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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.
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CONTENTS Contents...................................................................................................................2 Safety Precautions..............................................................................................3 Control Descriptions..........................................................................................4 Specifications........................................................................................................7 Adjustment Instructi
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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. Before returning the r
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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 Remote control handset 1 2 3 4 5 6 Before you use the remote control handset, please install the bat- teries. See the next page. 2 7 8 9 1. POWER 0 TV/AV switches the set on from standby or off to standby. 12 MENU SOUND PICTURE 2. NUMBER BUTTONS 10 3 switches the set on from standby or directly select a nu
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Q.VIEW Q.VIEW I / II / 13. I/II/ (option) * selects the language during dual language broadcast. (option) selects the sound output. POWER MUTE 14. LIST 1 11 displays the programme table. 12 3 15. SLEEP sets the sleep timer. 45 6 2 16. SSM/ (option) (Sound Status Memory) * recalls your preferred sound setting. 78 9 ¼ ¼ 17. SURROUND ( / ) (option) * MENU/INDEX 0 TV/AV selects surround sound. 3 12 18. VCR BUTTONS TV control a LG video cassette recorder. 4 13 19. PIP BUTTONS (option) ( ) PR PIP
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L AUDIO R VIDEO VIDEO L AUDIO R Front panel RF/RT-21FA35 series 1. MAIN POWER (ON/OFF) switches the set on or off. MENU OK VOL PR ON/OFF L/MONO 2 2. POWER/STANDBY INDICATOR illuminates brightly when the set is in standby mode. 1 2 3 4 7 5 6 dims when the set is switched on. RF/RT-21FB25 series blinks when signal is input from the remote MENU VOL control. ON/OFF OK PR 7 3. REMOTE CONTROL SENSOR 4. MENU 1 2 3 4 5 8 selects a menu. 6 RF/RT-15/21FB55 series 5. OK VIDEO L AUDIO R accepts your selec
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SPECIFICATIONS Note : Specification and others are subject to change without notice for improvement. F Scope F Requirement for Test This specification can be applied to all the television related to Testing for standard of each par must be followed in below MC-049B Chassis. condition 1) Temperature : 20 ± 5¡C F Test and Inspection Method (CST must be tested 40 ± 5¡C . Humidity : 50%) 1) Capacity : Follow LG electronics TV testing Standard. 2) Relative Humidity : 65 ± 10% 2) Another Required Sta
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ADJUSTMENT INSTRUCTIONS 1. Application Object 4. Purity & Convergence adjustment These instructions are applied to all of the color TV, MC-049B. As preparatory operations before CPT Assembling assembling CPT, wind cotton Tape for protecting to CPT NECK and DY, CPT 2. Notes connection parts. At this moment, end (1) Because this is not a hot chassis, it is not necessary to use of tape should be over-lapped and an isolation transformer. However, the use of isolation wound in direct route to the NEC
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(4) Maintain as angle of (3) and rotate the tab to accord with 2. White balance IIC Parameter vertical line of Red and Blue color in the middle of screen. Program TWBeng_v049 Program TWBeng_v049 Speed Delay (5) Open angle of the two tab of 6 pole magnet by isogonic Vcd Slave BCF0 Eprom_Slave AE 1 30 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 R_Amp R_Cut B_Amp
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(4) VS (Vertical Shift) adjustment: 8-4. OPTION2 Function Adjust so that the geometric vertical center line is in accord Option Code Function with vertical center line of CPT. (5) HS(Horizontal Shift) adjustment: 0 Without A/V2 AV2 Adjust so that the geometric horizontal center line is in 1 With AV2 accord with horizontal center line of CPT. 0 Without DVD DVD
Initial deflection setting data 1 With DVD N60Hz(NTSC) N50Hz(PAL) 0 Without SCART1 SCART1 Menu Variable range FLAT 21Ó FLAT 21Ó
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8-6. OPTION4 Function Option Code Function OSD L 0 ENG ONLY 1 EU-5EA 2 EU ETC 3 GREECE 4 EU-ALL 5 FARSI 6 ARAB URDU 7 E+HINDI 8 E+I+M+V 9 E+THAI 10 E+CHINA TXT L 0 WEST EU 1 EAST EU1 2 TURKEY EU 3 EAST EU2 4 CYRILLIC1 5 CYRILLIC2 6 CYRILLIC3 7 TURK GRE1 8 TURK GRE2 9 TURK GRE3 10 ARAB FRA 11 ARAB ENG 12 ARAB HEB1 13 ARAB HEB2 14 FARS ENG 15 FARS FA 16 FARS ALL 17 AUTO HOTEL 0 WITHOUT HDEV 1 WITH HDEV MAX V 0~ SETTING VOL MAX 100 - 11 -
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TROUBLE SHOOTING RF- STEREO MODEL PICTURE O.K / NO SOUND Selected correct system In m enu OK Check the waveform NO Check / Replace IF 1 of TU101 TU 101 OK Check the waveform NO Check The Voltage NO Check The voltage At pin 4, 5 of IC11 At pin 2, 19, 20, 21, 24 of IIC11 At pin of IC821, IC822, Q807 OK NO Check the waveform Check / Replace At pin 2, 4 of IC601 C821, IC822, Q807 OK Check the waveform NO Check / Replace Q601 At pin 6 of IC601 OK Check the waveform At pin 8, 9, 11, 12 of IC601 OK
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No Raster (2/ 2) CHECK B+ At D829 cathode Normal Abnormal Open Is the voltage at Check each pin volage of IC11 Fuse of AC line Check / Replace OK Check the Fuse In/ out of Check pin 60 NO regulator NO Of IC11(H Out) - Check the Voltage (IC821, IC822 Of C803 IC823, IC824 Check & Yes IC825) Replace Check / Replace IC11 OK DB801 Check Q402 NO Collector waveform NO Check the Voltage Pin 4 OF IC801 Check & Yes Replace Q402 Check / Replace OK 18~20V Check T401 Fuse IC801 NO & each pin voltage Check
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NO Picture No Sound / Is Any OSD displayed? O OK K OK OK Check IC11 pin71, 72, 73 Check receiving system in MENU & execute Auto Program . (R, G, B out) - Does the auto -Program Operate properly NO OK Store on m anual - program MENU Go to NO NO Check pin40(V out 1) Check 1.8V, 3. 3V, Check SMPS Trans No Sound / 1Vp p 5V DC Voltage Secondary Voltage - Picture OK NO Check pin18 Check IC13 Reset Voltage (Reset IC) 3.3V DC OK NO Check pin57, 58 Check IC12(EEPROM) NO SCL, SDA & SCL, SDA Line 3.3V DC O
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AV STERRO / MONO MODEL Select correct system In m enu OK OK Check the connection Of AV equipm ent AV Check the wavef orm NO At pin16, 17 of IC11 Check TU101 Tuner OK OK NO Check the voltage Check the waveform Of pin2, 19, 20, 21, 24 of IC11 At pin4, 5 of IC11 OK NO Check the waveform Check the signal line of At pin2, 4 of IC601 SPK- L, R OK NO Check the waveform Check pin 55(m ute) At pin6 of IC601 of IC11 OK NO NO Check the waveform Check thev pltage Check/ Replace At pin8, 9, 11, 12 of IC601
