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Panasonic TH-L50B6M Service Manual
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Panasonic TH-L50B6M 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 ------------------------------------------------------ 9
5.1. How to enter into Service Modes ---------------------- 9
5.1.1. Contents of adjustment mode --------------------- 9
5.1.2. How to exit---------------------------------------------- 9
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
TH-L50B6M
Model No.
Chassis:
KM22
Destination:
MIDDLE EAST
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 ------------------------------------------------- 17
7.6. Side Metal Bracket--------------------------------------- 18
7.7. Metal Bracket 1 ------------------------------------------- 19
7.8. Metal Bracket 2 ------------------------------------------- 20
7.9. Metal Bracket Bottom ---------------------------------- 21
7.10. PCB Installation ------------------------------------------ 22
7.11. Pedestal Ass'y 1------------------------------------------ 23
ORDER NO. MTV1301102CE
LED TV
PAGE
© Panasonic Corporation 2013.

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  • Page 1: Table Of Contents

    5.1.3. Display of SOS History ------------------------------ 9 7.8. Metal Bracket 2 ------------------------------------------- 20 5.1.4. POWER ON TIME/COUNT ------------------------ 9 7.9. Metal Bracket Bottom ---------------------------------- 21 5.1.5. Exit-------------------------------------------------------- 9 7.10. PCB Installation ------------------------------------------ 22 5.1.6. Self Check Mode-------------------------------------10 7.11. Pedestal Ass’y 1------------------------------------------ 23 © Panasonic Corporation 2013.
  • Page 2 TH-L50B6M 7.12. Pedestal Ass’y 2------------------------------------------ 24 7.13. Stand MTG Assy ----------------------------------------- 25 7.14. Back Cover Installation --------------------------------- 26 7.15. Handling SPEC ------------------------------------------- 27 8 Measurements and Adjustments -------------------------- 28 8.1. Voltage chart of A-board-------------------------------- 28 8.2. Voltage chart of P-board-------------------------------- 28 9 Block Diagram --------------------------------------------------- 29 9.1.

  • Page 3: Safety Precautions

    TH-L50B6M 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

    TH-L50B6M 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)

    TH-L50B6M 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

    TH-L50B6M 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

    TH-L50B6M 4 Specifications Power Source AC Auto 110 - 240 V, 50/60 Hz Power consumption Power rating 136 W Standby Condition 0.2 W Display Panel Panel TFT LCD Module with LED Backlight Visible screen size (diagonal) 126 cm (50 inches) 2,073,600 (1,920 (W) ...
  • Page 8 TH-L50B6M TYPE A Connectors  2 HDMI AV IN USB 2.0 TYPE A Connectors  1 DC 5 V, Max. 500 mA Note • Design and Specifications are subject to change without notice. Mass and Dimensions shown are approximate.

  • Page 9: Service Mode

    TH-L50B6M 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 10: Self Check Mode

    TH-L50B6M 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

    TH-L50B6M 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

    TH-L50B6M 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

    TH-L50B6M 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

    TH-L50B6M 7.2. LCD Panel Assembly Install LCD panel to cabinet. Description LCD PANEL...

  • Page 15: Lcd Panel Fixing & Handling Method

    TH-L50B6M 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

    TH-L50B6M 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. Description LED PANEL...

  • Page 17: Vesa Metal

    TH-L50B6M 7.5. Vesa Metal 1. Fix Vesa Metal & screw. 2. Stick felt at all Vesa Metal - 4 pcs. Part No Description Remarks TKZ5ZX50531 VESA METAL 23  23  0.55t (8mm hole) TMK4GA333 FELT 20  24  0.35t...

  • Page 18: Side Metal Bracket

    TH-L50B6M 7.6. Side Metal Bracket Description METAL_BRACKET-SIDE (L/R)

  • Page 19: Metal Bracket 1

    TH-L50B6M 7.7. Metal Bracket 1 Description METAL LED DRIVER METAL VERTICAL L METAL VERTICAL R METAL MTG A BOARD...

  • Page 20: Metal Bracket

    TH-L50B6M 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 21: Metal Bracket Bottom

    TH-L50B6M 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 22: Pcb Installation

    TH-L50B6M 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 (P10/A4/DRIVER4/VESA4) 6 ±1 kgf.cm SCREW (SP4) 8 ±1 kgf.cm CHASSIS BRACKET (A-BOARD) CHASSIS BRACKET (LED)

  • Page 23: Pedestal Ass'y

    TH-L50B6M 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 24: Pedestal Ass'y

    TH-L50B6M 7.12. Pedestal Ass’y 2 Fix Rubber foot 6 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 25: Stand Mtg Assy

    TH-L50B6M 7.13. Stand MTG Assy 1. Insert stand metal in plastic bag. 2. Insert screw in plastic bag (2 type). 3. Fold plactic bag and stick paper tape. 4. Stick barcode label at plastic bag. Part No Description TQF4GA267 QR CODE LABEL...

  • Page 26: Back Cover Installation

    TH-L50B6M 7.14. Back Cover Installation 1. Install Back Cover. 2. Fix screws. Description Remarks BACK COVER SCREW (B7) 6 ± 1 kgf.cm SCREW (TERMINAL5/L2/CTRL2) 6 ± 1 kgf.cm SCREW(BC17) 11 ± 2 kgf.cm SCREW (BC17) 9 ± 1 kgf.cm...

  • Page 27: Handling Spec

    TH-L50B6M 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 28: Measurements And Adjustments

    TH-L50B6M 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 (V) Remark SUB1.8V TP8705 1.74 - 1.90 SUB1.2V...

  • Page 29: Block Diagram

    TH-L50B6M 9 Block Diagram 9.1. Main Block Diagram PANEL 32” 5W x 2 / Audio AMP 39” 10W x 2 I2S AMP HD/FHD YAMAHA LVDS HD : (DATA 4pairs / CLK 1pair) single8bit FHD: (DATA 4pairs / CLK 1pair) dual8bit Sub3.3V...

  • Page 30: Wiring Connection Diagram

    TH-L50B6M 10 Wiring Connection Diagram 10.1. Wire Dressing 1 Do wire dressing follow below spec. Part No Description Remarks 0.07  8 T4FP1505J PET TAPE (GREY W=15mm) 0.49 0.10  3 T4FP1505J PET TAPE (GREY W=15mm) TSCKF0280001 LVDS CABLE...

  • Page 31: Wire Dressing

    TH-L50B6M 10.2. Wire Dressing 2 Stick sponge at LVDS cable. Description SPONGE SPONGE LVDS CABLE...

  • Page 32: Schematic Diagram

    TH-L50B6M 11 Schematic Diagram Model No. : TH-L50B6M A-Board (1/10)
  • Page 33 Model No. : TH-L50B6M A-Board (2/10-1)
  • Page 34 Model No. : TH-L50B6M A-Board (2/10-2)
  • Page 35 Model No. : TH-L50B6M A-Board (3/10)
  • Page 36 Model No. : TH-L50B6M A-Board (4/10)
  • Page 37 Model No. : TH-L50B6M A-Board (5/10)
  • Page 38 Model No. : TH-L50B6M A-Board (6/10)
  • Page 39 Model No. : TH-L50B6M A-Board (7/10)
  • Page 40 Model No. : TH-L50B6M A-Board (8/10)
  • Page 41 Model No. : TH-L50B6M A-Board (9/10)
  • Page 42 Model No. : TH-L50B6M A-Board (10/10)
  • Page 43 Model No. : TH-L50B6M GK-Board...
  • Page 44 Model No. : TH-L50B6M K-Board...
  • Page 45 Model No. : TH-L50B6M LD-Board...
  • Page 46 Model No. : TH-L50B6M P-Board (1/2)
  • Page 47 Model No. : TH-L50B6M P-Board (2/2)

  • Page 48: Printed Circuit Board

    TH-L50B6M 12 Printed Circuit Board Model No. : TH-L50B6M A-Board (Top Component Side)
  • Page 49 Model No. : TH-L50B6M A-Board (Bottom Component Side)
  • Page 50 Model No. : TH-L50B6M GK-Board...
  • Page 51 Model No. : TH-L50B6M K-Board...
  • Page 52 Model No. : TH-L50B6M LD-Board...
  • Page 53 Model No. : TH-L50B6M P-Board (Top Component Side)
  • Page 54 Model No. : TH-L50B6M P-Board (Bottom Component Side)

  • Page 55: Exploded View And Replacement Parts List

    TH-L50B6M 13 Exploded View and Replacement Parts List Model No. : TH-L50B6M Parts Location...
  • Page 56 Model No. : TH-L50B6M Packing Exploded View 1...
  • Page 57 Model No. : TH-L50B6M Packing Exploded View 2...
  • Page 58 Model No. : TH-L50B6M Parts List Ref. Change Safety Part No. Part Name & Description Q'ty Remarks CAPACITORS C2000 F1H1E104A161 C 0.1UF, 25V C2001 F1G1E103A059 C 0.01UF 25V C2002 F1H1E104A161 C 0.1UF, 25V C2003 F1G1H1020008 C 1000PF 50V C2004 F1H1E104A161 C 0.1UF, 25V...
  • Page 59 Model No. : TH-L50B6M Parts List Ref. Change Safety Part No. Part Name & Description Q'ty Remarks C4719 F1G1C104A077 C 0.1UF 16V C4721 F1G1C104A077 C 0.1UF 16V C4829 F1J1A106A043 C 10UF, 10V C4834 F1G1C104A077 C 0.1UF 16V C4835 F1G1C104A077 C 0.1UF 16V...
  • Page 60 Model No. : TH-L50B6M Parts List Ref. Change Safety Part No. Part Name & Description Q'ty Remarks C6751 F1G1H471A834 C 470PF, 50V C6752 F1G1H101A834 C 100PF 50V C6753 F1G1C470A160 C 47PF, 16V C6754 F1G1C470A160 C 47PF, 16V C6757 F1G1H101A834 C 100PF 50V...
  • Page 61 Model No. : TH-L50B6M Parts List Ref. Change Safety Part No. Part Name & Description Q'ty Remarks C7430 F2A1V6810043 C 680UF, 35V C7432 F1J1C475A225 C 4.7UF, 10V C7433 F1K1E106A134 C 10UF, 25V C7434 F1J1C475A225 C 4.7UF, 10V C7517 F1K1V106A010 C 10UF, 25V...
  • Page 62 Model No. : TH-L50B6M Parts List Ref. Change Safety Part No. Part Name & Description Q'ty Remarks C8117 F1G1C104A077 C 0.1UF 16V C8127 F1G1C104A077 C 0.1UF 16V C8140 F1G1H6R00009 C 6.0PF, , 50V C8142 F1G1H7R0A833 C 7 PF, 50V C8213 F1G1C104A077 C 0.1UF 16V...
  • Page 63 Model No. : TH-L50B6M Parts List Ref. Change Safety Part No. Part Name & Description Q'ty Remarks C9820 F1J2E1020002 C 1000PF, 250V C9822 F1J2E1020002 C 1000PF, 250V C9826 F2A1V6810043 C 680UF, 35V DIODES D0901 EZJZ0V120JA VARISTOR D0902 EZJZ0V120JA VARISTOR D0906...
  • Page 64 Model No. : TH-L50B6M Parts List Ref. Change Safety Part No. Part Name & Description Q'ty Remarks D7408 B0JDSG000010 DIODE D7409 B0JDSG000010 DIODE D7411 DA2J10100L DIODE D7502 DB2J41100L DIODE D9800 B0ECKM000038 DIODE D9801 B0ECKM000038 DIODE D9802 B0ADCK000001 DIODE D9805 DA2JF2300L...
  • Page 65 Model No. : TH-L50B6M Parts List Ref. Change Safety Part No. Part Name & Description Q'ty Remarks L6763 G1CR27JA0097 COIL L6765 G1C82NJ00010 COIL L6772 G1CR27JA0097 COIL L6773 G1CR27JA0097 COIL L6774 G1CR27JA0097 COIL L6776 G1CR27JA0097 COIL L6777 G1CR22JA0097 COIL L6778 G1CR22JA0097...
  • Page 66 Model No. : TH-L50B6M Parts List Ref. Change Safety Part No. Part Name & Description Q'ty Remarks Q9806 B1ABGJ000007 TRANSISTOR Q9807 B1ABBE000003 TRANSISTOR Q9808 B1ABBE000003 TRANSISTOR Q9809 B1ABPF000011 TRANSISTOR Q9810 B1ABPF000011 TRANSISTOR RESISTORS R0900 D0GA272JA023 M 2.7KOHM, J.1/16W R0901 D0GA272JA023 M 2.7KOHM, J.1/16W...
  • Page 67 Model No. : TH-L50B6M Parts List Ref. Change Safety Part No. Part Name & Description Q'ty Remarks R3063 D0GA103JA039 M 10KOHM,F,1/16W R3064 D0GA103JA039 M 10KOHM,F,1/16W R3091 D1BA4532A023 M 45.3 KOHM,F,1/16W R3092 D1BA4532A023 M 45.3 KOHM,F,1/16W R3093 D0GA154JA023 M 150KOHM J 1/16W...
  • Page 68 Model No. : TH-L50B6M Parts List Ref. Change Safety Part No. Part Name & Description Q'ty Remarks R4851 D0GA333JA023 M 33KOHM,J,1/16W R4852 D0GA102JA039 M 1KOHM, J , 1/16W R4870 D0GA102JA039 M 1KOHM, J , 1/16W R4886 D0GA103JA039 M 10KOHM,F,1/16W R4887...
  • Page 69 Model No. : TH-L50B6M Parts List Ref. Change Safety Part No. Part Name & Description Q'ty Remarks R7205 D0GD470JA052 M 47 OHM,J,1/8W R7206 D0GD4R7JA059 M 4.7 OHM,J,1/4W R7207 D0GB104JA065 M 100KOHM J 1/10W R7208 ERX1SJR22V M 0.22 OHM ,J, 1/4W...
  • Page 70 Model No. : TH-L50B6M Parts List Ref. Change Safety Part No. Part Name & Description Q'ty Remarks R7419 D0GD103JA052 M 10KOHM,J,1/8W R7420 D0GD473JA052 M 47KOHM,J,1/8W R7421 D0GD124JA052 M 120KOHM,J,1/8W R7422 D0GD224JA052 M 220KOHM,J,1/8W R7423 D0GD334JA052 M 330KOHM,J,1/8W R7505 D0GD473JA052 M 47KOHM,J,1/8W...
  • Page 71 Model No. : TH-L50B6M Parts List Ref. Change Safety Part No. Part Name & Description Q'ty Remarks R8735 D0GBR00J0004 M 0 OHM J 1/10W R9800 D0GD101JA059 M 100 OHM,J,1/4W R9801 D0GD222JA052 M 2.2KOHM,J,1/8W R9802 D0GD103JA052 M 10KOHM,J,1/8W R9803 D0GD221JA052 M 220 OHM,J 1/8W...
  • Page 72 Model No. : TH-L50B6M Parts List Ref. Change Safety Part No. Part Name & Description Q'ty Remarks FL4000 EXC28CE201U CHOKE COIL FL4001 EXC28CE201U CHOKE COIL FL4201 EXC28CE201U CHOKE COIL FL4202 EXC28CE201U CHOKE COIL FL4203 EXC28CE201U CHOKE COIL K1KY03BA0402 CONNECTOR D0GDR00J0004...
  • Page 73 Model No. : TH-L50B6M Parts List Ref. Change Safety Part No. Part Name & Description Q'ty Remarks Exploded View K2CT2YY00091 AC CORD L0EYAA000026 SPEAKER UNIT L5EDDYY00474 LCD PANEL N2QAYB000823 REMOTE TRANSMITTER TBL5ZX06661 PEDESTAL ASSY TBL5ZX06671 STAND MTG ASSY TBM4GD0911 MODEL NAME PLATE...

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