LG 23LC1RB-MB Service Manual Download Page 14 | Manualshive

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No Raster

Check LED Status

on display unit

Check the input/

Output of IC300

Check

L300, L301, L302

Check inverter

Connector or inverter

Check input source cable and jack

Repeat A PROCESS

Fail

Change
L300, L301, L302

Fail

Change IC300

Fail

Change inverter
connector or inverter

Fail

Change panel link
cable or module

Fail

Change module

Fail

Check panel link
Cable or module

Pass

Pass

Pass

Pass

:[B]Process

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Summary of Contents for 23LC1RB-MB

Page 1: ...TV SERVICE MANUAL CAUTION BEFORE SERVICING THE CHASSIS READ THE SAFETY PRECAUTIONS IN THIS MANUAL CHASSIS ML 041G MODEL 23LC1RB MB website http biz LGservice com e mail http www LGEservice com techsup html ...

Page 2: ...2 CONTENTS CONTENTS 2 PRODUCT SAFETY 3 SPECIFICATION 7 ADJUSTMENT INSTRUCTION 11 SVC REMOCON 12 TROUBLE SHOOTING 13 BLOCK DIAGRAM 18 WIRING DIAGRAM 20 EXPLODED VIEW 21 REPLACEMENT PARTS LIST 23 SVC SHEET ...

Page 3: ...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 ohm meter to the AC plug prongs tied together and touch other ohm meter lead in turn to each exposed metallic parts such as antenna terminals phone jacks etc If the exposed metallic part has a ...

Page 4: ...y obtain and wear a commercially available discharging wrist strap device which should be removed to prevent potential shock reasons prior to applying power to the unit under test 2 After removing an electrical assembly equipped with ES devices place the assembly on a conductive surface such as aluminum foil to prevent electrostatic charge buildup or exposure of the assembly 3 Use only a grounded ...

Page 5: ...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 leads of replacement component around notch at stake top 3 Solder the connections CAUTION Maintain original spacing between the replaced component and adjacent components and the circuit boa...

Page 6: ...ard for this chassis is followed a special standard 3 General Specification NOTE Specifications and others are subject to change without notice for improvement LCD Module Feature Type TFT Color LCD Module Active Display Area 22 95inch 582 96mm diagonal Pixel Pitch mm 0 124mm H x 0 372mm V x RGB Electrical Interface TFT Color Depth 8bit 16 7M color Size mm 546 H x 318 3 V x42 1 D LPL Surface Treatm...

Page 7: ... Commercial Model 9 Discrete IR 1 Only Commercial Model 10 2 Carrier Stereo BG DK 11 NICAM Stereo BG I LL 12 2 Carrier Dual BG DK 13 NICAM Dual BG I LL 14 DW Double Window Mode X 15 MW Multi Window Mode X 16 Film Mode X 17 Noise Reduction X 18 Progressive Scan O 19 Motion Detection X 20 SRS WOW X 21 Swivel Speaker X 22 EZ pip X 23 ARC O 24 DRP X 25 DCDI X 26 HDCP X No Item Content Remark 1 Product...

Page 8: ...s 60 Color 70 Sharpness 70 Tint 0 10 Sound DASP EZ Audio Flat AVL Off Balance 0 11 Time Clock Auto Off Time None On Time None Auto Time None 12 Special Language English Caption Text CC1 USA Canada Only Caption Off Ley Lock Off Parebtak Lock Off USA Canada Only Set Password None MPAA Unblocked Age Block None Content Lock Aux Block Unblocked Canadian None Canada Only Power Indicator On 13 PC H Posit...

Page 9: ...osition V Position 3 Tracking Clock Phase 4 Auto Configure RESET 4 Component Jack 1 Y MB TB rear 3 Pb ZB side 5 Pr 5 D2 Jack 1 Y 2 Y GND JAPAN Only 525i 525p 3 Pb 4 Pb GND 5 Pr 6 Pr GND 7 Line1 Ready 8 LINE1 9 LINE2 10 Line2 Ready 11 LINE3 12 SWITCH GND 13 Line3 Ready 14 SWITCH No Item Specification Remark LPL 1 Viewing Angle R L 178 178 Typical min 176 CR 10 U D 178 178 2 Luminance Luminance cd m...

Page 10: ... 44 96 59 94 HDTV 720p TB MB 8 1920x1080 31 25 50 00 HDTV 1080i 50Hz Only AU TB 9 1920x1080 33 75 60 00 HDTV 1080i 60Hz ATSC TB MB 10 1920x1080 33 72 59 94 HDTV 1080i 59 94Hz TB MB 9 Component Video Input Y PB PR No Resolution H freq kHz V freq kHz Pixel clock MHz Remarks Analog RGB Digital RGB 1 640x480 31 469 59 94 25 17 VESA VGA 2 800x600 37 879 60 31 40 00 VESA SVGA 3 1024x768 48 363 60 00 65 ...

Page 11: ...Pb Pr Output Signal of Pattern Generator MSPG 925 SERISE 3 2 2 2 Auto Gain Offset Adjustment Convert to Component Mode in Input Mode Select MODEL 228 480p Mode Y 100 Pb Pr 75 in Pattern Generator Select PATTERN 33 Color Bar Pattern signal in Pattern Generator MSPG 925 SERISE Press IN START Key by using the Remote Controller SVC after converting to Adjustment Mode press VOL Key consecutively in Aut...

Page 12: ...put To check the front AV To move channel up down or to select a function displayed on the screen To adjust the volume or accurately control a specific function To set a specific function or complete setting To move the channel down in the PIP screen To use as a red key in the teletext mode To move the channel in the PIP screen To use as a green key in the teletext mode To switch between the main ...

Page 13: ...er LED indicator off Check short of main B D or Change Lips Change IC604 IC607 Change LED Assy Check 15V or 5V of Lips Check Output of IC604 IC607 Check LED Assy Check P701 Connector Fail Fail Pass Fail Pass Pass Pass A Process ...

Page 14: ...Check inverter Connector or inverter Check input source cable and jack Repeat A PROCESS Fail Change L300 L301 L302 Fail Change IC300 Fail Change inverter connector or inverter Fail Change panel link cable or module Fail Change module Fail Check panel link Cable or module Pass Pass Pass Pass B Process ...

Page 15: ...Process Check the input output of IC100 Check the input output of IC300 Check input source cable and jack Fail Re soldering or Change the defect part Check X100 Fail Re soldering or Change the defect part Check X300 Fail Pass Pass Pass Check the input output of IC200 Re soldering or Change the defect part Fail Pass ...

Page 16: ...103 L710 L713 L714 Repeat A Process Check the output of TU1000 Check the input output of IC100 Check input source cable and jack Fail Fail Fail Fail Re soldering or Change the defect part Chek X100 Check 5V 33V of TU1000 Re soldering or Change the defect part Pass Pass Check the input output of IC300 Fail Re soldering or Change the defect part Check X300 Pass Pass ...

Page 17: ...Fail Pass Re soldering Check the input output of IC801 Fail Pass Re soldering or Change the defect part Check X100 Check the input output of IC100 Fail Pass Re soldering or Change the defect part Check the input output of IC400 Fail Pass Change speaker Check the speaker Fail Pass ...

Page 18: ... Gm2221 IC300 VCTI IC1 BA7657F IC200 AUDIO AMP DDC FET S VIDEO D SUB SAW ROM 656 FORMATE LVDS OUT main15V ST5V TU33V Y PB PR R G B R G B IF To P5103 AC IN P O W E R SIDE BOARD L R HP jack PC audio Video Audio TU jack From side board ...

Page 19: ...LCD module as a TTL output VCTi is the main microprocessor that handles video signal processing and sound signal processing It also manages the RF signals received from the tuner The scaler can control timing to fit into the LCD panel and can also control the size and position of the input signal 2 Power Supply Unit The power supply unit provides 15V and 5V DC power to the mainboard The PWM Step U...

Page 20: ... 20 WIRING DIAGRAM 6631900047A 14P 6631900123A 14P 6631900050A 10P 6631T20029S 5P 6631T20037Q 3P 6631T25019J 4P 6631T20037Q 3P 6631T11016Q 30P ...

Page 21: ... 21 EXPLODED VIEW 010 020 060 080 120 030 040 140 130 070 050 090 100 110 ...

Page 22: ...1R CONTROL TOTAL ASSY 6400GKTX01B Speaker Fullrange F1527C 6428 2 FERRITE 7W 8OHM 84DB 210HZ 71X41X28mM LUG 49519S0032B Plate Assembly FRAME 49509S0031 23LC1R NARROW C SKD 6871TPT326E PCB Assembly Power POWER T T TOTAL 23LC1 BLUE BIRD 23INCH WAFER 33139N2028A Main Total Assembly 23LC1R ME NTSC BRAND ML 041E CI CHASSIS 68719ST107B PCB Assembly Sub SUB T T ML041E 23LC1R MB CI NTSC SIDE A V ASSY 4951...

Page 23: ...K104CK56A 0603B104K500CT 100nF 10 50 C117 0CK104CK56A 0603B104K500CT 100nF 10 50 C120 0CC390CK41A C1608C0G1H390JT 39pF 5 50V C121 0CC390CK41A C1608C0G1H390JT 39pF 5 50V C122 0CK104CK56A 0603B104K500CT 100nF 10 50 C124 0CK104CK56A 0603B104K500CT 100nF 10 50 C125 0CK104CK56A 0603B104K500CT 100nF 10 50 C126 0CK104CK56A 0603B104K500CT 100nF 10 50 C128 0CK822CK56A C1608X7R1H822KT 8 2nF 10 5 C129 0CK822...

Page 24: ...2012Y5V225ZFT 2 2uF 20TO C420 0CK224DH56A 0805B224K250CT 220nF 10 25 C421 0CK225DH94A C2012Y5V225ZFT 2 2uF 20TO C422 0CK225DH94A C2012Y5V225ZFT 2 2uF 20TO DATE 2006 04 26 S AL LOC NO PART NO DESCRIPTION SPECIFICATION C423 0CK224DH56A 0805B224K250CT 220nF 10 25 C424 0CK105DK94A 0805F105Z500CT 1uF 20TO 80 C425 0CK105DK94A 0805F105Z500CT 1uF 20TO 80 C426 0CK105DK94A 0805F105Z500CT 1uF 20TO 80 C428 0C...

Page 25: ... 15UH 20 DATE 2006 04 26 S AL LOC NO PART NO DESCRIPTION SPECIFICATION Q603 0TF492509AA SI4925DY P CHANNEL 30V 2 Q101 0TR388109AA KTC3881 NPN 4V 30V 25V 50MA Q103 0TRIY80001A 2SC3052 NPN 6V 50V 50V 200M Q302 0TRIY80001A 2SC3052 NPN 6V 50V 50V 200M Q400 0TRIH80002A 2SA1530A T112 1R PNP 6V 6 Q401 0TRIY80001A 2SC3052 NPN 6V 50V 50V 200M Q402 0TRIY80001A 2SC3052 NPN 6V 50V 50V 200M Q403 0TRIY80001A 2S...

Page 26: ...560OHM 5 1 10 R350 0RJ1000D677 MCR03EZPJ101 100OHM 5 1 10 R351 0RJ1001D677 MCR03EZPJ102 1KOHM 5 1 10W DATE 2006 04 26 S AL LOC NO PART NO DESCRIPTION SPECIFICATION R352 0RJ0000D677 MCR03EZPJ000 0OHM 5 1 10W R401 0RJ1001D677 MCR03EZPJ102 1KOHM 5 1 10W R403 0RJ0000D677 MCR03EZPJ000 0OHM 5 1 10W R404 0RJ1002D677 MCR03EZPJ103 10KOHM 5 1 10 R405 0RJ0000D677 MCR03EZPJ000 0OHM 5 1 10W R406 0RJ7501D677 MC...

Page 27: ... 100OHM 5 1 10 RR608 0RJ4701D677 MCR03EZPJ472 4 7KOHM 5 1 1 R600 0RX0912K665 RSD02F4J91R0 91OHM 5 2W 12 IC302 6620F00017A CCSD 32T SM 32P 1 27MM SMD X100 6202TST003C HC 49 SM5H 20 25MHZ 50PPM 2 X300 6202VDT002B SX 1 14 31818MHZ 30PPM 14 3 TU1000 6700NFNS11J TAEA H051P NTSC 55 25HZTO3 ZD504 0DZ560009CF MTZJ5 6B 5 6V 5 45TO5 73V 4 U501 6712SCA232A TSOP34838SO1 2 7TO5 5V 1 5M LED551 0DLBE0048AA BL HK...

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Page 30: ...Apr 2006 Printed in Korea P NO 38289S0004 ...

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