Summary of Contents for LG CT-21Q41KE
- Page 1 COLOR TV SERVICE MANUAL CHASSIS : MC-019A MODEL : CT-21Q41KE/KEX/42KEX CAUTION BEFORE SERVICING THE CHASSIS, READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
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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
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) ● Intermediate Frequency (Unit : MHz) ●... -
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. I/II/ (option) selects the language during dual language broadcast. (option) selects the sound output. POWER MUTE 13.
- Page 9 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)
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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. - Page 12 X=288±8, Y=295±X=272±8, 11,000K) 5) Press the OK(■) button to memorize the data. Status Initial Data Remark Tuner P/N 6700VPF009G 6700VPF016A Marker LG Innotek(W/S TUNER) DAEWOO(W/S TUNER) 2.7± 0.05V AGC Voltage 2.7± 0.05V Tuner P/N 6700VPF009S BLO-R LG Innotek(TBS TUNER) 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
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 - 18 -... -
Page 19: Exploded View Parts List
BUTTON,CONTROL 6KEY 320-062E SPRING,KNOB 5020V00391A BUTTON,POWER 1KEY 3809V00213F BACK COVER ASSY 3809V00213G BACK COVER ASSY *M.E.C 3809V00213H BACK COVER ASSEMBLY CT-21Q41KE NON NON 3210V00043A FRAME,MAIN 3210V00043B FRAME,MAIN *M.E.C 3210V00043F FRAME,CT-21Q41KE SFSLSB2 . 019A C/SKD 6871VMMA41M PCB ASSY,MAIN 019A CT-21Q41KE.KMXLRA8(S 6871VMMA35G... -
Page 20: Replacement Parts List
The components identified by mark REPLACEMENT PARTS LIST critical for safety. Replace only with part number specified. LOCA. NO PART NO DESCRIPTION LOCA. NO PART NO DESCRIPTION ZD501 0DZ820009BF DIODE,ZENER GDZJ8.2B ZD601 0DZ910009BD DIODE,ZENER GDZJ9.1B HIC01 0IZZVF0017C IC,BK GAME MODULE ZD901 0DZ750009BE DIODE,ZENER GDZJ7.5B... - Page 21 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 22 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 23 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 24 ACCESSORIES R804 0RD4701F609 4.7K OHM 1/6 W 5.00% TA52 R805 180-A01P 0.13 OHM 2 W 5% TA62 RWR 3828VA0262F MANUAL,OWNERS MC019A LG AR/EN 061D/G TX R806 0RD2401F609 2.4K OHM 1/6 W 5.00% TA52 6710V00061G REMOTE CONTROLLER,MC-019A R808 0RD4701F609 4.7K OHM 1/6 W 5.00% TA52...
- Page 25 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 R555 ..D4 R822..F4 C03..B3 C405 ..G4...
- Page 26 P/NO:3854VA0083A-S 2001.04.20...
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Page 27: Svc. Sheet
SVC. SHEET : 3854V A0083A-S SVC. SHE... - Page 28 Dec,2003 P/NO : 3828VD0087P Printed in Korea...