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COLOR TV
SERVICE MANUAL
CHASSIS : MC-019A
MODEL : RF/RT-21FB20R/RE/RQ/RX/RW
MODEL :
RF/RT-21FB20V/VE/VG/VQ/VW
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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Table of Contents
Related Manuals for LG RF-21FB20R
Summary of Contents for LG RF-21FB20R
- 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-21FB20R/RE/RQ/RX/RW MODEL : RF/RT-21FB20V/VE/VG/VQ/VW CAUTION BEFORE SERVICING THE CHASSIS, READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
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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.
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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) -
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 RF/RT-21FA30/31/32 series 1. MAIN POWER (ON/OFF) switches the set on or off. 2. POWER/STANDBY INDICATOR MENU OK ON/OFF illuminates brightly when the set is in standby mode. 9 10 dims when the set is switched on. CF/CT-21Q20K/21K/22K series blinks when signal is input from the remote control.
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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 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 Marker LG Innotek(W/S TUNER) DAEWOO(W/S TUNER) AGC Voltage 2.7¡ 0.05V 2.7¡ 0.05V Tuner P/N 6700VPF009S BLO-R Marker...
- 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.
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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 8. Referring to above, perform the following two steps: 6. Reconnect the internal degaussing coil and apply AC power. a. Adjust the yoke Z-axis to obtain equal blue circles. b. Adjust the appropriate beam bender tabs to obtain correct 7.
- Page 16 All manuals and user guides at all-guides.com UP/DOWN ROCKING OF THE YOKE LEFT/RIGHT ROCKING OF THE YOKE CAUSES OPPOSITE ROTATION OF RED CAUSES OPPOSITE SIZE CHANGE OF THE AND BLUE RASTERS RED AND BLUE RASTERS 12. While watching the 6 o'clock positions on the screen, rock the 17.
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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
J 5 ? J @ ? ? 3 L 7 Y O & @ ? ? V 1 @ @ @ @ @ @ @ @ @ 6410VEH001G POWER CORD 3091V00439B CABINET ASSY LG FLAT 5020V00657A BUTTON,CONTROL 320-062E SPRING,KNOB 5020V00656A... -
Page 20: 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 21 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 22 100UF STD 16V M FL TP5 C829 0CF1021047A 1000PF D 800V 5% TP 7.5 M/PP N P01A 366-932B CONNECTOR,2.5MM 3P GIL-G LG CABLE S C830 0CE475DK618 4.7UF STD 50V 20% FL TP 5 P02A 366-932B CONNECTOR,2.5MM 3P GIL-G LG CABLE S...
- 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 25 220 OHM 1/2 W 5.00% TA52 RC801 180-822N RWR 7W 1.0 OHM J PD SWITCH SW1101 140-313A SWITCH,TACT 2LEAD 100G(TA) LG C&D NON SW1102 140-313A SWITCH,TACT 2LEAD 100G(TA) LG C&D NON SW1103 140-313A SWITCH,TACT 2LEAD 100G(TA) LG C&D NON SW1104 140-313A SWITCH,TACT 2LEAD 100G(TA) LG C&D NON...
- Page 26 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 27 All manuals and user guides at all-guides.com P/NO:3854VA0083A-S 2001.04.20...
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Page 28: Svc. Sheet
All manuals and user guides at all-guides.com SVC. SHEET : 3854V A0083A-S SVC. SHE... - Page 29 All manuals and user guides at all-guides.com Jan,2004 P/NO : 3828VD0126C Printed in Korea...