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LG RT-21CC25M, Service Manual

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LG RT-21CC25M Service Manual Download Page 2

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CONTENTS

Contents ...................................................................................................................2

Safety Precautions..............................................................................................3

Control Descriptions..........................................................................................4

Specifications........................................................................................................7

Adjustment Instructions .................................................................................8

Trouble Shooting.................................................................................................12

Printed circuit board.........................................................................................16

Block Diagram ......................................................................................................19

Exploded View....................................................................................................20

Exploded View Parts List ..............................................................................21

Replacement Parts List .................................................................................22

SVC. Sheet..................................................................................................................

Summary of Contents for RT-21CC25M

Page 1: ...ANUAL CAUTION BEFORE SERVICING THE CHASSIS READ THE SAFETY PRECAUTIONS IN THIS MANUAL CHASSIS MC 049B MODEL RT 21CC25M RX MODEL RT 21CC25V VM VX website http biz LGservice com e mail http www LGEservice com techsup html ...

Page 2: ...ety Precautions 3 Control Descriptions 4 Specifications 7 Adjustment Instructions 8 T rouble Shooting 12 Printed circuit board 16 Block Diagram 19 Exploded View 20 Exploded View Parts List 21 Replacement Parts List 22 SVC Sheet ...

Page 3: ...perform an AC leakage current check on the exposed metallic parts of the cabinet such as antennas terminals etc to be sure the set is safe to operate without damage of electrical shock Leakage Current Cold Check Antenna Cold Check With the instrument AC plug removed from AC source connect an electrical jumper across the two AC plug prongs Place the AC switch in the on position connect one lead of ...

Page 4: ...ndby scans programmes automatically F G Volume Up Down adjusts the volume adjusts menu settings OK accepts your selection or displays the current mode 6 Q VIEW returns to the previously viewed programme 7 TELETEXT BUTTONS option These buttons are used for teletext For further details see the Teletext section 8 PSM Picture Status Memory recalls your preferred picture setting 9 FAVOURITE selects a f...

Page 5: ... and sub picture INPUT selects the input mode for the sub picture SIZE adjusts the sub picture size STILL freezes motion of the sub picture POSITION relocates the sub picture in clockwise direction 9 4 PIP switches on or off the 9 or 4 sub pictures No function COLOURED BUTTONS These buttons are used for teletext only TELETEXT models or programme edit Without TELETEXT PIP POWER MUTE 1 2 3 4 5 6 7 8...

Page 6: ... item switches the set on from standby 6 AUDIO or AUDIO L R VIDEO IN SOCKETS AV2 option Connect the audio video out sockets of external equipment to these sockets 7 HEADPHONE SOCKET option Connect the headphone plug to this socket 8 TURBO SOUND PICTURE option switches Turbo sound or Turbo picture on or off 9 EYE option adjusts picture according to the surrounding conditions 6 7 VIDEO L MONO I AUDI...

Page 7: ...d input Voltage 110 240V 50 60Hz 4 Measurement must be performed after heat run more than 20min 5 Adjusting Standard for this chassis is followed a special standard No 1 2 3 4 5 6 7 8 Item Receiving System Receiving Channel Input Voltage Market Screen Size Tuning System Operating Environment Storage Environment Remark For EU For Non EU For EU For Non EU NTSC M Multi model Non EU EU FLAT CONVENTION...

Page 8: ...ve the DY to make equal red on whole screen and it does not to make the DY by fixed screw after check a simple color of Red Green Blue and white raster whether or not it is a pollution of color At this time take care raster of screen and DY must fixing in the condition which maintains a horizontality 6 Check the receiver by move direction When adjustment is not working adjust with the assisted MAG...

Page 9: ...U05CH 2 Deflection setting data adjustment is operate by SVC communicator 3 Enter the deflection adjustment mode by selection SERVICE1 on SERVICE MENU after pressing LINE SVC MODE IN START KEY 4 Use the CH D E key to select adjustment item 5 Use the VOL F G key to increase decrease data Note 1 When adjusting a deflection adjust N50Hz of PAL signal first and adjust a deflection at Normal 60Hz NTSC ...

Page 10: ...S VA VL SC HS 512 511 512 511 512 511 512 511 32 2047 150 12 140 6 100 140 12 140 6 123 Variable range N50Hz PAL FLAT 21 N60Hz NTSC FLAT 21 INCH SYS SOUND CH AU Option Code 0 1 2 3 4 5 6 7 0 1 2 3 0 1 2 3 0 1 Function 21A 21B 21C 29F 25F 28WF 32WF 28N 34F 29N 25N BG I DK BG I DK L BG I DK M BG L RF STEREO AV STEREO MONO MONO DUAL Using Not using Table 4 Initial deflection setting data AV2 DVD SCAR...

Page 11: ...14 15 16 17 0 1 0 100 Function ENG ONLY EU 5EA EU ETC GREECE EU ALL FARSI ARAB URDU E HINDI E I M V E THAI E CHINA WEST EU EAST EU1 TURKEY EU EAST EU2 CYRILLIC1 CYRILLIC2 CYRILLIC3 TURK GRE1 TURK GRE2 TURK GRE3 ARAB FRA ARAB ENG ARAB HEB1 ARAB HEB2 FARS ENG FARS FA FARS ALL AUTO WITHOUT HDEV WITH HDEV SETTING VOL MAX ...

Page 12: ...k The voltage At pin of IC821 IC822 Q807 Check Replace C821 IC822 Q807 Check The Voltage At pin 2 19 20 21 24 of IIC11 Check Replace TU 101 Check Replace F806 D828 D805 OK OK OK OK OK OK NO NO NO NO NO NO No Raster Sound OK 1 2 Check the Heater voltage of CPT 6 6 4Vrm s Check HV Screen Voltage of CPT Check the Heater pulse of FBT T402 Check R G B out of CPT Board Check FBT T402 Check 185V line of ...

Page 13: ...Check T401 each pin voltage Check Replace T402 Check the Voltage Of C803 Check the Voltage Pin 4 OF IC801 Check Replace IC801 IC802 IC826 Check Fuse and Diode of secondary Load of SMPS trans T803 Check Replace IC11 Check Replace IC11 Check Replace Q402 Check Replace T401 Check Replace Q401 Check Replace Fuse Check Replace DB801 Check Replace Fuse IC801 NO OK OK OK NO Open NO 18 20V Normal Yes Yes ...

Page 14: ...p Check 1 8V 3 3V 5V DC Voltage Check SMPS Trans Secondary Voltage Check pin18 Reset Voltage Check IC13 Reset IC Check pin57 58 SCL SDA Check IC12 EEPROM SCL SDA Line RelaceIC11 Q501 Q503 Q504 R G B out of IC11 Check Replace CPT Board com ponent Go to No Sound Picture OK OK OK OK OK NO NO NO NO NO NO 3 3V DC OK OK 3 3V DC Check receiving system in MENU execute Auto Program ...

Page 15: ...age Of pin2 19 20 21 24 of IC11 Check the signal line of SPK L R Check pin 55 m ute of IC11 Check the waveform At pin2 4 of IC601 Check the waveform At pin6 of IC601 Check the waveform At pin8 9 11 12 of IC601 Check thevpltage At pin7 5 of IC601 Check Replace D828 D805 F806 Check the connection of side or Front AV Board P603A Replace IC601 AV OK OK OK OK NO NO OK OK NO NO NO NO Correct the Board N...

Page 16: ... 16 PRINTED CIRCUIT BOARD MAIN ...

Page 17: ...5 D5 J206 C3 J207 D5 J208 C1 J209 D4 J210 C5 J211 C5 J212 E5 J213 D5 J214 D5 J215 B5 J216 D5 J217 B5 J219 D4 J220 D5 J221 D5 J222 D5 J223 B5 J224 B5 J225 E5 J226 C1 J230 C1 J231 C1 J232 D1 J233 C1 J234 C1 J235 C1 J242 D1 J261 C5 J301 C4 J302 D4 J303 E4 J306 D4 J308 B2 J309 B2 J310 B2 J311 E4 L11 E1 L12 C3 L101 A5 L102 B5 L103 B5 L201 C5 L202 D5 L203 D5 L204 C5 L205 E5 L206 C5 L207 D5 L208 D5 L210 ...

Page 18: ... 18 SIDE A V ...

Page 19: ... AMP IC301 TDA4863A 14V 14V VA H OUT 35V H Vc c TU 33V S Vc c 6 5 V 12V B SAW FILTER Z101 PIP_BOARD SDA9489X S1117 18 IC825 S111 7 33 IC853 KIA78S06P IC824 KA78R33 KA78R05C ST 5V ST 3 3V ST 1 8V 3 3 V GAME HIC HIC01 190 V VB H FLB IIC 33V 5V TV MONITOR OUT SCART RGB IN Y Cb Cr IN AV IN H Vc c 5V S Vc c PIP RGB PIP VIDEO IIC VS H FLB 5V ST 5V ON OFF DATA CLOCK RESET VIDEO AUDIO 190V ...

Page 20: ... 20 EXPLODED VIEW 300 330 310 120 600 320 520 913 170 150 153 112 943 400 174 570 ...

Page 21: ...25M ABS HF 380 6KEY 320 320 062E SPRING KNOB 320 062H SPRING COIL 330 5020V00841B BUTTON POWER RT 21CC25VX ABS HF 380 NON 117A 5020V00875C BUTTON POWER RT 21CC25M ABS HF 380 1KEY 400 3809V00396S BACK COVER ASSEMBLY RT 21CC25V 1PHONE IN DIRECT ORDER C SKD 3809V00396T BACK COVER ASSEMBLY RT 21CC25M 1PHONE 8G068 IN SET 3809V00403E BACK COVER ASSEMBLY RT 20 21CC25VX 1PHONE 8G068 SY SET 3809V00396U BAC...

Page 22: ...Z5 1B TP GRANDE DO34 0 5W 5 1V 0 02A 22P 50V J SL TA52 0 0027UF D 100V 5 PE TP5 0 1UF D 50V 80 20 F Y5V TA52 10000P 16V M Y TA52 10000P 16V M Y TA52 LOCA NO PART NO DESCRIPTION IC11 IC12 IC13 IC301 IC601 IC801 IC802 IC821 IC822 IC824 IC825 IC826 IC853 IC901 Q104 Q11 Q301 Q401 Q402 Q403 Q501 Q502 Q503 Q504 Q505 Q507 Q508 Q510 Q601 Q801 Q802 Q803 Q804 Q807 Q808 D301 D403 D405 D406 D407 D444 D501 D50...

Page 23: ...7 C518 C519 C520 C521 C523 C524 C525 C526 C527 C528 C529 C530 C531 C532 C533 C534 C535 C536 C537 C538 C540 C541 C542 C543 C545 C546 C547 C548 C550 C602 C603 C604 C605 C606 C607 C608 0CQ6831N509 0CE475DK618 0CN1040K949 0CN2710K519 0CN2710K519 0CN1040K949 0CE107DD618 0CN1040K949 0CE475DK618 0CN1040K949 0CE107DD618 0CN1040K949 0CE107DD618 0CN1040K949 0CN1040K949 0CN1040K949 0CN1040K949 0CN1010K519 0C...

Page 24: ...M FL TP5 220UF STD 10V M FL TP5 4 7UF STD 250V 20 FL TP 5 LOCA NO PART NO DESCRIPTION C902 C903 C904 L101 L103 L11 L12 L201 L202 L204 L206 L207 L208 L211 L213 L251 L252 L401 L501 L502 L503 L504 L505 L506 L507 L508 L509 L801 T401 T803 P1205 P1206 P902 F802 F804 F805 F806 FR401 FR403 FR404 FR405 J201 J211 J402 R102 R109 0CQ1044R539 181 033S 0CE475DR618 0LA0102K139 0LA0101K119 0LA0102K119 0LA0101K119...

Page 25: ...RT NO DESCRIPTION R37 R38 R403 R404 R405 R409 R410 R412 R418 R419 R42 R420 R421 R422 R501 R502 R503 R505 R506 R507 R508 R509 R510 R511 R512 R513 R514 R515 R516 R517 R518 R519 R520 R521 R522 R523 R524 R526 R527 R530 R532 R534 R535 R536 R539 R540 R542 R543 R545 R555 R557 R558 0RD1000F609 0RD1002F609 0RD5600A609 0RD0332A609 0RS8200K607 0RD1501A609 0RS2702K607 0RD7501A609 0RD2702F609 0RD2702F609 0RD47...

Page 26: ...6 W 5 00 TA52 4 7K OHM 1 6 W 5 TA52 LOCA NO PART NO DESCRIPTION R903 R904 R905 R906 R907 R908 R909 R910 R911 R912 R914 SW11 SW12 SW13 SW14 SW15 SW16 SW801 FB801 FB802 FB803 FB825 T802 X11 Z101 JK202 JK202 JK202 PJ1202 PJ1202 PJ1203 A1 A1 A2 A2 F801 PA01 SK901 T402 TH801 TU101 VD801 0RD2200F609 0RD2200F609 0RD2200F609 0RD1000F609 0RD1000F609 0RD1000F609 0RCZVTA002D 0RCZVTA002D 0RCZVTA002D 0RD2204A6...

Page 27: ...P NO 3854VA0162A S1 2004 6 12 ...

Page 28: ...SVC SHEET 3854V A0162A S ...

Page 29: ...Mar 2005 Printed in Korea P NO 3828VD0196B ...

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