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website:http://biz.LGservice.com
e-mail:http://www.LGEservice.com/techsup.html
COLOR TV
SERVICE MANUAL
CHASSIS : MC-049A
MODEL:CT-29M65VE
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........................................................................................................6 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 Remote control handset 11 1 1 2 3 Before you use the remote control handset, please install the bat- teries. See the next page. 4 5 6 2 1. POWER 7 8 9 switches the set on from standby or off to standby. ARC 0 TV/AV 2. NUMBER BUTTONS 12 3 switches the set on from standby or directly select a number. MENU SOUND
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15. LIST displays the programme table. 16. EYE/ (option) POWER * MUTE switches the eye function on or off. 11 1 17. SLEEP 1 2 3 sets the sleep timer. 4 5 6 18. Q.VIEW 2 returns to the previously viewed programme. 7 8 9 ARC TV/AV 0 19. FAVOURITE 12 3 selects a favorite programme. MENU SOUND PICTURE 4 13 20. PIP BUTTONS (option) OK T U R B O PIP 14 switches the sub picture on or off. PR PR +/- VOL VOL 5 selects a programme for the sub picture. PR SWAP REW PLAY FF alternates between main an
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SPECIFICATIONS Note : Specification and others are subject to change without notice for improvement. F Scope F Test Condition This specification can be applied to all the television related to 1) Temperature :20 ± 5°C(CST : 40 ± 5°C) MC-049A Chassis. 2) Relative Humidity:65 ± 10% 3) Use the parts only designated in B.O.M.,PARTS SPEC.,or drawings. Chassis Market Brand Standard input Voltage 4) Follow each drawing or spec for spec and performance of MC049A Middle East, Africa LG 110-240Vac, 50/60
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ADJUSTMENT INSTRUCTIONS 1. Application Object 4. Purity & Convergence adjustment These instructions are applied to all of the color TV, MC-049A. 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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(5) Open angle of the two tab of 6 pole magnet by isogonic 2. White balance IIC Parameter angle and accord with vertical line of Red/Blue and Green. Program TWBeng2.0 Program TWBeng2.0 Speed Delay (6) Maintain as angle of (5) and rotate the tab to accord with Vcd Slave 24C16 Eprom_Slave AE 1 30 horizontal line. In case of twisted horizontal line,repeat adjustment of (3) ~ (5) remembering the movement of Red/Green/Blue color. R_Amp R_Cut B_Amp B_Cut (7) Move the DY to best condition of convergenc
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N60Hz(NTSC) N50Hz(PAL) Menu Variable range 29” 29” VS 4 10 -512~511 VA 80 70 -512~511 VL -70 -70 -512~511 SC 140 140 -512~511 HS 110 130 32~2047 EW -70 -69 -256~255 ET -12 -15 -512~511 PAL Digital pattern (EU05CH) EP -80 -78 -512~511 ANGLE -512~511 0 0 (4) VS (Vertical Shift) adjustment: Adjust so that the geometric vertical center line is in accord BOW -512~511 0 0 with vertical center line of CPT. UPCOR -512~511 8 8 (5) HS(Horizontal Shift) adjustment: Adjust so that the geometric hori
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8-4. OPTION2 Function Option Code Function TSEARCH 0 Without TURBO SEARCH 1 With TURBO SEARCH 200PR 0 100 PROGRAM SAVE 1 200 PROGRAM SAVE EYE 0 Without EYE 1 With EYE TX019 0 1 8KEY 0 1 8KEY 4KEY 0 1 4KEY 8-5. OPTION3 Function Option Code Function REMARK SYSTEM 0 1 ACMS 0 Without ACMS Function 1 With ACMS Function TOP 0 FLOT TXT 1 TOP TXT CH+AU 0 Without D/K CHINA or BB SYSTEM 1 With D/K CHINA or BB SYSTEM China, Australia HDEV 0 1 - 10 -
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TROUBLE SHOOTING RF- STEREO Selected correct system In menu OK NO Check the waveform Check / Replace IF 1 of TU101 TU 101 OK NO NO Check the waveform Check The Voltage 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 NO Check the Voltage Check / Replace Q601 At pin 6 of IC601 OK Check the waveform At pin 8, 9, 11, 12 of IC601 OK NO Check the Voltage Check / Re
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NO RASTER CHECK B+ At D829 cathode Normal Abnormal Open Is the voltage at Check each pin voltage of IC11 Fuse of AC line No Yes Check / Replace Ok Fuse Check the In/out of No Check pin 60 Check the Voltage No regulator Of IC11(H - Out) Of C803 (IC821, IC822 Check & IC823, IC824 Ok 140 ~ 310V Yes Replace Check / Replace IC825) IC11 DB801 Check Q402 Check the Voltage No Collector waveform Pin 4 of IC801 No Check & Ok 18 ~ 20V Yes Check / Replace Replace Fuse IC801 Q402 Check / Repla
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No Picture / No Sound Is any OSD displayed? OK No OK OK Check receiving system in MENU Check IC11 pin71,72,73 & execute Auto - Program. (R,G,B out) Does the auto - Program Operate properly. No OK Store on manual - program MENU No Go to No Check SMPS Trans Check 1.8V, 3.3V, Check pin40(V out 1) No Sound / Secondary Voltage 5V DC Voltage 1V p-p Picture OK OK No Check pin18 Check IC13 Reset Voltage (Reset IC) OK 3.3V DC No Check IC12(EEPROM) Check pin57, 58 No SCL, SDA & SCL, SDA, Line OK 3.3V
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AV Stereo Select correct system In menu OK OK Check the connection Of AV equipment NO Check the the waveform AV Check TU101 Tuner At pin16, 17 of IC11 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 signal line of Check waveform SPK-L,R At pin 2, 4 of IC601 OK NO Check pin 55 (mute) Check the voltage of IC11 At pin6 of IC601 OK NO NO Check the vpltage Check /Replace Check the waveform At pin7, 5 of IC601 D828, D805, F806 At pin 8
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PRINTED CIRCUIT BOARD MAIN - 15 -
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SIDE A/V CONTROL POWER - 16 -
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BLOCK DIAGRAM - 17 - [ Power ] [ Power ] Tilt(Opt.) EYE(Opt.) PRE-AMP 9V 14V ST 5V LED IC824 ST-3.3V 78S06 EEPROM IC853 IC825 SMPS ICP02 TRANS ST-1.8V SDA- 9489X 3.3V 11 14V 14V (PIP Processor) ICP01 Relay LA7222 PIP & 14V 3.3V T802 AV SW (Audio Switc h) IC821 IC602 (OPT.) IC822 5V 12 78R05 6.5V 17V L LA A4 42 21 15 52 2 VCT49XYI IIC C6 60 01 1 5V S So ou un nd d A AM MP P IC11 17V 13 14V(FBT) LA 7845 (V-AMP) Sound V cc 5V 28V(FBT) EW AMP Tuner Tuner 16 33V H-DRIVE (Main) (Sub) TDA6109 IC901
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- 18 - L/ R SPKR-L ( ( ( ( PR+ PR- VOL+ VOL- OK Menu LA42071 H/ P SPKR-R LA42072 3 ( ( SIF LA42152 ( ( LA7222 GAME MODULE CPT/ VM CLK TDA6109 PRESET KEY SAW IR STICK M MA AIIN N VIDEO AUDIO VS S SU UB B IFIN+ EHT VER. Va IFIN- SW1 Vb TDA4863 RGB AIN1 L/ R out HS SVM AIN2 L/ R out AIN3 L/ R Hfb VCTi HOR./ EW Hout V V1 1 49xxl V V2 2 AUDIO AOUT1 V V3 3 T 1/2 VOU VIDEO Y Y3 3 P PIIP P V VIID DE EO O C C3 3 R RIIN N R R// P Pr r G GIIN N G G// Y Y B BIIN N SVCC B B//P Pb b +110V Video P PO OW WE ER
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MEMO - 19 -
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