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LG 32LC7D Service Manual
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LG 32LC7D Service Manual

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LCD TV

SERVICE MANUAL

CHASSIS : LD73A
MODEL : 32LC7D
MODEL :
MODEL :
CAUTION
BEFORE SERVICING THE CHASSIS,
READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
32LC55
32LC56
R
website:http://biz.LGservice.com
32LC7D-ZA
32LC55-ZA
32LC56-ZC

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Summary of Contents for LG 32LC7D

  • Page 1: Service Manual

    LCD TV SERVICE MANUAL CHASSIS : LD73A MODEL : 32LC7D 32LC7D-ZA MODEL : 32LC55 32LC55-ZA MODEL : 32LC56 32LC56-ZC CAUTION BEFORE SERVICING THE CHASSIS, READ THE SAFETY PRECAUTIONS IN THIS MANUAL.

  • Page 2: Table Of Contents

    CONTENTS CONTENTS ....................2 PRODUCT SAFETY ..................3 SPECIFICATION ..................6 ADJUSTMENT INSTRUCTION ..............9 TROUBLE SHOOTING ................14 BLOCK DIAGRAM...................22 EXPLODED VIEW .................. 24 REPLACEMENT PARTS LIST ............... 26 SVC. SHEET ....................- 2 -...

  • Page 3: Product Safety

    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 Replacement Parts List. 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.

  • Page 4: Servicing Precautions

    SERVICING PRECAUTIONS CAUTION: Before servicing receivers covered by this service unit under test. manual and its supplements and addenda, read and follow the 2. After removing an electrical assembly equipped with ES SAFETY PRECAUTIONS on page 3 of this publication. devices, place the assembly on a conductive surface such as NOTE: If unforeseen circumstances create conflict between the aluminum foil, to prevent electrostatic charge buildup or...
  • Page 5 IC Remove/Replacement Some chassis circuit boards have slotted holes (oblong) through Circuit Board Foil Repair which the IC leads are inserted and then bent flat against the Excessive heat applied to the copper foil of any printed circuit circuit foil. When holes are the slotted type, the following technique board will weaken the adhesive that bonds the foil to the circuit should be used to remove and replace the IC.

  • Page 6: Specification

    SPECIFICATION NOTE : Specifications and others are subject to change without notice for improvement. 1. General Specification(TV) Item Specification Remark Video input applicable system PAL-D/K, B/G, I, SECAM Receivable Broadcasting System 1) PAL/SECAM BG EU(PAL Market) 2) PAL/SECAM DK 3) PAL I/I 4) SECAM L/L' 5) DVB-T RF Input Channel...
  • Page 7 3. Optical Feature(LCD Module-LPL) Item Specification Min. Typ. Max. Remark Viewing Angle [CR>10] R/L, U/D 178, 178 Luminance Luminance(cd/m 32” Variation MAX/MIN Contrast Ratio CR(32") All White/All Black (With)(32") 1200 1600 All White/All Black CIE Color Coordinates White 0.285 LPL(26”) -0.03 0.293 +0.03...
  • Page 8 7. HDMI DTV Mode Table Resolution H-freq(kHz) V-freq.(Hz) Pixel clock(MHz) Remark Proposed 640X480 31.50 59.94 25.175 SDTV 480p 60Hz 640X480 31.50 25.20 SDTV 480p 60Hz 720X480 31.47 59.94 27.00 SDTV 480p 60Hz 720X480 31.47 27.027 SDTV 480p 60Hz 720X576 31.25 50.00 27.000 SDTV 576p 50Hz...

  • Page 9: Adjustment Instruction

    [Channel Download] => [Write Batch]. This spec. sheet is applied to all of the LD73A chassis Next, select proper binary file(*.bin) including the CH manufactured at LG TV Plant all over the world. information for each model at [Channel Download] => [NVRAM File].

  • Page 10: Edid Data

    Dait(Hex) 26LC4D-ZA 000000FC0032364C4334442D5A410A202020 26LC7D-ZA 000000FC0032364C4337442D5A410A202020 4.2. Data 32LC4D-ZA 000000FC0033374C4334442D5A410A202020 (1) ANALOG (128 bytes) 32LC7D-ZA 000000FC0033324C4337442D5A410A202020 0x00 0x01 0x02 0x03 0x04 0x05 0x06 0x07 0x08 0x09 0x0A 0x0B 0x0C 0x0D 0x0E 0x0F 37LC4D-ZA 000000FC0033374C4334442D5A410A202020 0x00 0 0x01 37LC7D-ZA 000000FC0033374C4337442D5A410A202020 0x02 11...
  • Page 11 * Before AV ADC Calibration, should be executed the “Tool option 1” 6. ADC Calibration 5. Select method of Tool option 1 RF/AV/S-VIDEO Component RGB-PC MSPG925F PALJ Model:215 (720P) Model: 3 1) Press ADJ Key in the Adjust remote control. 2) Select “Tool option 1”...

  • Page 12: White Balance

    6.3 Adjustment of RGB (1) Required Equipments - Remote controller for adjustment - MSPG-925F Pattern Generator (Which has XGA [1024*768] 60Hz 8 Color Bar pattern shown in Fig. 1) (2) Method of Auto RGB Color Balance 1) Input the PC 1024x768@60Hz 100% Color Bar pattern <Fig.
  • Page 13 8. Set information(Serial No & Model name) (1) Setting up like bottom figure (After setting white balance, this is set) 1) Press ADJ Key in the Adjust remocon. 2) Select “System Control 2” by using (CH+/-) key, and press (ENTER). 3) Using Adjust remocon, RS-232 Host &...

  • Page 14: Troubleshooting

    TROUBLESHOOTING 1. Power Board 1-1. The full flowchart for the voltage output Start check Is it Is the Interface Does the whole identical to when the signal operating? screen appear? power is off? 1. Check the Power Off 2. Check the Interface status.
  • Page 15 2. No Power (1) Symptom 1) Does not minute discharge at module. 2) Non does not come into the front LED. (2) Procedure check Is the power cord plugged in? Plug in the power cord. Is the Line Filter and Power Connect the Cable.
  • Page 16 3. Protect Mode (1) Symptom 1) After lighting up once, it does not discharge minutely from module. 2) The rely falls.(there is an audible “click”) 3) The color of the front LED turns from green to red. (2) Procedure check Is the Power Board Is the output Low/High voltage normal Replace the Power Board.
  • Page 17 4. No Raster (1) Symptom 1) No OSD and image occur at screen. 2) It maintains the condition where the front LED is green. (2) Procedure check Is the Low/High output Does minute discharge Replace the Power Is the VAVS on? At Module? voltage normal except for board...
  • Page 18 5. In case of strange screen display in specific modes 5-1. In case of no OSD display (1) Symptom 1) LED is green. 2) The minute discharge is continuously accomplished from the module. (2) Procedure check Is the LVDS cable Is the LVDS cable Replace the cable.
  • Page 19 5-2. In case there is no display on the screen in specific modes (1) Symptom 1) There is no screen display from a specific input mode (RF, AV, Component, RGB, DVI). (2) Procedure check 1) Check the all input modes have normal display. 2) Check the video(main)/ data(sub), video(main)/ video(sub) have normal displays from the PIP mode or DW mode(re-check it/ swap).
  • Page 20 (5) In case of an unusual display in Component, RGB mode Are the R,G,B input and H,V Check the input source Sync of the J1100 normal? Same as Block A (6) In case of an unusual display in HDMI mode Is the HDMI002(IC1004) Are Input voltage, IIC Communication Replace the IC.

  • Page 21: In Case Of No Sound

    6. In case of no sound (1) Symptom 1) LED is Green. 2) Screen display appears but there is no sound. (2) Procedure check Is there no sound for Set on speaker on in Is the speaker on? All input(modes)? menu.

  • Page 22: Block Diagram

    BLOCK DIAGRAM - 22 -...
  • Page 23 MEMO - 23 -...

  • Page 24: Exploded View

    EXPLODED VIEW - 24 -...

  • Page 25: Exploded View Parts List

    PCB Assembly,Sub SUB T.T LD73A 42LC7D-ZA AEUVLHX IR/LED TOTAL MKC34384901 Window MOLD PMMA WINDOW 32/37/42/47LC7 PMMA LED & PRE AMP MES36332301 Indicator MOLD ABS LED&PRE AMP 47LC7 PMMA 7 PHY NONE EBR36262801 PCB Assembly,Sub SUB T.T LD73A 32LC7D-ZA AEUVLHX SIDE A/V TOTAL - 25 -...

  • Page 26: Replacement Parts List

    REPLACEMENT PARTS LIST DATE: 2007. 04. 02. LOC. NO. PART NO. DESCRIPTION / SPECIFICATION LOC. NO. PART NO. DESCRIPTION / SPECIFICATION CAPACITORs C117 0CK104CF56A 0603B104K160CT 100nF 10% 16V X7R -55TO+125C C118 0CE106WFKDC MVK4.0TP16VC10M 10uF 20% 16V 16MA -40TO+105 0CH3104K566 0805B104K500CT 100nF 10% 50V X7R -55TO+125C C119 0CK104CF56A 0603B104K160CT 100nF 10% 16V X7R -55TO+125C...
  • Page 27 LOC. NO. PART NO. DESCRIPTION / SPECIFICATION LOC. NO. PART NO. DESCRIPTION / SPECIFICATION C1314 0CC030CK01A 0603N3R0C500LT 3pF 0.25PF 50V C0G -55TO+125 C138 0CK104CF56A 0603B104K160CT 100nF 10% 16V X7R -55TO+125C C1315 0CC030CK01A 0603N3R0C500LT 3pF 0.25PF 50V C0G -55TO+125 C139 0CK104CF56A 0603B104K160CT 100nF 10% 16V X7R -55TO+125C C1316 0CK104CK56A...
  • Page 28 LOC. NO. PART NO. DESCRIPTION / SPECIFICATION LOC. NO. PART NO. DESCRIPTION / SPECIFICATION C159 0CK104CF56A 0603B104K160CT 100nF 10% 16V X7R -55TO+125C C203 0CK104CF56A 0603B104K160CT 100nF 10% 16V X7R -55TO+125C C160 0CK104CF56A 0603B104K160CT 100nF 10% 16V X7R -55TO+125C C204 0CK103CK56A 0603B103K500CT 10nF 10% 50V X7R -55TO+125C C161 0CK104CF56A...
  • Page 29 LOC. NO. PART NO. DESCRIPTION / SPECIFICATION LOC. NO. PART NO. DESCRIPTION / SPECIFICATION C517 0CE227WF6DC MVK8.0TP16VC220M 220uF 20% 16V 80MA -40TO+1 C636 0CK103CK56A 0603B103K500CT 10nF 10% 50V X7R -55TO+125C C518 0CK104CF56A 0603B104K160CT 100nF 10% 16V X7R -55TO+125C C637 0CK472CK56A 0603B472K500CT 4.7nF 10% 50V X7R -55TO+125C C519 0CE107WF6DC...
  • Page 30 LOC. NO. PART NO. DESCRIPTION / SPECIFICATION LOC. NO. PART NO. DESCRIPTION / SPECIFICATION C752 0CK104CK56A 0603B104K500CT 100nF 10% 50V X7R -55TO+125C C810 0CK103CK56A 0603B103K500CT 10nF 10% 50V X7R -55TO+125C C753 0CK104CK56A 0603B104K500CT 100nF 10% 50V X7R -55TO+125C C812 0CK103CK56A 0603B103K500CT 10nF 10% 50V X7R -55TO+125C C754 0CK104CK56A...
  • Page 31 LOC. NO. PART NO. DESCRIPTION / SPECIFICATION LOC. NO. PART NO. DESCRIPTION / SPECIFICATION C917 0CK104CK56A 0603B104K500CT 100nF 10% 50V X7R -55TO+125C ZD1104 EAH33945901 CDS3C30GTH 30V 50V 120V 1.9A 1W SOD123 R/TP C924 0CE107WH6DC MVK8.0TP25VC100M 100uF 20% 25V 180MA -40TO+ ZD1105 EAH33945901 CDS3C30GTH 30V 50V 120V 1.9A 1W SOD123 R/TP...
  • Page 32 LOC. NO. PART NO. DESCRIPTION / SPECIFICATION LOC. NO. PART NO. DESCRIPTION / SPECIFICATION IC504 0IPMGKE031A KIA78R33F 4TO10V 3.3V 8W DPAK R/TP 5P KEC Q901 0TR387500AA 2SC3875S(ALY) NPN 5V 60V 50V 150MA 100NA 70 IC505 0IPMGKE031A KIA78R33F 4TO10V 3.3V 8W DPAK R/TP 5P KEC Q902 0TR387500AA 2SC3875S(ALY) NPN 5V 60V 50V 150MA 100NA 70...
  • Page 33 LOC. NO. PART NO. DESCRIPTION / SPECIFICATION LOC. NO. PART NO. DESCRIPTION / SPECIFICATION R1022 0RJ0222D677 MCR03EZPJ220 22OHM 5% 1/10W 1608 R/TP ROHM R1117 0RJ0752D677 MCR03EZPJ750 75OHM 5% 1/10W 1608 R/TP ROHM R1023 0RJ0222D677 MCR03EZPJ220 22OHM 5% 1/10W 1608 R/TP ROHM R1118 0RJ1001D677 MCR03EZPJ102 1KOHM 5% 1/10W 1608 R/TP ROHM...
  • Page 34 LOC. NO. PART NO. DESCRIPTION / SPECIFICATION LOC. NO. PART NO. DESCRIPTION / SPECIFICATION R1213 0RJ4703D677 MCR03EZPJ474 470KOHM 5% 1/10W 1608 R/TP RO R1286 0RH0000D622 MCR10EZHJ000 0OHM 5% 1/8W 2012 R/TP ROHM R1214 0RJ0752D677 MCR03EZPJ750 75OHM 5% 1/10W 1608 R/TP ROHM R1287 0RH0000D622 MCR10EZHJ000 0OHM 5% 1/8W 2012 R/TP ROHM...
  • Page 35 LOC. NO. PART NO. DESCRIPTION / SPECIFICATION LOC. NO. PART NO. DESCRIPTION / SPECIFICATION R1355 0RJ0122D677 MCR03EZPJ120 12OHM 5% 1/10W 1608 R/TP ROHM R1454 0RJ4703D677 MCR03EZPJ474 470KOHM 5% 1/10W 1608 R/TP RO R1356 0RJ0122D677 MCR03EZPJ120 12OHM 5% 1/10W 1608 R/TP ROHM R1455 0RJ4701D677 MCR03EZPJ472 4.7KOHM 5% 1/10W 1608 R/TP RO...
  • Page 36 LOC. NO. PART NO. DESCRIPTION / SPECIFICATION LOC. NO. PART NO. DESCRIPTION / SPECIFICATION R1728 0RJ0332D677 MCR03EZPJ330 33OHM 5% 1/10W 1608 R/TP ROHM R183 0RJ3300D677 MCR03EZPJ331 330OHM 5% 1/10W 1608 R/TP ROH R1729 0RJ0332D677 MCR03EZPJ330 33OHM 5% 1/10W 1608 R/TP ROHM R184 0RJ3300D677 MCR03EZPJ331 330OHM 5% 1/10W 1608 R/TP ROH...
  • Page 37 LOC. NO. PART NO. DESCRIPTION / SPECIFICATION LOC. NO. PART NO. DESCRIPTION / SPECIFICATION R244 0RJ0222D677 MCR03EZPJ220 22OHM 5% 1/10W 1608 R/TP ROHM R523 0RJ1001D677 MCR03EZPJ102 1KOHM 5% 1/10W 1608 R/TP ROHM R245 0RJ0222D677 MCR03EZPJ220 22OHM 5% 1/10W 1608 R/TP ROHM R524 0RJ0000D677 MCR03EZPJ000 0OHM 5% 1/10W 1608 R/TP ROHM...
  • Page 38 LOC. NO. PART NO. DESCRIPTION / SPECIFICATION LOC. NO. PART NO. DESCRIPTION / SPECIFICATION R654 0RJ0000D677 MCR03EZPJ000 0OHM 5% 1/10W 1608 R/TP ROHM R734 0RJ1000C678 MCR01MZPJ101 100OHM 5% 1/16W 1005 R/TP ROH R655 0RJ1002D677 MCR03EZPJ103 10KOHM 5% 1/10W 1608 R/TP ROH R735 0RJ1002D677 MCR03EZPJ103 10KOHM 5% 1/10W 1608 R/TP ROH...
  • Page 39 LOC. NO. PART NO. DESCRIPTION / SPECIFICATION LOC. NO. PART NO. DESCRIPTION / SPECIFICATION R813 0RJ0222C678 MCR01MZPJ220 22OHM 5% 1/16W 1005 R/TP - RO L103 6210TCE001G Filter,Bead HH-1M3216-501JT 500OHM R816 0RJ0000D677 MCR03EZPJ000 0OHM 5% 1/10W 1608 R/TP ROHM L104 6210TCE001G Filter,Bead HH-1M3216-501JT 500OHM R818 0RJ1002D677...
  • Page 40 SMW200-14P 14P 2.00MM 1R STRAIGHT DIP ST NA P800 6630V90116A FI-X30SSL-HF 30P 1.00MM 1R ANGLE SMD TP WHI MFL34441603 Manual,Owners PRINTING USER LD61C LG P900 6602T25008M SMW250-13P 13P 2.50MM 1R STRAIGHT DIP ST NA MKJ32022813 Remote Controller COMPLEX LD73A 26LC4...
  • Page 41 P/No : EBY36717302(1/4) 2007.01.26...
  • Page 42 P/No : EBY36717302(2/4) 2007.01.26...
  • Page 43 P/No : EBY36717302(3/4) 2007.01.26...
  • Page 44 Mar., 2007 P/NO : MFL36695308 Printed in Korea...

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