LG CF-14F80K Service Manual Download Page 1

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COLOR TV

SERVICE MANUAL

CAUTION

BEFORE SERVICING THE CHASSIS,
READ THE SAFETY PRECAUTIONS IN THIS MANUAL.

CHASSIS : MC-019A

MODEL : CF-14/20/21F80K

website:http://biz.LGservice.com

e-mail:http://www.LGEservice.com/techsup.html

Aug.,2001

Printed in Korea

P/NO : 3828VD0104B

Summary of Contents for CF-14F80K

Page 1: ...V SERVICE MANUAL CAUTION BEFORE SERVICING THE CHASSIS READ THE SAFETY PRECAUTIONS IN THIS MANUAL CHASSIS MC 019A MODEL CF 14 20 21F80K website http biz LGservice com e mail http www LGEservice com techsup html ...

Page 2: ... 3 Servicing Precautions 4 Specifications 6 Description of Controls 7 Disassembly Instructions 10 Adjustment 11 Purity Convergence Adjustment 14 Block Diagram 17 Exploded View 18 Exploded View Parts List 19 Replacement Parts List 20 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: ...SD On Screen 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...

Page 7: ...cts a programme or a menu item switches the set on from standby 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 selects a favorite programme 7 TELETEXT BUTTONS option These buttons are used for teletext For further details see the Teletext section 8 ...

Page 8: ...e used for teletext only TELETEXT models or programme edit Battery installation The remote control handset is powered by two AAA type batteries To load the batteries turn the remote control handset over and open the battery compartment Install two batteries as indicated by the polarity symbols and marked inside the compartment Note To avoid damage from possible battery leakage remove the batteries...

Page 9: ... AUDIO VIDEO IN SOCKETS AV option Connect the audio video out sockets of external equipment to these sockets Note If both the input jacks on the front side panel and back panel have been connected to external equipments simultane ously only the input jacks on the front side panel can be received 7 HEADPHONE SOCKET option Connect the headphone plug to this socket 8 TURBO SOUND PICTURE option switch...

Page 10: ...oval 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 han...

Page 11: ... 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 1 SCART TOP 2...

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: ...7266 97 STEREO Sound Max SOUND AMP TDA7266 97 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 ST BY TRANS 3W Opt SPK L OUT 24 25 47 44 AUDIO AM IN L L Only 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 RE...

Page 18: ... 18 EXPLODED VIEW 913 170 150 153 112 400 943 104 300 310 120 320 330 20 21 320 330 310 120 300 105 14 174 520 ...

Page 19: ...3106V00050X 3106V00061U CABINET UNIT 310 5020V00207A 5020V00179C 5020V00171C BUTTON CONTROL 6KEY 320 320 062J 320 062E 320 062E SPRING KNOB 330 5020V00206A 5020V00180C 5020V00170C BUTTON POWER 400 3809V00081N 3809V00073Q 3809V00089S BACK COVER ASSY 520 6871VMM767B 6871VMM766H 6871VMM766J PCB ASSY MAIN 019A LGEMT COM 913 332 057B 332 057B 332 057B SCREW ASSY HEXAGON HEAD 943 1PTF0403116 1PTF0403116...

Page 20: ...388A KEC TR 2SA1980Y TP AUK TR 2SC5343Y TP AUK TR 2SC5343Y TP AUK TR 2SC5343Y TP AUK LOCA NO PART NO DESCRIPTION Q215 Q216 Q301 Q402 Q442 Q551 Q552 Q571 Q621 Q651 Q801 Q802 Q806 C01 C02 C03 C04 C05 C07 C21 C51 C101 C102 C107 C109 C110 C111 C112 C201 C208 C209 C210 C221 C222 C223 C253 C255 C260 C301 C302 C303 C304 C307 C401 21 C402 C403 20 21 C404 C405 0TR534309AA 0TR534309AA 0TR198009BA 0TR570200A...

Page 21: ...N C626 C631 C633 C634 C635 C636 C637 C638 C639 C640 C641 C642 C643 C644 C645 C646 C653 C655 C801 C802 C803 C804 C806 C807 C808 C809 C811 C812 C813 C815 C816 C817 C818 C819 20 C820 C821 C823 C825 C828 C829 C830 C831 C834 C841 C901 C902 C903 C904 C905 0CE226DK618 181 007H 0CE107DD618 0CN1030F679 0CE476DF618 0CQ6821N509 181 007D 0CQ5621N509 0CQ5621N509 181 007D 0CQ6821N509 0CQ5621N509 181 007H 0CQ473...

Page 22: ...09 0RD3301F609 0RD3301F609 0RD4701F609 0RD4701F609 0RD1000F609 0RD1000F609 0RD1001F609 0RD1001F609 0RD1001F609 0RD4701F609 0RD1000F609 0RD1000F609 0RD2201F609 0RD3902F609 0RD2200F609 0RD1201F609 0RD2201F609 0RD4701F609 0RD1201F609 0RD6200F609 0RD1000F609 0RD1000F609 0RD1002F609 0RD1202F609 0RD1802F609 0RS0272J607 0RD0392F609 0RD0562F609 0RD1201F609 0RD3601F609 0RD1000F609 0RD6800F609 0RD0272F609 0...

Page 23: ... R551 R552 R553 R554 R556 R557 R558 R572 R573 R602 R608 R610 R621 R622 R623 R624 R625 R626 R627 R628 R632 R633 R634 R651 R657 R801 R802 R803 R804 R805 R806 R808 R809 R812 R813 R814 R815 R816 R901 R902 R903 R904 R905 R906 R907 0RD3900F609 0RD1001F609 0RD1000F609 0RD1000F609 0RD1000F609 0RD1002F609 0RD2701F609 0RD1200F609 0RD1200F609 0RD3300F609 0RD4701F609 0RD1500F609 0RD4701F609 0RD4701F609 0RD560...

Page 24: ...KHV17910B 12V SWITCH TACT SKHV17910B 12V SWITCH TACT SKHV17910B 12V SWITCH PUSH SDKEA3 250V 8A HORIZO FILTER EMC BI3857 FEELUX 5 7X3 6MM FILTER EMC BI3857 FEELUX 5 7X3 6MM FILTER EMC BI3857 FEELUX 5 7X3 6MM FILTER BAND PASS TPSRD6M00B00 A0 FILTER BAND PASS TPWRD5M50B02 A0 FILTER BAND PASS TPSRD4M50B00 A0 FILTER EMC SQE2930 36MH 0 5PHY 105TURN RESONATOR CRYSTAL HC49U 12 000MHZ 30P FILTER SAW OFWK29...

Page 25: ...SVC SHEET 3854V A0083A S SVC SHE ...

Page 26: ...529 D4 C530 C4 C531 C4 C532 B2 C534 C4 C535 C4 C536 C4 C538 C3 C540 C4 C541 C4 C542 C4 C543 C3 C544 C3 C545 C3 C546 C3 C548 D4 C549 C4 C551 D4 C552 D4 C553 D3 C561 C4 C573 E5 C574 E5 C593 C3 C594 C4 C595 C1 C601 B3 C602 B2 C603 B2 C604 B3 C605 B2 C606 A2 C607 B3 C611 B3 C612 B3 C621 A2 C622 A3 C623 A3 C624 B2 C625 A2 C626 A2 C631 D1 C632 D2 C633 D1 C634 C1 C635 D1 C636 C1 C637 C1 C638 C1 C639 C2 C...

Page 27: ...P NO 3854VA0083A S 2002 11 14 ...

Page 28: ...ice com sup html ...

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