LG PT-53A83T Service Manual
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LG PT-53A83T Service Manual

LG PT-53A83T Service Manual

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COLOR TV
SERVICE MANUAL
CHASSIS : MP-015A
MODEL : PT-53A83T
CAUTION
BEFORE SERVICING THE CHASSIS,
READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
DIGITAL INDEX
CH:
MOVIE SPORTS MUSIC
MOVIE SPOR
TS MUSIC
PRO
PRO LOGIC
LOGIC
C
L
R
LS
RS
CA
CATV
TV
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-015A MODEL : PT-53A83T CAUTION BEFORE SERVICING THE CHASSIS, READ THE SAFETY PRECAUTIONS IN THIS MANUAL. DIGITAL INDEX MOVIE SPOR MOVIE SPORTS MUSIC TS MUSIC...

  • 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 .....................18 Block Diagram ....................26 Printed Circuit Board ..................30 Wiring Diagram....................42 Exploded View ....................44 Exploded View Parts List................45 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: Power consumption : Multi 26 System 250 Wmax. (Refer to Table 1) Intermediate Frequency Tuning system : Vision IF : 38.9MHz FVS 100 Program Memory(With Teletext Model) Color IF : 34.47MHz...
  • 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 (With TELETEXT) 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. 11. TURBO PICTURE BUTTON POWER selects Turbo picture. I/II TV/AV 12. TELETEXT BUTTONS (option) These buttons are used for teletext.
  • Page 10 All manuals and user guides at all-guides.com Front panel • PT-48/53A83 series MUTE MENU MUTE MENU TV/AV TV/AV ON/OFF ON/OFF • PT-43A83 series MUTE MENU TV/AV ON/OFF (Side panel) 1. MAIN POWER (ON/OFF) 8. REMOTE CONTROL SENSOR switches the set on or off. 9.

  • 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 green 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) HS (Horizontal Shift) High Voltage Regulation Adjustment Adjust so that the horizontal center line of a digital circle pattern is in accord with geometric horizontal center of the CPT. 1. Test Equipment Digital Multi-Meter(DMM) 5) EW (East-west Width) Adjust until the outermost left and right vertical line of the...
  • Page 13 All manuals and user guides at all-guides.com Lens Focus & Electronic Focus Adjustment 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. 2) Heat-run over 60 minutes. 3) Receive Crosshatch pattern.
  • Page 14 All manuals and user guides at all-guides.com X=0.280 and Y=0.300 (Deviation : ! 0.01). 3. Pattern Position Adjustment 6) Set BRIGHT to L/Light adjustment mode and adjust CR (R 1) Change into pattern shift mode. Cut Off) and CB (B Cut Off) until color coordinate becomes (Press numeric buttons “9”...
  • Page 15 All manuals and user guides at all-guides.com 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...
  • Page 16 All manuals and user guides at all-guides.com 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: With TURBO Search 1: RF 54% Modulation INput TSEAR option3 SCART...
  • Page 17 All manuals and user guides at all-guides.com State Language Funciton Default 0:E Only English 1:EU 5EA English/German/French/Italy/Spanish 2:EU ETC Pol./Hungary/Czecho/Russia/Eng 3:PARSI English/Parsi LANG 4:ARAB DUAL English/French/Arab+Urdu 5:English+Hindi English/Hindi 6:English+I+M+V English/Indonesian/Malaysian/Vietnamese 7:English+THAI English/Thai 8:English+China English/China 0:West Europe English/French/Swedish/Czech/German/Spanish/Itallian 1:East Europe Polish/Fench/Swedish/Czech/German/Slovenian/Italian/Romanian option4 2:Turkey English/French/Swedish/Turkish/German/Spanish/Itallian...

  • Page 18: Troubleshooting

    All manuals and user guides at all-guides.com Trouble Shooting 1. NO PICTURE ( SOUND OK ) CVBS Signal ? Check MAIN1 Q101(E) Waveform. (2Vpp) Check around Waveform of AV Board IC202 #63 ? Check Tuner(TU101) VIDEO output IC202 Waveform of AV Board Q505(E) ? Check around IC202 Waveform of VIDEO Board Check IC501...
  • Page 19 All manuals and user guides at all-guides.com 2. NO SOUND (PICTURE OK) <AV1,2,3,DVD(480i),DVD(480p) INPUT> < RF > Waveform of Waveform of AV Board IC205 Check arround Check MAIN1 Q103 #47,48,50,51,53,54,56,57 each Jack TU101 Q104 ( SIF ) ? at each Mode ? Waveform of Check AV Board IC205...
  • Page 20 All manuals and user guides at all-guides.com 3. NO PIP <AV1,2,3> <RF> <SCART> Waveform of PIP Waveform of AV Board Waveform of MAIN1 Board IC502 IC202 #8,15,22,35 ? Q110(E) ? #1,2,3,7,9 ? Check JA202 Waveform of Video Board Check Video Board IC202 #44 ? Q203,IC202 Check...
  • Page 21 All manuals and user guides at all-guides.com 4. NO Teletext (Picture OK) Waveform of MAIN1 IC501 #4 ? Check Micom IC001 Micom Board Ic001 #21 ? #57~60 Check OPTION3 TEXT Code (SVC MODE) 5. NO OSD (ON SCREEN DISPLAY) Horizontal, Vertical Fly Back Input Waveform of Micom Board IC001 #29,#30 ? Check DEF.
  • Page 22 All manuals and user guides at all-guides.com 6. NO POWER ON Check input voltage of Check SMPS Board IC001#6,8,22,40,56,73,75,92 Check IC001 #52,53 Replace X001 (OSC) Replace Q003, Q004 Check IC001 #11,12 (SCL,SDA) Check Abnormnal Circuit Check IC001 #44 (ABN) HIGH Check IC001 #34 ( IR ), Check P004A connector #31~38 (Key In)
  • Page 23 All manuals and user guides at all-guides.com 7. NO VFD OPERATION (Option) Check AV Board IC205 #5 Check IC205sound output Sound signal. Check IC205 #3 output Check around IC205 Check IC001 #45,46 Check Q008, 007 Check IC001 #47,48,49 Check Q011, Q012 - 23 -...
  • Page 24 All manuals and user guides at all-guides.com 8.NO RASTER Check +B voltage 115V or not Is the voltage Open Check F801 at Pin 76,69 of IC501 5V ? Check 5V,9V, Check / Replace 12V lines F801,D815 IC801 Does the square waveform from Pin 17 Check the voltage of IC702 appear?
  • Page 25 All manuals and user guides at all-guides.com 9. INCORRECT CONVERGENCE Does the static convergence correct? Check the input vlotage Re-adjust static convergence at P201 by remote controller Not controlled Controlled Are there pulse signal Check pulse pin125 Check voltage on the at pin121 of IC2051 of IC2051(4Mhz) SMPS PCB...

  • Page 26: Block Diagram

    All manuals and user guides at all-guides.com BLOCK DIAGRAM(SIGNAL) - 26 -...
  • Page 27 All manuals and user guides at all-guides.com BLOCK DIAGRAM(DEF) IC401 KIA4358 H OUT H-DRIVE DUMMY H-DF H-DRIVE Q402 H-DY TRANS Q403 IRFIBC206 T405 T401 2SC5446 FOCUS V FOCUS PACK HV OUT HVDRIVE HV DRIVE Q413 TRANS T403 BLOCK Q416 IRFIBC206 T402 2SD1887 DYNAMIC...
  • Page 28 All manuals and user guides at all-guides.com BLOCK DIAGRAM(SMPS-WIDE) - 28 -...
  • Page 29 All manuals and user guides at all-guides.com BLOCK DIAGRAM(SMPS-NARROW) - 29 -...

  • Page 30: Printed Circuit Board

    All manuals and user guides at all-guides.com PRINTED CIRCUIT BOARD SIGNAL - 30 -...
  • Page 31 All manuals and user guides at all-guides.com COMPONENT LOCATION GUIDE(SIGNAL) J128..F3 J501 ..B1 R011..A2 R131 ..D4 R667 ..D1 C001..A5 C503 ..C2 E008 ..F1 J46 ..C5 C002..B5 C504 ..C2 F001 ..B5 J47 ..C5 J130 ..G4 L001 ..A4 R012..A2 R132..E4 R668 ..D2 J131..F3 L002 ..A4 R013..A2...
  • Page 32 All manuals and user guides at all-guides.com MAIN2 (DEF) - 32 -...
  • Page 33 All manuals and user guides at all-guides.com COMPONENT LOCATION GUIDE(DEF) R427..E5 R495..E3 R420S ..E3 C457..F3 D437..F4 G405 ..C2 G463 ..C4 J451..F1 Q409 ..D4 C301..E2 SG302 ..A3 G406 ..B2 G464 ..C4 J452..F1 Q410 ..D4 R428..E5 R496..E2 C302..E2 C460..E4 DF ..A3 J453 ..B3 Q413 ..E4 R429..E3 R497..E2...
  • Page 34 All manuals and user guides at all-guides.com SMPS (WIDE) SMPS (NARROW) - 34 -...
  • Page 35 All manuals and user guides at all-guides.com CONV-OUT - 35 -...
  • Page 36 All manuals and user guides at all-guides.com POWER S/W PRE-AMP CONTROL SIDE AV - 36 -...
  • Page 37 All manuals and user guides at all-guides.com VM (TOP) VM (BOTTOM) - 37 -...
  • Page 38 All manuals and user guides at all-guides.com CONVERGENCE (TOP) CONVERGENCE (BOTTOM) - 38 -...
  • Page 39 All manuals and user guides at all-guides.com MICOM (TOP) MICOM (BOTTOM) - 39 -...
  • Page 40 All manuals and user guides at all-guides.com 100HZ (TOP) 100HZ (BOTTOM) - 40 -...
  • Page 41 All manuals and user guides at all-guides.com AV (TOP) AV (BOTTOM) - 41 -...

  • Page 42: Wiring Diagram

    All manuals and user guides at all-guides.com WIRING DIAGRAM 1. ITC & DYC 761-101E 0.3g P204B R,G,B SIDE A/V P03P PRE-AMP HARMONICS PCB P880 ANODE ANODE ANODE P903B P903A P904A P901B P902B P904B GND2R GND2G GND1B SCR1R SCR1G GND1G SCR1B GND5B "B"...
  • Page 43 All manuals and user guides at all-guides.com MEMO - 43 -...

  • Page 44: Exploded View

    All manuals and user guides at all-guides.com EXPLODED VIEW - 44 -...

  • Page 45: Exploded View Parts List

    SPRING,KNOB 5020V00393B BUTTON,POWER WHITE 6871VSM741D PWB ASSY,CONTROL 5020V00458A BUTTON,CONTROL 4KEY 4810V00328G BRACKET,CONTROL 60HR 6871VSM756A PWB ASSY,PSW 3091V00258J CABINET ASSY,LG.100HZ 4980V00132A SUPPORTER,CRT&LENS ETC . 3809V00182D BACK COVER ASSY 3809V00190D BACK COVER ASSY,UPPER 5018V00017A MIRROR,PLASTIC(53N) 4810V00221C BRACKET,MAIN 4810V00327M BRACKET,REAR A/V NO SCART...

  • 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 IC891 0ILI817000G IC,LTV817M-VB 4P,DIP BK PHOTO COU IC901B 0IPH611190A IC,TDA6111Q 9SIP RGB AMP IC001 0IAL241610B IC,AT24C16-10PC-2.7 8PIN DIP ST E IC901G 0IPH611190A IC,TDA6111Q 9SIP RGB AMP...
  • Page 47 All manuals and user guides at all-guides.com LOCA. NO PART NO DESCRIPTION LOCA. NO PART NO DESCRIPTION D435 0DS113379BA DIODE,SWITCHING 1SS133 T-72 TP ROHM D931 0DD060009AC DIODE,TVR06J 0.6A/600V 250NS TP G.I DIODE,SWITCHING 1SS133 T-72 TP ROHM DIODE,TVR06J 0.6A/600V 250NS TP G.I D437 0DS113379BA D932...
  • Page 48 All manuals and user guides at all-guides.com LOCA. NO PART NO DESCRIPTION LOCA. NO PART NO DESCRIPTION ZD1006 0DZ620009BB DIODE,ZENER MTZJ6.2B TP ROHM-K DO34 0.5W Q214 0TR387500AA TR,CHIP 2SC3875S(ALY) KEC TR,CHIP 2SC3875S(ALY) KEC ZD1007 0DZ620009BB DIODE,ZENER MTZJ6.2B TP ROHM-K DO34 0.5W Q215 0TR387500AA ZD1008...
  • 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 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 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 FILTER,EMC DSS6NZ82A103Q93A DSS306-93FZ10 FILTER,FERRITE 1UH TAPING FR886 125-022K ACCESSORIES L217 125-022K FILTER,FERRITE 1UH TAPING L218 125-022K FILTER,FERRITE 1UH TAPING 3828VA0288F MANUAL,OWNERS AP/A83 LG EN 049PTX 395 L501 6210TCE001G FILTER,HH-1M3216-501 CERATEC 3216MM 6710V00049P REMOTE CONTROLLER L503 125-022K FILTER,FERRITE 1UH TAPING MISCELLANEOUS L505 6210TCE001G...
  • Page 62 All manuals and user guides at all-guides.com...
  • Page 63 All manuals and user guides at all-guides.com (WIDE)
  • Page 64 All manuals and user guides at all-guides.com...
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  • Page 66 All manuals and user guides at all-guides.com...
  • Page 67 All manuals and user guides at all-guides.com...

  • Page 68: Svc. Sheet

    All manuals and user guides at all-guides.com SVC. SHEET : 3854V A0094A-S1 SVC. SHEET : 3854V A0094A-S2 SVC. SHEET : 3854V A0094A-S3 SVC. SHE...
  • Page 69 All manuals and user guides at all-guides.com Oct.,2001 P/NO : 3828VD0096E Printed in Korea...

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