LG RT-21FD35M, Service Manual

Page 1: ...E MANUAL CAUTION BEFORE SERVICING THE CHASSIS READ THE SAFETY PRECAUTIONS IN THIS MANUAL CHASSIS MC 049B MODEL RT 21FD35M V VX website http biz LGservice com e mail http www LGEservice com techsup html MENU OK VOL PR ...

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: ...cepts 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 favorite programme 10 TURBO PICTURE SOUND BUTTON option selects Turbo picture and sound 11 MUTE switch...

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: ...de F F G G Volume Up Down adjusts the volume adjusts menu settings D D E E Programme Up Down selects a programme or a menu item switches the set on from standby 6 AUDIO 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 sock et 8 EYE option adjusts picture according to the surround ing ...

Page 7: ...rd 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 CONVENTIO...

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: ... B3 J521 C3 J522 B3 J523 C3 J524 C3 J525 C3 J526 C3 J527 C3 J528 C3 J529 B3 J530 B3 J531 B3 J532 B3 J533 B2 J534 C2 J535 C1 J536 B4 J537 C5 J538 C4 J539 C4 J540 B2 J541 B3 J542 B3 J543 B3 J544 B3 J545 C2 J546 B3 J547 B3 J548 B3 J549 C2 J550 B3 J551 B3 J552 B3 J553 B3 J554 B3 J555 B3 J556 B3 J557 B3 J558 C3 J559 B3 J560 B3 J561 C5 J562 C5 J564 C4 J565 C4 J566 C4 J567 C4 J568 C4 J569 B4 J570 C4 J571...

Page 18: ...SIDE A V 18 POWER S W ...

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 174 520 913 170 150 112 153 400 310 300 600 120 104 943 330 320 570 540 ...

Page 21: ...ASSEMBLY RT 21FD35M 1PHONE 049B 8G068 VN SET 520 6871VMM910L PWB ASSEMBLY MAIN MC049B RT 21FD35VX LTSLVC8 VN CASA S 6871VMM910R PWB ASSEMBLY MAIN MC049B RT 21FD35M LLSLVU8 VN MOS 6871VMMT79T PWB ASSEMBLY MAIN MC049B RT 21FD35V LTSLVV8 VN8 DVD 6871VMMT79U PWB ASSEMBLY MAIN MC049B RT 21FD35VX LTSLVS8 VN S E PH 540 6871VSMABDL PWB ASSEMBLY SUB POWER MC049B 21FD35 VN 4P AC SUB 6871VSMABDY PWB ASSEMBLY...

Page 22: ...0 20 F Y5V TA52 100P 50V K B TA52 100P 50V K B TA52 470P 50V K B TA52 470P 50V K B TA52 LOCA NO PART NO DESCRIPTION D827 IC11 IC12 IC13 IC301 IC601 IC802 IC821 IC822 IC824 IC825 IC826 IC853 IC901 Q104 Q1101 Q301 Q401 Q402 Q501 Q502 Q503 Q504 Q505 Q507 Q508 Q510 Q601 Q802 Q803 Q807 Q808 D301 D403 D405 D406 D407 D501 D502 D503 D504 D601 D602 0IMCRKE018A 0IMCRMN031B 0IMMRSG036C 0IFA752700A 0IPH610700...

Page 23: ...528 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 C609 C610 C611 C612 C613 C614 C615 C616 C617 C618 C619 C620 C625 C626 C627 C632 C803 C804 C806 C807 C809 C810 C811 0CN1040K949 0CN1040K949 0CN1040K949 0CN1040K949 0CN1010K519 0CX3300K409 0CN1040K949 0CE107DD618 0CN1040K949 0CN1040K949 0CN1040K949 0CN1040K949 0CN1040...

Page 24: ...EAD 10UH K 2 3 3 4 TP INDUCTOR AXIAL LEAD 1 0UH K 2 3 3 4 TP INDUCTOR AXIAL LEAD 1 0UH K 2 3 3 4 TP INDUCTOR AXIAL LEAD 10UH K 2 3 3 4 TP COIL CHOKE 82UH PHY TURN LOCA NO PART NO DESCRIPTION T401 T803 P1205 P1206 P902 F802 F804 F805 F806 FR401 FR403 FR404 FR405 FR901 J202 J203 J204 J211 J402 R102 R109 R110 R111 R1116 R1117 R1118 R1119 R112 R1120 R1121 R1122 R1123 R113 R114 R115 R12 R124 R125 R1254...

Page 25: ...1 6 W 5 00 TA52 LOCA NO PART NO DESCRIPTION R522 R523 R524 R526 R527 R530 R532 R534 R535 R536 R539 R540 R542 R543 R545 R555 R557 R558 R562 R563 R601 R602 R603 R604 R605 R606 R607 R608 R609 R610 R611 R612 R613 R614 R615 R616 R617 R618 R619 R620 R621 R624 R664 R802 R803 R804 R805 R806 R807 R808 R809 R810 0RD0152F609 0RD1000F609 0RD1000F609 0RD1201F609 0RD2702F609 0RD3304F609 0RD1000F609 0RD1201F609 ...

Page 26: ...0 PLIKOR HIGH SURGE 1 2 W 1 5K 10 PLIKOR HIGH SURGE 1 2 W 1 5K 10 PLIKOR HIGH SURGE 2 2M OHM 1 2 W 7 0 5 00 TA52 10 OHM 1 6 W 5 TA52 TACT 2LEAD 160G TA LG C D SDKEA3 ALPS IEC 250V 8A HORIZONTAL 480G TACT 2LEAD 160G TA LG C D TACT 2LEAD 160G TA LG C D TACT 2LEAD 160G TA LG C D TACT 2LEAD 160G TA LG C D TACT 2LEAD 160G TA LG C D FERRITE AXIAL 62MM 1UH NY 3 5X6 0MM FERRITE AXIAL 62MM 1UH NY 3 5X6 0MM...

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

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

Page 29: ...Sep 2004 Printed in Korea P NO 3828VD0196V ...