website:http://biz.LGservice.com e-mail:http://www.LGEservice.com/techsup.html COLOR TV SERVICE MANUAL CHASSIS : MC-049B MODEL:RT-21FA35R/RX/V/VX MODEL:RT-21FA315EX/PX CAUTION BEFORE SERVICING THE CHASSIS, READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
CONTENTS Contents ...................................................................................................................2 Safety Precautions..............................................................................................3 Control Descriptions..........................................................................................4 Specifications........................................................................................................7 Adjustment Instructions ......
SAFETY PRECAUTIONS IMPORTANT SAFETY NOTICE Many electrical and mechanical parts in this chassis have special safety-related characteristics. These parts are identified by in 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. Do not modify the original design without permission of manufacturer.
DESCRIPTION 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. POWER MUTE 1 11 2 1 2 3 4 5 6 7 8 9 0 TV/AV PICTURE MENU SOUND 10 OK T U R B O Before you use the remote control handset, please install the batteries. See the next page. 1. POWER switches the set on from standby or off to standby. 12 3 2.
13. I/II/ (option) selects the language during dual language broadcast. (option) selects the sound output. * POWER 14. LIST displays the programme table. MUTE 11 1 15. SLEEP sets the sleep timer. 1 2 3 4 5 6 7 8 9 MENU/INDEX 0 TV/AV 2 16. SSM/ (option) (Sound Status Memory) recalls your preferred sound setting. * º/ ) (option) 17. SURROUND (º selects surround sound. * 3 18. VCR BUTTONS control a LG video cassette recorder. 12 TV 4 19.
Front panel RF/RT-21FA35 series 1. MAIN POWER (ON/OFF) switches the set on or off. MENU OK VOL PR ON/OFF 2. POWER/STANDBY INDICATOR illuminates brightly when the set is in standby mode. dims when the set is switched on. blinks when signal is input from the remote control. L/MONO 2 4 1 2 3 5 RF/RT-21FB25 series 7 6 AV2 MENU VOL OK PR ON/OFF 7 1 2 3 4 5 8 4. MENU selects a menu. 8 5. OK accepts your selection or displays the current mode. F / G (Volume Up/Down) adjusts the volume.
SPECIFICATIONS Note : Specification and others are subject to change without notice for improvement. F Scope This specification can be applied to all the television related to MC-049B Chassis. F Requirement for Test Testing for standard of each par must be followed in below condition 1) Temperature : 20 ± 5¡C (CST must be tested 40 ± 5¡C .
ADJUSTMENT INSTRUCTIONS 1. Application Object 4. Purity & Convergence adjustment These instructions are applied to all of the color TV, MC-049B. CPT Assembling As preparatory operations before assembling CPT, wind cotton Tape for protecting to CPT NECK and DY, CPT connection parts. At this moment, end of tape should be over-lapped and wound in direct route to the NECK. Assembling DY to CPT Fix the Magnet to the position as shown picture below. Be careful not to make CPT neck shadow while adjusting DY.
(4) Maintain as angle of (3) and rotate the tab to accord with vertical line of Red and Blue color in the middle of screen. (5) Open angle of the two tab of 6 pole magnet by isogonic angle and accord with vertical line of Red/Blue and Green. (6) Maintain as angle of (5) and rotate the tab to accord with horizontal line. In case of twisted horizontal line,repeat adjustment of (3) ~ (5) remembering the movement of Red/Green/Blue color.
(4) VS (Vertical Shift) adjustment: Adjust so that the geometric vertical center line is in accord with vertical center line of CPT. (5) HS(Horizontal Shift) adjustment: Adjust so that the geometric horizontal center line is in accord with horizontal center line of CPT. 8-4.
8-6.
TROUBLE SHOOTING RF- STEREO MODEL PICTURE O.
No Ras ter ( 2/ 2) CHECK B+ At D829 c at ho d e No rm al Ab no rm al Is t he vo lt ag e a t eac h p in vo lag e o f IC11 NO Chec k & Rep lac e IC11 NO Chec k & Rep lac e Q40 2 NO Chec k & Rep lac e T40 1 NO Chec k & Rep lac e Q40 1 Chec k p in 60 Of IC1 1( H - Out ) Yes Op en Chec k Fuse o f AC line Chec k t he In/ o ut o f reg ulat o r ( IC8 21, IC822 IC82 3, IC824 IC82 5) Chec k / Rep lac e Fuse OK Chec k / Rep lac e DB801 OK Chec k Q40 2 Co llec to r wavef o rm NO Chec k t he Vo lta g e Of
NO Pic t ure / No So und Is Any OSD d isp la yed ? OK OK Chec k IC11 p in71, 7 2, 73 ( R, G, B o ut ) Chec k rec eiving syst em in MENU & exec ut e Aut o - Pro g ram . OK Do es t he auto - Pro g ra m Op erat e p ro p erly NO OK Sto re o n m anual- p ro g ram MENU Chec k p in40( V o ut 1) 1 Vp - p NO Chec k 1 . 8V , 3. 3 V, 5 V DC Vo ltag e Chec k p in18 Reset Vo lta g e 3.3 V DC NO NO Chec k SMPS Trans Sec o nd ary Vo ltag e Chec k IC13 ( Reset IC) OK Chec k p in57, 58 SCL, SDA 3.
AV STERRO / MONO MODEL Selec t c o rrec t syst em In m enu OK OK Chec k t he c o nnec t io n Of AV eq uip m ent AV Chec k t he wavef o rm At p in16, 17 o f IC11 OK NO Chec k TU1 01 Tuner OK NO Chec k t he vo lt ag e Of p in2 , 19, 20, 21, 2 4 o f IC11 Chec k t he wavef o rm At p in4 , 5 o f IC11 OK NO Chec k t he wavef o rm At p in2 , 4 o f IC601 Chec k t he sig na l line o f SPK- L, R OK NO Chec k t he wavef o rm At p in6 o f IC601 Chec k p in 55 ( m ut e) o f IC11 OK Chec k t he wavef o rm A
PRINTED CIRCUIT BOARD MAIN - 16 -
COMPONENT LOCATION GUIDE ffdf C10 ........C4 C11 ........C4 C12 ........C4 C13 ........C3 C14.........F1 C16 ........C2 C21.........E1 C22.........B2 C23.........A4 C24.........A3 C25.........B4 C101.......A5 C102.......F1 C103 ......C1 C104.......A5 C105.......A5 C106.......B4 C107.......B5 C108.......B5 C109.......B4 C110.......B4 C111.......A5 C126.......A4 C185 ......C1 C201 ......D5 C202 ......D5 C203 ......C5 C204 ......C5 C205.......E5 C206 ......C5 C207.......B5 C209.......B5 C210.......E5 C211 ..
PIP - 18 -
VS PIP-VIDEO PIP-RGB - 19 - TUNER ( TU101) IIC GAME HIC ( HIC01) RESET H-FLB VIDEO/AUDIO SCART RGB-IN AV-IN TV / MONITOR OUT AV-OUT ( JK202) * SCART/ PHONE/ DVD SAW FILTER ( Z101) VCT49* * MICOM( IC 11 ) ON / OFF IIC AUDIO-OUT H-FLB 5V PIP_BOARD ( SDA9489X ) DATA/CLOCK 33V 5V S-Vc c AUDIO AMP ( IC601) H-OUT H-Vc c VB VA 5V 3. 3V ST-1. 8V ST-3. 3V ST-5V ST-5V 190V H-DRIVE ( Q401 ) S-Vc c 6.
EXPLODED VIEW 943 913 170 150 400 153 112 P801 570 120 121 300 520 315 330 320 315 - 20 -
The components identified by mark critical for safety. Replace only with part number specified. EXPLODED VIEW PARTS LIST is LOCA. No. PART No. 112 6334V21009A CPT, A51QDJ420X 01 16KHZ BARE AK MASK (CASA-S, AMATIS) 6335V21019A CPT, A51QDJ420X 01MDDR M(+0.30G) 0G RT-21FA35V.LDLLAT7(LGEAK) 6341V21012A BARE CPT ASSEMBLY, LG 21 AK CPT 6334V21009A(6150V-1014J) RT-21FA35RX.
REPLACEMENT PARTS LIST For Capacitor & Resistors, the charactors at 2nd and 3rd digit in the P/No. means as follows; LOCA. NO CC, CX, CK, CN : Ceramic CQ : Polyestor CE : Electrolytic PART NO RD : Carbon Film RS : Metal Oxide Film RN : Metal Film RF : Fusible DESCRIPTION LOCA.
For Capacitor & Resistors, the charactors at 2nd and 3rd digit in the P/No. means as follows; LOCA. NO PART NO DESCRIPTION LOCA. NO PART NO CC, CX, CK, CN : Ceramic CQ : Polyestor CE : Electrolytic RD : Carbon Film RS : Metal Oxide Film RN : Metal Film RF : Fusible DESCRIPTION C211 0CN4710K519 470P 50V K B TA52 C521 0CN1040K949 0.1UF D 50V 80%,-20% F(Y5V) TA52 C214 0CN4710K519 470P 50V K B TA52 C523 0CN1040K949 0.
For Capacitor & Resistors, the charactors at 2nd and 3rd digit in the P/No. means as follows; CC, CX, CK, CN : Ceramic CQ : Polyestor CE : Electrolytic LOCA. NO PART NO C806 0CK10201515 C807 181-091X C809 RD : Carbon Film RS : Metal Oxide Film RN : Metal Film RF : Fusible DESCRIPTION LOCA. NO PART NO 1000P 1KV K B TS L504 0LA0101K119 INDUCTOR,1.0UH K 2.3*3.4 TP R 560PF 2KV 10%,-10% R/TP TP7.5 L505 0LA0102K119 INDUCTOR,10UH K 2.3*3.
For Capacitor & Resistors, the charactors at 2nd and 3rd digit in the P/No. means as follows; LOCA. NO PART NO DESCRIPTION LOCA. NO PART NO CC, CX, CK, CN : Ceramic CQ : Polyestor CE : Electrolytic RD : Carbon Film RS : Metal Oxide Film RN : Metal Film RF : Fusible DESCRIPTION R302 0RN3602F409 36K OHM 1/6 W 1.00% TA52 R524 0RD1000F609 100 OHM 1/6 W 5% TA52 R303 0RD2400A609 240 OHM 1/2 W(7.0) 5.00% TA52 R526 0RD1201F609 1.2K OHM 1/6 W 5% TA52 R304 0RD0561A609 5.6 OHM 1/2 W(7.0) 5.
For Capacitor & Resistors, the charactors at 2nd and 3rd digit in the P/No. means as follows; CC, CX, CK, CN : Ceramic CQ : Polyestor CE : Electrolytic LOCA. NO PART NO R817 0RD0152F609 R823 0RD4701F609 R827 0RD1001F609 R828 RD : Carbon Film RS : Metal Oxide Film RN : Metal Film RF : Fusible DESCRIPTION LOCA. NO PART NO 15 OHM 1/6 W 5.00% TA52 SK901 6620VBC003A SOCKET (CIRC),CPTPCS030A 8PIN 14/360 4.7K OHM 1/6 W 5% TA52 T402 6174V-6006M FBT,BSC25-N1648 21 YY .
P/NO: 3854VA0162A - S1 2004.6.
SVC.
P/NO : 3828VD0188H Sep.