LG CF-20T22Kx Service Manual
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LG CF-20T22Kx Service Manual

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P/NO : 3828VD0104L
All manuals and user guides at all-guides.com
Sep.,2001
Printed in Korea
e-mail:http://www.LGEservice.com/techsup.html
COLOR TV
SERVICE MANUAL
CHASSIS : MC-019A
MODEL : CF-20/21S11KEX
MODEL :
CF-20/21T20K/20T22KX
MODEL :
CF-20K51KEX
MODEL :
CF-20/21F60K/KX
CAUTION
BEFORE SERVICING THE CHASSIS,
READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
ALGORITHM
NATVRAL
EYE
website:http://biz.LGservice.com

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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 : CF-20/21S11KEX MODEL : CF-20/21T20K/20T22KX MODEL : CF-20K51KEX MODEL : CF-20/21F60K/KX CAUTION BEFORE SERVICING THE CHASSIS, READ THE SAFETY PRECAUTIONS IN THIS MANUAL. Sep.,2001 NATVRAL ALGORITHM...

  • 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 Exploded View Parts List ................19 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 : 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) ¡...

  • 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 OK F F VOL G G E E PR D D §...

  • 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. X=288¡ 8, Y=295¡ X=272¡ 8, 11,000K) 5) Press the OK(¡Æ) button to memorize the data. Status Initial Data Remark Tuner P/N 6700VPF009G 6700VPF016A LG Innotek(W/S TUNER) Marker DAEWOO(W/S TUNER) AGC Voltage 2.7¡ 0.05V 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 Option Part ST-BY IIC Bus Line INPUT ¡Ü TRANS MNT Audio Out(Mono) (110~240V) TV Audio Out (CL Mono) (3W Opt) SPK. SPK. IC651 R.G.B AMP. & LA7016(Mono Opt) TV Audio(From UOC #28) CPT DRIVE / Game Audio (From HIC01) AUDIO B+ 15 18...

  • Page 18: Exploded View

    All manuals and user guides at all-guides.com EXPLODED VIEW : 20/21S11KEX - 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 20" 21" 343-B52A 343-B52A SUPPORTER,PCB 112-C20S 112-C21G CPT SET 120-D38F 120-D38F SPEAKER 150-D02Y...
  • Page 20 All manuals and user guides at all-guides.com EXPLODED VIEW : 20/21T20KX OPTION - 20 -...
  • Page 21 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 20" 21" 112-C20S 112-C21G CPT SET 120-C93G 120-C93G SPEAKER 6400VA0019C 6400VA0019C SPEAKER 150-D02Y...
  • Page 22 All manuals and user guides at all-guides.com EXPLODED VIEW : 20K51KEX - 22 -...
  • Page 23 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. LOCA. NO PART NO DESCRIPTIONS 343-B52A SUPPORTER,PCB 112-C20S CPT SET A48ECR141X(S/S, DARK W/ITC LGE 120-C77G SPEAKER,FULLRANGE C122P02K1459 8 OHM 1 150-D02Y COIL,DEGAUSSING CU 20Ó...
  • Page 24 All manuals and user guides at all-guides.com EXPLODED VIEW : 20/21F60KX OPTION - 24 -...
  • Page 25 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 20" 21" 343-B52A 343-B52A SUPPORTER,PCB 112-C20S 112-C21G CPT SET 120-C93G 120-C93G SPEAKER,GENERAL 150-D02Y...

  • Page 26: 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 ZD501 0DZ820009BF DIODE,ZENER GDZJ8.2B TP GRANDE DO34 0.5W ZD601 0DZ910009BD DIODE,ZENER GDZJ9.1B TP GRANDE DO34 0.5W...
  • Page 27 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 28 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 29 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 30 DESCRIPTION LOCA. NO PART NO DESCRIPTION R628 0RD0331H609 3.3 OHM 1/2 W 5.00% TA52 SW06 140-315A SWITCH,TACT SKHV17910B LG C&D NON 12V R631 0RD1302F609 13K OHM 1/6 W 5.00% TA52 SW801 6600VM2002A SWITCH,PUSH SDKEA3 IEC 250V 8A HORIZO R632 0RD1000F609 100 OHM 1/6 W 5.00% TA52...
  • Page 31 All manuals and user guides at all-guides.com P/NO:3854VA0083B-S 2001.04.20...
  • Page 32 All manuals and user guides at all-guides.com PRINTED CIRCUIT BOARD WIRING DIAGRAM COMPONENT LOCATION GUIDE MAIN & CPT 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...

  • Page 33: Svc. Sheet

    All manuals and user guides at all-guides.com SVC. SHEET : 3854V A0083A-S SVC. SHE...

This manual is also suitable for:

Cf-20t20kCf-20s11kexCf-21t20kCf-20k51kexCf-20f60kCf-21f60k ... Show all

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