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website:http://biz.LGservice.com
e-mail:http://www.LGEservice.com/techsup.html
COLOR TV
SERVICE MANUAL
CHASSIS : MC-007A
MODEL:CT-25/29Q47E/P/EN/EX
MODEL:CT-25/29Q46EN CF-29F84
CAUTION
BEFORE SERVICING THE CHASSIS,
READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
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CONTENTS Contents ................................................................................................................. 2 Safety Precautions ............................................................................................3 Specifications ..................................................................................................... 4 Control Descriptions ........................................................................................ 5 Disassembly Instructio
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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. General Guidance Befor
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SPECIFICATIONS Note : Specification and others are subject to change without notice for improvement. ¡ Video input system: SOUND IF : 33.4MHz (B/G) PAL-B/G, D/K, I/I 32.9MHz (I/I) SECAM-B/G, D/K/L/LÕ 32.4MHz (D/K,L) NTSC M 34.4MHz (M) NTSC 4.43(AV) 40.4MHz (LÕ) ¡ Intermediate Frequency (Unit : MHz) VISION IF : 38.9MHz,33.9MHz(SECAM-LÕ) ¡ Power requirement : 110~240V, 50/60Hz COLOR IF : 34.47MHz(4.43) 35.32MHz(3.58) : NTSC-M ¡ Power consumption : 25Ó:125W VIF-4.25000MHz 29Ó:135W ( ): SECAM
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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 Remote control handset MUTE 10 1 Before you use the remote control handset, please install the bat- ARC 1 2 3 11 teries. See the next page. TV/AV 2 4 5 6 12 1. POWER SOUND switches the set on from standby or off to standby. 7 8 9 13 MENU PICTURE 0 2. NUMBER BUTTONS TURBO 3 switches the set on from standby or direct
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14. LIST displays the programme table. 15. I/II selects the language during dual language broadcast (option). selects the sound output. 16. PIP BUTTONS (option) PIP switches the sub picture on or off. POWER PR +/- MUTE selects a programme for the sub picture. 10 1 SWAP alternates between main and sub picture. 1 2 3 INPUT selects the input mode for the sub picture. 4 5 6 2 SIZE adjusts the sub picture size. 7 8 9 STILL TV/AV MENU freezes motion of the sub picture. 0 12 3 POSITION relocates
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1 3 4 2 6 5 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. 3. MENU 8 selects a menu. 4. OK accepts your selection or displays the current mode. VIDEO F / G (Volume Up/Down) adjusts the volume. 7 adjusts menu settings. L MONO AUDIO (Programme Up/Down) D / E R selects a programme or a menu item. switches the set on from standby. 5. EYE adjusts picture according to the surrounding conditi
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DISASSEMBLY INSTRUCTIONS Important note Chassis Assy Removal This set is disconnected from the power supply through the Grasp both side of Frame and pull it backward smoothly. converter transformer. An isolating transformer is necessary for service operations on the primary side of the converter transformer. Speaker Assy Removal 1. Remove P1651 and P1652 connector from Main2 (Power/Def./ Sound-Amp) Board. Back Cabinet Removal 2. Remove respective 6 screws for speaker on the front Remove the scre
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ADJUSTMENT INSTRUCTIONS ¡ Safety Precautions ¡ LÕ VCO Adjustment (For SECAM-LÕ MODEL) 1. It is safe to adjust after using insulating transformer between the power supply line and chassis input to prevent the risk of Test Point : TP1 electric shock and protect the instrument. 2. Never disconnect leads while the TV receiver is on. Adjust : VR122 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 li
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EP (East west Parabolar) Adjust so that middle portion of the outermost left and right vertical line looks like parallel with vertical lines of the CPT. A B EC (East-west Coner) Adjust so that the vertical line at every 4 corners of the screen looks like parallel with the vertical lines of the CPT. ET (East-west Trapezium) Adjust to make the length of top horizontal line same with it of the bottom horizontal line. POP (POP Position) Fig. 2 b Adjust until the distance between POP and main picture
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Menu Range DATA CR 0 ~ 511 50 CG 0 ~ 511 50 CB 0 ~ 511 50 RG 0 ~ 511 370 GG 0 ~ 511 370 BG 0 ~ 511 370 (Table 3) ¡ SVC Data & PSM,SSM Data. Table 1. ABL Data (LINE SVC-3) Menu Range 29Ó Flat 29Ó S-Flat DVCO IBRM 0~1FFH 00C8 WDRM 0~3FFH 0190 BCLTH 0~7FFH 0065 BCLTM 0~1FFH 000B BCLGA 0~1FFH 0007 SVGA 0008 SVDEL 0005 SVD1 0003 LDLY 0001 HBST 0~01FF 00F0 HBSO 0~01FF 0158 Table 2. SOUND PRE-SCALER (LINE SVC-4) Menu Range DATA FP 0~127 0011 NP 0~127 0045 SP 0~127 001E S1 VOL 0~127 0042 S2 VOL 0~127
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¡ OPTION Adjustment (LINE-SERVICE OPTION) Table 4. OPTION Function 1 0 Menu OPTION GAME X GAME X TEXT TEXT X TOP TOP Australia Only ACMS Option 1 CH+AU China,Australia EYE EYE X TURBO Turbo Search X SCART SCART X A2 ST STEREO X I II SV I/II X MONO MONO X VOL Middle East Africa,India VOL. Normal VOL. Option 2 H-PH H/Phone DGS Degaussing X TILT TILT 200PRO China Only X AV2 Back:JACK(2EA) Back:JACK(1EA) HOTEL HOTEL X Option 3 KEY SYS M-VOL OSD Option 4 T-LAN - 12 -
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MEMO - 13 -
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EXPLODED VIEW 943 400 913 150 153 510 170 112 P801 540 550 530 520 501 300 560 120 570 600 310 121 320 330 700 - 14 -
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Replace only with part number specified. EXPLODED VIEW PARTS LIST Part No. No. Description 25" 29" 112 2426GE259AJ 2426GF239AR CPT SET 120 6400VA0027A 6400VA0027A SPEAKER,GENERAL H165/051800A 8 OHM 10/1 121 3110V00073A 3110V00073A CASE,SPEAKER 150 150-D05Z 6140VC2005F COIL,DEGAUSSING 153 6150Z-1230F 6150Z-1240A DY
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The components identified by mark are critical for safety. Replace only with part number specified. REPLACEMENT PARTS LIST LOCA. NO PART NO DESCRIPTION LOCA. NO PART NO DESCRIPTION D412 0DD414809ED DIODE,1N4148 TA IC D601 0DD414809ED DIODE,1N4148 TA D850 0ISK100300A IC,SLA1003 SIP12 BK DIODE
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For Capacitor & Resistors, CC, CX, CK, CN : Ceramic RD : Carbon Film The components identified by mark are the charactors at 2nd and 3rd CQ : Polyestor RS : Metal Oxide Film critical for safety. digit in the P/No. means as CE : Electrolytic RN : Metal Film Replace only with part number specified. follows; RF : Fusible LOCA. NO PART NO DESCRIPTION LOCA. NO PART NO DESCRIPTION ZD901 0DZ180009BE
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For Capacitor & Resistors, CC, CX, CK, CN : Ceramic RD : Carbon Film The components identified by mark are the charactors at 2nd and 3rd CQ : Polyestor RS : Metal Oxide Film critical for safety. digit in the P/No. means as CE : Electrolytic RN : Metal Film Replace only with part number specified. follows; RF : Fusible LOCA. NO PART NO DESCRIPTION LOCA. NO PART NO DESCRIPTION C109 0CE33
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For Capacitor & Resistors, CC, CX, CK, CN : Ceramic RD : Carbon Film The components identified by mark are the charactors at 2nd and 3rd CQ : Polyestor RS : Metal Oxide Film critical for safety. digit in the P/No. means as CE : Electrolytic RN : Metal Film Replace only with part number specified. follows; RF : Fusible LOCA. NO PART NO DESCRIPTION LOCA. NO PART NO DESCRIPTION C855 0CE10
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For Capacitor & Resistors, CC, CX, CK, CN : Ceramic RD : Carbon Film The components identified by mark are the charactors at 2nd and 3rd CQ : Polyestor RS : Metal Oxide Film critical for safety. digit in the P/No. means as CE : Electrolytic RN : Metal Film Replace only with part number specified. follows; RF : Fusible LOCA. NO PART NO DESCRIPTION LOCA. NO PART NO DESCRIPTION CP110 181-442Z PE
