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P/NO : 3828VD0078L
May,2001
Printed in Korea
COLOR TV
SERVICE MANUAL
CHASSIS : MC-00AA
MODEL : CE-20/21F66X CE-20/21K40/46EX/48ET
MODEL :
CE-20/21F86X CE-21T26EX/28ET
MODEL :
CE-21S15EX/21S18ET
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 CE-20F66X
Summary of Contents for LG CE-20F66X
- Page 1 website:http://biz.LGservice.com e-mail:http://www.LGEservice.com/techsup.html COLOR TV SERVICE MANUAL CHASSIS : MC-00AA MODEL : CE-20/21F66X CE-20/21K40/46EX/48ET MODEL : CE-20/21F86X CE-21T26EX/28ET MODEL : CE-21S15EX/21S18ET CAUTION BEFORE SERVICING THE CHASSIS, READ THE SAFETY PRECAUTIONS IN THIS MANUAL. May,2001 P/NO : 3828VD0078L Printed in Korea...
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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 Exploded View ....................18 Exploded View Parts List ................19 Replacement Parts List ................28 SVC. -
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: SOUND IF : 33.4MHz (B/G) PAL-B/G, D/K, I/I 32.9MHz (I/I) SECAM-B/G, D/K/L/L’ 32.4MHz (D/K,L) NTSC M 34.4MHz (M) 40.4MHz (L’) ¡ Intermediate Frequency (Unit : MHz) VISION IF : 38.9MHz,33.9MHz(SECAM-L’) COLOR IF : 34.47MHz(4.43) ¡... -
Page 7: Description Of Controls
PLAY These buttons are used for teletext. For further details, see the ‘Teletext’ section. P/STILL STOP 8. VCR BUTTONS (option) control a LG video cassette recorder. 9. MUTE switches the sound on or off. With TELETEXT 10. TV/AV selects TV or AV mode. - Page 8 11. ARC (Aspect Ratio Control) changes the picture format. 12. SURROUND ( ) (option) º selects surround sound. 13. Q. VIEW returns to the previously viewed programme. 14. LIST MUTE POWER displays the programme table. I/II/ 15. SSM/ (Sound Status Memory) (option) recalls your preferred sound setting.
- Page 9 Front panel Shown is a simplified representation of front panel. Here shown may be somewhat different from your set. Mono models POWER OK F F VOL G G E E PR D D § § MENU VIDEO AUDIO POWER MENU OK F F VOL G G E E PR D D §...
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Page 10: Disassembly Instructions
DISASSEMBLY INSTRUCTIONS Chassis Assy Removal Important note Grasp both side of Frame and pull it backward smoothly. This set is disconnected from the power supply through the converter transformer. An isolating transformer is necessary for service operations on the primary side of the converter transformer. -
Page 11: Adjustment
6700VPF005D Tuner P/N 2. Never disconnect leads while the TV receiver is on. 3. Don't short any portion of circuits while power is on. LG Innotek LG Innotek Marker 4. The adjustment must be done by the correct appliances. But this is changeable in view of productivity. - Page 12 located within the effective screen of the CPT. SC (Vertical “S” Correction) Adjust so that all distance between each horizontal lines are to be the same. VS (Vertical Shift) Adjust so that the horizontal center line of a digital circle pattern is in accord with geometric horizontal center of the CPT.
- Page 13 ¡ OPTION Adjustment (SVC MODE:OPTION-1, OPTION-2) Option Code Function Remark EUROPE STANDARD VOL CURVE NOTE: When the EEPROM has been replaced, the Option data should be restored as the function of individual system and specification. TURBO P/S OFF T P/S TURBO P/S ON 1) Press OK buttons on both TV set and Remote Controller at the same time to get into SVC mode.
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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...
- Page 17 MEMO - 17 -...
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Page 18: Exploded View
EXPLODED VIEW:20/21F66X P801 OPTION - 18 -... -
Page 19: Exploded View Parts List
112-C20S 112-C21G CPT SET 6400VA0019A 6400VA0019A SPEAKER,GENERAL G9050401 8 OHM 5/ 150-D02Y 150-D02X COIL,DEGAUSSING 170-A01D 170-A01D LEAD SET,CPT EARTH 3091V00205B 3091V00206B CABINET ASSY,LG SILVER 5020V00181C 5020V00174E BUTTON,CONTROL 320-070U 320-070U SPRING,COIL 5020V00182B 5020V00175B BUTTON,POWER 3809V00153B 3809V00153B BACK COVER ASSY(SCART) 3141VMN679J 3141VMN679H... - Page 20 EXPLODED VIEW:21F86X P801 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 343-B52A SUPPORTER,PCB 112-C21G CPT SET,A51EER131X73 LGENE LOCAL 2055-00691K CPT SET,A51QAE320X LGEMK 6400VA0019A SPEAKER,GENERAL G9050401 8 OHM 5/ 150-D02X COIL,DEGAUSSING CU 21”...
- Page 22 EXPLODED VIEW:21T26EX/21T28ET P801 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 112-C21G CPT SET,A51EER131X73 LGENE LOCAL 6400VA0019C SPEAKER,GENERAL G9050403 16 OHM 6400VA0019A SPEAKER,GENERAL G9050401 150-D02X COIL,DEGAUSSING CU 21” 60T 12 OHM 170-A01D LEAD SET,CPT EARTH(19”) 3091V00202H...
- Page 24 EXPLODED VIEW:20/21K46EX/21K48ET P801 OPTION - 24 -...
- Page 25 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 2055-V1221B 6400VA0021A 6400VA0021A SPEAKER,GENERAL G1150301 8 OHM 150-D02Y 150-D02X COIL,DEGAUSSING 170-A01D 170-A01D LEAD SET,CPT EARTH 3091V00293L...
- Page 26 EXPLODED VIEW:21S15EX/21S18ET P801 OPTION - 26 -...
- Page 27 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-C21G CPT SET,A51EER131X73 LGENE LOCAL 120-D38F SPEAKER,C131P01-044K14 8 OHM 150-D02X COIL,DEGAUSSING CU 21” 60TURN 12 OHM D02N (NYL 170-A01D LEAD SET,CPT EARTH(19”) 3106V00057P...
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Page 28: 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 D804 0DD420000BB DIODE,D4L20U D805 0DD420000BB DIODE,D4L20U IC01 0ICTMIH005A IC,SDA5555-A007 D806 0DD100009AM DIODE,RECTIFIER EU1ZV(1) TP IC02 0IAL241600B IC,AT24C16-10PC 8D EEPROM 16K... - Page 29 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 30 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 31 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.