9: Battery Installation

    10. TV/AV selects TV or AV mode. clears the menu / text from the screen. switches the set on from standby. 11. TURBO PICTURE BUTTON POWER selects Turbo picture. 12. TELETEXT BUTTONS (option) I/II TV/AV These buttons are used for teletext. TURBO SOUND PICTURE...

  • Page 10: Front Panel

    Front panel ¥ RT-49NZ21RB TV/AV MENU (Side panel) TV/AV MENU 1. MAIN POWER (Volume Down/Up) switches the set on or off. adjusts the volume. adjusts menu settings. 2. TV/AV (Programme Up/Down) selects TV or AV mode. selects a programme or a menu item. clears the menu / text from the screen.

  • Page 11: Adjustment Instructions

    ADJUSTMENT INSTRUCTIONS Raster Slope/Focus 1th Adjustment 45mm 1. Preliminary steps 1) Receive the EU 05 CH signal. 2) Adjustment Lens focus and Electric provisionally. 3) Set the convergence on RESET. a.Adjustment mode:Press the SVC key and then press the /M key. b.Data reset : Press 5 KEY and then OK key.

  • Page 12: Deflection Adjustment

    2. Adjustment 3) Reset the data in convergence adjustment mode,quit the mode. 1) Operate adjustment about Red,Green,Blue centering Adjustment Mode : Press the ÒSVCÓ key and then /M key. magnet. Data reset : Press the Ò5Ó key and then OK key. 2) SGS-THOMSON Convergence assy Adjustment mode cancellation :Press the /M key.
  • Page 13 12) L-VL(Lower Vertical Linearity) 2. G-lens Adjustment Adjust vertical linearity of lower screen 1) Rotate the lens until the chromatic haze changes from blue to red. 13) VL (Vertical Linearity) 2) Viewing the all screen, in no case of the chromatic aberration Adjust the top/bottom size of circle to be same in the EU 05CH.

  • Page 14: Convergence Adjustment

    Convergence Adjustment 4. Auto convergence Convergence is based on the auto adjustment using PC and 1. Preliminary steps Camera while applying the THOMSON convergence Assy and if need,adjust manually like below method. This adjustment should be performed after warming up 60 minutes.

  • Page 15: White Balance Adjustment

    3)If not,press SVC key on R/C to enter adjustment mode and then press the YELLOW key to move into ÔSERVICE Auto-Convergence Check ADJUSTMENT 5Õ 1)Check the Auto-Convergence in PAL/NTSC mode separating. 4)Adjust M-HOR and M-VER so that left/right space to be 2)Press the SVC key on R/C for adjustment and press the symmetry.
  • Page 16 Convergence Adjustment Mode - SVC -> / / M -> MENU * This Mode is for engineering. So,donÕt change before permission from Design Department. 0.AC POSITION READ : Distance data(After auto convergence measuring) 1.Save to 50Hz/60Hz : Save (convergence adjustment data) ItÕs same 9,1,OK.
  • Page 17 SVC Adjustment mode & Initial data Range Menu Description Default DC-TR DC transmission control 1. White Blalane adjustment data (IC:CXA2100) LRGB2 RGB2 output level control Menu Description Range Default DL-PA DElay Line switching Red Drive SHPF0 Sharpness f0 Green Drive CB-F1 INput1 CB signal DC Offset Blue Drive...
  • Page 18 6.OPTION Data Adjustment Range Description Default Range Description Default 1: With Teletext 200 PRO 1: 200 Program(CHINA Only) TEXT 0: Without Teletext(CHINA) 0: 100 Program 1: RF 54% Modulation INput 1: With TURBO Search TSEAR option3 SCART 0: RF 100% Modulation INput 0: Without TURBO Search 1: China+AUST.Channel Table I/II SV...
  • Page 19 State Language Function Default English 0:ENG Only 1:EU 5EA English/German/French/Italy/Spanish 2:EU ETC Pol./Hungary/Czecho/Russia/Eng 3:PARSI English/Parsi LANG 4:ARAB URDU English/French/Arab+Urdu 5:English+Hindi English/Hindi 6:English+I+M+V English/Indonesian/Malaysian/Vietnamese English/Thai 7:English+THAI 8:English+China English/China 0:West Europe English/French/Swedish/Czech/German/Spanish/Italian 1:East Europe Polish/French/Swedish/Czech/German/Slovenian/Italian/Rumanian option4 2:Turkey EU English/French/Swedish/Turkish/German/Spanish/Italian 3:EAST EU2 English/Hungarian/Serbian/Czech/German/Polish/Spanish/Italian/ Rumanian 4:Cyrillic 1 5:Cyrillic 2...

  • Page 20: Trouble Shooting

    TROUBLE SHOOTING - 20 -...
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  • Page 28: Block Diagram

    BLOCK DIAGRAM SIGNAL(RT -) - 28 -...
  • Page 29 BLOCK DIAGRAM SIGNAL(RE/RL-) - 29 -...
  • Page 30 BLOCK DIAGRAM IC401,406 B+(115V) B+(105V ) KIA358 H OUT H-DRIVE DUMMY H-DF H-DRIVE Q402 H-DY TRANS Q403 IRFIBC206 T405 T401 2SC5446 FOCUS FOCUS PACK HV OUT HVDRIVE HV DRIVE Q413 TRANS T403 BLOCK Q416 IRFIBC20G T402 2SD1887 DYNAMIC FOCUS PWM PULSE P411 9V p-p Q433...
  • Page 31 MEMO - 31 -...

  • Page 32: Printed Circuit Board

    PRINTED CIRCUIT BOARD MAIN1 - 32 -...
  • Page 33 COMPONENT LOCATION GUIDE(MAIN1) J218 ..G4 Q602 ..D2 R113 ..G5 R624 ..D2 C001..A5 C202 ..G4 E007 ..F1 J40 ..B2 J111 ..G3 R114..F5 R625 ..C1 C002..B5 C203..F3 E008 ..F1 J41 ..B1 J112 ..G3 J219 ..G4 Q603 ..E2 C205 ..G4 F001 ..B5 J42 ..B4 J113 ..G3 J220 ..G4 Q604 ..E2...
  • Page 34 MAIN2 (DEF) - 34 -...
  • Page 35 COMPONENT LOCATION GUIDE(DEF) C401..A2 C480..F1 E421..B1 G454 ..D1 J455..F2 P408C ..C2 R435..E1 R40D ..E5 C481..E2 E422..C1 G455 ..B1 J456 ..B2 P408D ..C2 R436..E1 R40E ..E5 C402..A2 G456 ..C1 J457 ..E2 P409A ..C2 R437..E4 R40F ..E5 C403 ..D3 C482..E2 E423..D1 P409B ..C2 R438..F4 R40G..E5 C404 ..C1...
  • Page 36 SMPS - 36 -...
  • Page 37 COMPONENT LOCATION GUIDE(SMPS) J851..F5 P850B ..A4 R868 ..G4 C801 ..D5 C868 ..C4 D839 ..G2 G805 ..B5 G863..F4 IC802 ..C3 G865..F4 IC803 ..C1 J854..F2 P850C ..A4 R869 ..G4 C802 ..D5 C869 ..C3 D867 ..G4 G806 ..B4 R870..E3 G807 ..B4 G866..F1 IC805 ..C1 J867..F5 P850D ..A4 C803..B5...
  • Page 38 CONV-OUT - 38 -...
  • Page 39 POWER S/W PRE-AMP CONTROL TACT SW SIDE AV - 39 -...
  • Page 40 VM (TOP) VM (BOTTOM) - 40 -...
  • Page 41 CONVERGENCE (TOP) CONVERGENCE (BOTTOM) - 41 -...
  • Page 42 MICOM (TOP) MICOM (BOTTOM) - 42 -...
  • Page 43 100HZ (TOP) 100HZ (BOTTOM) - 43 -...
  • Page 44 AV (TOP) AV (BOTTOM) - 44 -...
  • Page 45 AUTO CVG SENSOR(BOTTOM) AUTO CVG SENSOR(TOP) - 45 -...
  • Page 46 CONVERGENCE INTERFACE LED TACT SW CONTROL INTERFACE(POWER) INTERFACE(CONTROL) - 46 -...
  • Page 47 MEMO - 47 -...

  • Page 48: Exploded View

    EXPLODED VIEW(RT-44/49NZ21RB) - 48 -...

  • Page 49: Exploded View Parts List

    The components identified by mark EXPLODED VIEW PARTS LIST critical for safety. Replace only with part number specified. Part No. Description 44Ó 49Ó 3680V00048B 3680V00048A LENS. 4810V00666C 4810V00666C BRACKET,PRT ASSY BLUE 4810V00666B 4810V00666B BRACKET,PRT ASSY GREEN 4810V00666A 4810V00666A BRACKET,PRT ASSY RED 120-D38E 6400VA0015A SPEAKER,GENERAL...
  • Page 50 EXPLODED VIEW(RT-56NZ21RB) - 50 -...
  • Page 51 DY,QPC-E10901A 07 SHENG CHANG 31.5KHZ 2H 174-222H CORDASSY POWER(174-219A,L=100)SAA 3091V00A35D CABINET ASSEMBLY,MP015D UPPER 3091V00449B CABINET ASSEMBLY,MP015D 3 SCART 3211V00086E FRAME ASSEMBLY,FRONT LOWER RT-56NZ21RB LG(SILVER) 4778V00012A LEG,CASTER HN-64A10 POLY URETHANE 55.4MM 3350V00017A SCREEN,DNP NON PJT NON NON 3790V00298R WINDOW,FILTER X2-56W NON NON 4980V00287D SUPPORTER ASSY, LENS&PRT...

  • Page 52: Replacement Parts List

    The components identified by mark critical for safety. REPLACEMENT PARTS LIST Replace only with part number specified. LOCA. NO PART NO DESCRIPTION LOCA. NO PART NO DESCRIPTION IC409 0IKE780500Q IC, KIA7805API 3P TO-220 ST REGULA IC, KA7905 TO-220 BK REGULATOR IC IC410 0ISS790500C IC001...
  • Page 53 LOCA. NO PART NO DESCRIPTION LOCA. NO PART NO DESCRIPTION Q004 0TR387500AA TR,CHIP 2SC3875S(ALY) Q208 0TR387500AA TR ,CHIP 2SC3875S(ALY) TR,BIPOLARS,KTC3198(KTC1815) TP TO92 5 TR ,CHIP 2SC3875S(ALY) Q004 0TR319809AA Q209 0TR387500AA 0TR319809AA TR,BIPOLARS,KTC3198(KTC1815) TP TO92 5 0TR387500AA TR ,CHIP 2SC3875S(ALY) Q005 Q210 Q006 0TR150400BA...
  • Page 54 LOCA. NO PART NO DESCRIPTION LOCA. NO PART NO DESCRIPTION Q508 0TR387500AA TR,CHIP 2SC3875S(ALY) 0TR319809AA TR,BIPOLARS KTC3198(KTC1815) TP TO92 5 TR,CHIP 2SC3875S(ALY) TR,BIPOLARS KTC3198(KTC1815) TP TO92 5 Q509 0TR387500AA 0TR319809AA 0TR387500AA TR,CHIP 2SC3875S(ALY) 0TR319809AA TR,BIPOLARS KTC3198(KTC1815) TP TO92 5 Q510 Q511 0TR387500AA TR,CHIP 2SC3875S(ALY)
  • Page 55 LOCA. NO PART NO DESCRIPTION LOCA. NO PART NO DESCRIPTION D441 0DD100009AQ DIODE,RECTIFIERSRP1HV(1) TP SANKEN D904B 0DR210009AC DIODE,RECTIFIERS BAV21 TP DO35 200V 0.2 DIODE,RECTIFIERS1N4005 TP DIODE,RECTIFIERS BAV21 TP DO35 200V 0.2 D442 0DD400509AA D904G 0DR210009AC 0DS113379BA DIODE,SWITCHING 1SS133 T-72 TP DO34 0DR210009AC DIODE,RECTIFIERSBAV21 TP DO35 200V 0.2 D444...
  • Page 56 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 57 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 58 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 59 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 60 The components identified by mark For Capacitor & Resistors, CC, CX, CK, CN : Ceramic RD : Carbon Film the charactors at 2nd and 3rd CQ : Polyestor RS : Metal Oxide Film critical for safety. digit in the P/No. means as CE : Electrolytic RN : Metal Film Replace only with part number specified.
  • Page 61 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 62 P003A 387-A08A CONNECTOR ASSY,8P (L=100) PSVM1B 366-932B CONNECTOR,WAFER 2.5MM 3P S (STI P004 366-922M CONNECTOR,WAFER 2.5MM 13P GIL-G LG CABLE R/A ( PSVM2 366-922B CONNECTOR,WAFER 2.5MM 3P R/A (B P004EP 366-932D CONNECTOR,WAFER 2.5MM 5P GIL-G LG CABLE S (STI PSVM2A 366-932B CONNECTOR,WAFER 2.5MM 3P S (STI...
  • Page 63 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 64 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 65 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 66 The components identified by mark For Capacitor & Resistors, CC, CX, CK, CN : Ceramic RD : Carbon Film the charactors at 2nd and 3rd CQ : Polyestor RS : Metal Oxide Film critical for safety. digit in the P/No. means as CE : Electrolytic RN : Metal Film Replace only with part number specified.
  • Page 67 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 68 FILTER,EMC FERRITE 1UH TAPING SW801S 140-289A SWITCH,POWER SDDF3PASP013 LG C&D UL/C FB816 125-022K FILTER,EMC FERRITE 1UH TAPING SWT1 140-313B SWITCH,TACT 2LEAD 160G(TA) LG C&D NON FB818 125-022K FILTER,EMC FERRITE 1UH TAPING 140-313B FILTER,EMC BFD3565R2F(TAPING) SWT2 SWITCH,TACT 2LEAD 160G(TA) LG C&D NON FB901B...
  • Page 69 SPARK GAP,AXIAL WSP-301M 300V 20% AXIAL TYPE 5 SG903R 6918VAX002D SPARK GAP,AXIAL WSP-301M 300V 20% AXIAL TYPE 5 ACCESSORIES 3828VA0372D MANUAL,OWNERS MP015D AP LG EN 092R/U TX 395A 6710V00092R REMOTE CONTROLLER,MP015D TXT - 47KEY 3890V01415L BOX,49NZ10 49 DWR2 1292-688 3890V01579A...
  • Page 70 P/NO:3854VA0094D-S1(1/2) 2003.03.13...
  • Page 71 P/NO:3854VA0094D-S1(2/2) 2003.03.13...
  • Page 72 P/NO:3854VA0094D-S2(1/2) 2003.03.13...
  • Page 73 P/NO:3854VA0094D-S2(2/2) 2003.03.13...
  • Page 74 P/NO:3854VA0094D-S3 2003.03.13...

  • Page 75: Svc. Sheet

    SVC. SHEET : 3854V A0094D-S1 3854V A0094D-S2 3854V A0094D-S3...

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