LG RT-44NA10T Service Manual
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LG RT-44NA10T Service Manual

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COLOR TV
SERVICE MANUAL
CHASSIS : MP-00DA
MODEL : RT-44NA10T
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-44NA10T

  • Page 1 COLOR TV SERVICE MANUAL CHASSIS : MP-00DA MODEL : RT-44NA10T 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 Specifications ....................6 Control Descriptions ..................8 Adjustment......................11 Troubleshooting .....................17 Block Diagram ....................25 Printed Circuit Board ..................28 Exploded View ....................40 Exploded View Parts List................41 Replacement Parts List ................42 SVC.

  • Page 3: Safety Precautions

    SAFETY PRECAUTIONS I M P O RTANT 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 e l e c t r i c i t y .
  • 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: Specifications

    SPECIFICATIONS NOTE : Specifications and others are subject to change without notice for improvement. ● Video input system: ● Tuning system : Multi 26 System (Refer to Table 1) 100 Program Memory ● Intermediate Frequency 200 Program Memory(CHINA Only) Vision IF : 38.9MHz ※SECAM : Color IF : 34.47MHz 38.9-4.25MHz...
  • Page 7 Table 1 : Receiving System (26 System) Receiving System Receiving Channel Function P P A A L L - - B B P P A A L L - - G G V V H H F F B B a a n n d d P P A A L L - - I I PAL/SECAM-B : : 2 2 - - 1 1 2 2...

  • 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. 9. VCR BUTTONS control a LG video cassette recorder. (With TELETEXT) - 8 -...
  • Page 9 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. I/II TV/AV 12. TELETEXT BUTTONS (option) These buttons are used for teletext. TURBO SOUND PICTURE...
  • Page 10 Front panel • RT-54/49/44NA10T series TV/AV MENU MUTE TV/AV MENU MUTE POWER (Side panel) • RT-54/44NA20T series MUTE MENU TV/AV MUTE MENU TV/AV ON/OFF ON/OFF • RT-54/44NA40T series MUTE MENU TV/AV MUTE MENU TV/AV POWER 1. MAIN POWER 8. REMOTE CONTROL SENSOR switches the set on or off.

  • Page 11: Adjustment

    ) to reset the convergence. 1. Test Equipment Signal Generator can produce DOT pattern 2. Adjustment LG Convergence assy 2. Preliminary steps Make red raster using lens cover and coincide 1) Heat run over 60 minutes. horizontal/vertical center lines of pattern with those of 2) Pre-adjust Raster slope,Raster position &...
  • Page 12 4) VL (Vertical Linearity) ●High Voltage Regulation Adjustment Adjust so that the boundary line between upper and lower half is in accord with geometric horizontal center of the CPT. 1. Test Equipment Digital Multi-Meter(DMM) 5) SC (Vertical “S” Correction) Adjust so that all distance between each horizontal lines are 2.
  • Page 13 to green which of 3.5 Cross-Hatch part from picture's center ●Lens Focus & Electronic Focus Adjustment toward left. 1. Preliminary steps 1) Electronic focus,Raster slope & Raster position must be pre- adjusted. 2) Heat-run over 60 minutes. 3) Receive Crosshatch pattern. 4) Adjustment must be operated in a dark room(simple dark 2) Adjust the chromatic aberration become center of purple and room) and pay attention not to touch the lens during...
  • Page 14 ●White Balance Adjustment 3. Pattern Position Adjustment 1) Change into pattern shift mode. 1. Test Equipment (Press numeric buttons “9” & “4”) Brightness meter(CA110) 2) Make sure to overlap pattern and image. (Use MUTE button) 2. Adjustment 3) Accord the center of image and pattern. 1) This adjustment must be operated in a dark room or (Use buttons)
  • Page 15 2. Deflection adjustment data (IC:VDP3130Y) Menu Description Range Default P PKG Green Peak Level 0~256 Default Menu Description Range NTSC P PKB Blue Peak Level 0~256 07FC P SAT Color Saturation 0~16 Vertical Shift 0600~0900 07DC 0085 0050~00CF P YPE Y Peaking Vertical Amp 0085...
  • Page 16 Range Description Default Range Description Default 1: With C-SPK IN VFD C-MUTE C-SPK 1: RF Normal sound modulation option3 0: W/O C-SPK IN VFD(43”) 0: HIGH deviation modulation(China) option3 SCREE 1: Matsushita PRT. M-VOL 0: S/S PRT. BVFD 1: With VFD 0: W/O VFD(A81 Model) B2-VE 1: VDP3130Y B2 version...

  • Page 17: Troubleshooting

    Trouble Shooting 1. NO PICTURE ( SOUND OK ) CVBS Signal ? Check MAIN1 Q026(E) Waveform. (2Vpp) Check around Waveform of AV Board Q200(E) ? Check Tuner(TU101) VIDEO output IC200 Waveform of AV Board IC202 #11 ? Check around IC201, 202 Waveform of MAIN1 IC501 #63 ? Check AV Board VQ202(E) Check around IC501 #37, #38, #39...
  • Page 18 2. NO SOUND (PICTURE OK) <AV1,2,3,SCART INPUT> < RF > Waveform of Waveform of AV Board IC7 01 Check Check JA202 Jack MAIN1 Q022(E) #47,48,50,51,53,54,56,57 TU101 ( SIF ) ? at each Mode ? Waveform of Check AV Board IC701 around #67 ? Q706...
  • Page 19 3. NO PIP <AV1,2,3> <RF> <SCART> Waveform of AV Board Waveform of PIP Waveform of MAIN1 IC200 #27,29,31 ? Board IC1201 #28 ? Q027(E) ? Check JA202 Waveform of AV Board Check AV Board IC200 #13 ? IC200, Q201 Check Scart Jack JA204 Waveform of PIP Board...
  • Page 20 4. NO Teletext (Picture OK) Waveform of MAIN1 IC501 #59 ? Check PIP Board Waveform of IC001 #12 ? IC1205 #2, #4 Check OPTION1 TEXT Code (SVC MODE) 5. NO OSD (ON SCREEN DISPLAY) Horizontal, Vertical Fly Back Input Waveform of MAIN1 IC001 #19,#20 ? Check DEF.
  • Page 21 6. NO POWER ON 6.1 MICOM PART CHECK Check input voltage of Check SMPS Board IC001#9,11,13,30,37,42,44 Check IC001 #34,35 Replace X001 (OSC) Replace Q003, Q004 Check IC001 #3, 4 (SCL,SDA) Check Abnormnal Circuit Check IC001 #46 (ABN) HIGH Check IC001 #24 ( IR ), Check P004AP connector #47~52 (Key In) - 21 -...
  • Page 22 7. NO VFD OPERATION (OPTION) Check AV Board IC750 #5 Check IC701sound output Sound signal. Check IC750 #3 output Check around IC750 Check IC001 #18, 21, 22 Check Q008, 007 Check IC001 #23, 25, 27 Check Q011, Q012 - 22 -...
  • Page 23 8.NO RASTER Check +B voltage at Pin1 of P805A. Normal Open Is the voltage at Check F801. Pin 15,17 of IC501 3.3V? Check/Replace Check 5V, 9V, F801, D802, 12V lines IC801,IC802. Does the square Check the voltage waveform from pin50 of C812(+).
  • Page 24 9.INCORRECT CONVERGENCE Does the static convergence correct? Incorrect Dynamic Incorrect Static Readjust static convergence Check the input voltage at by remote controller P201. Abnormal Controlled Normal Not controlled Check pulse pin 125 Check voltage on the Are there pulse signal of IC2051 (4MHz) SMPS PCB at pin 121 of IC2051...

  • Page 25: Block Diagram

    BLOCK DIAGRAM(SIGNAL) - 25 -...
  • Page 26 BLOCK DIAGRAM(DEF) - 26 -...
  • Page 27 BLOCK DIAGRAM(SMPS) - 27 -...

  • Page 28: Printed Circuit Board

    PRINTED CIRCUIT BOARD SIGNAL - 28 -...
  • Page 29 COMPONENT LOCATION GUIDE(SIGNAL) C001..A3 C073..F2 C517 ..D2 C620 ..D2 L100 ..D5 Q033 ..G5 R041..B4 R110..B2 R520 ..D2 R588..F4 C082..B4 C518 ..D2 C621 ..D2 L101 ..D5 Q034 ..G4 R043 ..C5 R111..B2 R521 ..D2 R589 ..G3 C002..A3 R112 ..C2 R522 ..D2 R590 ..C1 C003..A3 C083..B4 C519 ..D2...
  • Page 30 MAIN2 (DEF) - 30 -...
  • Page 31 COMPONENT LOCATION GUIDE(DEF) C301..E2 C457..F3 D437..F4 G405 ..C2 G463 ..C4 J451..F1 Q409 ..D4 R427..E5 R495..E3 R420S ..E3 C302..E2 C460..E4 DF ..A3 G406 ..B2 G464 ..C4 J452..F1 Q410 ..D4 R428..E5 R496..E2 SG302 ..A3 C303..F2 C461 ..C5 DFGND ..A3 G407 ..B2 G465 ..B2 J453 ..B3 Q413 ..E4 R429..E3...
  • Page 32 SMPS POWER SWITCH PRE-AMP - 32 -...
  • Page 33 CONV-OUT - 33 -...
  • Page 34 SIDE AV CONTROL - 34 -...
  • Page 35 VM (TOP) VM (BOTTOM) - 35 -...
  • Page 36 LG CONVERGENCE (TOP) LG CONVERGENCE (BOTTOM) - 36 -...
  • Page 37 SGS-THOMSON CONVERGENCE (TOP) SGS-THOMSON CONVERGENCE (BOTTOM) - 37 -...
  • Page 38 AV (TOP) AV (BOTTOM) - 38 -...
  • Page 39 MEMO - 39 -...

  • Page 40: Exploded View

    EXPLODED VIEW - 40 -...

  • Page 41: Exploded View Parts List

    6871VSM756H PWB ASSY,(00DA)NA10 CONT 4810V00618N BRACKET,CONTROL 5020V00664A BUTTON RT-44NA10 CONTROL SET 6871VSMA10A PWB ASSY,PSW 3091V00A46E CABINET ASSY,RT-44NA10 3090V00323A UPPER 3091V00A23F CABINET ASSY,3090V00298A LG NO . 4778V00011A LEG,ROLLER CASTER 3211V00070E FRAME ASSEMBLY,3210V00106A LG(SILVE 3300V00066A PLATE FRONT WOOD 320-062J SPRING,KNOB 5020V00393R BUTTON...

  • Page 42: Replacement Parts List

    R E P L ACEMENT PA RTS LIST LOCA. NO PART NO DESCRIPTION LOCA. NO PART NO DESCRIPTION IC2004 0ITI347000A IC,LF347D 14P,SOP TP QUAD OPERATI IC2005 0IAL241600B IC,AT24C16-10PC 8D EEPROM 16K D830 0ISK100300A IC,SLA1003 SIP12 BK DIODE MODULE( IC2006 0IMCRAL003A IC,AT24C164-10PC ATMEL 8PIN ST EE D836 0ISK100300A...
  • Page 43 LOCA. NO PART NO DESCRIPTION LOCA. NO PART NO DESCRIPTION D426 0DD410000AC DIODE,RECTIFIER RU4DS,LF-L1 D908 0DD226239AA DIODE,SWITCHING CHIP KDS226 SOT-23 D427 0DR360000AA DIODE,RECTIFIERS FMG-36S BK S D910 0DD226239AA DIODE,SWITCHING CHIP KDS226 SOT-23 D428 0DR500000AA DIODE,RECTIFIERS FMQ-G5FMS BK D970 0DD060009AC DIODE,RECTIFIERS TVR06J D430 0DD414809ED DIODE,1N4148 TA...
  • Page 44 LOCA. NO PART NO DESCRIPTION LOCA. NO PART NO DESCRIPTION ZD2804 0DZRM00178A DIODE,ZENERS UDZS TE-17 5.1B ROHM Q426 0TR319809AA TR,KTC3198 TP KEC ZD2805 0DZ240009DC DIODE,ZENER MTZJ2.4B TP DO34 0.5W 2 Q427 0TR319809AA TR,KTC3198 TP KEC Q428 0TR322709AA TR,KTC3227-Y,TP(K TRANSISTOR Q432 0TR126609AA TR,KTA1266-TP-Y ( Q009...
  • Page 45 For Capacitor & Resistors, the CC, CX, CK, CN : Ceramic RD : Carbon Film charactors at 2nd and 3rd digit CQ : Polyestor RS : Metal Oxide Film in the P/No. means as follows; CE : Electrolytic RN : Metal Film RF : Fusible LOCA.
  • Page 46 For Capacitor & Resistors, the CC, CX, CK, CN : Ceramic RD : Carbon Film charactors at 2nd and 3rd digit CQ : Polyestor RS : Metal Oxide Film in the P/No. means as follows; CE : Electrolytic RN : Metal Film RF : Fusible LOCA.
  • Page 47 For Capacitor & Resistors, the CC, CX, CK, CN : Ceramic RD : Carbon Film charactors at 2nd and 3rd digit CQ : Polyestor RS : Metal Oxide Film in the P/No. means as follows; CE : Electrolytic RN : Metal Film RF : Fusible LOCA.
  • Page 48 For Capacitor & Resistors, the CC, CX, CK, CN : Ceramic RD : Carbon Film charactors at 2nd and 3rd digit CQ : Polyestor RS : Metal Oxide Film in the P/No. means as follows; CE : Electrolytic RN : Metal Film RF : Fusible LOCA.
  • Page 49 For Capacitor & Resistors, the CC, CX, CK, CN : Ceramic RD : Carbon Film charactors at 2nd and 3rd digit CQ : Polyestor RS : Metal Oxide Film in the P/No. means as follows; CE : Electrolytic RN : Metal Film RF : Fusible LOCA.
  • Page 50 For Capacitor & Resistors, the CC, CX, CK, CN : Ceramic RD : Carbon Film charactors at 2nd and 3rd digit CQ : Polyestor RS : Metal Oxide Film in the P/No. means as follows; CE : Electrolytic RN : Metal Film RF : Fusible LOCA.
  • Page 51 For Capacitor & Resistors, the CC, CX, CK, CN : Ceramic RD : Carbon Film charactors at 2nd and 3rd digit CQ : Polyestor RS : Metal Oxide Film in the P/No. means as follows; CE : Electrolytic RN : Metal Film RF : Fusible LOCA.
  • Page 52 100 OHM 1/6 W 5.00% TA52 P903A 387-A09F CONNECTOR ASSY,9P (L=350) R027 0RD1000F609 100 OHM 1/6 W 5.00% TA52 P904B 366-921H CONNECTOR,2.5MM 9P GIL-G LG CABLE R028 0RD4701F609 4.7K OHM 1/6 W 5.00% TA52 P904A 387-A09F CONNECTOR ASSY,9P (L=350) R029 0RD4701F609 4.7K OHM 1/6 W 5.00% TA52...
  • Page 53 For Capacitor & Resistors, the CC, CX, CK, CN : Ceramic RD : Carbon Film charactors at 2nd and 3rd digit CQ : Polyestor RS : Metal Oxide Film in the P/No. means as follows; CE : Electrolytic RN : Metal Film RF : Fusible LOCA.
  • Page 54 For Capacitor & Resistors, the CC, CX, CK, CN : Ceramic RD : Carbon Film charactors at 2nd and 3rd digit CQ : Polyestor RS : Metal Oxide Film in the P/No. means as follows; CE : Electrolytic RN : Metal Film RF : Fusible LOCA.
  • Page 55 For Capacitor & Resistors, the CC, CX, CK, CN : Ceramic RD : Carbon Film charactors at 2nd and 3rd digit CQ : Polyestor RS : Metal Oxide Film in the P/No. means as follows; CE : Electrolytic RN : Metal Film RF : Fusible LOCA.
  • Page 56 For Capacitor & Resistors, the CC, CX, CK, CN : Ceramic RD : Carbon Film charactors at 2nd and 3rd digit CQ : Polyestor RS : Metal Oxide Film in the P/No. means as follows; CE : Electrolytic RN : Metal Film RF : Fusible LOCA.
  • Page 57 For Capacitor & Resistors, the CC, CX, CK, CN : Ceramic RD : Carbon Film charactors at 2nd and 3rd digit CQ : Polyestor RS : Metal Oxide Film in the P/No. means as follows; CE : Electrolytic RN : Metal Film RF : Fusible LOCA.
  • Page 58 FILTER,DSS6NZ82A103Q93A DSS306-93FZ10 FB807 125-022K FILTER,FERRITE 1UH TAPING ACCESSORIES FB808 125-022K FILTER,FERRITE 1UH TAPING FB809 125-022K FILTER,FERRITE 1UH TAPING 3828VA0348D MANUAL,OWNERS MP00DA AP LG EN FB810 125-022K FILTER,FERRITE 1UH TAPING 6710V00084T REMOTE CONTROLLER FB811 125-022K FILTER,FERRITE 1UH TAPING MISCELLANEOUS FB871 125-022K...
  • Page 59 LOCA. NO PART NO DESCRIPTION LOCA. NO PART NO DESCRIPTION NT802 163-048D THERMISTOR,KL15L2R5 +/- 15% 125V SK901 381-226L SOCKET(CIRC),CPT PCS628-03L(W/BAND)100K OHM PAR SK902 381-226L SOCKET(CIRC),CPT PCS628-03L(W/BAND)100K OHM PAR SK903 381-226L SOCKET(CIRC),CPT PCS628-03L(W/BAND)100K OHM PAR TU101 6700VPF011A TUNER,TAUC-Z140D TU102 6700VPF011B TUNER,TAFC-Z140P VA801 164-003D VARISTOR,SVC561D-14A...
  • Page 60 P/NO: 3854VA80A (MAIN1/VFD/PIP) DATE: 2000.11.30...
  • Page 61 P/NO: 3854VA80C (AV/SIDE-AV/CONV/CONV-OUT) DATE: 2000.11.30...
  • Page 62 P/NO: 3854VA80B (SMPS/DEF/CPT/VM) DATE: 2000.11.30...

  • Page 64: Svc. Sheet

    S VC. SHEET : 3854V A0080A-S S VC. SHEET : 3854V A0080B-S S VC. SHE...

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