Panasonic TH-L50B6A Service Manual
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Panasonic TH-L50B6A 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 ------------------------------------------------- 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. MTV1301098CE
TH-L50B6A
KM21
AUSTRALIA
© Panasonic Corporation 2013.
LED TV
PAGE

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Summary of Contents for Panasonic TH-L50B6A

  • 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 7.10. PCB Installation ------------------------------------------ 22 5.1.5. Exit-------------------------------------------------------- 9 5.1.6. Self Check Mode-------------------------------------10 7.11. Pedestal Ass’y 1------------------------------------------ 23 © Panasonic Corporation 2013.
  • Page 2 TH-L50B6A 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-L50B6A 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-L50B6A 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-L50B6A 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-L50B6A 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-L50B6A 4 Specifications Power Rating AC 220 - 240 V, 50/60 Hz 0.76 A Normal (Home) mode 74 W Standby power consumption 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: Service Mode

    TH-L50B6A 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

    TH-L50B6A 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

    TH-L50B6A 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-L50B6A 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-L50B6A 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-L50B6A 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-L50B6A 7.2. LCD Panel Assembly Install LCD panel to cabinet. Description LCD PANEL...

  • Page 15: Lcd Panel Fixing & Handling Method

    TH-L50B6A 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-L50B6A 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-L50B6A 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-L50B6A 7.6. Side Metal Bracket Description METAL_BRACKET-SIDE (L/R)

  • Page 19: Metal Bracket

    TH-L50B6A 7.7. Metal Bracket 1 Description METAL LED DRIVER METAL VERTICAL L METAL VERTICAL R METAL MTG A BOARD...

  • Page 20: Metal Bracket

    TH-L50B6A 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-L50B6A 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-L50B6A 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-L50B6A 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-L50B6A 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-L50B6A 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-L50B6A 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-L50B6A 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-L50B6A 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 29: Block Diagram

    TH-L50B6A 9 Block Diagram 9.1. Main Block Diagram XERWE0 XERWE0 STB5/5VS S12/S5 CPU BUS AAR/DATA XECS1 CTRL ERXW S5/ S3.3 (SD-Data-VCC) BOOTSWAP S9 REG S9-REG Analog XRST 3.3/1.8 ASIC XRSTSTM UHS-1 < (SDVOLC) AN34043A Only DTMB models(HK) Support STB3.3V/1.2V_REG ED[7:0] <...

  • Page 30: Wiring Connection Diagram

    TH-L50B6A 10 Wiring Connection Diagram 10.1. Wire Dressing 1 Do wire dressing follow below spec. Description Remarks 0.07  8 PET TAPE (GREY W=15mm) 0.55 0.10  2 PET TAPE (GREY W=15mm) LVDS CABLE...

  • Page 31: Wire Dressing

    TH-L50B6A 10.2. Wire Dressing 2 Stick sponge at LVDS cable. Description SPONGE SPONGE LVDS CABLE...

  • Page 32: Schematic Diagram

    TH-L50B6A 11 Schematic Diagram Model No. : TH-L50B6A A-Board (1/18)
  • Page 33 Model No. : TH-L50B6A A-Board (2/18-1)

  • Page 34: Exploded View And Mechanical Replacement Parts List

    Model No. : TH-L50B6A A-Board (2/18-2)
  • Page 35 Model No. : TH-L50B6A A-Board (3/18)
  • Page 36 Model No. : TH-L50B6A A-Board (4/18)
  • Page 37 Model No. : TH-L50B6A A-Board (5/18)
  • Page 38 Model No. : TH-L50B6A A-Board (6/18)
  • Page 39 Model No. : TH-L50B6A A-Board (7/18-1)
  • Page 40 Model No. : TH-L50B6A A-Board (7/18-2)
  • Page 41 Model No. : TH-L50B6A A-Board (8/18)
  • Page 42 Model No. : TH-L50B6A A-Board (9/18)
  • Page 43 Model No. : TH-L50B6A A-Board (10/18)
  • Page 44 Model No. : TH-L50B6A A-Board (11/18)
  • Page 45 Model No. : TH-L50B6A A-Board (12/18)
  • Page 46 Model No. : TH-L50B6A A-Board (13/18)
  • Page 47 Model No. : TH-L50B6A A-Board (14/18)
  • Page 48 Model No. : TH-L50B6A A-Board (15/18)
  • Page 49 Model No. : TH-L50B6A A-Board (16/18)
  • Page 50 Model No. : TH-L50B6A A-Board (17/18)
  • Page 51 Model No. : TH-L50B6A A-Board (18/18)
  • Page 52 Model No. : TH-L50B6A GK-Board...
  • Page 53 Model No. : TH-L50B6A K-Board...
  • Page 54 Model No. : TH-L50B6A LD-Board...
  • Page 55 Model No. : TH-L50B6A P-Board (1/2)
  • Page 56 Model No. : TH-L50B6A P-Board (2/2)

  • Page 57: Printed Circuit Board

    TH-L50B6A 12 Printed Circuit Board Model No. : TH-L50B6A A-Board (Top Component Side)
  • Page 58 Model No. : TH-L50B6A A-Board (Bottom Component Side)
  • Page 59 Model No. : TH-L50B6A GK-Board...
  • Page 60 Model No. : TH-L50B6A K-Board...
  • Page 61 Model No. : TH-L50B6A LD-Board...
  • Page 62 Model No. : TH-L50B6A P-Board (Top Component Side)
  • Page 63 Model No. : TH-L50B6A P-Board (Bottom Component Side)

  • Page 64: Exploded View And Replacement Parts List

    TH-L50B6A 13 Exploded View and Replacement Parts List Model No. : TH-L50B6A Parts Location...
  • Page 65 Model No. : TH-L50B6A Packing Exploded View 1...
  • Page 66 Model No. : TH-L50B6A Packing Exploded View 2...
  • Page 67 Model No. : TH-L50B6A 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 C2014 F1K1E106A134 C 10UF, 25V C2023 F1G1C104A077 C 0.1UF 16V C2801 F1G1C1030008 C 0.01UF 16V...
  • Page 68 Model No. : TH-L50B6A Parts List Ref. Change Safety Part No. Part Name & Description Q'ty Remarks C5402 F1G1C104A077 C 0.1UF 16V C5403 F1J0J2260004 C 22 UF 6.3 V C5404 F1J0J2260004 C 22 UF 6.3 V C5407 F1G1E333A059 C 0.033UF, 25V...
  • Page 69 Model No. : TH-L50B6A Parts List Ref. Change Safety Part No. Part Name & Description Q'ty Remarks C7304 F1A3A221A060 C 220PF 1KV C7305 F1J1H104A902 C 0.1UF, 50V C7306 F1J1H104A902 C 0.1UF, 50V C7307 F1J1H101A906 C 100PF, 50V C7310 F2A1E4710124 C 470UF, 25V...
  • Page 70 Model No. : TH-L50B6A Parts List Ref. Change Safety Part No. Part Name & Description Q'ty Remarks C8105 F1G1E332A144 C 3300PF , 25V C8107 F1J0G2260001 C 22 UF 4 V C8108 F1J0G2260001 C 22 UF 4 V C8109 F1G1E472A144 C 4700pF 25V...
  • Page 71 Model No. : TH-L50B6A Parts List Ref. Change Safety Part No. Part Name & Description Q'ty Remarks D3006 K7AAAY000016 DIODE D3101 DZ2J140M0L DIODE D3102 DZ2J140M0L DIODE D3103 DZ2J140M0L DIODE D3104 DZ2J140M0L DIODE D3105 DZ2J140M0L DIODE D3106 DZ2J140M0L DIODE D3107 DZ2J140M0L...
  • Page 72 Model No. : TH-L50B6A Parts List Ref. Change Safety Part No. Part Name & Description Q'ty Remarks D9816 DA2JF2300L DIODE INTEGRATED CIRCUITS IC3052 C0ABBB000179 IC4900 C1AB00003984 IC5000 AN34043AAVF IC5400 C0DBAYY01299 IC5420 C0DBAYY01299 IC5421 C0DBAYY01300 IC5704 C0DBEYY00102 IC7201 C0DBBYY00058 IC7301 C0DBAYY01329...
  • Page 73 Model No. : TH-L50B6A Parts List Ref. Change Safety Part No. Part Name & Description Q'ty Remarks Q2013 B1ABCE000015 TRANSISTOR Q3102 B1ABCE000015 TRANSISTOR Q3103 B1ABCE000015 TRANSISTOR Q4702 B1ABCF000231 TRANSISTOR Q4709 B1ABCF000231 TRANSISTOR Q4981 B1ABCE000015 TRANSISTOR Q7201 B1CERR000085 TRANSISTOR Q7202 B1ADCE000022...
  • Page 74 Model No. : TH-L50B6A Parts List Ref. Change Safety Part No. Part Name & Description Q'ty Remarks R2010 D0GDR00J0004 M 0 OHM, 1/8W R2013 D0GA101JA039 M 100OHM,J.1/10W R2014 D0GA101JA039 M 100OHM,J.1/10W R2016 D0GA302JA023 M 3K OHM J ,1/16W R2051 D0GA101JA039 M 100OHM,J.1/10W...
  • Page 75 Model No. : TH-L50B6A Parts List Ref. Change Safety Part No. Part Name & Description Q'ty Remarks R4752 D1BA1600A023 M 160 OHM,F.1/16 W R4753 D1BA82R0A023 M 82KOHM , 1/8W R4764 D0GA473JA039 M 47KOHM J. 1/10W R4766 D0GA473JA039 M 47KOHM J. 1/10W...
  • Page 76 Model No. : TH-L50B6A Parts List Ref. Change Safety Part No. Part Name & Description Q'ty Remarks R5429 D1BA1402A023 M 14KOHM,F. 1/16 W R5430 D1BA1001A023 M 1 KOHM,F.1/16 W R5431 D0GA473JA039 M 47KOHM J. 1/10W R5432 D1BA2702A023 M 27KOHM,F,1/16W R5712 D0GA332JA023 M 3.3KOHM, J,1/16W...
  • Page 77 Model No. : TH-L50B6A Parts List Ref. Change Safety Part No. Part Name & Description Q'ty Remarks R7401 D0GD472JA052 M 4.7KOHM,J,1/8W R7402 D0GD103JA052 M 10KOHM,J,1/8W R7403 D0GD102JA052 M 1.0KOHM,J,1/8W R7404 D0GD104JA052 M 100KOHM,J,1/8W R7405 D0GD222JA052 M 2.2KOHM,J,1/8W R7406 D1BD3301A180 M 3.3KOHM, J,1/16W...
  • Page 78 Model No. : TH-L50B6A Parts List Ref. Change Safety Part No. Part Name & Description Q'ty Remarks R8307 D0GA360JA023 M 36 OHM, J,1/16W R8450 D0GA103JA039 M 10KOHM,F,1/16W R8451 D0GA103JA039 M 10KOHM,F,1/16W R8455 D0GA103JA039 M 10KOHM,F,1/16W R8458 D1BA3742A023 M 37.4 KOHM,F.1/16 W...
  • Page 79 Model No. : TH-L50B6A Parts List Ref. Change Safety Part No. Part Name & Description Q'ty Remarks R9831 D0GD2R2JA059 M 2.2 OHM,J.1/4W R9832 D0GD103JA052 M 10KOHM,J,1/8W R9833 D0GD123JA052 M 12KOHM,J,1/8W R9834 D0GD184JA052 M 180KOHM,J,1/8W R9835 D0GD274JA052 M 270K OHM,F.1/16 W...
  • Page 80 Model No. : TH-L50B6A Parts List Ref. Change Safety Part No. Part Name & Description Q'ty Remarks PA7406 ERBRE5R00V FUSE RESISTOR PC7301 B3PAA0000674 PHOTO COUPLER PC7302 B3PAA0000674 PHOTO COUPLER PC7303 B3PAA0000674 PHOTO COUPLER RM2800 B3RBB0000018 PHOTO DETECTOR SN2800 B3JB00000208 SW2851 EVQ11G05R...
  • Page 81 Model No. : TH-L50B6A Parts List Ref. Change Safety Part No. Part Name & Description Q'ty Remarks Exploded View K2CJ2YY00087 AC CORD L0EYAA000026 SPEAKER UNIT L5EDDYY00474 LCD PANEL N2QAYB000817 REMOTE TRANSMITTER TBL5ZX06661 PEDESTAL ASSY TBL5ZX06671 STAND MTG ASSY TBM4GD0771 MODEL NAME PLATE...

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