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LG RF-20CA80VE Service Manual
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LG RF-20CA80VE Service Manual

LG RF-20CA80VE Service Manual

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COLOR TV
SERVICE MANUAL
CHASSIS : MC-019A
MODEL : RF/RT-20/21CA80VE/VQ/VW
MODEL :
RF/RT-14/21CA80M/MX
MODEL :
CF-21CA810EX/RF-21CB90VQ
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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  • 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 : MC-019A MODEL : RF/RT-20/21CA80VE/VQ/VW MODEL : RF/RT-14/21CA80M/MX MODEL : CF-21CA810EX/RF-21CB90VQ CAUTION BEFORE SERVICING THE CHASSIS, READ THE SAFETY PRECAUTIONS IN THIS MANUAL.

  • 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 Description of Controls .................. 7 Disassembly Instructions ................10 Adjustment ......................11 Purity & Convergence Adjustment ............14 Block Diagram ......................17 Exploded View .................... 18,20 Exploded View Parts List ................19,21 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 SPECIFICA TIONS Note : Specification and others are subject to change without notice for improvement. Video input system: PAL-B/G, D/K, I/I SOUND IF : 33.4MHz (B/G) SECAM-B/G, D/K,L/L’ 32.9MHz (I/I) NTSC M 32.4MHz (D/K) NTSC 4.43 34.4MHz (M) Intermediate Frequency (Unit : MHz)

  • Page 7: Description Of Controls

    All manuals and user guides at all-guides.com DECRIPTIONS OF CONTROLS All the functions can be controlled with the remote control handset. Some functions can also be adjusted with the buttons on the front panel of the set. Remote control handset Before you use the remote control handset, please install the bat- teries.
  • Page 8 All manuals and user guides at all-guides.com 10. MUTE switches the sound on or off. 11. TV/AV selects TV or AV mode. clears the menu from the screen. switches the set on from standby. 12. I/II/ (option) selects the language during dual language broadcast. (option) selects the sound output.
  • Page 9 All manuals and user guides at all-guides.com Front panel Shown is a simplified representation of front or side panel. Here shown may be somewhat different from your set. VIDEO VIDEO ON/OFF MENU OK VIDEO (L)-AUDIO-(R) P-TURBO-S AUDIO AUDIO 2 3 4 TURBO ON/OFF MENU OK...

  • Page 10: Disassembly Instructions

    All manuals and user guides at all-guides.com DISASSEMBLY INSTRUCTIONS Important note Chassis Assy Removal This set is disconnected from the power supply through the Grasp both side of Frame and pull it backward smoothly. converter transformer. An isolating transformer is necessary for service operations on the primary side of the converter transformer.

  • Page 11: Adjustment

    All manuals and user guides at all-guides.com ADJUSTMENT Safety Precautions Option Code Function Remark 1. It is safe to adjust after using insulating transformer W/O TBS between the power supply line and chassis input to WITH TBS prevent the risk of electric shock and protect the instrument.
  • Page 12 Table below. 5) Press the OK( ) button to memorize the data. Status Initial Data Remark 6700VPF009G Tuner P/N 6700VPF016A LG Innotek(W/S TUNER) Marker DAEWOO(W/S TUNER) 2.7! 0.05V AGC Voltage 2.7! 0.05V 6700VPF009S Tuner P/N BLO-R...
  • Page 13 2. Deflection Initial Setup Data Status Default 21" FLAT S/S 21" FLAT LG 3. Deflection Adjustment Procedure VL (Vertical Linearity) Adjust so that the boundary line between upper and lower half is in accord with geometric horizontal center of the CPT.

  • Page 14: Purity & Convergence Adjustment

    All manuals and user guides at all-guides.com PURITY & CONVERGENCE ADJUSTMENT Caution: 5. Reconnect the internal degaussing coil. Convergence and Purity have been factory aligned. Do not attempt to tamper with these alignments. 6. Position the beam bender locking rings at the 9 o'clock However, the effects of adjacent receiver components, or position and the other three pairs of tabs (2,4 and 6 pole replacement of picture tube or deflection yoke may require the...
  • Page 15 All manuals and user guides at all-guides.com 1.ADJUST YOKE Z-AXIS FIRST 2 .ADJUST BEAM BENDER 2 POLE TO GET EQUAL BLUE MAGNET TO GET FOUR EQUAL COLOR CIRCLES COLOR CIRCLES MAGNETS 8. Referring to above, perform the following two steps: 6.
  • Page 16 All manuals and user guides at all-guides.com ROTATION DIRECTION RING MOVEMENT OF RED OF BOTH TABS PAIRS AND BLUE BEAMS OPPOSITE POLE SAME OPPOSITE POLE SAME UP/DOWN ROCKING OF THE YOKE LEFT/RIGHT ROCKING OF THE YOKE UP/DOWN ROCKING OF THE YOKE LEET/RIGHT ROCKING OF THE YOKE CAUSES OPPOSITE ROTATION OF RED CAUSES OPPOSITE SIZE CHANGE OF THE...

  • Page 17: Block Diagram

    All manuals and user guides at all-guides.com BLOCK DIAGRAM - 17 -...

  • Page 18: Exploded View

    All manuals and user guides at all-guides.com EXPLODED VIEW - 18 -...

  • Page 19: Exploded View Parts List

    All manuals and user guides at all-guides.com The components identified by mark critical for safety. EXPLODED VIEW PARTS LIST Replace only with part number specified. PART NO LOCA. NO DESCRIPTIONS 14” 20” 21” 2055-00744L 2055-V1221Y 6341V21006B CPT ASSY 2055-00744L 6341V21006C CPT ASSY *HAFIDH ,LGEMC,BROTHERS 2055-V1221D 6341V21006D...
  • Page 20 All manuals and user guides at all-guides.com EXPLODED VIEW (CB90) - 20 -...
  • Page 21 4980V00035A SUPPORTER,BASE EVA NONE 3809V00345B BACK COVER ASSEMBLY,RF-21CB90VQ(PPL) 1PHONE . 6871VMMP38Q PWB(PCB) ASSEMBLY,MAIN MC019A RF-21CB90VQ.KMLLKS2(SHAHAB PPL) 6871VSM360R PWB(PCB) ASSEMBLY,MAIN SUB TURBO(019A/B)PIC/SOUND (W/O GAME)F-CKD ETC. 0IGL120104A IC,LG SEMICONDUCTOR,CDS SENSOR MODULE(P1201-04) 332-057B SCREW,DRAWING ASSY,HEXAGON HEAD 1PTF0403116 SCREW,TAP TITE(P)[TRUSS HEAD] - 21 -...

  • Page 22: Replacement Parts List

    All manuals and user guides at all-guides.com 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 ZD441 0DZ620009AK DIODE,ZENERS GDZJ6.2B TP GRANDE DO34 0.5W ZD442 0DZ820009BF DIODE,ZENERS GDZJ8.2B TP GRANDE DO34 0.5W...
  • Page 23 All manuals and user guides at all-guides.com 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.
  • Page 24 All manuals and user guides at all-guides.com The components identified by mark For Capacitor & Resistors, CC, CX, CK, CN : Ceramic RD : Carbon Film critical for safety. the charactors at 2nd and 3rd CQ : Polyestor RS : Metal Oxide Film digit in the P/No.
  • Page 25 All manuals and user guides at all-guides.com 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.
  • Page 26 0RD5601F609 5.6K OHM 1/6 W 5.00% TA52 “ 0RD3301F609 3.3K OHM 1/6 W 5.00% TA52 SW01 140-315A SWITCH,TACT SKHV17910B LG C&D NON 12V R606 0RD1102F609 11K OHM 1/6 W 5.00% TA52 SW02 140-315A SWITCH,TACT SKHV17910B LG C&D NON 12V “...
  • Page 27 MANUAL,OWNERS NON LG AR/EN 6710V00090C REMOTE CONTROLLER W/TXT GS 6710V00090V REMOTE CONTROLLER W/O TXT 6710V00090D REMOTE CONTROLLER,W/O TXT LG 6710V00074B REMOTE CONTROLLER W/O TXT LG LGEIN 6710V00090A REMOTE CONTROLLER W/TXT LG 5010V00005C ANTENNA 2 POLE 3 SECTION 700MM 650MM MISCELLANEOUS SK901 6620VBC003A SOCKET,CPT PCS030A 8PIN 14/360 “...
  • Page 28 All manuals and user guides at all-guides.com P/NO:3854VA0083A-S 2002.11.14...
  • Page 29 All manuals and user guides at all-guides.com PRINTED CIRCUIT BOARD...
  • Page 30 All manuals and user guides at all-guides.com COMPONENT LOCATION GUIDE C01..B4 C403 ..G4 C607..B3 C811 ..G3 F812 ..E2 L801 ..E4 R05..B4 R218 ..D5 R554 ..D4 R820..F4 C02..B4 C404 ..G4 C611..B3 C812..E2 F801A ..G2 L802 ..E3 R06..B3 R219 ..D5 R555 ..D4 R822..F4 C03..B3 C405 ..G4...

  • Page 31: Svc. Sheet

    All manuals and user guides at all-guides.com SVC. SHEET : 3854V A0083A-S SVC. SHE...
  • Page 32 All manuals and user guides at all-guides.com Dec.,2003 P/NO : 3828VD0107N Printed in Korea...

This manual is also suitable for:

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