LG PT-43A80 Service Manual
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LG PT-43A80 Service Manual

LG PT-43A80 Service Manual

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COLOR TV
SERVICE MANUAL
CHASSIS : MP-00DA
MODEL : PT-43/48/53A80
CAUTION
BEFORE SERVICING THE CHASSIS,
READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
CH:
MOVIE SPORTS MUSIC
MOVIE SPOR
PRO LOGIC
PRO
LOGIC
DIGITAL INDEX
L
C
R
LS
RS
CATV
TV /
website:http://biz.LGservice.com
e-mail:http://www.LGEservice.com/techsup.html

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  • Page 1 All manuals and user guides at all-guides.com website:http://biz.LGservice.com e-mail:http://www.LGEservice.com/techsup.html COLOR TV SERVICE MANUAL CHASSIS : MP-00DA MODEL : PT-43/48/53A80 CAUTION BEFORE SERVICING THE CHASSIS, READ THE SAFETY PRECAUTIONS IN THIS MANUAL. MOVIE SPOR MOVIE SPORTS MUSIC PRO LOGIC LOGIC DIGITAL INDEX CATV TV /...

  • Page 2: Table Of Contents

    All manuals and user guides at all-guides.com 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 Wiring Diagram....................39 Exploded View ....................40 Exploded View Parts List................41 Replacement Parts List ................

  • Page 3: Safety Precautions

    All manuals and user guides at all-guides.com 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

    All manuals and user guides at all-guides.com 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.
  • Page 5 All manuals and user guides at all-guides.com 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.

  • Page 6: Specifications

    All manuals and user guides at all-guides.com SPECIFICATIONS NOTE : Specifications and others are subject to change without notice for improvement. Video input system: Multi 26 System Tuning system : (Refer to Table 1) 100 Program Memory Intermediate Frequency 200 Program Memory(CHINA Only) Vision IF : 38.9MHz Color IF : 34.47MHz [SECAM : 38.9-4.25MHz...
  • Page 7 All manuals and user guides at all-guides.com T able 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...

  • 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. - 8 -...
  • Page 9 All manuals and user guides at all-guides.com 10. TV/AV selects TV or AV mode. clears the menu / text from the screen. switches the set on from standby. POWER 11. TURBO PICTURE BUTTON selects Turbo picture. I/II TV/AV TURBO 12. TELETEXT BUTTONS SOUND PICTURE These buttons are used for teletext.
  • Page 10 All manuals and user guides at all-guides.com Front panel • PT-43A80 series DIGITAL INDEX MOVIE SPOR MOVIE SPORTS MUSIC TS MUSIC MENU CATV TURBO TV/AV DIGITAL INDEX MOVIE SPOR MOVIE SPORTS MUSIC TS MUSIC MENU CATV TURBO TV/AV POWER POWER •...

  • 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 All manuals and user guides at all-guides.com 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”...
  • Page 13 All manuals and user guides at all-guides.com Lens Focus & Electronic Focus Adjustment 1) Turn the lens until the chromatic aberration changed purple to green which of 3.5 Cross-Hatch part from picture's center toward left. 1. Preliminary steps 1) Electronic focus,Raster slope & Raster position must be pre- adjusted.
  • Page 14 All manuals and user guides at all-guides.com White Balance Adjustment 1. Test Equipment Brightness meter(CA110) The vertical center 2. Adjustment 1) This adjustment must be operated in a dark room or equivalent. 2) Adjust after Cut-Off and Focus adjustment. 3) The brightness meter must be located in 20!5 c m distance from the center of the screen.
  • Page 15 All manuals and user guides at all-guides.com 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 Vertical Shift 0600~0900 P SAT Color Saturation 0~16 07DC 0085...
  • Page 16 All manuals and user guides at all-guides.com Range Description Default B2-VE 1: Use VDP3130Y B2 version 0: Not use B2 Version option3 B1-VE 1: Use VDP3130Y B1version 0: Not use B1 Version State Language Funciton Default 0:E Only English 1:English+CIS+R+P English/CIS/Romania/Poland 2:RESERVED 3:English+FARSI...

  • Page 17: Troubleshooting

    All manuals and user guides at all-guides.com 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)
  • Page 18 All manuals and user guides at all-guides.com 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...
  • Page 19 All manuals and user guides at all-guides.com 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...
  • Page 20 All manuals and user guides at all-guides.com 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 All manuals and user guides at all-guides.com 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 ),...
  • Page 22 All manuals and user guides at all-guides.com 7. NO VFD OPERATION 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 All manuals and user guides at all-guides.com 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 All manuals and user guides at all-guides.com 9.INCORRECT CONVERGENCE Does the static convergence correct? Incorrect Dynamic Incorrect Static Readjust static convergence Check the input voltage at by remote controller P201. Normal Abnormal Not controlled Controlled Check pulse pin 125 Check voltage on the Are there pulse signal of IC2051 (4MHz) SMPS PCB...

  • Page 25: Block Diagram

    All manuals and user guides at all-guides.com BLOCK DIAGRAM(SIGNAL) - 25 -...
  • Page 26 All manuals and user guides at all-guides.com BLOCK DIAGRAM(DEF) - 26 -...
  • Page 27 All manuals and user guides at all-guides.com BLOCK DIAGRAM(SMPS) - 27 -...

  • Page 28: Printed Circuit Board

    All manuals and user guides at all-guides.com PRINTED CIRCUIT BOARD SIGNAL - 28 -...
  • Page 29 All manuals and user guides at all-guides.com COMPONENT LOCATION GUIDE(SIGNAL) L100 ..D5 Q033 ..G5 R041..B4 R110..B2 R520 ..D2 R588..F4 C001..A3 C073..F2 C517 ..D2 C620 ..D2 R589 ..G3 C002..A3 C082..B4 C518 ..D2 C621 ..D2 L101 ..D5 Q034 ..G4 R043 ..C5 R111..B2 R521 ..D2 L102 ..E5 Q035 ..B2...
  • Page 30 All manuals and user guides at all-guides.com MAIN2 (DEF) - 30 -...
  • Page 31 All manuals and user guides at all-guides.com COMPONENT LOCATION GUIDE(DEF) R429..E3 R496..E2 T401..D1 C457..F3 D437..F4 G405 ..C2 G463 ..C4 J452..F1 Q413 ..E4 C301..E2 T402..D4 G406 ..B2 G464 ..C4 J453 ..B3 Q416 ..C4 R430..B5 R497..E2 C302..E2 C460..E4 DF ..A3 J454 ..C4 Q417 ..D2 R432..B3 R498 ..C5...
  • Page 32 All manuals and user guides at all-guides.com SMPS POWER SWITCH PRE-AMP - 32 -...
  • Page 33 All manuals and user guides at all-guides.com CONV-OUT - 33 -...
  • Page 34 All manuals and user guides at all-guides.com SIDE AV CONTROL - 34 -...
  • Page 35 All manuals and user guides at all-guides.com VM (TOP) VM (BOTTOM) - 35 -...
  • Page 36 All manuals and user guides at all-guides.com LG CONVERGENCE (TOP) LG CONVERGENCE (BOTTOM) - 36 -...
  • Page 37 All manuals and user guides at all-guides.com SGS-THOMSON CONVERGENCE (TOP) SGS-THOMSON CONVERGENCE (BOTTOM) - 37 -...
  • Page 38 All manuals and user guides at all-guides.com AV (TOP) AV (BOTTOM) - 38 -...

  • Page 39: Wiring Diagram

    All manuals and user guides at all-guides.com WIRING DIAGRAM P204B SIDE A/V P03P PRE-AMP ANODE ANODE ANODE P903B P903A P904A P901B P902B P904B GND2R GND2G GND1B SCR1R SCR1G SCR1B GND1G GND5B "R" CRT PCB "G" CRT PCB "B" CRT PCB GND5G HV BLOCK "...

  • Page 40: Exploded View

    All manuals and user guides at all-guides.com EXPLODED VIEW(PT-43A80) - 40 -...

  • Page 41: Exploded View Parts List

    All manuals and user guides at all-guides.com EXPLODED VIEW PARTS LIST The components identified by mark critical for safety. Replace only with part number specified. Part No. Description 3680V00007A LENS,SEKINOS SSM-75(50) 4810V00326C BRACKET,BLUE LENS+COUPLER+CRT ASSY 4810V00326B BRACKET,GREEN LENS+COUPLER+CRT ASSY 4810V00326A BRACKET,RED LENS+COUPLER+CPT ASSY 120-D38E SPEAKER,MID-RANGE 8 OHM 15/25W 87DB...
  • Page 42 All manuals and user guides at all-guides.com EXPLODED VIEW(PT-48A80) - 42 -...
  • Page 43 All manuals and user guides at all-guides.com EXPLODED VIEW PARTS LIST The components identified by mark critical for safety. Replace only with part number specified. Part No. Description 3680V00007A LENS,SEKINOS SSM-75(50) 4810V00326C BRACKET,BLUE LENS+COUPLER+CRT ASSY 4810V00326B BRACKET,GREEN LENS+COUPLER+CRT ASSY 4810V00326A BRACKET,RED LENS+COUPLER+CPT ASSY 120-D38E SPEAKER,MID-RANGE 8 OHM 15/25W 87DB...
  • Page 44 All manuals and user guides at all-guides.com EXPLODED VIEW(PT-53A80) - 44 -...
  • Page 45 All manuals and user guides at all-guides.com EXPLODED VIEW PARTS LIST The components identified by mark critical for safety. Replace only with part number specified. Part No. Description 3680V00007A LENS,SEKINOS SSM-75(50) 4810V00326C BRACKET,BLUE LENS+COUPLER+CRT ASSY 4810V00326B BRACKET,GREEN LENS+COUPLER+CRT ASSY 4810V00326A BRACKET,RED LENS+COUPLER+CPT ASSY 120-D38E SPEAKER,MID-RANGE 8 OHM 15/25W 87DB...

  • Page 46: Replacement Parts List

    All manuals and user guides at all-guides.com REPLACEMENT PARTS LIST LOCA. NO PART NO DESCRIPTION LOCA. NO PART NO DESCRIPTION IC1206 0ISG111733B IC,LD1117V33C 3SIP ST REGULATOR IC2000 0ICTMSG001A IC,STV2050A SGS-THOMSON D830 0ISK100300A IC,SLA1003 SIP12 BK DIODE MODULE( IC2001 0IPH741400E IC,74HC14D 14SOP TP SHITTER TRIGG D836 0ISK100300A IC,SLA1003 SIP12 BK DIODE MODULE(...
  • Page 47 All manuals and user guides at all-guides.com LOCA. NO PART NO DESCRIPTION LOCA. NO PART NO DESCRIPTION D003 0DD414809ED DIODE,1N4148 TA D801 0DD200009AH DIODE,RECTIFIER RU2AMV(1) TP SANKEN DIODE,1N4148 TA DIODE,DETECTOR 1S2471DETECT SW TP D004 0DD414809ED D802 0DD247109AA D005 0DD414809ED DIODE,1N4148 TA D802 0DD414809ED DIODE,1N4148 TA...
  • Page 48 All manuals and user guides at all-guides.com LOCA. NO PART NO DESCRIPTION LOCA. NO PART NO DESCRIPTION D970 0DD060009AC DIODE,TVR06J 0.6A/600V 250NS TP G.I ZD901R 0DZ560009CF DIODE,ZENER MTZJ5.6B TP ROHM-K DO34 0.5W 5 DIODE,TVR06J 0.6A/600V 250NS TP G.I D971 0DD060009AC ZD901G 0DZ560009CF DIODE,ZENER MTZJ5.6B TP ROHM-K DO34 0.5W 5...
  • Page 49 All manuals and user guides at all-guides.com 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...
  • Page 50 All manuals and user guides at all-guides.com 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...
  • Page 51 All manuals and user guides at all-guides.com 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...
  • Page 52 All manuals and user guides at all-guides.com 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...
  • Page 53 All manuals and user guides at all-guides.com 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...
  • Page 54 All manuals and user guides at all-guides.com 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...
  • Page 55 0CN2210K519 C2054 0CE107SF6DC C1005 0CN2210K519 220P 50V K B TA52 C2056 0CE105SK6DC 1UF MVG 50V M *LG C1006 0CN1040K949 0.1M 50V Z F TA52 “ 0CE107SF6DC 100UF MVG 16V M *THOMSON 4.7UF STD 50V 20% FL TP 5 100UF MVG 16V M SMD R/TP...
  • Page 56 All manuals and user guides at all-guides.com 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...
  • Page 57 All manuals and user guides at all-guides.com 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...
  • Page 58 All manuals and user guides at all-guides.com 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...
  • Page 59 All manuals and user guides at all-guides.com 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...
  • Page 60 All manuals and user guides at all-guides.com 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...
  • Page 61 All manuals and user guides at all-guides.com 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...
  • Page 62 All manuals and user guides at all-guides.com 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...
  • Page 63 All manuals and user guides at all-guides.com 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...
  • Page 64 All manuals and user guides at all-guides.com 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...
  • Page 65 RN : Metal Film RF : Fusible LOCA. NO PART NO DESCRIPTION LOCA. NO PART NO DESCRIPTION ACCESSORIES 3828VA0234A MANUAL,OWNERS NEU LG EN 049P TX 6710V00049P REMOTE CONTROLLER 6710V00049X REMOTE CONTROLLER W/O TXT MISCELLANEOUS 180-836E FOCUS,PACK201-115A011 304-105A CAP,INSULATOR PJT-4535 304-105A...
  • Page 66 All manuals and user guides at all-guides.com P/NO: 3854VA80A (MAIN1/VFD/PIP) DATE: 2000.11.30...
  • Page 67 All manuals and user guides at all-guides.com P/NO: 3854VA80B (SMPS/DEF/CPT/VM) DATE: 2000.11.30...
  • Page 68 All manuals and user guides at all-guides.com...
  • Page 69 All manuals and user guides at all-guides.com Oct., 2000 P/NO : 3828VD0080A Printed in Korea...

This manual is also suitable for:

Pt-48a80Pt-53a80

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