Panasonic TX-LR50B6 Service Manual
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Panasonic TX-LR50B6 Service Manual

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TABLE OF CONTENTS

1 Safety Precautions----------------------------------------------- 3
1.1. General Guidelines---------------------------------------- 3
1.1.1. Leakage Current Cold Check---------------------- 3
1.) --------------------------------------------------------- 3
2 Warning -------------------------------------------------------------- 4
2.2. About lead free solder (PbF)---------------------------- 5
3 Service Navigation ----------------------------------------------- 6
3.1. Service Hint ------------------------------------------------- 6
4 Specifications ----------------------------------------------------- 7
5 Service Mode ------------------------------------------------------ 8
5.1. How to enter into Service Modes ---------------------- 8
5.1.1. Contents of adjustment mode --------------------- 8
5.1.2. How to exit---------------------------------------------- 8
5.1.3. Display of SOS History ------------------------------ 9
5.1.4. POWER ON TIME/COUNT ------------------------ 9
5.1.5. Exit-------------------------------------------------------- 9
5.1.6. Self Check Mode-------------------------------------10
Model No.
Chassis:
Destination:
PAGE
5.1.7. Hotel Mode Adjustment ---------------------------- 10
5.1.8. Hotel Mode-------------------------------------------- 10
6 Troubleshooting Guide --------------------------------------- 11
6.1. Check of the IIC bus lines------------------------------ 11
6.1.1. How to access --------------------------------------- 11
6.1.2. Exit ------------------------------------------------------ 11
6.2. Power LED Blinking timing chart --------------------- 12
6.3. No Power--------------------------------------------------- 12
7.1. Speaker Bracket ----------------------------------------- 13
7.2. LCD Panel Assembly ----------------------------------- 14
7.4. LED Panel and Bracket Ass'y------------------------- 16
7.5. Vesa Metal ------------------------------------------------- 18
7.6. Side Metal Bracket--------------------------------------- 19
7.7. Metal Bracket 1 ------------------------------------------- 20
7.8. Metal Bracket 2 ------------------------------------------- 21
7.9. Metal Bracket Bottom ---------------------------------- 22
7.10. PCB Installation ------------------------------------------ 23
7.11. Pedestal Ass'y 1------------------------------------------ 24
ORDER NO. MTV1301138CE
TX-LR50B6
KM21E
CIS
© Panasonic Corporation 2013.
LCD TV
PAGE

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  • Page 1: Table Of Contents

    5.1.3. Display of SOS History ------------------------------ 9 7.8. Metal Bracket 2 ------------------------------------------- 21 5.1.4. POWER ON TIME/COUNT ------------------------ 9 7.9. Metal Bracket Bottom ---------------------------------- 22 7.10. PCB Installation ------------------------------------------ 23 5.1.5. Exit-------------------------------------------------------- 9 5.1.6. Self Check Mode-------------------------------------10 7.11. Pedestal Ass’y 1------------------------------------------ 24 © Panasonic Corporation 2013.
  • Page 2 TX-LR50B6 7.12. Pedestal Ass’y 2------------------------------------------ 25 7.13. Stand MTG Assy ----------------------------------------- 25 7.14. Back Cover Installation --------------------------------- 27 7.15. Handling SPEC ------------------------------------------- 28 8 Measurements and Adjustments -------------------------- 29 8.1. Voltage chart of A-board-------------------------------- 29 8.2. Voltage chart of P-board-------------------------------- 29 9 Block Diagram --------------------------------------------------- 30 9.1.

  • Page 3: Safety Precautions

    TX-LR50B6 1 Safety Precautions 1.1. General Guidelines 1. When servicing, observe the original lead dress. If a short circuit is found, replace all parts which have been overheated or damaged by the short circuit. 2. After servicing, see to it that all the protective devices such as insulation barriers, insulation papers shields are properly installed.

  • Page 4: Warning

    TX-LR50B6 2 Warning 2.1. Prevention of Electrostatic Discharge (ESD) to 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.

  • Page 5: About Lead Free Solder (Pbf)

    TX-LR50B6 2.2. About lead free solder (PbF) Note: Lead is listed as (Pb) in the periodic table of elements. In the information below, Pb will refer to Lead solder, and PbF will refer to Lead Free Solder. The Lead Free Solder used in our manufacturing process and discussed below is (Sn+Ag+Cu).

  • Page 6: Service Navigation

    TX-LR50B6 3 Service Navigation 3.1. Service Hint Board Name Main Device Remarks A BOARD TUN, OFDM, ADV, LD4, STBY EEP Repairable P BOARD Power Supply (For 32” include function SW) Repairable GK BOARD Function SW Repairable K BOARD LED/RM/CATS Repairable...

  • Page 7: Specifications

    TX-LR50B6 4 Specifications Power source AC 220-240 V, 50/60 Hz Rated power consumption 136 W 0.2 W Standby power consumption Panel LED LCD panel Visible screen size (diagonal) 126 cm (50 inches) 2,073,600 (1,920 (W)  1,080 (H)) Display Resolution Sound (100 mm ...

  • Page 8: Service Mode

    TX-LR50B6 5 Service Mode 5.1. How to enter into Service Modes While pressing [VOLUME ( - )] button of the main unit, press [INFO] button of the remote control three times within 2 seconds. Contents of adjustment mode 5.1.1. • Value is shown as a hexadecimal number.

  • Page 9: Display Of Sos History

    TX-LR50B6 5.1.3. Display of SOS History SOS History (Number of LED blinking) indication. From left side; Last SOS, before Last, three occurrence before, 2nd occurrence after shipment, 1st occurrence after shipment. This indication except 2nd and 1st occurrence after shipment will be cleared by [Self-check indication and forced to factory shipment setting].

  • Page 10: Self Check Mode

    TX-LR50B6 5.1.6. Self Check Mode 1. Press the ‘MENU’ button (on the remote control) and the ‘VOL DOWN’ button on the LCD panel. 2. Press ON/OFF button on the panel to Exit. NOTE: After self check, the following process need to follow.

  • Page 11: Troubleshooting Guide

    TX-LR50B6 6 Troubleshooting Guide Use the self-check function to test the unit. 1. Checking the IIC bus lines 2. Power LED Blinking timing 6.1. Check of the IIC bus lines 6.1.1. How to access Self-check indication only: Produce TV reception screen, and while pressing [VOLUME ( - )] button on the main unit, press [OK] button on the remote control for more than 3 seconds.

  • Page 12: Power Led Blinking Timing Chart

    TX-LR50B6 6.2. Power LED Blinking timing chart 1. Subject Information of LED Flashing timing chart. 2. Contents When an abnormality occurs, the protection circuit will operate and reset the unit to stand by mode. During this time, the defective block can be identified by the number of blinking times of the Power LED on the front panel of the unit as follow:...

  • Page 13: Disassembly And Assembly Instructions

    TX-LR50B6 7 Disassembly and Assembly Instructions 7.1. Speaker Bracket 1. Fix Speaker Left & Right. 2. Fix Key button. 3. Stick SPONGE at speaker (Left & Right). Description Remarks SPEAKER UNIT KEY BUTTON BRACKET 10  100  10t SPONGE 10 ...

  • Page 14: Lcd Panel Assembly

    TX-LR50B6 7.2. LCD Panel Assembly Install LCD panel to cabinet. Description LCD PANEL...

  • Page 15: Lcd Panel Fixing & Handling Method

    TX-LR50B6 7.3. LCD Panel Fixing & Handling Method 1. Place down the cabinet as shown below. 2. Fix LCD panel into the cabinet by taking below precautions. Other general precautions 1. Do not press panel surface to avoid blue spot on the panel display.

  • Page 16: Led Panel And Bracket Ass'y

    TX-LR50B6 7.4. LED Panel and Bracket Ass’y 1. Fixing wire A10 to K PCB. 2. Fixing K PCB to LED Panel. 3. Fixing LED Panel to cabinet.
  • Page 17 TX-LR50B6 Description LED PANEL CONDUCTIVE TAPE GASKET...

  • Page 18: Vesa Metal

    TX-LR50B6 7.5. Vesa Metal 1. Fix Vesa Metal & screw. 2. Stick felt at all Vesa Metal - 4 pcs. Description Remarks VESA METAL 23  23  0.55t (8mm hole) FELT 20  24  0.35t FELT...

  • Page 19: Side Metal Bracket

    TX-LR50B6 7.6. Side Metal Bracket Description METAL_BRACKET-SIDE (L/R)

  • Page 20: Metal Bracket

    TX-LR50B6 7.7. Metal Bracket 1 Description METAL LED DRIVER METAL VERTICAL L METAL VERTICAL R METAL MTG A BOARD...

  • Page 21: Metal Bracket

    TX-LR50B6 7.8. Metal Bracket 2 1. Fix screw all screw. 2. Stick felt at LCD Panel (Control Button & speaker area). Description Remarks SCREW (P10/A4/DRIVER4/VESA4) 6 ±1 kgf.cm 8  110  0.35t FELT 15  160  0.9t FELT...

  • Page 22: Metal Bracket Bottom

    TX-LR50B6 7.9. Metal Bracket Bottom 1. Fix screw at bottom cover. 2. Fix screw at Metal Bracket Bottom. Description Remarks METAL BRACKET BOTTOM BOTTOM COVER SCREW (P10/A4/DRIVER4/VESA4) 6 ±1 kgf.cm SCREW (BTM MTG4) 7~8 kgf.cm SCREW (SP4/BTM CVR2) 8 ±1 kgf.cm 10 ...

  • Page 23: Pcb Installation

    TX-LR50B6 7.10. PCB Installation 1. Install P & A-Board and fix it with screws. 2. Install Side AV Bracket and fix with screws. Description Remarks SCREW (A3/P4/L2/VESA4/FRAME9) 6 ±1 kgf.cm SCREW (SP4/BTM CVR2) 8 ±1 kgf.cm CHASSIS BRACKET A-PCB CHASSIS BRACKET (LED)

  • Page 24: Pedestal Ass'y

    TX-LR50B6 7.11. Pedestal Ass’y 1 Fix Rubber foot 6 pc at base cover. Part No Description TBL5ZA34581 PEDESTAL BASE TBL5ZB33341 BASE COVER TMK4GA027 FELT TBL5ZA34511 NECK BASE...

  • Page 25: Pedestal Ass'y

    TX-LR50B6 7.12. Pedestal Ass’y 2 Fix Rubber foot 7 pc at base cover. Part No Description Remarks TBL4GG3009 RUBBER FOOT XTS4 + 10GFJ SCREW 11 ± 2 kgf.cm XYN5 + F15FJ SCREW 14 ± 2 kgf.cm...
  • Page 26 TX-LR50B6 7.13. Stand MTG Assy 1. Insert stand metal in plastic bag. 2. Insert screw in plastic bag (2 type). 3. Take out seperator double side tape and Fold plastic bag. Part No Description TPE4GH100 TBL5ZA34551 STAND_METAL XYN4 + F12FJK...

  • Page 27: Back Cover Installation

    TX-LR50B6 7.14. Back Cover Installation 1. Install Back Cover. 2. Fix screws. Part No Description Remarks TKU3FC01001 BACK COVER THEC1509 SCREW (AC INLET) 6 ± 1 kgf.cm XTV3+10GFJK SCREW (TERMINAL5/L2/CTRL2) 6 ± 1 kgf.cm THTD030J SCREW (BC17) 11 ± 2 kgf.cm...

  • Page 28: Handling Spec

    TX-LR50B6 7.15. Handling SPEC ■ Moving the LCD module The module should be handle by two people and hold on that top and bottom long side by both hands without module warping. Never handle the module with keeping horizontal position when moving the module in order to avoid internal damage and deformation.

  • Page 29: Measurements And Adjustments

    TX-LR50B6 8 Measurements and Adjustments 8.1. Voltage chart of A-board Set A-Board to a dummy set and check the satisfaction with the specified voltage as following table. Power Supply Name Measurement Point Specification PNL12V TP4097 12.1 ± 0.8V SUB3.3V TP5400 3.32 ±...

  • Page 30: Block Diagram

    TX-LR50B6 9 Block Diagram 9.1. Main Block Diagram XERWE0 XERWE0 STB5/5VS S12/S5 CPU BUS CTRL AAR/DATA XECS1 S5/ S3.3 (SD-Data-VCC) ERXW CI_POWER_ON > S9-REG BOOTSWAP Analog < CI_OCP 3.3/1.8 XRST ASIC UHS-1 < (SDVOLC) Only SAT models Power XRSTSTM AN34043A...

  • Page 31: Wiring Connection Diagram

    TX-LR50B6 10 Wiring Connection Diagram 10.1. Wire Dressing 1 Do wire dressing follow below spec. Description Remarks 0.07  9 PET TAPE (GREY W=15mm) 0.63 0.10  6 PET TAPE (GREY W=15mm) LVDS CABLE AL-PET TAPE...

  • Page 32: Wire Dressing

    TX-LR50B6 10.2. Wire Dressing 2 Stick sponge at LVDS cable. Description SPONGE SPONGE LVDS CABLE...

  • Page 33: Schematic Diagram

    TX-LR50B6 11 Schematic Diagram Model No. : TX-LR50B6 A-Board (1/19)
  • Page 34 Model No. : TX-LR50B6 A-Board (2/19-1)
  • Page 35 Model No. : TX-LR50B6 A-Board (2/19-2)
  • Page 36 Model No. : TX-LR50B6 A-Board (3/19)
  • Page 37 Model No. : TX-LR50B6 A-Board (4/19)
  • Page 38 Model No. : TX-LR50B6 A-Board (5/19)
  • Page 39 Model No. : TX-LR50B6 A-Board (6/19)
  • Page 40 Model No. : TX-LR50B6 A-Board (7/19-1)
  • Page 41 Model No. : TX-LR50B6 A-Board (7/19-2)
  • Page 42 Model No. : TX-LR50B6 A-Board (8/19)
  • Page 43 Model No. : TX-LR50B6 A-Board (9/19)
  • Page 44 Model No. : TX-LR50B6 A-Board (10/19)
  • Page 45 Model No. : TX-LR50B6 A-Board (11/19)
  • Page 46 Model No. : TX-LR50B6 A-Board (12/19)
  • Page 47 Model No. : TX-LR50B6 A-Board (13/19)
  • Page 48 Model No. : TX-LR50B6 A-Board (14/19)
  • Page 49 Model No. : TX-LR50B6 A-Board (15/19)
  • Page 50 Model No. : TX-LR50B6 A-Board (16/19)
  • Page 51 Model No. : TX-LR50B6 A-Board (17/19)
  • Page 52 Model No. : TX-LR50B6 A-Board (18/19)
  • Page 53 Model No. : TX-LR50B6 A-Board (19/19)
  • Page 54 Model No. : TX-LR50B6 GK-Board...
  • Page 55 Model No. : TX-LR50B6 K-Board...
  • Page 56 Model No. : TX-LR50B6 LD-Board...
  • Page 57 Model No. : TX-LR50B6 P-Board...

  • Page 58: Printed Circuit Board

    TX-LR50B6 12 Printed Circuit Board Model No. : TX-LR50B6 A-Board (Top Component Side)
  • Page 59 Model No. : TX-LR50B6 A-Board (Bottom Component Side)
  • Page 60 Model No. : TX-LR50B6 GK-Board...
  • Page 61 Model No. : TX-LR50B6 K-Board...
  • Page 62 Model No. : TX-LR50B6 LD-Board...
  • Page 63 Model No. : TX-LR50B6 P-Board (Top Component Side)
  • Page 64 Model No. : TX-LR50B6 P-Board (Bottom Component Side)

  • Page 65: Exploded View And Replacement Parts List

    TX-LR50B6 13 Exploded View and Replacement Parts List Model No. : TX-LR50B6 Parts Location...
  • Page 66 Model No. : TX-LR50B6 Packing Exploded View 1...
  • Page 67 Model No. : TX-LR50B6 Packing Exploded View 2...
  • Page 68 Model No. : TX-LR50B6 Parts List Ref. Change Safety Part No. Part Name & Description Q'ty Remarks CAPACITORS C1958 F1G1E103A059 C 0.01UF 25V C2000 F1G1A105A047 C 1UF 10V C2009 F1G1H1020008 C 1000PF 50V C2014 F1K1E106A134 C 10UF, 25V C2017 F1G1H1020008...
  • Page 69 Model No. : TX-LR50B6 Parts List Ref. Change Safety Part No. Part Name & Description Q'ty Remarks C4701 F1H0J105A051 C 1UF, 6.3V C4900 F1K1V106A010 C 10UF, 25V C4901 F1K1V106A010 C 10UF, 25V C4902 F1J1E105A287 C 1UF, 25V C4903 F1K1V106A010 C 10UF, 25V...
  • Page 70 Model No. : TX-LR50B6 Parts List Ref. Change Safety Part No. Part Name & Description Q'ty Remarks C5721 F1G1E333A059 C 0.033UF, 25V C5723 F1G1E333A144 C 0.033UF 25V C6704 F1J1A106A043 C 10UF, 10V C6707 F1G1C104A077 C 0.1UF 16V C6708 F1J1A106A043 C 10UF, 10V...
  • Page 71 Model No. : TX-LR50B6 Parts List Ref. Change Safety Part No. Part Name & Description Q'ty Remarks C7315 F1A3A471A060 C 470PF 1KV C7316 F1A3A471A060 C 470PF 1KV C7317 ECWH8223HAC C 0.022UF, Z, 800V C7318 F1AAF471A019 C 470PF , 240V C7416 F1J1C475A225 C 4.7UF, 10V...
  • Page 72 Model No. : TX-LR50B6 Parts List Ref. Change Safety Part No. Part Name & Description Q'ty Remarks C8114 F1J0G2260001 C 22 UF 4 V C8119 F1G1H471A830 C 470PF, 50V C8203 F1G1C104A077 C 0.1UF 16V C8204 F1G1C104A077 C 0.1UF 16V C8205 F1G1C104A077 C 0.1UF 16V...
  • Page 73 Model No. : TX-LR50B6 Parts List Ref. Change Safety Part No. Part Name & Description Q'ty Remarks D3007 DZ2J140M0L DIODE D3008 DZ2J140M0L DIODE D3009 DZ2J140M0L DIODE D3010 DZ2J140M0L DIODE D3011 DZ2J140M0L DIODE D3012 DZ2J140M0L DIODE D3013 DZ2J140M0L DIODE D3014 DZ2J140M0L...
  • Page 74 Model No. : TX-LR50B6 Parts List Ref. Change Safety Part No. Part Name & Description Q'ty Remarks D9806 B0FCAM000004 DIODE D9807 B0FCAM000004 DIODE D9812 DZ2J160M0L DIODE D9813 B0JCDE000006 DIODE D9814 B0JCDE000006 DIODE D9815 B0BC4R7A0507 DIODE D9816 DA2JF2300L DIODE INTEGRATED CIRCUITS...
  • Page 75 Model No. : TX-LR50B6 Parts List Ref. Change Safety Part No. Part Name & Description Q'ty Remarks L8014 J0JCC0000287 COIL L8100 G1C3R3MA0464 INDUCTOR L8101 G1C2R2ZA0311 INDUCTOR L8453 J0ZZB0000142 FILTER L9800 G0C160J00001 INDUCTOR L9801 G0C160J00001 INDUCTOR L9802 J0JKB0000034 EMI FILTER L9803...
  • Page 76 Model No. : TX-LR50B6 Parts List Ref. Change Safety Part No. Part Name & Description Q'ty Remarks R0932 D0GA220JA023 M22 OHM, J.1/16 W R0933 D0GA220JA023 M22 OHM, J.1/16 W R0936 D0GA220JA023 M22 OHM, J.1/16 W R0937 D0GA220JA023 M22 OHM, J.1/16 W...
  • Page 77 Model No. : TX-LR50B6 Parts List Ref. Change Safety Part No. Part Name & Description Q'ty Remarks R3070 D0GA103JA039 M 10KOHM,F,1/16W R3071 D0GA102JA039 M 1KOHM ,J, 1/10W R3072 D0GA102JA039 M 1KOHM ,J, 1/10W R3073 D0GA152JA023 M 1.5KOHM, J,1/16W R3074 D0GA152JA023 M 1.5KOHM, J,1/16W...
  • Page 78 Model No. : TX-LR50B6 Parts List Ref. Change Safety Part No. Part Name & Description Q'ty Remarks R4800 D0GA473JA039 M 47KOHM J. 1/10W R4801 D0GA473JA039 M 47KOHM J. 1/10W R4802 D0GBR00J0004 M 0 OHM J 1/10W R4900 D0GFR00J0005 M 0 OHM,J,1/3W...
  • Page 79 Model No. : TX-LR50B6 Parts List Ref. Change Safety Part No. Part Name & Description Q'ty Remarks R6729 D0GA681JA023 M680 OHM, J,1/16W R6734 D1BA1002A023 M 10KOHM,F,1/16W R6804 D0GA681JA023 M680 OHM, J,1/16W R6805 D0GA681JA023 M680 OHM, J,1/16W R6810 D0GA332JA023 M 3.3KOHM, J,1/16W...
  • Page 80 Model No. : TX-LR50B6 Parts List Ref. Change Safety Part No. Part Name & Description Q'ty Remarks R7317 D0GD223JA052 M 22KOHM,J,1/8W R7318 D0GB473JA065 M 47KOHM J. 1/10W R7319 D0GD473JA052 M 47KOHM,J,1/8W R7320 D0GD333JA052 M 33 KOHM,J,1/8W R7321 D0GD100JA059 M 10 OHM,J,1/4W...
  • Page 81 Model No. : TX-LR50B6 Parts List Ref. Change Safety Part No. Part Name & Description Q'ty Remarks R8243 D1HY2204A012 M 22OHM .J. 1/16W R8244 D1HY2204A012 M 22OHM .J. 1/16W R8245 D0GA220JA023 M 22OHM .J. 1/16W R8246 D0GA220JA023 M 22OHM .J. 1/16W...
  • Page 82 Model No. : TX-LR50B6 Parts List Ref. Change Safety Part No. Part Name & Description Q'ty Remarks R8886 D0GA102JA039 M 1KOHM ,J, 1/10W R8909 D0GA222JA023 M 2.2KOHM, J,1/16W R8910 D0GA103JA039 M 10KOHM,F,1/16W R8911 EXB2HV121JV M 120OHM ,J, 1W R8924 D0GA102JA039...
  • Page 83 Model No. : TX-LR50B6 Parts List Ref. Change Safety Part No. Part Name & Description Q'ty Remarks K1KY07AA0719 CONNECTOR K1MY51BA0526 CONNECTOR K1KY04BA0387 CONNECTOR CF7101 D4CAY4R7A096 THERMISTOR RESISTOR F7101 K5E502YYA162 FUSE K1KY03BA0402 CONNECTOR D0GDR00J0004 CHIP RESISTOR JA13 D0GDR00J0004 CHIP RESISTOR D0GDR00J0004...
  • Page 84 Model No. : TX-LR50B6 Parts List Ref. Change Safety Part No. Part Name & Description Q'ty Remarks Exploded View K2CQ2YY00109 AC CORD L0EYAA000026 SPEAKER UNIT L5EDDYY00474 LCD PANEL N2QAYB000815 REMOTE TRANSMITTER TBL3FB00021 STAND MTG ASSY TBL3FX00051 PEDESTAL PACKING KIT TBM4GD2211...

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