LG RT-21FB200PX Service Manual Download Page 32 | Manualshive

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SVC. SHEET : 3854VA0083C-S

SVC. SHE

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Summary of Contents for RT-21FB200PX

Page 1: ...E MANUAL CAUTION BEFORE SERVICING THE CHASSIS READ THE SAFETY PRECAUTIONS IN THIS MANUAL CHASSIS MC 019B MODEL RT 21FB200PX MODEL RT 21FB220PX website http biz LGservice com e mail http www LGEservice com techsup html ...

Page 2: ...ng Precautions 4 Specifications 6 Description of Controls 7 Disassembly Instructions 10 Adjustment 11 Purity Convergence Adjustment 14 Block Diagram 17 T rouble Shooting 18 Exploded View 22 Exploded View Parts List 23 Replacement Parts List 24 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 positioin connect one lead of...

Page 4: ...s are integrated circuits and some fieldeffect transistors and semicounductor chip components The following techniques should be used to help reduce the incidence of component damage caused by static by static electricity 1 Immediately before handling any semiconductor component or semiconductor equipped assembly drain off any electostatic charge on your body by touching a known earth ground Alter...

Page 5: ...the corresponding lead on the circuit board 4 Securely crimp each connection and solder it 5 Inspect on the circuit board copper side the solder joints of the two original leads If they are not shiny reheat them and if necessary apply additional solder Fuse and Conventional Resistor Removal Replacement 1 Clip each fuse or resistor lead at top of the circuit board hollow stake 2 Securely crimp the ...

Page 6: ...n Display EASY MENU O Voice coil impedance 8 ohm O Sound output 7W 2 MAX Dual Stereo A2 NICAM Option O External connection Head Phone Jack A V in 2 PERI Connector Full Scart 1 DVD in O External In Output Audio In 0 5Vrms 3dB over 10Kohm Audio Out 0 5Vrms 3dBb below 1Kohm Video In Out 1Vp p 3dB 75ohm DVD In Y 1Vp p 3dB Pb Pr 0 7Vp p 3dB O Feature Auto programme Manual programme CSM Color Status Mem...

Page 7: ...set on from standby scans programmes automatically F F G G Volume Up Down adjusts the volume adjusts menu settings 7 VCR BUTTONS control a LG video cassette recorder 8 SSM Sound Status Memory recalls your preferred sound setting 9 PSM Picture Status Memory recalls your preferred picture setting 10 EYE option switches the eye function on or off 11 TELETEXT BUTTONS option These buttons are used for ...

Page 8: ...ezes 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 COLOURED BUTTONS These buttons are used for teletext only TELETEXT models or programme edit Battery installation The remote control handset is powered by two AA type batteries To load the batteries turn the remote control handset over and open the battery comp...

Page 9: ... to external equipments simultaneously only the input jacks on the front side panel can be received 10 HEADPHONE SOCKET option Connect the headphone plug to this socket 11 EYE option adjusts picture according to the sur rounding conditions 12 TURBO SOUND PICTURE option switches Turbo sound or Turbo picture function on or off Note Do not place any heavy objects over 4Kg on the RF RT 21FA34 series m...

Page 10: ... Removal 1 Pull out the CPT board from the CPT neck 2 Place the front cabinet on soft material not to mar the front surface or damage control knobs 3 Remove 5 screws securing the picture tube mounting brackets to the front cabinet 4 Carefully separate CPT from the front cabinet PICTURE TUBE HANDLING CAUTION Due to high vacuum and large surface area of picture tube great care must be exercised when...

Page 11: ...e to get into SVC mode 2 Press the Yellow button several times to find OPTION 1 or OPTION 2 3 Input the correspond OPTION data referring to Table below with the numeric buttons 4 Press the OK V button to memorize the data Table 1 OPTION 1 Function Table 2 OPTION 2 Function Table 3 OPTION 3 Function ADJUSTMENT 21 FCD 12 FLAT 14 16 CPT 8 15 CPT 10 FLAT 20 21 CPT 12 CDL Data Remark 0 1 0 1 0 1 0 1 0 ...

Page 12: ... Press Channel UP DOWN button for desirous function adjustment 5 Adjust VOL or VOL button in each status of RG BG for X 272 8 Y 288 8 with color analyzer Europe Model X 288 8 Y 295 X 272 8 11 000K 7 Press the OK V button to memorize the data Test Point AGC TP C101 Adjust Remote Controller Tuner P N Marker AGC Voltage 6700VPF009G LG Innotek W S TUNER 2 7 0 05V 6700VPF016A DAEWOO W S TUNER 2 7 0 05V...

Page 13: ... is in accord with geometric horizontal center of the CPT VA Vertical Amplitude Adjust so that the circle of a digital circle pattern may be located within the effective screen of the CPT SC Vertical S Correction Adjust so that all distance between each horizontal lines are to be the same VS Vertical Shift Adjust so that the horizontal center line of a digital circle pattern is in accord with geom...

Page 14: ...mpletely forward 5 Reconnect the internal degaussing coil 6 Position the beam bender locking rings at the 9 o clock position and the other three pairs of tabs 2 4 and 6 pole magnets at the 12 o clock position 7 Perform the following steps in the order given to prepare the receiver for the purity adjustment procedure a Face the receiver in the magnetic north direction b Externally degauss the recei...

Page 15: ...e internal degaussing coil 9 Turn on the receiver connect a signal generator to the VHF antenna terminal and apply a crosshatch signal Caution During the convergence adjustment procedure be very careful not to disturb the purity adjustment tabs are accidentally move purity should be confirmed before proceeding with the convergence adjustments Note Make sure the focus is set correctly on this instr...

Page 16: ... and blue horizontal lines Fig upper right 17 Temporarily place a rubber wedge at the 5 o clock and 7 o clock positions to hold the horizontal position of the yoke 18 Check the 3 o clock and 9 o clock areas to confirm that the red and blue vertical lines are converged If the lines are not converged slightly offset the horizontal tilt of the yoke move the temporary rubber wedges if necessary to equ...

Page 17: ...7 STEREO IC131 5V REG Option Part IIC Bus Line TDA9381 Non TXT Audio Mono TV OUT 28 33 21 22 38 Sound Trap Part Video OUT TV MNT OUT 50 42 51 53 STEREO B01K A13P MONO B01L 10 12 9 5 3 9 8 10 2 6 14V 1 SPK L OUT 24 25 47 44 AUDIO 30 39 31 40 28 30 14 39 8V From IC844 14 39 39 3 3V Reg 5V From IC842 3 3V 8V From IC844 IC844 8V REG IC842 5V REG 41 42 1 32 IC02 IC631 IC661 5V 5V 5 1V SFE 5 5 6 0M 32 S...

Page 18: ...ce Fuse DB801 Check replace DB801 Normal Abnormal Yes Yes Yes Yes No No No No No No No No No OK 254 380V Open 0V Is the voltage at pin61 56 54 of IC01 3 3V Yes Is the voltage at pin3 of IC02 5V Check the In Out of IC842 Check the voltage at D805 or D815 cathode Check Replace F812 Check Replace IC01 IC02 Yes NO RASTER SOUND OK Check the Heater voltage of CPT 6 6 5Vrms Check FR404 FR902 P302 Check F...

Page 19: ...place IC651 Check Replace IC01 Check the waveform at pin28 IC01 NO NO MONO Select correct system in menu Check Replace TU101 Check the voltage at pin 16 33 46 of IC661 NO OK Check the waveform at pin 16 of TU101 Check the waveform at pin 4 12 of IC602 Check the voltage at pin 6 7 of IC602 Check the waveform at pin 1 2 14 15 of IC602 Check the voltage at pin 3 13 of IC602 Check the waveform at pin ...

Page 20: ...k the voltage at pin 3 13 of IC602 Check the waveform at pin 15 18 of IC631 Check Replace F811 D824 Check Replace Q621 IC603 Check Replace IC602 OK OK OK OK OK NO NO AV STEREO NO NO Check Replace IC301 T401 Check the PIP Board NO Check the waveform at pin 1 2 of P501 Is the voltage at pin 45 of IC01 3V Check the waveform at pin 6 10 of P501 Check the waveform at pin 46 47 48 of IC01 Check Replace ...

Page 21: ... operate properly Store in manual program MENU Check 5V 33V IIC Bus Line of TUNER Is the CVBS signal OK IC01 pin40 Check R G B signal at IC501 pin51 52 53 Check 5V 33V IIC Bus Line OK NO NO OK OK Check Replace IC01 TUNER NO OK Check Replace CPT Board component Check CVBS singal Line IC01 Check IK signal at IC01 pin50 similar to CVBS Check IC01 pin50 51 52 53 IK R G B OK NO ...

Page 22: ... 22 EXPLODED VIEW 120 124 123 174 520 913 170 150 153 112 530 330 320 700 540 943 400 300 310 550 121 600 501 ...

Page 23: ...OUSING L 300 4 0 300 3091V00439B CABINET ASSY 3090V00342 LG FLAT 310 5020V00657A BUTTON CONTROL 320 320 062E SPRING KNOB 330 5020V00656A BUTTON POWER 400 3809V00296A BACK COVER ASSY SET DVD 1PHONE 501 4810V00555B BRACKET MAIN 520 6871VMM851M PWB ASSY MAIN 019B RT 21FB22VT 530 6871VSM960D PWB ASSY DVD SCART PIP 540 6871VSM962W PWB ASSY POWER BOARD 550 6871VSM962X PWB ASSY KEY CONTROL 600 6871VSM963...

Page 24: ...T NO DESCRIPTION D101 D102 D301 D401 D441 D442 D443 D501 D571 D802 D803 D806 D807 D808 D814 D815 D901 D902 D903 D904 DB801 LD1101 R30 ZDP01 ZD01 ZD101 ZD201 ZD441 ZD442 ZD443 ZD501 ZD601 ZD901 C01 C02 C03 C04 C05 C07 C08 C09 C12 C13 C51 C101 C102 C107 C109 C110 0DD414809ED 0DSVH00019A 0DD400509AA 0DD150009CA 0DD060009AC 0DD060009AC 0DD060009AC 0DD414809ED 0DD414809ED 0DD100009AM 0DD414809ED 0DD100...

Page 25: ...C575 C591 C593 C594 C595 C596 C597 C598 C601 C602 C603 C605 C606 C607 C612 C631 C632 C633 C634 C635 C636 C637 C638 C639 C640 C641 C642 C643 C644 C645 C646 C801 C802 C803 C804 C806 C807 C808 C811 C812 C813 C815 C816 C817 C818 0CN2230H949 0CN2230H949 0CN8210K519 0CQ4721N509 0CX4700K409 0CE107DD618 0CQ1021N509 0CE107DF618 0CE106DF618 0CE475DK618 0CQ1041N509 0CE475DK618 0CE106DF618 0CE106DF618 0CE476D...

Page 26: ...P01A P02A P02B P07A P102 P103 P301 P501 P502 P551B P552B P601 P602 P603 P802A P802B P803A P803B P902 P903 P1107 P1111 P1112A P1112B P1113A P1113B P1205 P1206 C546 D816 0LA0102K119 0LA0102K119 0LA0102K119 0LA0681K119 0LA0561K119 0LA0102K049 150 C02F 0LA0472K119 0LA0102K119 0LA0102K119 0LA0102K119 0LA0101K119 0LA0681K119 0LA0681K119 0LA0681K119 6174V 6006E 6170VC0003A 151 A13P 366 932B 366 932B 387 ...

Page 27: ... R207 R208 R209 R212 R213 R214 R215 R216 R217 R218 R219 R220 R221 R222 R223 R224 R225 R226 R227 R228 R251 R301 R302 R304 R304 R304 R305 R305 R305 R306 R307 R311 R311 R311 R312 R313 R401 R401 R401 R402 R442 R442 0RD0272F609 0RD1000F609 0RD6801F609 0RD2201F609 0RD2201F609 0RD0682F609 0RD2200F609 0RD2702F609 0RD0752F609 0RD0752F609 0RD0752F609 0RD1001F609 0RD4702F609 0RD5101F609 0RD5101F609 0RD5101F6...

Page 28: ...100K OHM 1 6 W 5 TA52 100 OHM 1 6 W 5 00 TA52 100 OHM 1 6 W 5 00 TA52 100K OHM 1 6 W 5 TA52 4 7K OHM 1 6 W 5 00 TA52 10K OHM 1 6 W 5 00 TA52 3 6K OHM 1 6 W 5 00 TA52 7 5K OHM 1 6 W 5 00 TA52 3 6K OHM 1 6 W 5 00 TA52 7 5K OHM 1 6 W 5 00 TA52 The components identified by mark are critical for safety Replace only with part number specified LOCA NO PART NO DESCRIPTION 0RD4702F609 0RD4702F609 0RD1302F6...

Page 29: ...57 FEELUX 5 7X3 6MM AXIAL FILTER EMC BI3857 FEELUX 5 7X3 6MM AXIAL FILTER EMC BI3857 FEELUX 5 7X3 6MM AXIAL FILTER BAND PASS XT6 0MB BAOTONG 6 0MHZ FILTER BAND PASS XT565MB BAOTONG 5 5 6 5MHZ FILTER BAND PASS XT4 5MB BAOTONG 4 5MHZ FILTER EMC SQE2828 18 35MH RESONATOR CRYSTAL KJE RADIAL 12 000MHZ 30P RESONATOR CRYSTAL SNNY RADIAL 20 250MHZ 3 FILTER SAW 0FWK7252M EPCOS 38 9MHZ 5PIN FILTER BAND PASS...

Page 30: ...P NO 3854VA0083C S 1 2 2002 01 15 ...

Page 31: ...1 D4 ZD441 F4 ZD442 E5 ZD443 E4 ZD447 E5 ZD501 C3 ZD601 B3 ZD801 E4 ZD901 B1 ZD902 B1 ZD903 B1 ZD904 B1 MAIN CPT COMPONENT LOCATION GUIDE C01 B4 C02 B4 C03 B3 C04 B4 C05 B4 C07 B3 C08 D4 C09 D3 C11 B4 C12 D3 C13 D3 C16 F1 C21 E1 C51 B4 C101 A5 C102 A5 C103 B5 C104 B5 C105 B5 C106 A5 C107 A5 C108 A5 C109 A4 C110 B5 C111 B5 C112 B5 C113 A4 C114 A4 C121 A4 C131 A4 C132 A4 C133 A4 C201 C5 C202 B5 C203...

Page 32: ...SVC SHEET 3854V A0083C S SVC SHE ...

Page 33: ...Sep 2002 Printed in Korea P NO 3828VD0115L ...

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