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LED TV SERVICE MANUAL
CHASSIS : LB35B
MODEL : 32LN51**
CAUTION
32LN51**-T*
BEFORE SERVICING THE CHASSIS, READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
P/NO : MFL67732801 (1302-REV00)
Printed in Korea
CONTENTS
CONTENTS .............................................................................................. 2 SAFETY PRECAUTIONS ........................................................................ 3 SERVICING PRECAUTIONS.................................................................... 4 SPECIFICATION ....................................................................................... 6 ADJUSTMENT INSTRUCTION ................................................................ 9 BLOCK DIAGRAM.................................................................................. 13 EXPLODED VIEW .................................................................................. 14 SCHEMATIC CIRCUIT DIAGRAM ..............................................................
Copyright © LG Electronics. Inc. All rights reserved. Only for training and service purposes
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LGE Internal Use Only
SAFETY PRECAUTIONS
IMPORTANT SAFETY NOTICE
Many electrical and mechanical parts in this chassis have special safety-related characteristics. These parts are identified by in the Schematic Diagram and Exploded View. It is essential that these special safety parts should be replaced with the same components as recommended in this manual to prevent Shock, Fire, or other Hazards. Do not modify the original design without permission of manufacturer.
General Guidance
An isolation Transformer should always be used during the servicing of a receiver whose chassis is not isolated from the AC power line. Use a transformer of adequate power rating as this protects the technician from accidents resulting in personal injury from electrical shocks. It will also protect the receiver and it's components from being damaged by accidental shorts of the circuitry that may be inadvertently introduced during the service operation. If any fuse (or Fusible Resistor) in this TV receiver is blown, replace it with the specified. When replacing a high wattage resistor (Oxide Metal Film Resistor, over 1 W), keep the resistor 10 mm away from PCB. Keep wires away from high voltage or high temperature parts.
Leakage Current Hot Check (See below Figure)
Plug the AC cord directly into the AC outlet. Do not use a line Isolation Transformer during this check. Connect 1.5 K / 10 watt resistor in parallel with a 0.15 uF capacitor between a known good earth ground (Water Pipe, Conduit, etc.) and the exposed metallic parts. Measure the AC voltage across the resistor using AC voltmeter with 1000 ohms/volt or more sensitivity. Reverse plug the AC cord into the AC outlet and repeat AC voltage measurements for each exposed metallic part. Any voltage measured must not exceed 0.75 volt RMS which is corresponds to 0.5 mA. In case any measurement is out of the limits specified, there is possibility of shock hazard and the set must be checked and repaired before it is returned to the customer.
Leakage Current Hot Check circuit
Before returning the receiver to the customer,
always 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 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 return path to the chassis, the measured resistance should be between 1 M and 5.2 M. When the exposed metal has no return path to the chassis the reading must be infinite. An other abnormality exists that must be corrected before the receiver is returned to the customer.
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LGE Internal Use Only
SERVICING PRECAUTIONS
CAUTION: Before servicing receivers covered by this service manual and its supplements and addenda, read and follow the SAFETY PRECAUTIONS on page 3 of this publication. NOTE: If unforeseen circumstances create conflict between the following servicing precautions and any of the safety precautions on page 3 of this publication, always follow the safety precautions. Remember: Safety First. General Servicing Precautions 1. Always unplug the receiver AC power cord from the AC power source before; a. Removing or reinstalling any component, circuit board module or any other receiver assembly. b. Disconnecting or reconnecting any receiver electrical plug or other electrical connection. c. Connecting a test substitute in parallel with an electrolytic capacitor in the receiver. CAUTION: A wrong part substitution or incorrect polarity installation of electrolytic capacitors may result in an explosion hazard. 2. Test high voltage only by measuring it with an appropriate high voltage meter or other voltage measuring device (DVM, FETVOM, etc) equipped with a suitable high voltage probe. Do not test high voltage by "drawing an arc". 3. Do not spray chemicals on or near this receiver or any of its assemblies. 4. Unless specified otherwise in this service manual, clean electrical contacts only by applying the following mixture to the contacts with a pipe cleaner, cotton-tipped stick or comparable non-abrasive applicator; 10 % (by volume) Acetone and 90 % (by volume) isopropyl alcohol (90 % - 99 % strength) CAUTION: This is a flammable mixture. Unless specified otherwise in this service manual, lubrication of contacts in not required. 5. Do not defeat any plug/socket B+ voltage interlocks with which receivers covered by this service manual might be equipped. 6. Do not apply AC power to this instrument and/or any of its electrical assemblies unless all solid-state device heat sinks are correctly installed. 7. Always connect the test receiver ground lead to the receiver chassis ground before connecting the test receiver positive lead. Always remove the test receiver ground lead last. 8. Use with this receiver only the test fixtures specified in this service manual. CAUTION: Do not connect the test fixture ground strap to any heat sink in this receiver. Electrostatically Sensitive (ES) Devices Some semiconductor (solid-state) devices can be damaged easily by static electricity. Such components commonly are called Electrostatically Sensitive (ES) Devices. Examples of typical ES devices are integrated circuits and some field-effect transistors and semiconductor "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 electrostatic charge on your body by touching a known earth ground. Alternatively, 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.
Copyright © LG Electronics. Inc. All rights reserved. Only for training and service purposes
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-tip soldering iron to solder or unsolder ES devices. 4. Use only an anti-static type solder removal device. Some solder removal devices not classified as "anti-static" can generate electrical charges sufficient to damage ES devices. 5. Do not use freon-propelled chemicals. These can generate electrical charges sufficient to damage ES devices. 6. Do not remove a replacement ES device from its protective package until immediately before you are ready to install it. (Most replacement ES devices are packaged with leads electrically shorted together by conductive foam, aluminum foil or comparable conductive material). 7. Immediately before removing the protective material from the leads of a replacement ES device, touch the protective material to the chassis or circuit assembly into which the device will be installed. CAUTION: Be sure no power is applied to the chassis or circuit, and observe all other safety precautions. 8. Minimize bodily motions when handling unpackaged replacement ES devices. (Otherwise harmless motion such as the brushing together of your clothes fabric or the lifting of your foot from a carpeted floor can generate static electricity sufficient to damage an ES device.) General Soldering Guidelines 1. Use a grounded-tip, low-wattage soldering iron and appropriate tip size and shape that will maintain tip temperature within the range or 500 °F to 600 °F. 2. Use an appropriate gauge of RMA resin-core solder composed of 60 parts tin/40 parts lead. 3. Keep the soldering iron tip clean and well tinned. 4. Thoroughly clean the surfaces to be soldered. Use a mall wirebristle (0.5 inch, or 1.25 cm) brush with a metal handle. Do not use freon-propelled spray-on cleaners. 5. Use the following unsoldering technique a. Allow the soldering iron tip to reach normal temperature. (500 °F to 600 °F) b. Heat the component lead until the solder melts. c. Quickly draw the melted solder with an anti-static, suctiontype solder removal device or with solder braid. CAUTION: Work quickly to avoid overheating the circuit board printed foil. 6. Use the following soldering technique. a. Allow the soldering iron tip to reach a normal temperature (500 °F to 600 °F) b. First, hold the soldering iron tip and solder the strand against the component lead until the solder melts. c. Quickly move the soldering iron tip to the junction of the component lead and the printed circuit foil, and hold it there only until the solder flows onto and around both the component lead and the foil. CAUTION: Work quickly to avoid overheating the circuit board printed foil. d. Closely inspect the solder area and remove any excess or splashed solder with a small wire-bristle brush.
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LGE Internal Use Only
IC Remove/Replacement Some chassis circuit boards have slotted holes (oblong) through which the IC leads are inserted and then bent flat against the circuit foil. When holes are the slotted type, the following technique should be used to remove and replace the IC. When working with boards using the familiar round hole, use the standard technique as outlined in paragraphs 5 and 6 above. Removal 1. Desolder and straighten each IC lead in one operation by gently prying up on the lead with the soldering iron tip as the solder melts. 2. Draw away the melted solder with an anti-static suction-type solder removal device (or with solder braid) before removing the IC. Replacement 1. Carefully insert the replacement IC in the circuit board. 2. Carefully bend each IC lead against the circuit foil pad and solder it. 3. Clean the soldered areas with a small wire-bristle brush. (It is not necessary to reapply acrylic coating to the areas). "Small-Signal" Discrete Transistor Removal/Replacement 1. Remove the defective transistor by clipping its leads as close as possible to the component body. 2. Bend into a "U" shape the end of each of three leads remaining on the circuit board. 3. Bend into a "U" shape the replacement transistor leads. 4. Connect the replacement transistor leads to the corresponding leads extending from the circuit board and crimp the "U" with long nose pliers to insure metal to metal contact then solder each connection. Power Output, Transistor Device Removal/Replacement 1. Heat and remove all solder from around the transistor leads. 2. Remove the heat sink mounting screw (if so equipped). 3. Carefully remove the transistor from the heat sink of the circuit board. 4. Insert new transistor in the circuit board. 5. Solder each transistor lead, and clip off excess lead. 6. Replace heat sink. Diode Removal/Replacement 1. Remove defective diode by clipping its leads as close as possible to diode body. 2. Bend the two remaining leads perpendicular y to the circuit board. 3. Observing diode polarity, wrap each lead of the new diode around 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 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 board to prevent excessive component temperatures. Circuit Board Foil Repair Excessive heat applied to the copper foil of any printed circuit board will weaken the adhesive that bonds the foil to the circuit board causing the foil to separate from or "lift-off" the board. The following guidelines and procedures should be followed whenever this condition is encountered. At IC Connections To repair a defective copper pattern at IC connections use the following procedure to install a jumper wire on the copper pattern side of the circuit board. (Use this technique only on IC connections). 1. Carefully remove the damaged copper pattern with a sharp knife. (Remove only as much copper as absolutely necessary). 2. carefully scratch away the solder resist and acrylic coating (if used) from the end of the remaining copper pattern. 3. Bend a small "U" in one end of a small gauge jumper wire and carefully crimp it around the IC pin. Solder the IC connection. 4. Route the jumper wire along the path of the out-away copper pattern and let it overlap the previously scraped end of the good copper pattern. Solder the overlapped area and clip off any excess jumper wire. At Other Connections Use the following technique to repair the defective copper pattern at connections other than IC Pins. This technique involves the installation of a jumper wire on the component side of the circuit board. 1. Remove the defective copper pattern with a sharp knife. Remove at least 1/4 inch of copper, to ensure that a hazardous condition will not exist if the jumper wire opens. 2. Trace along the copper pattern from both sides of the pattern break and locate the nearest component that is directly connected to the affected copper pattern. 3. Connect insulated 20-gauge jumper wire from the lead of the nearest component on one side of the pattern break to the lead of the nearest component on the other side. Carefully crimp and solder the connections. CAUTION: Be sure the insulated jumper wire is dressed so the it does not touch components or sharp edges.
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LGE Internal Use Only
NOTE : Specifications and others are subject to change without notice for improvement.
SPECIFICATION
1. Application range
This specification is applied to the LB35B chassis.
3. Test method
2. Requirement for Test
Each part is tested as below without special appointment. (1) Temperature: 25 °C ± 5 °C(77 °F ± 9 °F), CST: 40 °C ± 5 °C (2) Relative Humidity: 65 % ± 10 % (3) Power Voltage : Standard input voltage (AC 100-240 V~, 50/60 Hz) * Standard Voltage of each products is marked by models. (4) Specification and performance of each parts are followed each drawing and specification by part number in accordance with BOM. (5) The receiver must be operated for about 5 minutes prior to the adjustment.
1) Performance: LGE TV test method followed 2) Demanded other specification - Safety : CE, IEC specification - EMC : CE, IEC
4. Model General Specification
No. 1. 2. Market Broadcasting system BAND 3. 4. 5. 6. 7. 8. 9. 10. 11. Channel Storage Receiving system Video Input Component Input USB Input AV Audio Output D-SUB INPUT HDMI Input Audio Input (1EA) VHF/UHF Cable Item
* HDMI 1.4 with Deep Color is only apply for FHD Model Specification NON EU PAL/SECAM B/G/D/K PAL-I NTSC-M PAL(BG,I) 01-C69 S1~S47 Upper Heterodyne PAL, SECAM, NTSC Y/Cb/Cr, Y/Pb/Pr MP3, JPEG,Movie RF/AV/HDMI Audio Output S/W Upgrade Only HDMI-DTV, Only PCM MODE AV&Component Rear (2EA) Rear (1EA) Side(1EA) Rear (1EA) Rear (1EA) Rear (2EA) L/R Input(2EA) NTSC(M) 2~78 1~71 China(DK) C1~C69 S1~S47 Remarks
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LGE Internal Use Only
5. Component Video Input (Y, PB, PR)
No. 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14. 15. Resolution 720*480 720*480 720*576 720*480 720*480 720*576 1280*720 1280*720 1280*720 1920*1080 1920*1080 1920*1080 1920*1080 1920*1080 1920*1080 H-freq(kHz) 15.73 15.75 15.625 31.47 31.50 31.25 44.96 45.00 37.50 28.125 33.72 33.75 56.25 67.432 67.5 V-freq(Hz) 59.94 60.00 50.00 59.94 60.00 50.00 59.94 60.00 50.00 50.00 59.94 60.00 50 59.94 60.00 Pixel clock(MHz) 13.500 13.514 13.500 27.000 27.027 27.000 74.176 74.250 74.25 74.250 74.176 74.25 148.5 148.350 148.5 Proposed SDTV, DVD 480I(525I) SDTV, DVD 480I(525I) SDTV, DVD 576I(625I) 50Hz SDTV 480P SDTV 480P SDTV 576P 50Hz HDTV 720P HDTV 720P HDTV 720P 50Hz HDTV 1080I 50Hz, HDTV 1080I HDTV 1080I HDTV 1080P HDTV 1080P HDTV 1080P
6. HDMI Input
6.1. PC Mode
No. 1. 2. 3. 4. 5. 6 7. 8. 640×480 800×600 1024×768 1280×768 1360×768 1366×768 1280×1024 1920×1080 * Spec. out but it can be shown the picture at only HDMI/DVI IN 1 via DVI to HDMI Cable Resolution H-freq(kHz) 31.469 37.879 48.363 47.776 47.72 47.7 63.595 66.647 V-freq.(Hz) 59.94 60.317 60.004 59.87 59.799 60.00 60.00 59.988 Pixel clock(MHz) 25.17 40.00 65.00 79.5 84.62 84.62 108.875 138.625 Proposed VESA(VGA) VESA(SVGA) VESA(XGA) VESA(WXGA) VESA(WXGA) WXGA SXGA WUXGA Remarks
* Monitor Range Limits Min Vertical Freq - 58 Hz / Max Vertical Freq - 63 Hz Min Horiz. Freq - 28 kHz / Max Horiz. Freq - 68 kHz Pixel Clock - 150 MHz
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6.2. DTV Mode
No. 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11 12 13 14 15 16 17 18 19 Resolution 720*480 720*480 720*576 720*480 720*480 720*576 1280*720 1280*720 1280*720 1920*1080 1920*1080 1920*1080 1920*1080 1920*1080 1920*1080 1920*1080 1920*1080 1920*1080 1920*1080 H-freq(kHz) 15.73 15.75 15.625 31.47 31.5 31.25 44.96 45 37.5 28.125 33.72 33.75 56.25 67.432 67.5 27 33.75 26.97 33.716 V-freq.(kHz) 59.94 60.00 50.00 59.94 60.00 50.00 59.94 60.00 50.00 50.00 59.94 60.00 50.00 59.94 60.00 24.00 30.00 23.97 29.976 Pixel clock(MHz) 13.500 13.514 13.500 27 27.027 27 74.176 74.25 74.25 74.25 74.176 74.25 148.5 148.350 148.5 74.25 74.25 74.25 74.25 Proposed SDTV, DVD 480I(525I) SDTV, DVD 480I(525I) SDTV, DVD 576I(625I) 50Hz SDTV 480P SDTV 480P SDTV 576P HDTV 720P HDTV 720P HDTV 720P HDTV 1080I HDTV 1080I HDTV 1080I HDTV 1080P HDTV 1080P HDTV 1080P HDTV 1080P HDTV 1080P HDTV 1080P HDTV 1080P Spec. out but display. Remarks
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LGE Internal Use Only
ADJUSTMENT INSTRUCTION
1. Application Range
This specification sheet is applied to all of the LED TV with LB35B chassis.
3.2. EDID Download
HD MODEL
0 00 01 0F 01 55 48 47 00 02 20 03 40 2D 51 80 00 1 FF 17 49 01 00 88 20 3A 03 22 0C 80 10 F0 18 00 2 FF 01 4B 01 C4 35 54 3F 28 1F 00 35 10 16 71 00 0 10 20 30 40 50 60 70 80 90 A0 B0 C0 D0 E0 F0 3 FF 03 21 01 8E 00 56 1C F1 10 10 00 3E 00 1C 00 4 FF 80 08 01 21 BC 0A 44 4F 26 00 BC 96 26 16 00 ** HDMI 1 : 256Bytes 5 6 7 8 9 FF FF 00 1E 6D A0 5A 78 0A F3 00 45 40 01 01 01 01 1D 00 72 00 00 1E 1B 21 77 21 00 00 1C 20 20 20 20 20 0F 00 0A 20 20 84 07 01 16 02 11 07 50 09 7F 80 1E 00 01 1D 88 21 00 00 1E 00 13 8E 21 00 7C 43 00 C4 8E 20 58 2C 25 00 00 00 00 00 00 A 01 30 61 51 50 00 20 20 03 07 00 8C 00 21 C4 00 B 00 A4 40 D0 A0 00 20 20 11 83 80 0A 18 00 8E 00 C 01 54 01 1E 51 00 00 20 12 01 51 D0 8C 00 21 00 D 01 46 01 20 00 FC 00 20 13 00 D0 8A 0A 98 00 00 E 01 96 01 6E 1E 00 00 01 14 00 1C 20 A0 01 00 00 F 01 26 01 28 30 4C FD 05 68 20 E0 14 1D 9E
2. Designation
(1) Because this is not a hot chassis, it is not necessary to use an isolation transformer. However, the use of isolation transformer will help protect test instrument. (2) Adjustment must be done in the correct order. (3) The adjustment must be performed in the circumstance of 25 °C ± 5 °C of temperature and 65 % ± 10 % of relative humidity if there is no specific designation. (4) The input voltage of the receiver must keep 100-220 V, 50/60Hz. (5) The receiver must be operated for over 5 minutes prior to the adjustment when module is in the circumstance of above 15 °C. In case of keeping module is in the circumstance of 0 °C, it should be placed in the circumstance of above 15 °C for 2 hours. In case of keeping module is in the circumstance of below -20 °C, it should be placed in the circumstance of above 15 °C for 3 hours. * Caution When a still image is displayed for 20 minutes or longer (especially where W/B scale is strong. Digital pattern 13ch and/or Cross hatch pattern 09ch), there can some afterimage in the black level area.
8BIT FHD MODEL
** HDMI 1 : 256Bytes 0 1 2 3 0 00 FF FF FF 10 01 17 01 03 20 11 49 4B 21 30 01 01 D1 C0 40 45 00 08 44 50 48 88 35 00 60 47 20 54 56 70 00 3A 3F 1C 80 02 03 28 F1 90 05 20 22 1F A0 03 0C 00 10 B0 40 80 35 00 C0 2D 10 10 3E D0 51 F0 16 00 E0 80 18 71 1C F0 00 00 00 00 4 FF 80 08 01 21 BC 0A 44 4F 26 00 BC 96 26 16 00 5 FF A0 00 01 00 88 20 0F 90 11 80 88 00 7C 20 00 6 FF 5A 01 02 00 21 20 00 07 07 1E 21 13 43 58 00 7 00 78 01 3A 1E 00 20 0A 01 50 00 00 8E 00 2C 00 8 1E 0A 45 80 1B 00 20 20 16 09 01 00 21 C4 25 00 9 6D D9 40 18 21 1C 20 20 02 7F 1D 1E 00 8E 00 00 A 01 B0 61 71 50 00 20 20 03 07 00 8C 00 21 C4 00 B 00 A3 40 38 A0 00 20 20 11 83 80 0A 18 00 8E 00 C 01 57 01 2D 51 00 00 20 12 01 51 D0 8C 00 21 00 D 01 49 01 40 00 FC 00 20 13 00 D0 8A 0A 98 00 00 E 01 9C 81 58 1E 00 00 01 04 00 1C 20 A0 01 00 00 F 01 25 80 2C 30 4C FD 14 68 20 E0 14 1D 9E
3. MAIN PCBA Adjustments
3.1. ADC Calibration
3.1.1. Using D/L Jig
- An ADC calibration is automatically adjusted from DFT-Jig - If it needs to adjust manually, refer to appendix. * ADC Calibration Protocol (RS232)
NO Enter Adjust MODE ADC adjust Item Adjust `Mode In' ADC Adjust CMD 1 CMD 2 Data 0 A A A D 0 1 0 0 When transfer the `Mode In', Carry the command. Automatically adjustment (The use of a internal pattern)
a. White Balance Adjustment EDID C/S data Block 0 Check sum (Hex) Block 1 HD HDMI A5 44(HDMI1) 34(HDMI2) FHD (8Bit) HDMI C1 44 (HDMI1) 34 (HDMI2)
Adjust Sequence aa 00 00 [Enter Adjust Mode] xb 00 40 [Component1 Input (480i)] ad 00 10 [Adjust 480i Comp1] aa 00 90 End Adjust mode
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LGE Internal Use Only
4. White Balance Adjustment
4.1. Overview
4.1.1. W/B adj. Objective & How-it-works
(1) Objective: To reduce each Panel's W/B deviation (2) How-it-works: When R/G/B gain in the OSD is at 192, it means the panel is at its Full Dynamic Range. In order to prevent saturation of Full Dynamic range and data, one of R/G/B is fixed at 192, and the other two is lowered to find the desired value. (3) Adj. condition: normal temperature 1) Surrounding Temperature: 25 °C ± 5 °C 2) Warm-up time: About 5 Min 3) Surrounding Humidity: 20% ~ 80% 4) Before White balance adjustment, Keep power on status, don't power off (1) Lighting condition in surrounding area surrounding lighting should be lower 10 lux. Try to isolate adj. area into dark surrounding. (2) Probe location: Color Analyzer(CA-210) probe should be within 10 cm and perpendicular of the module surface (80°~ 100°) (3) Aging time 1) After Aging Start, Keep the Power ON status during 5 Minutes. 2) In case of LCD, Back-light on should be checked using no signal or Full-white pattern.
(2) Adjustment Map
Adj. item R Gain G Gain B Gain R Cut G Cut B Cut R Gain G Gain B Gain R Cut G Cut B Cut R Gain G Gain B Gain R Cut G Cut Command (lower caseASCII) CMD1 CMD2 j g j h j i Data Range (Hex.) MIN MAX 00 C0 00 C0 00 C0 Default (Decimal)
Cool
Medium
j j j
a b c
00 00 00
C0 C0 C0
4.1.2. Adj. condition and cautionary items
Warm
j j j
d e f
00 00 00
C0 C0 C0
4.5. Adjustment method
4.5.1. Auto WB calibration
(1) Set TV in ADJ mode using P-Only key(or POWER ON key). (2) Place optical probe on the center of the display. - It need to check probe condition of zero calibration before adjustment. (3) Connect RS-232C Cable (4) Select mode in ADJ Program and begin a adjustment. (5) When WB adjustment is completed with OK message, check adjustment status of pre-set mode. (Cool, Medium, Warm) (6) Remove probe and RS-232C cable. W/B Adj. must begin as start command "wb 00 00" , and finish as end command "wb 00 ff", and Adj. offset if need. - G-gain should be fixed. (1) Cool Mode 1) Purpose : Adjust the color temperature to reduce the deviation of the module color temperature. 2) Principle : To adjust the white balance without the saturation, Fix the G gain to 172 (default data) and change the others (R/B Gain ). 3) Adjustment mode : mode - Cool (2) Medium / Warm Mode 1) Purpose : Adjust the color temperature to reduce the deviation of the module color temperature. 2) Principle : To adjust the white balance without the saturation, Fix the one of R/G/B gain to 192 (default data) and decrease the others. 3) Adjustment mode : Two modes - Medium / Warm
4.2. Equipment
(1) Color Analyzer: CA-210 (NCG: CH 9 / WCG: CH12 / LED: CH14) (2) Adj. Computer (During auto adj., RS-232C protocol is needed) (3) Adjust Remocon (4) Video Signal Generator MSPG-925F 720p/204-Gray (Model: 217, Pattern: 49) * Color Analyzer Matrix should be calibrated using CS-1000.
4.5.2. LED White balance table
4.3. Equipment connection
Co lo r Analyzer
Probe
RS -232C
Co m p ut er
RS -232C RS -232C
Pat t ern Generat o r
Signal Source * If TV internal pattern is used, not needed
4.4. Adjustment Command (Protocol)
(1) RS-232C Command used during auto-adj.
RS-232C COMMAND CMD wb wb DATA 00 00 ID 00 ff Explantion Begin White Balance adjustment End White Balance adjustment (internal pattern disappears )
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LGE Internal Use Only
4.6. Reference(White Balance Adjustment coordinate and color temperature)
7. GND and HI-POT Test
(1) Luminance: 204 Gray, 80IRE (2) Standard color coordinate and temperature using CS-1000 (over 26 inch)
Color Temp 13,000 K 9,300 K 6,500 K Color coordinate x = 0.269 (±0.002) y = 0.273 (±0.002) x = 0.285 (±0.002) y = 0.293 (±0.002) x = 0.313 (±0.002) y = 0.329 (±0.002) Remark * Test signal - Inner pattern for W/B adjust - External white pattern (80IRE, 204gray)
7.1. GND & HI-POT auto-check preparation 7.2. GND & HI-POT auto-check
(1) Check the POWER CABLE and SIGNAL CABE insertion condition
Mode Cool (C50) Medium (0) Warm (W50)
(Direct LED)
Direct LED & 32" POLA W/B adjust target value Cool Medium Warm Target x y x y x 271 276 287 296 315
y
332
(1) Pallet moves in the station. (POWER CORD / AV CORD is tightly inserted) (2) Connect the AV JACK Tester. (3) Controller (GWS103-4) on. (4) GND Test (Auto) - If Test is failed, Buzzer operates. - If Test is passed, execute next process (Hi-pot test). (Remove A/V CORD from A/V JACK BOX) (5) HI-POT test (Auto) - If Test is failed, Buzzer operates. - If Test is passed, GOOD Lamp on and move to next process automatically.
(Direct LED)
42" POLA LED W/B adjust target value (42LS3450 series) Cool Medium Warm Target x y x y x y 274 280 290 300 318 336
7.3. Checkpoint
5. Tool Option setting & Inspection per countries
(1) Press 'IN START' key at Factory Service remote control. (2) Select 'Tool Option 1'. (3) Punch in the number and press 'OK'. (Each of models has their number) (4) Correct 'Tool Option2' ~ 'Tool Option5'. (5) Completed adjusting Tool option.
(1) Test voltage - GND: 1.5 KV / min at 100 mA - SIGNAL: 3 KV / min at 100 mA (2) TEST time: 1 second (3) TEST POINT - GND Test = POWER CORD GND and SIGNAL CABLE GND. - Hi-pot Test = POWER CORD GND and LIVE & NEUTRAL. (4) LEAKAGE CURRENT: At 0.5 mArms
6. AUDIO output check
6.1. Audio input condition
(1) RF input: Mono, 1KHz sine wave signal, 100% Modulation (2) CVBS, Component: 1KHz sine wave signal (0.4Vrms) (3) RGB PC: 1KHz sine wave signal (0.7Vrms)
6.2. Specification
Item Audio practical max Output, L/R (Distortion=10% max Output) Min 4.5 Typ 5.0 Max 6.0 Unit W Vrms Remark (1) Measurement condition - EQ/AVL/Clear Voice: Off (2) Speaker (8 Impedance)
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LGE Internal Use Only
8. USB S/W Download
(optional, Service only) (1) Put the USB Stick to the USB socket. (2) Automatically detecting update file in USB Stick. - If your downloaded program version in USB Stick is lower than that of TV set, it didn't work. Otherwise USB data is automatically detected. (3) Show the message "Copying files from memory".
9. Optional adjustments
9.1. Manual ADC Calibration
Enter `EZ ADJUST' mode by pressing `ADJ' key. Enter Internal ADC calibration mode by pressing `' or `OK' key at `7. ADC Calibration'
EZ ADJUST
0. Tool Option1 1. Tool Option2 2. Tool Option3 3. Tool Option4 4. Tool Option5 5. Tool Option Commercial 6. Country Group 7. Area Option 8. ADC Calibration 9. White Balance 10. 10 Point WB 11. Test Pattern 12. EDID D/L 13. Sub B/C 14. Ext. Input Adjust
ADC Calibration
ADC Comp 480i ADC Comp 1080p ADC RGB Start Reset NG NG NG
Caution : Using `P-ONLY' key of the Factory Service remote control when turns TV on.
9.2. Manual White balance Adjustment
(4) Updating is starting.
9.2.1. Adjustment condition and cautionary items
(5) Updating Completed, The TV will restart automatically. (6) If your TV is turned on, check your updated version and Tool option. (explain the Tool option, next stage) * If downloading version is more high than your TV have, TV can lost all channel data. In this case, you have to channel recover. if all channel data is cleared, you didn't have a DTV/ATV test on production line. * After downloading, have to adjust TOOL OPTION again. 1) Push "IN-START" key in service remote control. 2) Select "Tool Option 1" and push "OK" key. 3) Punch in the number. (Each model has their number.)
(1) Lighting condition in surrounding area surrounding lighting should be lower 10 lux. Try to isolate adj. area into dark surrounding. (2) Probe location: Color Analyzer (CA-210) probe should be within 10cm and perpendicular of the module surface (80°~ 100°) (3) Aging time 1) After Aging Start, Keep the Power ON status during 5 Minutes. 2) In case of LCD, Back-light on should be checked using no signal or Full-white pattern. (1) Color Analyzer: CA-210 (NCG: CH 9 / WCG: CH12 / LED: CH14) (2) Adj. Computer(During auto adj., RS-232C protocol is needed) (3) Adjust Remot control (4) Video Signal Generator MSPG-925F 720p/216-Gray (Model: 217, Pattern: 78) (1) Set TV in Adj. mode using POWER ON. (2) Zero Calibrate the probe of Color Analyzer, then place it on the center of LCD module within 10cm of the surface. (3) Press ADJ key EZ adjust using adj. R/C 6. WhiteBalance then press the cursor to the right (Key). When Key() is pressed 216 Gray internal pattern will be displayed. (4) One of R Gain / G Gain / B Gain should be fixed at 192, and the rest will be lowered to meet the desired value. (5) Adj. is performed in COOL, MEDIUM, WARM 3 modes of color temperature. If internal pattern is not available, use RF input. In EZ Adj. menu 6.White Balance, you can select one of 2 Test-pattern: ON, OFF. Default is inner(ON). By selecting OFF, you can adjust using RF signal in 216 Gray pattern.
9.2.2. Equipment
9.2.3. Adjustment
Copyright © LG Electronics. Inc. All rights reserved. Only for training and service purposes
- 12 -
LGE Internal Use Only
POWER BOARD
P701 2 4 1 P601/602 P400
Module
IR Board
IR P Dim Inv. ON RL On Led_PWR
ST_3.5V
108
9 10
3 5
13~15
P_24V
LVDS Output
XXX 117 111 110 102 105 101
P_ST 3.5V
KEY1 KEY2
IC502 Serial Flash 8Mbytes
94 95 97 96
Panel_Vcc Q720 AO3407A
P_12V
SPI_CLK SPI_DI SPI_CZ SPI_DO
IR/KEY
98 99 44 43
USB_5V
JK202
77 62 54 41 30 18 100 9 116 107
IC501
BLOCK DIAGRAM
Audio L-Out
Audio R-Out
((
8 9 38
AV1 In
Y,Pb,Pr In
LPF
Sound AMP NTP7513 33
Comp. R/L In
I2S_MCLK I2S_WS I2S_SCK I2S_SDO HDMI SCL/SDA Audio_SDA Audio_SCL
AV2 In
- 13 IC711 Main_1.8V 1.8V REG
48 115 50 51 113 112 XXX 22,20,24,33,34 7
24Mhz
40 45 53 52
IF_P
10
Main_1.2V IC701 MP20051
9
4 3
IF_AGC Tuner SDA Tuner SCL
Main_3.3V
Q710
26,33,34 27,35,36
37
38
TUNER
B+
5 7 OP-AMP A_OUT_12V IC302 TU_1.8V x4 Gain Audio TU_3.3V Out IC401 To USB
40 35
S_AMP_24V
32 19 31 20
LPF
30 21 18
IC301
10 11
JK203 JK204
((
LGE Internal Use Only
P301
JK101
M_3.3V
IF_N
11
Copyright © LG Electronics. Inc. All rights reserved. Only for training and service purposes
85 84
EEP SDA EEP SCL
IC503 EEPROM 24C64 To USB
USB_DN USB_DP
IC709 MP1497
Main_5V
MST6841XP
39
EXPLODED VIEW
IMPORTANT SAFETY NOTICE
Many electrical and mechanical parts in this chassis have special safety-related characteristics. These parts are identified by in the Schematic Diagram and EXPLODED VIEW. It is essential that these special safety parts should be replaced with the same components as recommended in this manual to prevent X-RADIATION, Shock, Fire, or other Hazards. Do not modify the original design without permission of manufacturer.
910
32LN515*
400
521
510
LV1
530
123
200
122
301
300
Copyright © LG Electronics. Inc. All rights reserved. Only for training and service purposes
- 14 -
A2
Stand Base + Stand Body
A9
Set + Stand
500
A10
32LN510*/511*/512*/513*
540
120
900
LGE Internal Use Only
EAX65027101
LB35B/LC35B/LL35B
COMPONENT / AV IN / AV AUDIO OUT
JK101 PPJ239-06 7H 6H 4H 5G 4F 6F 8F 5E 8E
AV2LIN
AV2RIN
R117 ZD110 20V R116 220K 10K R118 12K C108 470pF 50V
AV2_RIN
R114 ZD109 20V R113 220K 10K R115 12K C107 470pF 50V
AV2_LIN
AV2_VIN D101 READY D102 READY
AV2_VIN
ZD108 SD05 R112 75
MNTROUT
R111 C105 5600pF 50V 1K C E B READY Q104
MMBT3904(NXP)
C106 Q103 C E B
MMBT3904(NXP)
ZD107 20V
10uF 16V
POP
MNT_ROUT MUTE_AOUT NOISE
5D 7D 7N 6N 4N 5M 5L 8L
MNTLOUT
R110 C103 5600pF 50V 1K C E B READY Q102
MMBT3904(NXP)
C104 10uF 16V
POP NOISE
MNT_LOUT MUTE_AOUT
ZD106 20V
C E
B
Q101
MMBT3904(NXP)
COMMONRIN
R108 ZD105 20V R107 220K 10K R109 12K C102 470pF 50V
COMMON_RIN
COMMONLIN
R105 ZD104 20V R104 220K 10K R106 12K C101 470pF 50V
COMMON_LIN
COMP_PR
COMP_PR
D103 READY D104 READY
ZD102 SD05
R103 75
5K 8K
COMP_PB
D105 READY D106 READY
COMP_PB
ZD101 SD05 R102 75
4J 6J 7J
V-OUT Buffer(DEBUG)
COMMON_VIN D107 READY D108 READY
COMMON_VIN
ZD100 SD05 R101 75
P_12V
DEBUG
AV2_VIN
OPT
TP101
C E
DEBUG
B
MMBT3904(NXP) Q105 R121 33
DEBUG
MNT_VOUT
R122 0
R120 75
DEBUG
R123 220
THE SYMBOL MARK OF THIS SCHEMETIC DIAGRAM INCORPORATES SPECIAL FEATURES IMPORTANT FOR PROTECTION FROM X-RADIATION. FILRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS ESSENTIAL THAT ONLY MANUFATURES SPECFIED PARTS BE USED FOR THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC.
INPUT1
32LN5100 INPUT1
2012/11/15 1 7
Copyright © 2013 LG Electronics. Inc. All rights reserved. Only for training and service purposes
LGE Internal Use Only
EAX65027101
LB35B/LC35B/LL35B
I2C Control
KJA-PH-1-0177 JK201 +3.5V_ST R206 1 3 4 5 M1 M3_DETECT M4 M5_GND 0 W/O UART IC C201 0.1uF W/O UART IC W/O UART IC With UART IC R201 100 R204 0 R202 100 With UART IC ROUT1 DEBUG P201 12505WS-04A00 DIN2 1 ROUT2 2 EAN41348201 3 9 8 RIN2 12 5 C2DOUT1 GND 15 2 V+ VCC 16 1 C1+ C202 0.1uF With UART IC C203 0.1uF With UART IC With UART IC IC201 6 M6 MAX3232CDR
HDMI(REAR)
R231 1K
HDMI1_HPD
R230 10K
C B
MMBT3904(NXP)
E
Q230
+5V_USB
A1
HDMI1_DET
SHIELD READY ZD230 C
20
C1-
19 HPD 18 +5V_POWER
R205 0
14
3
R234 4.7K
READY ZD231
R235 10K
RIN1
13
4
C2+ C204 0.1uF
With UART IC
17 DDC/CEC_GND 16 SDA 15 SCL 14 NC 13 CEC 12 CLK11 CLK_SHIELD 10 9 8 7 CLK+ DATA0DATA0_SHIELD DATA0+ DATA1-
R232 R233 2.7K 2.7K
READY ZD232 R236 100 R237 100
A2
D230
BAT54C
HDMI1_SDA HDMI1_SCL
DIN1
11
6
VC205 0.1uF
With UART IC
READY ZD233
10
7
DOUT2
HDMI1_CKHDMI1_CK+ HDMI1_D0HDMI1_D0+ HDMI1_D1HDMI1_D1+ HDMI1_D2HDMI1_D2+
4 P202 5 +3.5V_ST 12507WS-04L
6 5 4 DATA1_SHIELD DATA1+
VCC
1
PM_RXD
2
3 DATA2DATA2_SHIELD 2 DATA2+ 1
GND
3
RM_TXD
4 5
JK203
DSUB_SCL
DSUB_SDA
GND
R242 1K
HDMI2_HPD
R241 10K
C B
MMBT3904(NXP)
E
Q240
+5V_USB
A1
A2 C
D240
BAT54C
READY ZD240 SHIELD
HDMI2_DET
20
USB(SIDE)
Close to SIDE_USB
19 HPD +5V_USB 18 +5V_POWER 17 DDC/CEC_GND L220 C220 10uF 10V
OPT READY ZD241
R245 4.7K
R246 10K
R243 R244 2.7K 2.7K
READY ZD242 R247 100 R248 100 READY ZD243
16 SDA 15 SCL 14 NC 13 CEC 12 CLK11 CLK_SHIELD
C221 22uF 10V
120
HDMI2_SDA HDMI2_SCL
3AU04S-305-ZC-(LG) JK202
1
HDMI2_CKHDMI2_CK+ HDMI2_D0HDMI2_D0+ HDMI2_D1HDMI2_D1+ HDMI2_D2HDMI2_D2+
4
5
THE SYMBOL MARK OF THIS SCHEMETIC DIAGRAM INCORPORATES SPECIAL FEATURES IMPORTANT FOR PROTECTION FROM X-RADIATION. FILRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS ESSENTIAL THAT ONLY MANUFATURES SPECFIED PARTS BE USED FOR THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC.
INPUT2
Copyright © 2013 LG Electronics. Inc. All rights reserved. Only for training and service purposes
USB DOWN STREAM
2
USB_DN 10 9 8 7 6 5 4
CLK+ DATA0DATA0_SHIELD DATA0+ DATA1DATA1_SHIELD DATA1+
3
USB_DP READY ZD220 30V READY ZD221 30V
3 DATA2DATA2_SHIELD 2 DATA2+ 1
JK204
32LN5100 INPUT2
2012/11/15
2
7
LGE Internal Use Only
EAX65027101
LB35B/LC35B/LL35B
SW_RESET C320 1000pF 50V
50V 22000pF
+24V_AMP
I2S_MCLK R304 +3.3V_M L301 C321 10uF 6.3V
100
C319
BLM18PG121SN1D
[EP]GND
C322 0.1uF 16V
C318 0.1uF 50V
C317 10uF 35V SPK_L+ R313 12 C325 390pF 50V C326 390pF 50V R314 12 L303 10uH C329 0.47uF 50V L304 10uH R316 12 C331 0.1uF 50V R323 4.7K SPK_L-
VDD_IO
GND_IO
PGND1A
PVDD1A
PVDD1B
CLK_I
RESET
BST1A
OUT1A
AD
C330 0.1uF 50V
R322 4.7K
SPEAKER_L
40
39
38
37
36
35
34
33
32
31
AGND_PLL VDD_PLL
C301 0.1uF 16V OPT C302 0.1uF 16V
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 IC301 NTP7513 THERMAL 41
30 29 28 27 26 25 24 23 22 21
OUT1B PGND1B BST1B VDR1 VCC5 AGND VDR2 BST2A PGND2A OUT2A
C311 22000pF 50V C312 1uF 10V C313 1uF 10V C315 22000pF 50V
R315 12
DGND_PLL GND DGND DVDD SDATA WCK BCK SDA
C303 1uF 10V
JP304
SPK_L+
C314 1uF 10V
SPK_L+ JP303 SPK_LJP302 SPK_R+ JP301 SPK_R1 . 2 3 4
I2S_SDO I2S_WS I2S_SCK AUAMP_SDA R306 100
R301 R302 R303
100 100 100
0x54
SPK_LSPK_R+ SPK_R-
SMAW250-H04R
AUAMP_SCL
R307
100
P301
MONITOR_0
MONITOR_1
MONITOR_2
SCL
PGND2B
PVDD2B
PVDD2A
FAULT
BST2B
OUT2B
R308 4.7K
R309 4.7K
C305 33pF 50V
C306 33pF 50V
SPK_R+ +24V_AMP
+3.3V_M
R317 12 C327 390pF 50V
R318 12 L305 10uH C333 0.47uF 50V L306 10uH R320 12
C334 0.1uF 50V
R324 4.7K
C309 0.1uF 50V C308 22000pF 50V
C310 10uF 35V
SPEAKER_R
C335 0.1uF 50V R325 4.7K
C328 390pF 50V R319 12
SPK_R-
R311 POWER_DET 100
AUDIO_OUT AMP : GAIN X 4
P_12V
IC302 AS324MTR-E1
C350 0.1uF 16V C E B
Q350 MMBT3904(NXP) R351
1K
1 OUT1
R352 10K
OUT4 14
MNT_LOUT
R350 4.7K
C351 6800pF 50V
C352
33pF 50V R353 6.8K
2 INPUT1-
INPUT4- 13
MNT_L_AMP
R354
5.6K
3 INPUT1+
P_12V
INPUT4+ 12
4 VCC
C353 0.1uF 16V
GND 11
MNT_R_AMP
P_12V
R355
5.6K
5 INPUT2+
INPUT3+ 10
C354
33pF 50V
R356
10K R357 6.8K
6 INPUT2-
INPUT3- 9
C355 0.1uF 16V C E B
Q351 MMBT3904(NXP) R358
1K
7 OUT2
OUT3 8
MNT_ROUT
R359 4.7K C356 6800pF 50V
THE SYMBOL MARK OF THIS SCHEMETIC DIAGRAM INCORPORATES SPECIAL FEATURES IMPORTANT FOR PROTECTION FROM X-RADIATION. FILRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS ESSENTIAL THAT ONLY MANUFATURES SPECFIED PARTS BE USED FOR THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC.
AUDIO
32LN5100 AUDIO
2012/11/15 3 7
Copyright © 2013 LG Electronics. Inc. All rights reserved. Only for training and service purposes
LGE Internal Use Only
EAX65027101
LB35B/LC35B/LL35B
+3.5V_ST
IR
R421 10K
R422 10K
KEY1
ZD401 SD05
OPT C421 0.1uF P421 12507WR-08L
KEY2
ZD402 SD05
OPT C422 0.1uF
1
2 +3.5V_ST L421
3
BLM18PG121SN1D
4
IF
IR
R423 4.7K OPT
C423 0.1uF 16V
C424 1000pF 50V
LED OPT C425 0.1uF 16V
5
6
7 C426 100pF 50V
8 9
PAL TU401 TDSH-G501D(B)
NTSC TU402 TDSS-H501F(B)
R403 100
+3.3V_TU
R404 100K
TUNER_RESET
C401 0.1uF 16V +3.3V_TU
1 2 3 4 5 6 7 8 9 10 11 B1 B1 B2 B2 A2 A2 A1
NC RESET SCL SDA +B1[3.3V] SIF +B2[1.8V] CVBS IF_AGC DIF[P] DIF[N] A1 X
1 2 3 4 5 6 7 8 9 10 11 B1 12 SHIELD A1
NC_1 RESET
R407 2.2K R405
R408 2.2K
SCL SDA
C402 47pF 50V
33
TUNER_SCL
R406 C403 47pF 50V 33
TUNER_SDA
R409 1 1/10W
+3.3V_TU
Size change,0929
+3.3V_M
+B1[3.3V] NC_2 +B2[1.8]
Near the pin
C406 100pF 50V C405 0.1uF 16V C404 22uF 6.3V
L401 BLM18PG121SN1D
R410 1 1/10W C411 0.1uF 16V
C412 10uF 6.3V
IC401 AP1117E18G-13
NC_3 IF_AGC DIF[P] DIF[N]
R411 1
1
ADJ/GND
OUT 2
IN
3
C409 100pF 50V C408 0.1uF 16V
C407 10uF 6.3V
R412 100
IF_AGC
A1
NTSC R413-*1 0
C410 0.1uF 16V
should be guarded by ground
R413 10 PAL R414 10 PAL
IF_P IF_N
Close to the tuner NTSC R414-*1 0
READY C430 0.1uF 250V
READY C431 0.1uF 250V R401 0 NTSC
THE SYMBOL MARK OF THIS SCHEMETIC DIAGRAM INCORPORATES SPECIAL FEATURES IMPORTANT FOR PROTECTION FROM X-RADIATION. FILRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS ESSENTIAL THAT ONLY MANUFATURES SPECFIED PARTS BE USED FOR THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC.
TUNER & IR
32LN5100 TUNER & IR
2012/11/15 4 8
Copyright © 2013 LG Electronics. Inc. All rights reserved. Only for training and service purposes
LGE Internal Use Only
HDMI2_SDA
HDMI2_D0+
HDMI2_D0-
HDMI2_CK+
HDMI2_HPD
HDMI2_D1+
MUTE_AOUT +3.5V_ST
HW_RESET
I2S_MCLK
EAX65027101
LB35B/LC35B/LL35B
HDMI2_D1-
HDMI2_CK-
AUAMP_SDA
AUAMP_SCL
SW_RESET
+3.5V_ST
*H/W OPTION
AVDD_DDR
LED R539 4.7K KEY1 KEY2 R538 4.7K
HW_OPT
PWM_DIM
HD LOW +3.3V_M
FHD
FHD HIGH
IR
MSTAR Vcc
L500 +1.2V_VDDC
120-ohm
DSUB_SDA
DSUB_SCL
R519 4.7K R544 100 R545 100 R542 100 R543 100
R518 100
ST 1.26V
VDDC C501 10uF 6.3V
R535 1K
C549 0.1uF R541 100 R540 1K R537 22 R536 22
R534 1K
R550 4.7K HW_OPT1
HD
GPIO69/I2S_OUT_MCK
HOTPLUG_D
SAR3/GPIO72 SAR2/GPIO73 SAR1/GPIO74 SAR0/GPIO75 AVDD_DDR_2
PWM1/GPIO25 PWM0/GPIO26
DDCDD_DA
R546 100
R551 4.7K
RXCKP_D
RXCKN_D
HWRESET
DDCA_DA
DDCA_CK
TESTPIN
R533 0
DDR 1.8V
L501 +1.8V_M
120-ohm
RX1P_D
RX1N_D
RX0P_D
RX0N_D
GPIO70
GPIO68
GPIO67
AVDD_DDR C502 10uF 6.3V C503 4.7uF
[EP]
IRIN
GND
CEC
INV_ON
128
127
126
125
124
123
122
121
120
119
118
117
116
115
114
113
112
111
110
109
108
107
106
105
104
103
R531 10K
DDCDD_CK
HDMI2_SCL
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38
102 101 100 99 98 97 96 95 94 93 92 91 90 89 88 87 86 85 84 83 82 81 80 79 78 77 76 75 74 73 72 71 70 69 68 67 66 65
GPIO64 GPIO63
RL_ON
120-ohm
L502
ST 3.3V
VDDC_3.3 C504 10uF 6.3V AVDD33_DEMOD
+3.5V_ST VDDC_3.3
C548 0.1uF 120-ohm USB_DP
RX2N_D
HDMI2_D2-
RX2P_D
HDMI2_D2+
THERMAL 129
AVDD_MOD_4
USB0_DP USB0_DM
L503
HOTPLUG_A
HDMI1_HPD
RXCKN_A
HDMI1_CK-
120-ohm USB_DN
L504
AU_3.3V
120-ohm
RXCKP_A
HDMI1_CK+
SPI_CZ
SPI_CZ
RX0N_A
HDMI1_D0-
SPI_DO
SPI_DO
L505
3.3V_DMPLL
RX0P_A
HDMI1_D0+
SPI_DI
SPI_DI
AVDD_MOD_1
VDDC_3.3
C505 0.1uF
SPI_CK
SPI_CLK
RX1N_A
HDMI1_D1-
RX1P_A
HDMI1_D1+
IC501 LGE6841 (ATV_13)
PWM3/GPIO25 PWM2/GPIO24
GPIO0 GPIO1 GPIO2 GPIO3 GPIO4 GPIO5 GPIO6
R530 100 R547 10K R548 10K R528 100 R527 10K
FLASH_WP
EEPROM(64K)
IC503 AT24C64D-SSHM-T
A0 1 8 VCC
DDCDA_DA
HDMI1_SDA
HDMI1_DET HDMI2_DET
+3.5V_ST
RX2N_A
HDMI1_D2-
RX2P_A
HDMI1_D2+
POWER_SW PANEL_ON HW_OPT1
A1
DDCDA_CK
HDMI1_SCL
2
7
WP
C572 0.1uF 16V R578 22
C573 22pF READY C574 22pF READY
R569 R577 4.7K 4.7K
VDDC
C506 0.1uF
ARC VDD AVDD3P3_ADC HSYNC1
R501 33 C508 0.047uF
A2
3
6
SCL
EEP_SCL EEP_SDA
GND
4
5
SDA
VDDC_3.3
C507 0.1uF
R579 22
EEP_SDA
GPIO7
BIN1P SOGIN1 GIN1P
C511 0.047uF
INT/GPIO65
VDDC_2 LVB0M LVB0P LVB1M LVB1P
EEP_SCL R549 POWER_DET 100
COMP_PB
C509 1000pF
COMMON_VIN
R523 33 R502 33
COMP_PR
VDDC
C547 0.1uF
RXB0RXB0+ RXB1RXB1+
C510 0.047uF
RXB0RXB0+ RXB1RXB1+
R503 68
GIN1M RIN1P VSYNC1 CVBS1 CVBS0
SERIAL FLASH(2MB)
+3.5V_ST
R504 33
C550 0.047uF
AVDD_MOD_3
LVB2M LVB2P LVBCKM LVBCKP LVB3M LVB3P LVB4M LVB4P LVA0M LVA0P LVA1M LVA1P
AV2_VIN
R505 33 R506 33 C513 0.047uF
C512 0.047uF R507 68 C514 0.047uF
VDDC_3.3
C546 0.1uF R570 10K
RXB2RXB2+
RXB2RXB2+ RXBCKRXBCK+ RXB3FLASH_WP
VCOM
IC502 W25Q64FVSSIG
R571 100 R572 100 R573 100
GND 4 5 DI[IO0] WP[IO2] 3 6 CLK CS VCC
MNT_VOUT
AU_3.3V
L506 120-ohm C516 10uF
C515 0.1uF C517 0.1uF
CVBSOUT1 AVDD_AU33
AUREF VAG
SPI_CZ SPI_DO
1
8
RXBCKRXBCK+ RXB3RXB3+
DO[IO1]
2
7
%HOLD[IO3]
C570 0.1uF 16V R574 100 R575 100 C571 0.1uF 16V READY
SPI_CLK SPI_DI
COMMON_LIN COMMON_RIN AV2_LIN AV2_RIN
C518 C519
2.2uF 2.2uF C520 C521 2.2uF 2.2uF
C522 220pF MNT_L_AMP MNT_R_AMP
R510 220K
LINEIN_L1 LINEIN_R1 LINEIN_L3 LINEIN_R3 LINEOUTL3 LINEOUTR3
RXB3+
RXA0RXA0+ RXA1RXA1+
RXA0RXA0+ RXA1RXA1+
39
40
41
42
43
44
45
46
47
48
49
50 51
52
53
54
55
56
57
58
59
60
61
62
63
64
R508 100 R509 100
H/W RESET
+3.5V_ST
GPIO58/I2S_OUT_SD
AVDD_MOD_2
VIFP
VIFM
VSS
VDDP
LVACLKP
LVACLKM
GPIO56
GPIO60
GPIO61
VDDC_1
XTALO
XTALI
IFAGC
LVA4P
LVA4M
LVA3P
LVA3M
LVA2P
AVDD3P3_DMPLL
AVDD3P3_DADC
GPIO57/I2S_OUT_BCK
GPIO55/I2S_OUT_WS
LVA2M
AVDD_DDR
C523 220pF
R511 220K
IC504 APX803D29 VCC RESET
R561 10K
C532 0.1uF R512 1M
C533 0.1uF C542 0.1uF R513 100 R514 100 C535 0.1uF
3 1
2
POWER_DET
RXACK+
RXA3+
RXA3-
RXA2+
RXA2-
3.3V_DMPLL
AVDD33_DEMOD
R520 100
RXACK-
R521 100
GND
C560 0.1uF R562 470
X501 24MHz C530 15pF C531 15pF
I2S_SCK
I2S_SDO
RXACK-
RXA3+
TUNER_RESET
RXA3-
TUNER_SCL
TUNER_SDA
C534 0.1uF
OPT
C551 220pF 50V C536 33pF C537 33pF
+3.3V_M
R524 0
I2S_WS
RXACK+
RXA2+
RXA2-
R517 10K
AVDD_DDR
C561 4.7uF 10V R564 10
50V
C541 22000pF 50V C543 0.1uF C544 0.1uF C545 0.1uF C562 4.7uF 10V R563 62K
HW_RESET
C563 0.1uF 16V
L521 100NH OPT
Close to MSTAR Close to MSTAR IF_AGC
VDDC VDDC_3.3 VDDC_3.3
IF_P
THE SYMBOL MARK OF THIS SCHEMETIC DIAGRAM INCORPORATES SPECIAL FEATURES IMPORTANT FOR PROTECTION FROM X-RADIATION. FILRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS ESSENTIAL THAT ONLY MANUFATURES SPECFIED PARTS BE USED FOR THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC.
MAIN SOC
IF_N
32LN5100 MAIN SOC
2012/11/15 5 7
Copyright © 2013 LG Electronics. Inc. All rights reserved. Only for training and service purposes
LGE Internal Use Only
EAX65027101
LB35B/LC35B/LL35B
FHD P602
FI-RE51S-HF-J-R1500
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 1 19 20 21 4 22 23 24 7 25 8 26 9 27 10 28 29 30 31 32 33 34 17 35 36 37 20 38 39 40 23 41 24 42 25 43 26 44 27 45 28 46 29 47 48 49 50 51 52 FHD C606 0.1uF 16V OPT C605 1000pF 50V OPT C604 10uF 16V FHD L602 120
RXA3+ RXA3RXACK+ RXACKRXA2+ RXA2[30] [29] [28] [27] [26] [25] [24] [23] [22] [21] [20] [19] [18] [17] [16] [15] [14] [13] [12] [11] [10] [09] [08] [07] [06] [05] [04] [03] [02] [01] HD C603 0.1uF 16V . OPT C602 1000pF 50V OPT C601 10uF 16V HD L601 120
HD P601
FF10001-30
RXA1+
2
RXA13
RXA0+
5
RXA06
RXA0RXA0+ RXA1RXA1+ RXA2RXA2+ RXACKRXACK+ RXA3RXA3+
RXB3+ RXB3RXBCK+ RXBCKRXB2+ RXB2RXB1+ RXB1RXB0+
11 12 13 14 15 16
18 19
21
RXB022
PANEL_VCC
PANEL_VCC
31
30
THE SYMBOL MARK OF THIS SCHEMETIC DIAGRAM INCORPORATES SPECIAL FEATURES IMPORTANT FOR PROTECTION FROM X-RADIATION. FILRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS ESSENTIAL THAT ONLY MANUFATURES SPECFIED PARTS BE USED FOR THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC.
LVDS
32LN5100 LVDS
2012/11/15 6 7
Copyright © 2013 LG Electronics. Inc. All rights reserved. Only for training and service purposes
LGE Internal Use Only
EAX65027101
LB35B/LC35B/LL35B
** 3.5V_ST -> 1.26V VDDC
+3.5V_ST
V0 = 0.8*(1+(R2/R1))
[EP]GND
FROM LIPS & POWER B/D
+3.5V_ST
MMBT3906(NXP) Q722
IC701 MP20051
OUT_1
+1.2V_VDDC OUT:1.26V
IN_2
8 THERMAL
1
9
IN_1
7
2
OUT_2
R742
1 R1 1%
P701 SMAW200-H18S1
+3.3V_M
R714 1K
C740 10uF 6.3V R744 10K C741 0.1uF 16V
E
C
NC
6
3
FB
EN
5
4
GND
R2 1%
R740 2.7K
C742 10uF 6.3V
B
RL_ON +3.5V_ST
R741 4.7K
+3.5V_ST
L701 ZD702 SD05 C702 0.1uF 16V 120
PWR_ON 3.5V 3.5V GND
L702 C707 0.1uF 50V 120
1 3 5 7 9 11 13 15 17
2 4 6 8 10 12 14 16 18
DRV_ON P-DIM P-DIM2 GND 24V GND 12V NC GND
R729 1K
R710 100 C PWM_DIM E B Q703 MMBT3904(NXP)
R715 10K R716 10K INV_ON
+24V_AMP
** 3.3V_M -> 1.8V_M
+3.3V_M
C743 10uF 6.3V C744 0.1uF 16V
IC711 AP1117E18G-13 IN 3 ADJ/GND 1
24V GND 12V 12V GND
P_12V
L703 C705 0.1uF 16V 120
+1.8V_M
2 OUT
ZD701 20V READY
C745 10uF 6.3V
19 .
** +3.5V_ST -> 3.3V_M
+3.5V_ST
Q710 AO3435
S D
L750 BLM18PG121SN1D
+3.3V_M
C752 0.1uF 16V C754 10uF 6.3V
C750 0.1uF 16V
READY
R748 33K R750 10K R749 2.2K R747 10K
C B
C753 4.7uF 10V
G
**12V->USB 5V
POWER_SW
Q711 MMBT3904(NXP)
E
V0 = 0.8*(1+(R1/R2))
NR8040T4R7N L771
OUT:5V R1
R770 43K
1%
P_12V C774 0.1uF
SS 1
IC709 MP1497DJ
FB
C771 1uF 25V R771 33
6.8uH
Closed IC709
C776 22uF 10V
OPT
+5V_USB
C777 10uF 10V
8
L770 120
Closed IC709
IN
2
7
VCC
R778 47K C775 0.1uF 16V
R2
R772 8.2K
1%
C770 10uF 16V
C772 0.1uF 16V
SW
3
3A
6
EN
** Switch Panel-Vcc
P_12V
+3.3V_M L761 120
GND
4
5
BST
R777 100K C773 0.1uF 16V
Q720 AO3407A
S D
C761 0.1uF 16V R765 3.3K OPT R766 4.7K
PANEL_VCC
R761 33K
C760 4.7uF 16V
** Jig Point_GND
PANEL_ON
JP710 JP708 JP709 JP711
R762 5.6K C B Q721 E MMBT3904(NXP)
THE SYMBOL MARK OF THIS SCHEMETIC DIAGRAM INCORPORATES SPECIAL FEATURES IMPORTANT FOR PROTECTION FROM X-RADIATION. FILRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS ESSENTIAL THAT ONLY MANUFATURES SPECFIED PARTS BE USED FOR THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC.
POWER
G
32LN5100 POWER
2012/11/15 7 7
Copyright © 2013 LG Electronics. Inc. All rights reserved. Only for training and service purposes
LGE Internal Use Only
Standard Repair Process
LCD TV
Error symptom
A. Video error
No video/ Normal audio
Established date
2013. 01 .24
Revised date
1/14
First of all, Check whether all of cables between board is inserted properly or not.
(Main B/D Power B/D, LVDS Cable,Speaker Cable,IR B/D Cable,,,)
A1
No video Normal audio Normal audio N Move to No video/No audio Y Check Back Light On with naked eye On N Y
A4
Check Power Board 24v, 12v,3.5v etc. Normal voltage N Repair Power Board or parts
Y
Replace T-con Board or module
A2
Check Power Board 93.2~118.5V v output
Normal voltage N Repair Power Board or parts
Y
Replace Inverter or module
End
Precaution
A6 & A3
Replace Main Board Re-enter White Balance value
Always check & record S/W Version and White Balance value before replacing the Main Board
Copyright © 2013 LG Electronics. Inc. All rights reserved. Only for training and service purposes
1 / 36
LGE Internal Use Only
Standard Repair Process
LCD TV
Error symptom
A. Video error
No video/ No audio
Established date
2013. 01 .24
Revised date
2/14
A4
No Video/ No audio Check various voltages of Power Board ( 3.5V,12V,20V or 24V...)
Normal voltage? N
Replace Power Board and repair parts
Y
Check and replace MAIN B/D End
Copyright © 2013 LG Electronics. Inc. All rights reserved. Only for training and service purposes
2 / 36
LGE Internal Use Only
Standard Repair Process
LCD TV
Error symptom
A. Video error
Picture broken/ Freezing
Established date
Revised date
2013. 01 .24 3/14
A5
Check RF Signal level
Normal Signal? N Check RF Cable Connection 1. Reconnection 2. Install Booster
Y
Check whether other equipments have problem or not. (By connecting RF Cable at other equipment) DVD Player ,Set-Top-Box, Different maker TV etc`
A6
Normal Picture? Y Check S/W Version SVC Bulletin? Y S/W Upgrade Contact with signal distributor or broadcaster (Cable or Air) Normal Picture? Y N Replace Main B/D N Check Tuner soldering Normal Picture? N Y
Close
N
Normal Picture? Y N
Close Close
Copyright © 2013 LG Electronics. Inc. All rights reserved. Only for training and service purposes
3 / 36
LGE Internal Use Only
Standard Repair Process
LCD TV
Error symptom
A. Video error
Tuning fail, Picture broken/ Freezing
Established date
Revised date
2013. 01 .24 4/14
A5
Check RF Signal level
Check RF signal cable Check whether other equipments have problem or not. (By connecting RF Cable at other equipment) Set-Top-Box, Different maker TV etc
A6
Normal Signal? N Y Check S/W Version SVC Bulletin? Y S/W Upgrade Contact with signal distributor or broadcaster N N Check Tuner soldering Replace Main B/D
Normal Picture? Y Close
Close
Copyright © 2013 LG Electronics. Inc. All rights reserved. Only for training and service purposes
4 / 36
LGE Internal Use Only
Standard Repair Process
LCD TV
Error symptom
A. Video error
Color error
Established date
Revised date
2013. 01. 24 5/14
A7
Check color by input -AV -COMPONENT -HDMI Y
A8/ A9
Color error? N Check error color input mode Check and replace Link Cable (LVDS) and contact condition Y Color error? N End Y Replace Main B/D Color error? N Replace module
A10
Check Test pattern
AV/ Component error
Check external device and cable
External device Y /Cable normal N Request repair for external device/cable
Replace Main B/D
N
HDMI error
Check external device and cable
External device Y /Cable normal
Replace Main B/D
Copyright © 2013 LG Electronics. Inc. All rights reserved. Only for training and service purposes
5 / 36
LGE Internal Use Only
Standard Repair Process
LCD TV
Error symptom
A. Video error
Vertical / Horizontal bar, residual image, light spot, external device color error
Established date
Revised date
2013. 01 .24 6/14
Vertical/Horizontal bar, residual image, light spot
A7
Check color condition by input -AV -Component -HDMI Screen Y normal? N Replace module
Replace Module
Check external device connection condition
A8/ A9
Y Normal? N Check and replace Link Cable Screen normal? Y End End N Replace Main B/D
N Screen normal? Y
A10
Check Test pattern
Request repair for external device
External device screen error-Color error
Check S/W Version Check version Y S/W Upgrade N Check screen condition by input -AV -Component -HDMI AV Input error Component error
Connect other external device and cable
(Check normal operation of External Input, Component, and HDMI by connecting Jig, pattern Generator ,Set-top Box etc. Connect other external device and cable
Screen normal? Y
N
Replace Main B/D
Request repair for external device Y Screen normal? N Replace Main B/D
Normal screen? Y
N
HDMI
(Check normal operation of External Input, Component, and HDMI by connecting Jig, pattern Generator ,Set-top Box etc.
Copyright © 2013 LG Electronics. Inc. All rights reserved. End Only for training and service purposes
6 / 36
LGE Internal Use Only
Standard Repair Process
LCD TV
Error symptom
B. Power error
No power
Established date
Revised date
2013. 01 .24 7/14
A11
Check Power LED
A13
Power LED On?
N Check Power cord was inserted properly Y DC Power on by pressing Power Key On Remote control Normal N operation? Y Replace Main B/D Check Power On `"High" OK? Y
. Stand-By: Red
Replace Power B/D
A4
N Normal? Y
Measure voltage of each output of Power B/D
Close
Check ST-BY 3.5V
Y Normal Y voltage?
Normal voltage? N
Y
Replace Main B/D
A12
N
Replace Power B/D
Replace Power B/D
Copyright © 2013 LG Electronics. Inc. All rights reserved. Only for training and service purposes
7 / 36
LGE Internal Use Only
Standard Repair Process
LCD TV
Check outlet
Error symptom
B. Power error
Off when on, off while viewing, power auto on/off
Established date
Revised date
2013. 01 .24 8/14
A14
Check A/C cord Error? N Check Power Off Mode CPU Abnormal Replace Main B/D Normal? N Y Abnormal 1 Replace Power B/D
Y
End
Check for all 3- phase power out
Fix A/C cord & Outlet and check each 3 phase out
A13
(If Power Off mode is not displayed) Check Power B/D voltage
Caution Check and fix exterior of Power B/D Part
Normal voltage? N
Y
Replace Main B/D
Replace Power B/D
* Please refer to the all cases which can be displayed on power off mode.
Power off List "POWEROFF_REMOTEKEY" "POWEROFF_OFFTIMER" "POWEROFF_SLEEPTIMER" "POWEROFF_INSTOP" Normal "POWEROFF_AUTOOFF" "POWEROFF_ONTIMER" "POWEROFF_RS232C" "POWEROFF_SWDOWN" "POWEROFF_UNKNOWN" "POWEROFF_ABNORMAL1" Abnormal "POWEROFF_CPUABNORMAL"
Status
Power Power Power Power Power Power Power Power Power Power Power
off off off off off off off off off off off
Explanation by REMOTE CONTROL by OFF TIMER by SLEEP TIMER by INSTOP KEY by AUTO OFF by ON TIMER by RS232C by S/W Download by unknown status except listed case by abnormal status except CPU trouble by CPU Abnormal
Copyright © 2013 LG Electronics. Inc. All rights reserved. Only for training and service purposes
8 / 36
LGE Internal Use Only
Standard Repair Process
LCD TV
Error symptom
C. Audio error
No audio/ Normal video
Established date
Revised date
2013. 01 .24 9/14
A15
No audio Screen normal Check user menu > Speaker off Off Y N
A16
Check audio B+ 24V of Power Board Normal voltage N Y
Cancel OFF
Replace Power Board and repair parts
Check Speaker disconnection
Disconnection Y Replace Speaker
N
Replace MAIN Board
End
Copyright © 2013 LG Electronics. Inc. All rights reserved. Only for training and service purposes
9 / 36
LGE Internal Use Only
Standard Repair Process
LCD TV
Error symptom
C. Audio error
Wrecked audio/ discontinuation/noise
Established date
Revised date
2013. 01 .24 10/14
abnormal audio/discontinuation/noise is same after "Check input signal" compared to No audio A16
Wrecked audio/ Discontinuation/ Noise for all audio Signal normal? Y Normal voltage? Replace Main B/D N Replace Power B/D (When RF signal is not received) Request repair to external cable/ANT provider (In case of External Input signal error) Check and fix external device Check and replace speaker and connector Check audio B+ Voltage (24V) Y
Check input signal -RF -External Input signal
N
Wrecked audio/ Discontinuation/ Noise only for RF
Wrecked audio/ Discontinuation/ Noise only for External Input Connect and check other external device Normal audio? Y
Replace Main B/D
End
N
Check and fix external device
Copyright © 2013 LG Electronics. Inc. All rights reserved. Only for training and service purposes
10 / 36
LGE Internal Use Only
Standard Repair Process
LCD TV
Error symptom
D. Function error
Remote control & Local switch checking
Established date
Revised date
2013. 02. 02 11/14 Replace Main B/D
1. Remote control(R/C) operating error
A17
Check R/C itself Operation Normal Y operating? N Check R/C Operating When turn off light in room If R/C operate, Explain the customer cause is interference from light in room. Check & Replace Baterry of R/C Check & Repair Cable connection Connector solder Normal operating? Y N
A17
Check B+ 3.5V On Main B/D Normal Voltage? N Y
A17
Check IR Output signal Normal Signal? N Repair/Replace IR B/D Y
A4
Close
Check 3.5v on Power B/D Replace Power B/D or Replace Main B/D (Power B/D don't have problem)
Normal operating? N Replace R/C
Close
Copyright © 2013 LG Electronics. Inc. All rights reserved. Only for training and service purposes
11 / 36
LGE Internal Use Only
Standard Repair Process
LCD TV
Error symptom
D. Function error
External device recognition error
Established date
Revised date
2013. 02. 02 12/14
Check input signal
Signal input?
Y
N
Check technical information - Fix information - S/W Version
Technical information? Y
N
External Input and Component Recognition error
Replace Main B/D
Check and fix external device/cable
Fix in accordance with technical information
RGB,HDMI/ DVI, Optical Recognition error
Replace Main B/D
Copyright © 2013 LG Electronics. Inc. All rights reserved. Only for training and service purposes
12 / 36
LGE Internal Use Only
Standard Repair Process
LCD TV
Error symptom
E. Noise
Circuit noise, mechanical noise
Established date
Revised date
2013. 02. 02 13/14
Identify nose type
Circuit noise
Check location of noise
Replace PSU(with LED driver) OR
Replace LED driver
Mechanical noise
Check location of noise When the nose is severe, replace the module (For models with fix information, upgrade the S/W or provide the description) If there is a "Tak Tak" noise from the cabinet, refer to the KMS fix information and then proceed as shown in the solution manual (For models without any fix information, provide the description)
Mechanical noise is a natural phenomenon, and apply the 1st level description. When the customer does not agree, apply the process by stage. Describe the basis of the description in "Part related to nose" in the Owner's Manual.
OR
OR
Copyright © 2013 LG Electronics. Inc. All rights reserved. Only for training and service purposes
13 / 36
LGE Internal Use Only
Standard Repair Process
LCD TV
Error symptom
F. Exterior defect
Exterior defect
Established date
Revised date
2013. 02. 02 14/14
Zoom part with exterior damage
Module damage
Replace module
Cabinet damage Remote controller damage
Replace cabinet
Replace remote controller
Stand dent
Replace stand
Copyright © 2013 LG Electronics. Inc. All rights reserved. Only for training and service purposes
14 / 36
LGE Internal Use Only
Contents of LCD TV Standard Repair Process Detail Technical Manual
No. 1 2 3 4 6 7 9 10 11 12 13 14 15 16 17 18 19 20
Copyright © 2013 LG Electronics. Inc. All rights reserved. Only for training and service purposes
Error symptom
Content Check LCD back light with naked eye
Page A1 A2 A3 A4 A5 A6 A7 A8 A9 A10 A8 A8 A9 A10 A-1/5 A-2/5 A-3/5 A-4/5 A-5/5
Remarks
A. Video error_ No video/Normal audio
LED driver B+ measuring method Check White Balance value Power Board voltage measuring method
A. Video error_ No video/Video lag/stop
TUNER input signal strength checking method LCD-TV Version checking method LCD TV connection diagram
A. Video error_Color error
Check Link Cable (LVDS) reconnection condition Adjustment Test pattern - ADJ Key LCD TV connection diagram
A. Video error_Vertical/Horizontal bar, residual image, light spot
Check Link Cable (LVDS) reconnection condition Adjustment Test pattern - ADJ Key Exchange T-Con Board (1) Exchange T-Con Board (2)
Defected Type caused by T-Con/ Inverter/ Module
Exchange LED driver Board (PSU) Exchange Module itself (1) Exchange Module itself (2)
15 / 36
Continue to the nextInternal Use Only LGE page
Contents of LCD TV Standard Repair Process Detail Technical Manual
Continued from previous page
No. 21 22 23 24 25 26 28 C. Audio error_No audio/Normal video 29 30 31 C. Audio error_Wrecked audio/discontinuation D. Function error_ No response in remote controller, key error B. Power error_Off when on, off while viewing POWER OFF MODE checking method Checking method in menu when there is no audio Voltage and speaker checking method when there is no audio Voltage and speaker checking method in case of audio error Remote controller operation checking method A14 A15 A16 A16 A17 B. Power error_No power Error symptom Content Check front display LED Check power input Voltage & ST-BY 3.5V Checking method when power is ON POWER BOARD voltage measuring method Page A11 A12 A13 A4 Remarks
Copyright © 2013 LG Electronics. Inc. All rights reserved. Only for training and service purposes
16 / 36
LGE Internal Use Only
Standard Repair Process Detail Technical Manual
LCD TV
Error symptom Content
A. Video error_No video/Normal audio
Check Back Light On with naked eye
Established date Revised date
2013. 02.15 A1
Power On -> disjoint back case -> check lighting from the module
Copyright © 2013 LG Electronics. Inc. All rights reserved. Only for training and service purposes
17 / 36
LGE Internal Use Only
Standard Repair Process Detail Technical Manual
LCD TV
Error symptom Content
A. Video error_No video/Normal audio
Inverter B+ 24V measuring method
Established date Revised date
2013. 02 .15 A2
Measure DC Voltage applying to Module from Power Board. *Output Voltage from Power Board -> supply to Module. Check Pin contacting statement and connection statement.
Copyright © 2013 LG Electronics. Inc. All rights reserved. Only for training and service purposes
*Output Voltage is depend on inch 32 inch : 65.6~86.9V 39 inch : 117.3~142.2V 42 inch : 141.8~164.3V
18 / 36
LGE Internal Use Only
Standard Repair Process Detail Technical Manual
LCD TV
Error