Table of Contents
P/NO : 3828VD0087G
March,2002
Printed in Korea
e-mail:http://www.LGEservice.com/techsup.html
COLOR TV
SERVICE MANUAL
CHASSIS : MC-019A
MODEL : CF/CT-21Q21KE/KEX/KX/22KEX
MODEL :
CT-51F82/51F92T
MODEL :
CT-21Q60EX/21Q92EX
MODEL :
CT-21Q61KE/62KE/21Q91KE
CAUTION
BEFORE SERVICING THE CHASSIS,
READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
website:http://biz.LGservice.com
Table of Contents
Related Manuals for LG CT-21Q61KE
Summary of Contents for LG CT-21Q61KE
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Page 1: Service Manual
COLOR TV SERVICE MANUAL CHASSIS : MC-019A MODEL : CF/CT-21Q21KE/KEX/KX/22KEX MODEL : CT-51F82/51F92T MODEL : CT-21Q60EX/21Q92EX MODEL : CT-21Q61KE/62KE/21Q91KE CAUTION BEFORE SERVICING THE CHASSIS, READ THE SAFETY PRECAUTIONS IN THIS MANUAL. March,2002 P/NO : 3828VD0087G Printed in Korea... -
Page 2: Table Of Contents
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
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
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. incidence of component damage caused by static by static NOTE: If unforeseen circumstances create conflict between the electricity. - Page 5 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. Clip each fuse or resistor lead at top of the circuit board component lead and the foil.
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Page 6: Specifications
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) Power requirement : 110~240V, 50/60Hz VISION IF : 38.9MHz COLOR IF : 34.47MHz(4.43) -
Page 7: Description Of Controls
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 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. Q.VIEW returns to the previously viewed programme. selects a favorite programme. POWER MUTE 13.
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Page 9: Accepts Your Selection Or Displays The Current Mode
Front panel RF/RT-21FA30/31/32 series CF/CT-21Q64K/65K/66K series TV/AV VIDEO AUDIO ON/OFF MENU OK ON/OFF 9 10 1 2 3 6 7 9 10 CF/CT-21Q20K/21K/22K series CF/CT-21Q60K/61K/62K series TV/AV ON/OFF TV/AV VIDEO AUDIO ON/OFF 10 9 6 7 8 1 2 3 CF/CT-15Q90K/91K/92K series CF/CT-21Q90K/91K/92K series (Side panel) -
Page 10: Disassembly Instructions
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
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. W/O EYE 2. -
Page 12: Screen Voltage Adjustment
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 2.7! 0.05V AGC Voltage 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.
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Page 14: Purity & Convergence Adjustment
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 magnets) at the 12 o'clock position. - Page 15 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. Reconnect the internal degaussing coil and apply AC power. a.
- Page 16 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 CAUSES OPPOSITE ROTATION OF RED CAUSES OPPOSITE SIZE CHANGE OF...
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Page 17: Block Diagram
BLOCK DIAGRAM - 17 -... -
Page 18: Exploded View
EXPLODED VIEW : 21Q21/22 OPTION - 18 -... -
Page 19: Exploded View Parts List
The components identified by mark critical for safety. EXPLODED VIEW PARTS LIST Replace only with part number specified. LOCA. NO PART NO DESCRIPTIONS 6341V21009B CPT ASSY,A51QDX991X 6335V21008D 120-D38C SPEAKER,MID-RANGE 8 OHM 15/25W 4810V00123A BRACKET,CASE 4810V00124A BRACKET,COVER 150-D02X COIL,DEGAUSSING CU 21” 60TURN 12 OHM 6150V-1014G DY,DIF-2192AA(NF5) 170-A01N... - Page 20 EXPLODED VIEW : 21Q61/62 OPTION - 20 -...
- Page 21 The components identified by mark critical for safety. EXPLODED VIEW PARTS LIST Replace only with part number specified. LOCA. NO PART NO DESCRIPTIONS 6341V21009A CPT ASSY,A51QDX991X 21” S/S FLAT 120-D38C SPEAKER,MID-RANGE 8 OHM 15/25W 87 4810V00123A BRACKET,CASE 4810V00124A BRACKET,COVER 150-D02X COIL,DEGAUSSING CU 21”...
- Page 22 EXPLODED VIEW : 21Q91/92 OPTION - 22 -...
- Page 23 The components identified by mark critical for safety. EXPLODED VIEW PARTS LIST Replace only with part number specified. LOCA. NO PART NO DESCRIPTIONS 6341V21009A CPT ASSY,A51QDX991X 21” S/S FLAT 120-D38C SPEAKER,MID-RANGE 8 OHM 15/25W 87 6400VG0002A SPEAKER,TWEETER T0520101 8 OHM 10 4810V00267A BRACKET,SPK 4810V00124A...
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Page 24: Replacement Parts List
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 ZD601 0DZ910009BD DIODE,ZENER GDZJ9.1B TP GRANDE DO34 0.5W ZD901 0DZ750009BE DIODE,ZENER GDZJ7.5B TP GRANDE DO34 0.5W IC01 0ICTMPH005A IC,TD9381PS/N2/3,L8011(ARAB) W/O TXT... - Page 25 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. digit in the P/No. means as CE : Electrolytic RN : Metal Film Replace only with part number specified.
- Page 26 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. means as CE : Electrolytic RN : Metal Film Replace only with part number specified.
- Page 27 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. digit in the P/No. means as CE : Electrolytic RN : Metal Film Replace only with part number specified.
- Page 28 0RD1000F609 100 OHM 1/6 W 5.00% TA52 3828VA0262F MANUAL,OWNERS LG AR/EN R908 0RD1000F609 100 OHM 1/6 W 5.00% TA52 3828VA0262G MANUAL,OWNERS IN/REG NO.LG IN/EN 070 R909 0RS1501H609 1.5K OHM 1/2 W 5.00% TA52 6710V00070A REMOTE CONTROLLER W/TXT R910 0RS1501H609 1.5K OHM 1/2 W 5.00% TA52...
- Page 29 P/NO:3854VA0083A-S 2001.04.20...
- Page 30 PRINTED CIRCUIT BOARD...
- Page 31 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 C612..B3 C813 ..D2 F801B ..G1 LD01..F1 R07..B3...
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Page 32: Svc. Sheet
SVC. SHEET : 3854V A0083A-S SVC. SHE...