Table of Contents
Related Manuals for LG 21FB7RB/RG
Summary of Contents for LG 21FB7RB/RG
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Page 1: Service Manual
COLOR TV SERVICE MANUAL CHASSIS : MC-059A MODEL: 21FB7RB/RG MODEL: 21FB7RB/RG-TD CAUTION BEFORE SERVICING THE CHASSIS, READ THE SAFETY PRECAUTIONS IN THIS MANUAL. -
Page 2: Table Of Contents
CONTENTS www.eclub2007.com CONTENTS ......................2 www.eclub2007.com SAFETY PRECAUTIONS..................3 DESCRIPTION OF CONTROLS...............4 SPECIFICATIONS ....................7 ADJUSTMENT......................9 PRINTED CIRCUIT BOARD ................14 BLOCK DIAGRAM ....................17 EXPLODED VIEW....................22 EXPLODED VIEW PARTS LIST..............23 REPLACEMENT PARTS LIST ............... 24 www.eclub2007.com www.eclub2007.com - 2 -... -
Page 3: Www.eclub2007.Com
SAFETY PRECAUTIONS IMPORT ANT SAFETY NOTICE www.eclub2007.com 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: Description Of Controls
DESCRIPTION OF CONTROLS www.eclub2007.com 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. www.eclub2007.com Remote control handset Before you use the remote control handset, please install the bat- teries. - Page 5 www.eclub2007.com 10. MUTE switches the sound on or off. 11. TV/AV selects TV or AV mode. www.eclub2007.com 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 6 www.eclub2007.com Front panel 17/21FB7 series 1. MAIN POWER (ON/OFF) www.eclub2007.com switches the set on or off. 2. POWER/STANDBY INDICATOR illuminates brightly when the set is in standby mode. dims when the set is switched on. 3. REMOTE CONTROL SENSOR Note : Only use the supplied remote control handset.
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Page 7: Specifications
SPECIFICATIONS Note : Specification and others are subject to change without notice for improvement. Scope 4) Specification and performance of each parts are followed www.eclub2007.com each drawing and specification by part number in This specification can be applied to all the television related to accordance with BOM. - Page 8 Rear Earphone Front Local Key Power, Vol( ), PR( ), MENU, OK 7EA/ Front www.eclub2007.com Remocon LG Code (NEC) Channel Auto prog. System/ Storage/ Normal/ Turbo Manual Storage/ System/ Channel/ Fine/ Search/ Name Prog. edit Copy/ Move/ Delete/ Skip Favorite...
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Page 9: Adjustment
- Measurement Range : 10mV-100mVdc/ Accuracy : 0.03% 3-2. Adjustment Preparation <Fig. 1> 1) Input LG standard signal into 75Ω antenna terminal (or 3) Make the full screen Red by pulling DY back slowly. PAL-B/G 05CH) (When adhering DY, use the electric driver of which 2) Connect the digital multi-meter to terminal(with Hole/ turning force is lower than 10Kg/Cm) <Fig. -
Page 10: White Balance Adjustment
4) Rotate the 4-Pole magnets keeping the angle between 6. White Balance Adjustment two 4-Pole magnets until horizontal Red and Blue lines are unified. (1) Necessary Instrument 5) Open two 6-Pole magnets until vertical Red and Green 1) Auto White Balance Meter(Can generate Low/High light lines are unified. - Page 11 10. Instrument setting data (auto adjustment) <TABLE 2> VIDEO IC EEPROM Speed Delay SLave ADD www.eclub2007.com B(R)AMP B(R)CUT G(B)AMP G(B)CUT B AMP B CUT G AMP G CUT Sub Add Start Bit www.eclub2007.com Stop Bit <Fig. 3> Masking Direction EEPROM Sub Add 8.
- Page 12 <TABLE 1> Initial setting Remark Menu Adjustment Range RF AGC RF AGC Delay 0 ~ 63 Necessary VP 0 0 ~ 31 Necessary VP 1 H POS H PHASE www.eclub2007.com Necessary VP 2 V POS V Shift (V POSI) 0 ~ 15 V SIZE Vertical Size 0 ~ 127...
- Page 13 Menu Adjustment Range Initial setting Remark VP 53 TINT TH Tint Through 0 / 1 Unnecessary 0 ~ 3 Unnecessary VP 54 Y TH Y TH VP 55 Y GAIN Y Gain 0 ~ 3 Unnecessary www.eclub2007.com R WIDTH R width 0 ~ 3 Unnecessary VP 56...
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Page 14: Printed Circuit Board
PRINTED CIRCUIT BOARD MAIN www.eclub2007.com www.eclub2007.com www.eclub2007.com www.eclub2007.com - 14 -... - Page 15 COMPONENT LOCATION GUIDE C5 ..C5 C304..F4 C582 ..C5 C732..E4 D405 ..D5 L212 ..C5 Q402 ..G4 R281 ..D5 R536 ..C3 R873 ..D2 C11 ..C4 C305..F4 C601..B2 C740..B3 D501 ..D4 L213 ..C5 Q403 ..E5 R301..E4 R537..B4 R883 ..D2 C12 ..C3 C306..E4 C602..B2 C741..B3 D502 ..D4 L216 ..C1...
- Page 16 SIDE A/V www.eclub2007.com www.eclub2007.com CONTROL www.eclub2007.com www.eclub2007.com - 16 -...
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Page 17: Block Diagram
BLOCK DIAGRAM www.eclub2007.com www.eclub2007.com www.eclub2007.com www.eclub2007.com - 17 -... - Page 18 1. TV FUNCTIONAL www.eclub2007.com www.eclub2007.com 2. TU / IF SECTION 3. VIDEO PROCESSING In case of influx NOISE - R/C is not operate www.eclub2007.com Maneuver defectiveness Maneuver defectiveness Maneuver defectiveness www.eclub2007.com - 18 -...
- Page 19 4. SMPS PRIMARY SECTION www.eclub2007.com www.eclub2007.com 5. SMPS SECONDARY SECTION www.eclub2007.com www.eclub2007.com - 19 -...
- Page 20 6. VERTICAL SECTION www.eclub2007.com www.eclub2007.com 7. HORIZONTAL SECTION www.eclub2007.com www.eclub2007.com - 20 -...
- Page 21 8. SOUND PROCESSING SECTION www.eclub2007.com www.eclub2007.com 9. CPT DRIVE SECTION www.eclub2007.com www.eclub2007.com - 21 -...
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Page 22: Exploded View
EXPLODED VIEW www.eclub2007.com www.eclub2007.com P801 www.eclub2007.com www.eclub2007.com - 22 -... -
Page 23: Exploded View Parts List
Replace only with part number specified. LOCA. NO PARTS No. DESCRIPTIONS www.eclub2007.com 6334V21009B CPT, A51QDJ420X(G) LG-PHILIPS DISPLAYS 16KHZ BARE AK MASK 120-C77M SPEAKER,FULLRANGE C122P02K1459 8 OHM 10/15W 130DB 57*117MM www.eclub2007.com 6400VF5001B SPEAKER,MID-RANGE LG FOSTER 16 OHM 5/7W 83DB 126X57MM 4810V00088A... -
Page 24: Replacement Parts List
REPLACEMENT PARTS LIST www.eclub2007.com For Capacitor & Resistors, the CC, CX, CK, CN : Ceramic RD : Carbon Film charactors at 2nd and 3rd digit CQ : Polyestor RS : Metal Oxide Film in the P/No. means as follows; CE : Electrolytic RN : Metal Film RF : Fusible www.eclub2007.com... - Page 25 For Capacitor & Resistors, CC, CX, CK, CN : Ceramic RD : Carbon Film the charactors at 2nd and 3rd CQ : Polyestor RS : Metal Oxide Film www.eclub2007.com digit in the P/No. means as CE : Electrolytic RN : Metal Film follows;...
- Page 26 For Capacitor & Resistors, CC, CX, CK, CN : Ceramic RD : Carbon Film the charactors at 2nd and 3rd CQ : Polyestor RS : Metal Oxide Film www.eclub2007.com digit in the P/No. means as CE : Electrolytic RN : Metal Film follows;...
- Page 27 For Capacitor & Resistors, CC, CX, CK, CN : Ceramic RD : Carbon Film the charactors at 2nd and 3rd CQ : Polyestor RS : Metal Oxide Film www.eclub2007.com digit in the P/No. means as CE : Electrolytic RN : Metal Film follows;...
- Page 28 www.eclub2007.com LOCA. NO PART NO DESCRIPTION LOCA. NO PART NO DESCRIPTION R905 0RD4300F609 430 OHM 1/6 W 5.00% TA52 6710V00124D REMOTE CONTROLLER, MC049B W/O TXT www.eclub2007.com R905 0RD4300F609 430 OHM 1/6 W 5.00% TA52 MISCELLANEOUS R906 0RD1000F609 100 OHM 1/6 W 5% TA52 R906 0RD1000F609 100 OHM 1/6 W 5% TA52...
- Page 29 www.eclub2007.com www.eclub2007.com www.eclub2007.com www.eclub2007.com P/No : 3854VA0196A 2005.05.26...
- Page 30 www.eclub2007.com www.eclub2007.com SVC. SHEET : 3854V A0196A-S www.eclub2007.com www.eclub2007.com...
- Page 31 www.eclub2007.com www.eclub2007.com Jun., 2005 P/NO : 3828VD0215J Printed in Korea www.eclub2007.com www.eclub2007.com...