website:http://biz.LGservice.com e-mail:http://www.LGEservice.com/techsup.html COLOR TV SERVICE MANUAL CHASSIS : MC-022A MODEL:CT-25/29M60RE/RX MODEL:CT-25/29M60VE/VQ CAUTION BEFORE SERVICING THE CHASSIS, READ THE SAFETY PRECAUTIONS IN THIS MANUAL. P/NO : 3828VD0118J Dec.
CONTENTS Contents ................................................................................................................. 2 Safety Precautions ............................................................................................3 Specifications ..................................................................................................... 4 Control Descriptions ........................................................................................ 5 Disassembly 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.
SPECIFICATIONS Note : Specification and others are subject to change without notice for improvement. O O O Video input system: PAL-B/G, D/K, I/I SECAM-B/G, D/K/L/L’ NTSC M NTSC 4.43(AV) NTSC- M/PAL M-N SOUND IF : Intermediate Frequency (Unit : MHz) VISION IF : 38.9MHz,33.9MHz(SECAM-L’) COLOR IF : 34.47MHz(4.43) 35.32MHz(3.58) : NTSC-M VIF-4.25000MHz ( ): SECAM VIF-4.40625MHz 33.4MHz (B/G) 32.9MHz (I/I) 32.4MHz (D/K,L) 34.4MHz (M) 40.
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 11 1 Before you use the remote control handset, please install the batteries. See the next page. 1 2 3 4 5 6 7 8 9 ARC 0 TV/AV 2 1. POWER switches the set on from standby or off to standby. 12 3 SOUND MENU PICTURE 4 ( ) PR 5 VOL VOL 2.
14. OK accepts your selection or displays the current mode. 15. LIST displays the programme table. POWER MUTE 11 1 16. EYE/ (option) switches the eye function on or off. * 17. SLEEP sets the sleep timer. 2 18. Q.VIEW returns to the previously viewed programme. selects a favorite programme. 3 1 2 3 4 5 6 7 8 9 ARC 0 TV/AV PICTURE MENU 12 SOUND 4 13 OK T U R B O 19. PIP BUTTONS (option) PIP switches the sub picture on or off. PR +/selects a programme for the sub picture.
Front panel CT-25/29Q20 series 11 RT-29FA33 series ON/OFF MENU OK VOL PR MENU S-VIDEO VIDEO L/MONO AUDIO R 12 OK VOL PR ON/OFF 1 34 26 5 23 4 1 10 6 5 1112 10 AV3 CT-25/29Q40 series 11 MENU ON/OFF VOL PR VOL RT-28FZ10 series MENU OK OK VOL PR ON/OFF S-VIDEO VIDEO L/MONO AUDIO R 12 1 3 5 4 26 10 1 26 34 5 AV3 1. MAIN POWER 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.
DISASSEMBLY INSTRUCTIONS Important note Chassis Assy Removal 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. Grasp both side of Frame and pull it backward smoothly. Back Cabinet Removal Remove the screws residing on the back cabinet and carefully separate the back cabinet from the front cabinet. (Fig. 2-1). CPT Removal PICTURE TUBE HANDLING CAUTION 1.
ADJUSTMENT INSTRUCTIONS 1. Safety Precautions 5. Screen Voltage & White Balance Adjustment 1. It is safe to adjust after using insulating transformer between the power supply line and chassis input to prevent the risk of electric shock and protect the instrument. 2. Never disconnect leads while the TV receiver is on. 3. Don't short any portion of circuits while power is on. 4. The adjustment must be done by the correct appliances. 5. Unless otherwise noted, set the line voltage to 230Vac!10%, 50Hz. 6.
6. Deflection Data Adjustment (Line SVC-2) NOTE : How to enter into the Line Service Mode with a remocon. EW (Horizontal Width) Adjust to that a digital circle pattern looks like exact circle. 1.Power off. 2.Press the Red button. 3.Press the Green button. 4.Press the Yellow button. 5.Press the Cyan button. 6.Press the OK button. 7.Power On. 6-1. Preparation for Deflection Adjustment 1) At adjustment mode(IN-START button on remote control of adjustment),changed to LINE SVC 2 mode to adjust the deflection.
25/29” LG FLAT CPT(CT-25Q20RB) 29” S/S SEB FLAT CPT ITEM RANGE N50Hz W50Hz Z50Hz ITEM RANGE N50Hz W50Hz Z50Hz VA 0050~00CF 009A 22 11 VA 0050~00CF 00A3 -22 11 VL 0025~00BF 00F3 3 0 VL 0025~00BF 00F5 0 0 SC 0000~009F 00D0 0 0 SC 0000~009F 00D0 0 0 VS 0600~0900 0774 0 0 VS 0600~0900 0744 0 0 HS 0000~003F 0019 0 0 HS 0000~003F 0016 0 0 EW 0400~0EFF 0B96 22 0 EW 0400~0EFF 0E40 0 0 ET 0700~08FF 07DE 0 0 ET 0700~08FF 07E9 0 0 EP 06
16: 9 ITEM 14: 9 ZOOM STANDARD RANGE 50Hz 60Hz 50Hz 60Hz 50Hz 60Hz 50Hz 60Hz VA 0050~00CF 0083 0083 008F 008E 00A7 00A7 0083 0084 VL 0025~00BF 00FD 00FA 00FD 00A 00FD 00F8 00FD 00F9 7. SVC Data & PSM,SSM Data.
8-3. OPTION 1 Function Option WIDE TOP ACMS CH+AU EYE DEG TILT KEY Code 8-5.
8-7. OPTION 4 Function OPTION FUNTION CODE 0 English Only(Eng.) Arab.Asia 1 Arab(Eng/Fr/Arab) 3834 2 Urdu(Eng/Fr/Arab/Urdu) 3 Asia(Eng/Fr/Indonesia) 0 English Only(Eng.) Farsi 1 Arab(Eng/Fr/Arab) 3834 2 Farsi(Eng/Fr/Arab/Farsi) OSD 0 English Only(Eng.) Arab-Asia LANG. 1 Arab(Eng/Fr/Arab) 3804 2 Urdu(Eng/Fr/Arab/Urdu) 3 Arab all(Eng/Fr/Arab/Urdu/Farsi) 4 Farsi ONly(Eng/Farsi) 5 Asia(Eng/Fr/Indonesia/Malay) 0 English Only(Eng.) WEST-EU 1 EU-7(E.
OPTION TXT-L FUNTION CODE 0 WEST-EU Farsi only 1 EAST-EU 3834 only(W/TXT) 2 Turkey 3 Cyrillic3 5 Arab/English 8 Farsi/English 0 WEST-EU Arab-Asia 1 EAST-EU 3834 only(W/TXT) 2 Turkey 3 Cyrillic3 5 Arab/English 0 WEST-EU WEST EU 1 EAST-EU 3834 only(W/TXT) 2 Turkey 6 Cyrillic3 0 WEST-EU EAST EU 1 EAST-EU 3834 only(W/TXT) 2 Turkey 6 Cyrillic3 0 WEST-EU 28” WIDE FLAT 1 EAST-EU 3834 only(W/TXT) 2 Turkey 4 Cyrillic3 5 Arab/English 6 Farsi/English - 15
- 16 - ICP101 Y&C AV -3 AV -2 AV -1 PIP &A/V SW ICP01 IC661 MSP-34xxG L/R RGB & FB SCART-1 RGB & FB SDASDA9489X PIP Processor V- SYNC H- SYNC I 2C Bus Ik DVD Y, Pb,Pr 8 H-Sinc H-Out ST-2310 IC03 AT24C16 EEPROM LA-7845 Tilt Control Vetical Deflection IC301 Tilt Controller VA V-Out T402 H-Out R G B AMP (6107)JF TDA 6109 TO TILT COIL V-DY FBT VMVM-COIL H -DY TO Cathode 0f CPT MAIN SPEAKER L R IC901 Horizontal Deflection IC401 EW VM R/G/B TDA-2066 (Mono Opt.
- 17 - 12 110V(Flat) 120V (Normal) 18 33V 16 17V 14 Sound Vcc (35V OPT.) 8V T802 12V 11 SMPS TRANS ST-BY TRANS 28V(FBT) Relay 9V ST 5V Tilt(Opt.) 5V FBT H-DRIVE 5V EW AMP 278R05 LD3.3V LA 7845(V-AMP) KA78A09 12V 78L05 ¡ 14V(FBT) T803 VM Tuner (Main) IC01 VCT3834 LD3.3V 7805 12V 200V(FBT) Tuner (Sub) EYE(Opt.
TROUBLE SHOOTING RF- STEREO Selected correct system In menu OK NO Check the waveform At pin 17 of TU101 Check / Replace TU 101 OK NO Check the waveform At pin 24,25 of IC661 Check The Voltage At pin 16,33,46, of IC661 NO Check The voltage At pin of IC610, IC853 OK NO Check the waveform At pin 4,12 of IC602 NO Check / Replace Q671, 672 NO Check / Replace Q621, IC603 NO Check / Replace F851, D862 Check / Replace IC610, IC853 OK Check the Voltage At pin 6, 7 of IC602 OK Check the waveform
NO RASTER CHECK B+ At D807 cathode Normal Abnormal Is the voltage at Pin 25, 54 of IC01 3.
No Picture / No Sound Is any OSD displayed? OK No OK Check receiving system in MENU & execute Auto - Program. Check IC01 pin37,42,43,44 (IK, R,G,B) No OK Does the auto - Program Operate properly. OK Check / Replace IC01 Store on manual - program MENU Check 5V, 33V & IIC Bus Line No Check 5V, 33V & IIC Bus Line Of Tuner. OK Check / Replace IC01, Tuner No Is the CVBS signal OK.
AV Stereo Select correct system In menu OK OK Check the connection Of AV equipment AV NO Check the the waveform At pin47 of IC661 OK Check TU101 Tuner OK NO Check the waveform At pin 24, 25, of IC661 Check the voltage Of pin16,20 OK NO Check waveform At pin 4, 12 of IC602 Check / Replace IC602 OK NO Check the voltage At pin6,7 of IC602 Check / Replace Q621, IC603 OK Check the waveform At pin 1,2,14,15 of IC602 NO Check the vpltage At pin3, 13 of IC602 OK Replace IC 602 - 21 - NO Chec
EXPLODED VIEW 943 913 150 400 170 112 P801 520 120 310 501 550 104 540 600 330 320 601 300 700 - 22 -
The components identified by mark critical for safety. Replace only with part number specified. EXPLODED VIEW PARTS LIST is Part No. No.
REPLACEMENT PARTS LIST LOCA. NO PART NO DESCRIPTION LOCA. NO IC PART NO DESCRIPTION D862 0DD420000BB DIODE, D4L20U SHINDENGEN D863 0DS141489AB DIODE,SWITCHING 1N4148 TP GRANDE - 20V IC01 0ICTMMN004B VCT3834B LG24 W/EU MICRONAS 64P ST TXT MICOM D864 0DS141489AB DIODE,SWITCHING 1N4148 TP GRANDE - 20V “ 0ICTMMN006B VCT3834B LG28 MIDDLE ASIA D866 0DR400009AB DIODE,RECTIFIERS RU4JGF 600V 3.
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.
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. NO PART NO DESCRIPTION L241 0LA0102K119 INDUCTOR, 10UH K 2.3*3.4 TP J137 0RD1000F609 100 OHM 1/6 W 5% TA52 L242 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 R186 0RD4701F609 4.7K OHM 1/6 W 5% TA52 R404 0RD0332H609 33 OHM 1/2 W 5.00% TA52 R187 0RD1801F609 1.8K OHM 1/6 W 5.
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. NO PART NO DESCRIPTION R604 0RD3301F609 3.3K OHM 1/6 W 5.00% TA52 R607 0RS0681H609 6.8 OHM 1/2 W 5.00% TA52 R608 0RD3301F609 3.3K OHM 1/6 W 5.00% TA52 SW1101 140-315A SWITCH,TACT SKHV17910B LG C&D NON 12V R609 0RD6201F609 6.
SVC. SHEET : 3854VA0098A-S SVC.
PRINTED CIRCUIT BOARD MAIN CONTROL P/N: 3854VA0098A-S(2/2) DATE: 2002.03.25 COMPONENT LOCATION GUIDE C01 ..........B4 C02 ..........B4 C03 ..........B4 C04 ..........B4 C06 ..........E1 C07 ..........B4 C08 ..........B4 C10 ..........B3 C11 ..........B3 C14 ..........B4 C16 ..........B4 C17 ..........B4 C22 ..........B4 C23 ..........C4 C24 ..........C4 C25 ..........C4 C27 ..........B4 C28 ..........C4 C29 ..........B4 C30 ..........C1 C102 ........A5 C103 ........A5 C104 ........A5 C105 ........
P/NO:3854VA0098A-S(1/2) 2002.03.
website:http://biz.LGservice.com e-mail:http://www.LGEservice.com/techsup.html COLOR TV SERVICE MANUAL CHASSIS : MC-022A MODEL:CT-25/29M60RE/RX MODEL:CT-25/29M60VE/VQ CAUTION BEFORE SERVICING THE CHASSIS, READ THE SAFETY PRECAUTIONS IN THIS MANUAL. P/NO : 3828VD0118J Dec.