LG 15LC1RB-MG Service Manual Download Page 20 | Manualshive

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No Raster on AV Signal
(Component, CVBS, S-VHS)

No Raster on TV(RF) signal

Change Q113, Q114,
Q115, R194, R198, R184

Check the signal of
Q113, Q114, Q115

R194, R198, R184

Repeat

[A] Process

Check the output of

TU701

Check the

input/output of U301

Check the

input/output of U101

Check input source cable and jack

Fail

Fail

Fail

Fail

Re-soldering or
Change the defect part
Check X301

Fail

Re-soldering or
Change the defect part

Check 5V, 33V of TU701
Re-soldering or
Change the defect part

Pass

Pass

Pass

Pass

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Summary of Contents for 15LC1RB-MG

Page 1: ...ERVICE MANUAL CAUTION BEFORE SERVICING THE CHASSIS READ THE SAFETY PRECAUTIONS IN THIS MANUAL CHASSIS CL 81 MODEL 15LC1RB MG 20LC1RB MG website http biz LGservice com e mail http www LGEservice com techsup html ...

Page 2: ...TENTS 2 PRODUCT SAFETY 3 DISASSEMBLY 6 SPECIFICATION 7 ADJUSTMENT INSTRUCTION 10 ISP MANUAL 13 SVC REMOCON 17 TROUBLE SHOOTING 18 BLOCK DIAGRAM 22 WIRING DIAGRAM 24 EXPLODED VIEW 25 REPLACEMENT PARTS LIST 27 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: ... 6 DISASSEMBLY 1 2 Detached stand assy Remove the screws 3 Disassembly stand assy 4 Detached Backcover Remove the screw 5 Open the Backcover s latch with jig 6 Unlock latch between Cabinet and Backcover ...

Page 7: ... T 12ms F T 13ms LPL NOTE Specifications and others are subject to change without notice for improvement No 1 Product 15LC1R 20LC1R Dimension Width W Lengh D Height H Before Packing 377 6 492 4 242 9 272 7 394 5 482 8 After Packing 433 574 0 143 225 0 442 627 0 2 Product Only SET 5 6Kg 8 7Kg Weight With BOX 7 7Kg 11 1Kg Type ActiveDisplay Area Pixel Pitch mm Electrical Interface Color Depth Size m...

Page 8: ...can O 17 Motion Detection X 18 SRS WOW X 19 Swivel Speaker X 20 EZ pip X 21 ARC X 22 DRP X 23 DCDI X 24 HDCP X Item Remark Specification Viewing Angle CR 10 Luminance Contrast Ratio CIE Color Coordinates EZ Video Clear ACC Normal All White All Black In PC input Contrast 100 Brightness 50 In AV Input PSM Dynamic White 100 IRE R L U D Luminance cd m2 Variation CR Typ 65 65 45 55 350 400 0 283 0 298 ...

Page 9: ... 6 RED 7 GREEN GND 8 BLUE GND 9 N C 10 D GND 11 ID0 GND 12 SDA 13 H SYNC 14 V SYNC 15 SCL SHELL GND 3 Control Functin 1 Contrast Brightness 2 H Position 3 Tracking Clock Phase 4 Auto Configure 5 Reset Item Remark Specification Viewing Angle CR 10 Luminance Contrast Ratio CIE Color Coordinates EZ Video Clear ACC Normal All White All Black In AV Input PSM Dynamic White 100 IRE R L U D Luminance cd m...

Page 10: ...k autocontrol of ADC push menu key for exiting SVC Manu 3 3 1 2 Confirmation We confirm whether 0x00 address of EEPROM 0xA0 is 0xAA or not If 0x00 address of EEPROM 0xA0 isn t 0xAA we adjust once more We can confirm the ADC values from 0x06 0x0B addresses in a page 0xA0 3 3 2 AV CVBS Mode Adjustment 3 3 2 1 Auto Gain Offset Adjustment Select AV Video in Input menu Signal equipment MSPG925 Output J...

Page 11: ...1 Factory default Shipping condition DDC Communications DDC2B 4 Total Assembly line process 4 1 Adjustment Preparation IIC_ SW must set 0 Above 30 minutes H run in RF no signal 15 Pin D Sub Jack is connected to the signal of Pattern Generator 4 2 Confirmation of Luminance Set Statement Input CVBS Contrast 100 Max Brightness 50 CSM Normal Signal equipment displays Output Voltage 700 mVp p Output Mo...

Page 12: ...ase Fine 0 Ficture EZ Video Clear ACC Normal Only USA Sound AVL Off Balance 0 Timer Clock Auto Off Timer Off On Timer TV 2 Volume 30 Off Auto Off Off Special Language English Input TV Key lock Off Power indicator On Caption Text CC1 Canada Captions Off USA Only Parental To set Code 0000 Screen Auto Configure To Set Only Manual Configure To Set RGB PC Reset To Set INPUT ...

Page 13: ...ecking execute WISP program 2 Compare LOC version in BOM with version of hexfile 3 Push Browse in WISP program and select hex file 1 4 Push Auto Execute after loading file 2 5 After Writing Flash memory check OK message 3 6 After finishing ISP turn OFF Main Power AC switch and then turn ON the switch 7 Red LED is blinking during writing default value in EEPROM 24C32 after turn on the switch 8 ALL ...

Page 14: ...omatic mode on to manual mode and then push Enter ISP Mode 2 As soon as turn on AC power push Send quickly and again Check the following message in ISP status If ISP status is not ready try again from AC power on 3 After Entering ISP mode Push Erase Flash and Send Take turns 1 4 If Erase Flash is not OK try again Erase Flash Check all OK ...

Page 15: ...d Take turns 8 9 Finally Turn off and on Main AC Power and wait for ending LED blinking SEDNA ISP Mode Push IN START IN STOP TILT TILT at Service remocon in order then ST BY Red will be blinking If SET ON LED Green blinks please push TILT key once SEDNA Download 1 After LED checking execute ISP_Tool program 2 Push Identity and check connection message Check all OK filename hex ...

Page 16: ...d select hex file 1 4 Push Erase Program Verify Restart System after loading file Take turns 2 5 5 Check whether each stage 2 5 is successful in message box 6 After finishing ISP turn OFF Main Power AC switch and then turn ON the switch ...

Page 17: ...o move channel up down or to select a functiondisplayed on the screen 16 VOL To adjust the volume or accurately control a specific function 17 ENTER To set a specific function or complete setting 18 CH OP1 To use as a red key in the teletext mode 19 CH OP2 To use as a green key in the teletext mode 20 SWAP OP3 To use as a yellow key in the teletext mode 21 INPUT OP4 To use as a blue key in the tel...

Page 18: ...off Check short of main B D or Change Lips Change U406 Change LED Assy Check 15V or 5V of Lips Check Output of U406 Check LED Assy Check J103 J125 J126 Connector Fail Fail Change Q402 Check Output of Q402 Fail Pass Fail Pass Pass Pass A Process ...

Page 19: ...7 U409 Check inverter Connector or inverter Check input source cable and jack Repeat A PROCESS Fail Change U401 U405 U407 U409 Fail Change U301 Fail Change inverter connector or inverter Fail Change panel link cable or module Fail Check panel link Cable or module Pass Pass Pass Pass Pass B Process ...

Page 20: ...R194 R198 R184 Repeat A Process Check the output of TU701 Check the input output of U301 Check the input output of U101 Check input source cable and jack Fail Fail Fail Fail Re soldering or Change the defect part Check X301 Fail Re soldering or Change the defect part Check 5V 33V of TU701 Re soldering or Change the defect part Pass Pass Pass Pass ...

Page 21: ...input Check the input source Fail Pass Re soldering or Change the defect part Check X301 Check the input output of U301 Fail Pass Re soldering or Change the defect part Check the input output of U201 Fail Pass Change speaker Check the speaker Fail Pass ...

Page 22: ... 22 BLOCK DIAGRAM ...

Page 23: ...l like Contrast Brightness Sharpness Color tint signals including Adaptive Comb Filter 2 Audio Decoder This block analyzes audio input signal through A V Jack and PC audio and Tuner IF The analyzed signals transmitted to audio amplifier On decoding We can control signal like Bass treble 3 IF Decoder This block can change IF signal to audio and video signal that transmitted to Video audio decoder 4...

Page 24: ...L 6631T20037Q 3P 20LC1RB 6631900024D 3P 6631T20034M 11P 20LC1RB 6631T20029S 5P 6631900026A 4P 20LC1RB 6631900026A 4P 20LC1RB 1 INTERFACE BOARD Only 20LC1R _LPL Module 6631T20010F 3P 15LC1RB 6631T20012R 20P 15LC1RB 6631T20042B 11P 15LC1RB 663190002B 4P 15LC1RB 6631900026B 4P 15LC1RB ...

Page 25: ... 25 EXPLODED VIEW 010 060 020 070 080 090 100 030 040 130 120 110 120 041 042 050 ...

Page 26: ...B PCB ASSEMBLY SUB SUB T T CL81 2XLC1 ALEULFX CONTROL 68719ST798B PWB PCB ASSEMBLY SUB SUB T T CL81 2XLC1 SLEELFP CONTROL SKD 68719ST801A PWB PCB ASSEMBLY SUB SUB T T CL81 1XLC1 ANEULFX CONTROL 68719ST956A PWB PCB ASSEMBLY SUB SUB T T CL81 15LC1R SNRULFT CONTROL SKD 49519S0001A METAL ASSEMBLY FRAME 20LC1 49519S0001B METAL ASSEMBLY FRAME 20LC1R ZG C SKD 49519S0004B METAL ASSEMBLY FRAME MAIN ASSY 15...

Page 27: ...PART NO DESCRIPTION SPECIFICATION C238 0CH5102K416 1000PF 50V 5 NP0 2012 R TP C239 0CH5102K416 1000PF 50V 5 NP0 2012 R TP C3001 0CH3104K566 0 1UF 50V 10 X7R 2012 R TP C3002 0CH3104K566 0 1UF 50V 10 X7R 2012 R TP C3011 0CH3103K516 10000PF 50V 10 B Y5P 2012 C3013 0CH3104K566 0 1UF 50V 10 X7R 2012 R TP C3022 0CH3474H946 0 47UF 25V 80 20 F Y5V C3026 0CH3474H946 0 47UF 25V 80 20 F Y5V C3051 0CH3104K566...

Page 28: ...104CK56A 0 1UF 1608 50V 10 R TP X7R C355 0CK104CK56A 0 1UF 1608 50V 10 R TP X7R DATE 2006 02 01 S AL LOC NO PART NO DESCRIPTION SPECIFICATION C356 0CK104CK56A 0 1UF 1608 50V 10 R TP X7R C357 0CK104CK56A 0 1UF 1608 50V 10 R TP X7R C369 0CK224CF56A 0 22UF 1608 16V 10 R TP X7 C372 0CK104CK56A 0 1UF 1608 50V 10 R TP X7R C380 0CK104CK56A 0 1UF 1608 50V 10 R TP X7R C381 0CK104CK56A 0 1UF 1608 50V 10 R T...

Page 29: ...OD323 15LC1RB ZD113 0DZ560009DA UDZ S 5 6B TP ROHM K SOD323 15LC1RB ZD114 0DZ560009DA UDZ S 5 6B TP ROHM K SOD323 15LC1RB DATE 2006 02 01 S AL LOC NO PART NO DESCRIPTION SPECIFICATION ZD115 0DZ560009DA UDZ S 5 6B TP ROHM K SOD323 15LC1RB ZD130 0DZ560009DA UDZ S 5 6B TP ROHM K SOD323 ZD131 0DZ560009DA UDZ S 5 6B TP ROHM K SOD323 ZD136 0DZ560009DA UDZ S 5 6B TP ROHM K SOD323 ZD137 0DZ560009DA UDZ S ...

Page 30: ...05 0RHZTCZ001D RCA SMART 22OHM 1 16 W 5 3 20LC1RB RA706 0RHZTCZ001D RCA SMART 22OHM 1 16 W 5 3 20LC1RB R776 0RX0202K665 20 OHM 2 W 5 SF15 C740 0RH0000D622 0 OHM 1 10 W 2012 5 00 D R1001 0RH4701D622 4 7K OHM 1 10 W 2012 5 00 R1002 0RH1002D622 10K OHM 1 10 W 2012 5 00 R1005 0RH4701D622 4 7K OHM 1 10 W 2012 5 00 R1006 0RH1002D622 10K OHM 1 10 W 2012 5 00 R1009 0RH4701D622 4 7K OHM 1 10 W 2012 5 00 R1...

Page 31: ...10 W 2012 5 00 R348 0RH1201D622 1 2K OHM 1 10 W 2012 5 00 DATE 2006 02 01 S AL LOC NO PART NO DESCRIPTION SPECIFICATION R349 0RH0102D622 10 OHM 1 10 W 2012 5 00 R350 0RH1002D622 10K OHM 1 10 W 2012 5 00 R352 0RH1000D622 100 OHM 1 10 W 2012 5 00 R367 0RH1002D622 10K OHM 1 10 W 2012 5 00 R369 0RH1002D622 10K OHM 1 10 W 2012 5 00 R388 0RH1002D622 10K OHM 1 10 W 2012 5 00 R389 0RH4701D622 4 7K OHM 1 1...

Page 32: ...382 0RJ1002D677 10K OHM 1 10 W 5 1608 R TP R383 0RJ1502D677 15K OHM 1 10 W 5 1608 R TP R384 0RJ0332D677 33 OHM 1 10 W 5 1608 R TP R385 0RJ1002D677 10K OHM 1 10 W 5 1608 R TP R386 0RJ1502D677 15K OHM 1 10 W 5 1608 R TP R387 0RJ0332D677 33 OHM 1 10 W 5 1608 R TP DATE 2006 02 01 S AL LOC NO PART NO DESCRIPTION SPECIFICATION R399 0RJ0332D677 33 OHM 1 10 W 5 1608 R TP R410 0RJ2202D677 22K OHM 1 10 W 5 ...

Page 33: ...RIPTION SPECIFICATION ZD502 0DZ560009DA UDZ S 5 6B TP ROHM K SOD323 ZD503 0DZ560009DA UDZ S 5 6B TP ROHM K SOD323 ZD504 0DZ560009DA UDZ S 5 6B TP ROHM K SOD323 ZD505 0DZ560009DA UDZ S 5 6B TP ROHM K SOD323 IR 3508V00069A PLATE CF 29H40 LED 33 ...

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Page 39: ...Jan 2006 Printed in Korea P NO 38289S0043T ...

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