LG 20CD1RGE 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-049B

MODEL : 20/21CD1RGE

20/21CD1RGE-TB

website:http://biz.LGservice.com

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

Summary of Contents for 20CD1RGE

Page 1: ...ICE MANUAL CAUTION BEFORE SERVICING THE CHASSIS READ THE SAFETY PRECAUTIONS IN THIS MANUAL CHASSIS MC 049B MODEL 20 21CD1RGE 20 21CD1RGE TB 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: ... 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 switches the sound on or off ...

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: ...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: ...ht side have same portion 4 Pull the DY slowly and fix it when the whole screen become red 4 2 Convergence adjustment 1 Preparation 1 Receive the Cross Hatch pattern for convergence adjustment 09CH 2 Let the contrast at the adequate luminance level 2 Adjustment 1 Converge the RED vertical line and BLUE vertical line in the same line by changing the angle between the 2 tabs of the 4 pole magnet 2 C...

Page 9: ... located within the effective screen of the CPT 2 VL Vertical Linearity Adjust so that the boundary line between upper and lower half is in accord with geometric horizontal center of the CPT 3 SC S Correction Adjust so that all distance between each horizontal lines are to be the same 4 VS Vertical Shift Adjust so that the horizontal center line of a digital circle pattern is in accord with geomet...

Page 10: ...ESCRIPTION JOP EXP 1 3141VMNN40A MAIN MC 049A B CHASSIS ASSY 104 137 162 117 148 OPTION 1 OPTION2 10 Menu Contents VA VL SC VS HS Vert Amplitude Vert Linearity S Correction Vert Position Hor Position 512 511 512 511 512 511 512 511 32 2047 150 50 140 6 151 range N50Hz PAL 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 21FM TX ONLY 29F 25F 28WF 32W...

Page 11: ... 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 Disable HOTEL function Enable HOTEL function MAX VOLUME VALUE LNA A2_ST ECO TILT BOOST VN3MN CHINA FM LH Option Code 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 Function L...

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 180V 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: ... C2 P11A C1 P12A E1 P14A C1 P15A C2 P15B A5 P1602A D1 P201A C1 P401A F4 P401B F4 P401C F4 P401D F4 P403A E5 P551A C3 P603A B2 P604A C2 P801A G1 P801B G1 P802A F1 P802B F1 P803A F1 P803B F1 P902A C2 PA01 F1 PJ201 C1 Q11 E1 Q41 C2 Q42 C2 Q102 A5 Q103 A5 Q104 B4 Q105 A4 Q106 A4 Q301 D4 Q401 G4 Q402 G3 Q403 D4 Q501 B3 Q502 B2 Q503 C2 Q504 C2 Q505 C5 Q507 B5 Q508 B2 Q510 B2 Q601 A2 Q801 D3 Q802 D1 Q803...

Page 18: ... 18 MEMO ...

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 112 913 170 150 153 300 120 310 330 320 700 P801 400 943 520 ...

Page 21: ... 320 320 062H 320 062H SPRING COIL 330 5020V01094A 5020V01094A BUTTON POWER RT 20CD10 ABS 1KEY LGEEG 400 3809V00596B 3809V00596B BACK COVER ASSEMBLY 1PHONE SY LGEEG EG TOOL 520 6871VMM939X 6871VMM939Y PWB PCB ASSEMBLY MAIN M I MC049B NFULLDE SY CKD 700 0IGL120104A 0IGL120104A IC LG SEMICONDUCTOR CDS SENSOR MODULE P1201 04 913 332 057B 332 057B SCREW DRAWING ASSY HEXAGON HEAD 943 1PTF0403116 1PTF04...

Page 22: ... M FL TP5 22UF STD 16V M FL TP5 47UF STD 25V 20 FL TP 5 0 1UF D 50V 80 20 F Y5V TA52 22UF STD 10V 20 FL TP 5 LOCA NO PART NO DESCRIPTION IC11 IC12 IC13 IC301 IC601 IC801 IC802 IC821 IC822 IC824 IC825 IC826 IC853 IC901 Q104 Q11 Q301 Q401 Q402 Q501 Q502 Q503 Q504 Q505 Q507 Q508 Q510 Q601 Q802 Q803 D301 D403 D405 D406 D407 D501 D502 D503 D504 D601 D602 D603 D604 6927V2070AP 0IMMR00010A 0IFA752700A 0I...

Page 23: ...5V TA52 LOCA NO PART NO DESCRIPTION C538 C540 C541 C542 C543 C546 C547 C548 C550 C552 C553 C602 C603 C604 C605 C606 C607 C608 C609 C610 C611 C612 C613 C614 C615 C616 C617 C618 C619 C620 C625 C626 C627 C632 C636 C803 C804 C806 C807 C809 C810 C811 C815 C816 C817 C818 C819 C820 C821 C822 C823 C824 0CN1040K949 0CE107DD618 0CE107DD618 0CE107DD618 0CE107DD618 0CN1510K519 0CN2710K519 0CN1040K949 0CN1040K...

Page 24: ...0 400UH STAPLE STAPLE STAPLE STAPLE 1P 600MM R R UL1617AWG22 3P 2 5MM 400MM H H UL1007AWG26 3P 2 5MM 800MM R H UL1007 4P 2 5MM 350MM R H UL1007 IL G 03P LGC 2 5MM S T STICK LOCA NO PART NO DESCRIPTION P10A P601 P602 P902 P903 F802 F805 F806 FR401 FR406 FR407 FR408 J211 J402 R102 R109 R11 R110 R111 R112 R113 R12 R124 R126 R127 R13 R14 R15 R16 R17 R18 R19 R20 R202 R212 R24 R25 R252 R253 R26 R28 R29 ...

Page 25: ...1 6 W 5 00 TA52 LOCA NO PART NO DESCRIPTION R543 R555 R557 R558 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 R811 R813 R814 R816 R817 R823 R827 R828 R838 R903 R904 R905 R906 R907 R908 0RD9100F609 0RD6800F609 0RD3301F609 0RD3001F609 0RD0752F609 0RD0221A609 0RD0221A609 0RD0221A609 ...

Page 26: ... 0 05A HORIZONTAL 160G SKHV17910B 12V 0 05A HORIZONTAL 160G SKHV17910B 12V 0 05A HORIZONTAL 160G SKHV17910B 12V 0 05A HORIZONTAL 160G SKHV17910B 12V 0 05A HORIZONTAL 160G SDKEA3 ALPS IEC 250V 8A HORIZONTAL 480G FERRITE BFD3565R2F TAPING FERRITE AXIAL 62MM 1UH NY 3 5X6 0MM FERRITE AXIAL 62MM 1UH NY 3 5X6 0MM FERRITE AXIAL 62MM 1UH NY 3 5X6 0MM FERRITE AXIAL 62MM 1UH NY 3 5X6 0MM SQE2930 36MH 0 5PHY...

Page 27: ......

Page 28: ...Aug 2005 Printed in Korea P NO 38289S0006B ...

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