Panasonic TX-L50B6E Service Manual
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Panasonic TX-L50B6E Service Manual

Km21e chassis
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Service Manual

This service information is designed for experienced repair technicians only and is not designed for use by the general public. It does not
contain warnings or cautions to advise non-technical individuals of potencial dangers in attempting to service a product. Products
powered by electricity should be serviced or repaired only by experienced professional technicians. Any attempt to service or repair the
product or products deal within this service information by anyone else could result in serious injury or death.
There are special components used in this equipment which are important for safety. These parts are marked
Schematic Diagrams, Circuit Board Diagrams, Explorer Views and Replacement Parts List. It is essential that these
critical parts should be replaced with manufacturer´s specified parts to prevent shock, fire or other hazards. Do not
modify the original design without permission of manufacturer.
Warning
IMPORTANT SAFETY NOTICE
ORDER No. PCZ1304118CE
LCD Television
TX-L50B6E
KM21E Chassis
© Panasonic Corporation 2013.
Unauthorized copying and
distribution is a violation of law.
in the

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Summary of Contents for Panasonic TX-L50B6E

  • Page 1: Service Manual

    Schematic Diagrams, Circuit Board Diagrams, Explorer Views and Replacement Parts List. It is essential that these critical parts should be replaced with manufacturer´s specified parts to prevent shock, fire or other hazards. Do not modify the original design without permission of manufacturer. © Panasonic Corporation 2013. Unauthorized copying and distribution is a violation of law.

  • Page 2: Table Of Contents

    CONTENTS SAFETY PRECAUTIONS ........... 3 GENERAL GUIDE LINES........3 TOUCH – CURRENT CHECK....... 3 PREVENTION OF ELECTROSTATIC DISCHARGE (ESD) TO ELECTROSTATICALLY SENSITIVE (ES) DEVICES ..............4 ABOUT LEAD FREE SOLDER (PBF)......5 SUGGESTED PB FREE SOLDER......5 SERVICE NAVIGATION ..........6 CHASSIS BOARD LAYOUT........

  • Page 3: Safety Precautions

    Safety Precautions General Guide Lines 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. After servicing, see to it that all the protective devices such as insulation barriers, insulation papers shields are properly installed.

  • Page 4: Prevention Of Electrostatic Discharge (Esd) To Electrostatically Sensitive (Es) Devices

    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"...

  • Page 5: About Lead Free Solder (Pbf)

    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). That is Tin (Sn), Silver (Ag) and Copper (Cu) although other types are available.

  • Page 6: Service Navigation

    Service Navigation Chassis Board Layout LD-BOARD A-BOARD P-BOARD GK-BOARD K-BOARD Board Name Function A-Board AV Terminal, HDMI, USB, Digital Audio Out, Tuner, CI slot, Headphones, Peaks IC_sLD8, Speaker out, Flash Memory, DDR SDRAM P-Board Main Input, Power Supply K-Board Remote Receiver, Power and Timer LED, C.A.T.S GK-Board Key control, Power switch LD-Board...

  • Page 7: Service Hints

    Service Hints How to remove the backcover Remove the 31 fixing screws and the backcover. (see Fig.5) SCREWS (1) THTD030J /17pcs/ (2) XTV3+8GFJK /9pcs/ (3) XYN4+F12FNK /4pcs/ (4) THEC1509 /1pcs/ Fig.5 How to remove the pedestal assembly. Lay the main unit face down. (see Fig.6) Fig.6 Remove the 4 fixing screws and the pedestal assembly.

  • Page 8: Applicable Signals

    Applicable Signals Component (Y, Pb, Pr) (from AV2 terminal), HDMI Signal name COMPONENT HDMI 525 (480) / 60i,60p 625 (576) / 50i, 50p 750 (720) / 60p, 50p 1,125 (1,080) / 60i, 50i 1,125 (1,080) / 60p 1,125 (1,080) / 50p 1,125 (1,080) / 24p PC (from HDMI terminal) Applicable input signal for PC is basically compatible to HDMI standard timing.

  • Page 9: Specifications

    Specifications 220-240V AC, 50 / 60Hz Power Source: 136W Rated Power Consumption: Stand-by Power Consumption: 0.20W 75 unbalanced, Coaxial Type Aerial Impedance: DVB-T Digital terrestrial services ( Receiving System: MPEG2 and MPEG4-AVC(H.264) DVB-C Digital cable services ( MPEG2 and MPEG4-AVC(H.264) PAL I/H, B/G, SECAM B/G, L/L’...
  • Page 10 Remote Control Accessories supplied : 2 x R6 (UM3) Batteries Dimensions: Width: Height: Depth: Including TV stand 1,139mm 739mm 275mm TV set only 1,139mm 674mm 89mm Mass: Including TV stand 18.0kg TV set only 15.0kg Design and Specifications are subject to change without notice. Mass and dimensions shown are approximate. This equipment complies with the EMC standards listed below: EN55013, EN61000-3-2, EN61000-3-3, EN55020, EN55022, EN55024...

  • Page 11: Technical Description

    How to SELF CHECK: While pressing [VOLUME ( - )] button on the main unit, press the MENU button on the remote control for more than 3 seconds. TV will be forced to the factory shipment setting after this SELF CHECK. Model and Keys: Keys Model No. CI PLUS TX-L50B6E...

  • Page 12: Setting Inspection

    Setting Inspection Voltage Confirmation A board Description Test point Voltage PANEL12V TP4097 12.1V ± 0.8V SUB3.3V TP5400 3.32V ± 0.165V SUB1.1V TP8101 1.14V ± 0.07V SUB 1.5 V TP8100 1.52V ± 0.05V SUB5V TP5420 5.0V ± 0.25V HDMI3.3V TP8000 3.3V ± 0.16V P board Description Test point...

  • Page 13: Service Mode Function

    Service Mode Function MPU controls the functions switching for each IICs through IIC bus in this chassis. The following setting and adjustment can be adjusted by remote control in Service Menu How to enter into Service Mode While pressing [VOLUME ( - )] button on the main unit, press the [RED] button on the remote control for 3 times within 2 seconds.

  • Page 14: Service

    SERVICE SERVICE Peaks SOFT 3.002 OPTION 1 04 Key Command ADJUST Peaks EEP 01.01.0033 OPTION 2 ee S e r v i c e 1 WB-ADJ LSI PACKAGE 1.918 OPTION 3 01 OPTION LSI DATA 0.01.09 OPTION 4 10  Press the 3/4 button to change the adjustment values or function.

  • Page 15: Service Tool Mode

    Service Tool Mode How to access Select [SRV-TOOL] in Service Mode. Press [OK] button on the remote control. SRV-TOOL Display of TD2Microcode version TD2Microcode:005a0910 Flash ROOM: AD – F1 Display of Flash ROM maker code POWER ON TIME/COUNT PTCT:00.00.00.00.00 Time 00051:30 On/Off 0000042 Display of SOS History Press [MUTE] button (3sec)

  • Page 16: Hotel Mode

    Hotel Mode 1. Purpose Restrict a function for hotels. 2. Access command to the Hotel mode setup menu. In order to display the Hotel mode setup menu, please enter the following command (within 2 second). [TV] : Vol.[Down] + [REMOTE] : AV (3 times) Then, the Hotel mode setup menu is displayed.

  • Page 17: Data Copy By Usb Memory

    Data Copy by USB Memory Purpose a) Board replacement (Copy the data when exchanging A-board): When exchanging A-board, the data in original A-board can be copied to USB Memory and then copy to new A-board. Following data can be copied. (Before exchanging) User setting data Copy to USB Memory...

  • Page 18: Data Copy From Tv Set To Usb Memory

    Data Copy from TV set to USB Memory Turn on the TV set. Insert USB Memory with a startup file (pwd file) to USB Terminal. On-screen Display will be appeared according to the startup file automatically. Input a following password for (a) or (b) by using remote control. (a) For Board replacement: 2770 (b) For Hotel: 4850 Data will be copied from TV set to USB Memory.

  • Page 19: Data Copy From Usb Memory To Tv Set

    Data Copy from USB Memory to TV set Turn on the TV set. Insert USB Memory with Data to USB Terminal. On-screen Display will be appeared according to the Data folder automatically. Input a following password for (a) or (b) by using remote control. (a) For Board replacement: 2771 (b) For Hotel: 4851 Data will be copied from USB Memory to TV set.

  • Page 20: Option Bytes Description

    Option Bytes Description OPTION1 TEXT Ch Refresh ON (1) / OFF (0) ID-1 ON (1) / OFF (0) Macrovision Auto-judge ON (1) / OFF (0) “BassBoost” sound menu enable ON (1) / OFF (0) “Digital Remaster” sound menu enable ON (1) / OFF (0) Enable HDMI force reset ON (1) / OFF (0) TINT_Component_HDMI...

  • Page 21: Self Check

    While pressing [VOLUME ( - )] button on the main unit, press [MENU] button on the remote control for more than 3 seconds. How to exit Switch off the power with the [POWER] button on the main unit. TX-L50B6E 50FHD Self Check Complete H14TUN O.K.

  • Page 22: Power Led Blinking Timing Chart

    Power LED blinking timing chart Subject Information of LED Flashing timing chart. Contents When abnormality has occurred the unit, the protection circuit operates and reset to the stand by mode. At this time, the defective block can be identified by number of blinking of the Power LED on the front panel of the unit. Blinking Blinking timing Contents...

  • Page 23: Adjustment Method

    Adjustment Method White Balance Adjustment Instrument Name Connect to Remarks Remote controller Correlation can be also taken by LCD WB meter (Minolta CA-210 or equivalent) CS-1000A or equivalent Comunication jig Computer for external control Procedure Remarks Let the panel standfor more than 3 hours at more than 20 C.

  • Page 24: Wiring Diagram

    Wiring Diagram LCD PANEL...

  • Page 25: Block Diagram (1 Of 2)

    SP_L SP_R Block Diagram (1/2) CI SLOT SERVICE JK8400 CN0100 17,18 51,52 A-BOARD IIC_0 IIC_1 STM IIC STM-SQ SBO/I SDBOOT 10,11 14,15 26,27 30,31 RED_LED SOUND18V IC4900 9,16,25,32 TU_1.8V SUB3.3V [C1AB00003984] SUB3.3V AUDIO AMP DMD IIC_0 IC8900 SDA/SCL NAND FLASH FE_XRST FE_XRST IC8200...
  • Page 26 Block Diagram (2/2) TO GK4 TO A02 TO PANEL K-BOARD P-BOARD TO A10 TO P4 GK-BOARD SW2857 SW2853 SW2852 SW2851 SW2855 SW2854 Q7201 TO PANEL LD-BOARD Q7202 D7105 D7104 MAIN INPUT TO P4 JK7101...

  • Page 27: Parts Location

    Parts Location TMK0EA167 TMK0EA353 TMK0EA368 TMK0EA352 TMK0EG104...
  • Page 28 Parts Location...

  • Page 29: Location Of Lead Wiring

    Location of Lead Wiring SP_R SP_L...

  • Page 30: Replacement Parts List Note

    Replacement Parts List Note All parts except parts mentioned [PAVCCZ] in the Remarks column are supplied by AVC-CSPC. Note: Parts mentioned [PAVCCZ] are supplied by PAVCCZ. Notice: Be sure to make your orders of replacement parts according to this list. RTL (Retention Time Limited) Note: The marking (RTL) indicates that the Retention Time is Limited for this item.

  • Page 31: Replacement Parts List

    Model No. : TX-L50B6E Parts List Ref. Change Safety Part No. Part Name & Description Q'ty Remarks A-L50B6E CIRCUIT BOARD A 1 (RTL)PAVCCZ TXN/K1WQUJ CIRCUIT BOARD K 1 (RTL)PAVCCZ TXN/P1ZPUE CIRCUIT BOARD P 1 (RTL)PAVCCZ TXNGK1SRUA CIRCUIT BOARD GK 1 (RTL)PAVCCZ...
  • Page 32 Model No. : TX-L50B6E Parts List Ref. Change Safety Part No. Part Name & Description Q'ty Remarks C3176 F1J1A106A043 C 10UF, , 10V 1 PAVCCZ C3177 F1G1C104A077 C 100NF, , 16V 1 PAVCCZ C3178 F1G1H1020008 C 1NF, , 50V 1 PAVCCZ...
  • Page 33 Model No. : TX-L50B6E Parts List Ref. Change Safety Part No. Part Name & Description Q'ty Remarks C5439 F1K1V106A010 C 10UF, , 35V 1 PAVCCZ C5441 F1G1C183A146 C 18NF, , 16V 1 PAVCCZ C5443 F1G1H472A830 C 4700PF, -, 50V 1 PAVCCZ...
  • Page 34 Model No. : TX-L50B6E Parts List Ref. Change Safety Part No. Part Name & Description Q'ty Remarks C7432 F1J1C475A225 C 4700NF, , 16V 1 PAVCCZ C7433 F1K1E106A134 C 10UF, , 25V 1 PAVCCZ C7434 F1J1C475A225 C 4700NF, , 16V 1 PAVCCZ...
  • Page 35 Model No. : TX-L50B6E Parts List Ref. Change Safety Part No. Part Name & Description Q'ty Remarks C8220 F1G1C104A077 C 100NF, , 16V 1 PAVCCZ C8221 F1G1C104A077 C 100NF, , 16V 1 PAVCCZ C8224 F1G1C104A077 C 100NF, , 16V 1 PAVCCZ...
  • Page 36 Model No. : TX-L50B6E Parts List Ref. Change Safety Part No. Part Name & Description Q'ty Remarks D3022 DZ2J140M0L DIODE 1 PAVCCZ D3023 DZ2J140M0L DIODE 1 PAVCCZ D3024 DZ2J140M0L DIODE 1 PAVCCZ D3025 DZ2J140M0L DIODE 1 PAVCCZ D3026 DZ2J140M0L DIODE...
  • Page 37 Model No. : TX-L50B6E Parts List Ref. Change Safety Part No. Part Name & Description Q'ty Remarks K1KY03BA0402 3P CONNECTOR 1 PAVCCZ IC3052 C0ABBB000179 IC DUAL OPERATIONAL AMPLIFIER 1 PAVCCZ IC4900 C1AB00003984 IC DIG AUDIO POWER AMPLIFIER 1 PAVCCZ IC5000 AN34043AAVF...
  • Page 38 Model No. : TX-L50B6E Parts List Ref. Change Safety Part No. Part Name & Description Q'ty Remarks L5400 G1C4R7ZA0311 COIL 1 PAVCCZ L5420 G1C6R8MA0533 COIL 1 PAVCCZ L5421 G1C220MA0445 COIL 1 PAVCCZ L6704 J0JYC0000464 FILTER 1 PAVCCZ L6706 J0JYC0000464 FILTER...
  • Page 39 Model No. : TX-L50B6E Parts List Ref. Change Safety Part No. Part Name & Description Q'ty Remarks Q7401 B1ABCF000231 TRANSISTOR 1 PAVCCZ Q7402 B1CHRE000015 TRANSISTOR 1 PAVCCZ Q7403 B1CHRE000015 TRANSISTOR 1 PAVCCZ Q7405 B1CHRE000015 TRANSISTOR 1 PAVCCZ Q7407 B1CBGD000001 TRANSISTOR...
  • Page 40 Model No. : TX-L50B6E Parts List Ref. Change Safety Part No. Part Name & Description Q'ty Remarks R2803 D0GAR00J0005 M 0 OHM, J, 1/16W 1 PAVCCZ R2820 D0GA470JA023 M 47 OHM, J, 1/16W 1 PAVCCZ R2821 D0GAR00J0005 M 0 OHM, J, 1/16W...
  • Page 41 Model No. : TX-L50B6E Parts List Ref. Change Safety Part No. Part Name & Description Q'ty Remarks R3316 D0GA473JA039 M 47K OHM, J, 1/16W 1 PAVCCZ R3324 D0GA103JA039 M 10K OHM, J, 1/16W 1 PAVCCZ R3326 D0GA222JA023 M 2K2 OHM, J, 1/16W...
  • Page 42 Model No. : TX-L50B6E Parts List Ref. Change Safety Part No. Part Name & Description Q'ty Remarks R5102 D0GA473JA039 M 47K OHM, J, 1/16W 1 PAVCCZ R5104 D0GA103JA039 M 10K OHM, J, 1/16W 1 PAVCCZ R5152 D0GA222JA023 M 2K2 OHM, J, 1/16W...
  • Page 43 Model No. : TX-L50B6E Parts List Ref. Change Safety Part No. Part Name & Description Q'ty Remarks R7303 D0GD101JA059 M 100 OHM, J, 1/4W 1 PAVCCZ R7304 D0AF2R2JA112 C 2R2 OHM, J, 1/2W 1 PAVCCZ R7305 D0AF161JA112 C 160 OHM, J, 1/2W...
  • Page 44 Model No. : TX-L50B6E Parts List Ref. Change Safety Part No. Part Name & Description Q'ty Remarks R8230 D1BA2700A023 M 270 OHM, F, 1/16W 1 PAVCCZ R8231 D1BA2700A023 M 270 OHM, F, 1/16W 1 PAVCCZ R8232 D1BA2700A023 M 270 OHM, F, 1/16W...
  • Page 45 Model No. : TX-L50B6E Parts List Ref. Change Safety Part No. Part Name & Description Q'ty Remarks R8830 D0GA103JA039 M 10K OHM, J, 1/16W 1 PAVCCZ R8850 D0GA331JA023 M 330 OHM, J, 1/16W 1 PAVCCZ R8851 D1BB7151A106 M 7K15 OHM, F, 1/10W...
  • Page 46 Model No. : TX-L50B6E Parts List Ref. Change Safety Part No. Part Name & Description Q'ty Remarks R9851 D0GD473JA052 M 47K OHM, J, 1/8W 1 PAVCCZ R9852 D0GDR00J0004 M 0 OHM, J, 1/8W 1 PAVCCZ R9853 D0GDR00J0004 M 0 OHM, J, 1/8W...
  • Page 47 Model No. : TX-L50B6E Parts List Ref. Change Safety Part No. Part Name & Description Q'ty Remarks BAT-C-0815 BATTERY COVER OF RC 1 PAVCCZ K2CQ2YY00107 AC CORD 1 PAVCCZ L0EYAA000026 SPEAKER 1 PAVCCZ L0EYAA000026 SPEAKER 1 PAVCCZ L5EDDYY00474 LCD PANEL...
  • Page 48 Model No. : TX-L50B6E Parts List Ref. Change Safety Part No. Part Name & Description Q'ty Remarks TQB0E2376Z-1 INSTRUCTION BOOK (ESTONIAN) 1 PAVCCZ TQF0EA460 ENERGY LABEL 1 PAVCCZ TUC4GJ5055 HEATSINK 1 PAVCCZ TUC4GJ5058 HEATSINK 2 PAVCCZ TUC4GJ5074 HEATSINK 2 PAVCCZ...
  • Page 49 Model No. : TX-L50B6E Parts List Ref. Change Safety Part No. Part Name & Description Q'ty Remarks SK217 THTD030J SCREW 1 PAVCCZ SK218 THTD030J SCREW 1 PAVCCZ SK219 XTV3+8GFJK SCREW 1 PAVCCZ SK220 XTV3+8GFJK SCREW 1 PAVCCZ SK221 XTV3+8GFJK SCREW...

  • Page 50: Schematic Diagrams Note

    Schematic Diagrams Note IMPORTANT SAFETY NOTICE Components identified by mark have special characteristics important for safety. When replacing any of these components, use only manufacturers' specified parts. NOTE RESISTOR All resistors are carbon ¼W resistor, unless marked otherwise. Unit of resistance is OHM () (k=1,000, M=1,000,000) CAPACITORS All capacitors are ceramic 50V unless marked otherwise.

  • Page 69: Conductor Views

    Conductor Views A-BOARD - TOP A 1 6 A 0 2 S U F F I X . VJ5422 R1953 C2039 C5439 JS008 JS007 C4001 IC5421 JS010 JS009 JS012 JS011 C5437 TNP4G548 C4000 JS043 JS042 JS045 JS044 JS020 JS019 C4002 VJ5401 JS022 JS021...
  • Page 70 A-BOARD - BOTTOM D5201 C1958 I C 5 4 2 1 C2017 R2062 TP2009 R5200 TP5200 C2009 C2027 D2017 C5444 R2051 TP4098 D2016 R2040 R5432 T-PAD IC5421 C2025 TP4097 R2064 C5443 R8851 TP4096 C5442 R8852 C8850 R4080 R4081 L4900 C4929 C5440 R5429 R4900...
  • Page 71 P-BOARD - TOP J108 ZA7104 J209 J308 JS7304 L7303 D7405 J207 JS7400 J110 Q7402 J203 J107 Q7401 IC7503 L7401 Q7407 C7428 Q7501 J109 D7502 Q7406 J105 R7425 D7401 J204 D7404 L7502 IC7401 J213 J114 J214 PA7401 C7419 D7411 R7407 Q7409 J111 D7402 C7418...
  • Page 72 P-BOARD - BOTTOM J108 ZA7104 J209 J308 JS7304 L7303 D7405 J207 JS7400 J110 R7411 R7505 Q7402 C7434 R7508 R7409 C7521 C7520 C7416 R7404 J203 C7524 R7506 R7507 CL7408 C7525 J107 C7429 Q7401 C7529 IC7503 L7401 Q7407 R7403 C7433 JA20 R7422 C7428 Q7501 J109...
  • Page 73 LD-BOARD - TOP J 1 9 J S 9 8 0 7 Z A 9 8 0 2 L 9 8 0 7 C 9 8 1 6 J 2 5 1 L 9 8 0 2 J 2 0 J251 J 1 4 J S 9 8 0 4...
  • Page 74 K-BOARD - TOP D2802A R2822 R2821 SN2800 D2802 D2807 D2801 D2800 C2801 D2804 D2806 C2802 O U T D2808 C2807 C2804 C2803 V C C C2805 C2806 R2820 S U F F I X . S U F F I X . R2803 C2800 R2813...
  • Page 75 GK-BOARD - TOP GK-BOARD - BOTTOM CL2853 CL2852 CL2851 5 5 8 2 L C 6 5 8 2 L C...

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