LG 4230 Service Manual

Download or browse on-line these Service Manual for LG 42LG30 Series Flat Panel TV, LCD TV.

LG 42LG30 Series Manual Information:

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Summary of Contents:

[Page 1] LG 42LG30 Series

LCD TV SERVICE MANUAL CAUTION BEFORE SERVICING THE CHASSIS, READ THE SAFETY PRECAUTIONS IN THIS MANUAL. CHASSIS : LA85D MODEL : 42LG30 42LG30-UD North/Latin America http://aic.lgservice.com Europe/Africa http://eic.lgservice.com Asia/Oceania http://b...

[Page 2] LG 42LG30 Series

Copyright LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only - 2 - CONTENTS CONTENTS .............................................................................................. 2 PRO...

[Page 3] LG 42LG30 Series

Copyright LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only - 3 - SAFETY PRECAUTIONS General Guidance An isolation Transformer should always be used during the servicing of a receiver ...

[Page 4] LG 42LG30 Series

Copyright LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only - 4 - CAUTION: Before servicing receivers covered by this service manual and its supplements and addenda, read and follow th...

[Page 5] LG 42LG30 Series

Copyright LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only - 5 - IC Remove/Replacement Some chassis circuit boards have slotted holes (oblong) through which the IC leads are inserted ...

[Page 6] LG 42LG30 Series

Copyright LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only - 6 - 4. General Specification(TV) No. Item Specification Remark 1. Receiving System ATSC/ NTSC-M 2. Available Channel 1...

[Page 7] LG 42LG30 Series

Copyright LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only - 7 - 5. Chroma & Brightness No Item Min. Typ. Max. Unit Remark 1 White peak brightness 400 500 cd/m 2 42LG30 (Center 1-...

[Page 8] LG 42LG30 Series

Copyright LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only - 8 - No. Specification Remark Resolution H-freq(kHz) V-freq(Hz) Pixel clock(MHz) PC DDC 1. 640*350 31.469 70.08 25.17 DO...

[Page 9] LG 42LG30 Series

Copyright LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only - 9 - ADJUSTMENT INSTRUCTION 1. Application Object These instructions are applied to all of the LCD TV, LA85D. 2. Notes (1) ...

[Page 10] LG 42LG30 Series

3-2. COMPONENT input ADC 3-2-1 Component Gain/Offset Adjustment • Convert to Component in Input-source I2C COMMAND: 0xF4 (SELECT_INPUT) 0x00 0x40 (COMPONENT) cf. 0x10(TV), 0x20(AV), 0x40(COMPONENT), 0x60(RGB), 0x90(HDMI) • Signal equip...

[Page 11] LG 42LG30 Series

Copyright LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only - 11 - 4. EDID (The Extended Display Identification Data)/ DDC(Display Data Channel) Download 4-1. Summary It is establish...

[Page 12] LG 42LG30 Series

Copyright LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only O HDMI-3 [C/S : 8A07] EDID Block 0 table = EDID Block 1 table = O RGB [C/S : F6BC] EDID Block 0 table = EDID Block 1 table =...

[Page 13] LG 42LG30 Series

Copyright LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only - 13 - (3) Adjustment Map 5-4. Adjustment of White Balance (Automatic Adjustment) 1) The adjustment condition should be set ...

[Page 14] LG 42LG30 Series

6. Select the option by country 6-1. Overview 1) The option selection is applied to the North American model only, which selects the rating related country. 2) Applied models: LA84A Chassis applied None USA Model(Canada, Mexico) 6-2. How to select ...

[Page 15] LG 42LG30 Series

Copyright LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only - 15 - TROUBLESHOOTING Power-Up Boot Fail Check P700 All Voltage Level (5V, 12V, 16V) Check Power connector OK ? Replace P...

[Page 16] LG 42LG30 Series

Copyright LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only - 16 - Digital TV Video Check RF Cable Check IC400(LGDT) Output -. AR401, AR402 Y Check Tuner 5V Power IC710 #3 Pin Replac...

[Page 17] LG 42LG30 Series

- 17 - Copyright LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only Analog TV Video Check RF Cable Check CVBS signal TU400 #16 Pin Replace Tuner(TU400) Y N Check Tuner 5V Power IC710 #...

[Page 18] LG 42LG30 Series

- 18 - Copyright LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only Component Video Check input signal format Is it supported? Check signal C1708, C1709, C1710 C1711, C1712, C1713 Repl...

[Page 19] LG 42LG30 Series

- 19 - Copyright LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only RGB Video Check input signal format Is it supported? Check signal, Hsync, Vsync R633, R634 Check other set. If no p...

[Page 20] LG 42LG30 Series

- 20 - Copyright LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only AV Video Check input signal format Is it supported? Check signal C635 (Composite), C634 / C633 (S-Video) (Rear) R61...

[Page 21] LG 42LG30 Series

- 21 - Copyright LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only HDMI Video Check input signal format Is it supported? Y Check JK800 / JK801 / JK903 Replace Jack Y N Y Check HDMI Ca...

[Page 22] LG 42LG30 Series

- 22 - Copyright LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only All Source Audio Make sure you can’t hear any audio Check Output Signal L503, L504 Replace NTP or check output lin...

[Page 23] LG 42LG30 Series

- 23 - Copyright LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only Analog TV Audio Check video output Follow procedure All source audio trouble shooting guide Follow procedure analog...

[Page 24] LG 42LG30 Series

Copyright LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only - 24 - BLOCK DIAGRAM (Video Path) Comp1 (DVD/DTV) Comp2 (DVD/DTV) YPbPr_2 YPbPr_1 AV1 S-AV1 AV2 TU_CVBS AV_1 AV_2 MSTAR (F...

[Page 25] LG 42LG30 Series

- 25 - Copyright LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only IC502 (Audio Path) Comp1 (DVD/DTV) Comp2 (DVD/DTV) Comp1 AV1 AV2 S-AV1 AV_1 AV_2 MSTAR RGB (PC/DTV) RGB HDMI 1 HDMI...

[Page 26] LG 42LG30 Series

- 26 - Copyright LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only Power flow diagram TU401 LGIT TUNER Regulator IC 16V_AUDIO IC711 AS7809 +5V_TUNER 12V Q706 SI3865BDV +5V_GENERAL +5V...

[Page 27] LG 42LG30 Series

- 27 - Copyright LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only Mstar TUNER TDVF-H051F Audio AMP NTP3000A I2C Design Demodulator LGDT3304 I/O exp. M62320 ...

[Page 28] LG 42LG30 Series

- 28 - Copyright LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only EXPLODED VIEW 801 803 805 806 804 802 550 830 540 821 400 521 530 300 120 122 510 500 901 900 121 200 200T 200N Man...