Panasonic TH-80LFB70E Service Manual
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Panasonic TH-80LFB70E Service Manual

Panasonic TH-80LFB70E Service Manual

Touch screen lcd display
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Touch Screen LCD Display
TH-80LFB70E
Model No.
LA54 Chassis
© Panasonic Corporation 2014
Unauthorized copying and distribution is a violation
of law.
ORDER NO.PCZ1403058CE

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  • Page 1 ORDER NO.PCZ1403058CE Touch Screen LCD Display TH-80LFB70E Model No. LA54 Chassis © Panasonic Corporation 2014 Unauthorized copying and distribution is a violation of law.

  • Page 2: Table Of Contents

    TH-80LFB70E TABLE OF CONTENTS PAGE PAGE 1 Safety Precautions -----------------------------------------------3 1.1. General Guidelines ----------------------------------------3 1.2. Touch-Current Check--------------------------------------3 2 Warning --------------------------------------------------------------4 2.1. Prevention of Electrostatic Discharge (ESD) to Electrostatically Sensitive (ES) Devices ----------4 2.2. About lead free solder (PbF) ----------------------------5 3 Service Navigation------------------------------------------------6 3.1.

  • Page 3: Safety Precautions

    TH-80LFB70E 1 Safety Precautions 1.1. General Guidelines 1. When conducting repairs and servicing, do not attempt to modify the equipment, its parts or its materials. 2. When wiring units (with cables, flexible cables or lead wires) are supplied as repair parts and only one wire or some of the wires have been broken or disconnected, do not attempt to repair or re-wire the units.

  • Page 4: Warning

    TH-80LFB70E 2 Warning 2.1. Prevention of Electrostatic Discharge (ESD) to Electrostatically Sensi- tive (ES) Devices Some semiconductor (solid state) devices can be damaged easily by static electricity. Such components commonly are called Elec- trostatically 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)

    TH-80LFB70E 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-80LFB70E 3 Service Navigation 3.1. Service Hint Board Name Function P-Board Power supply Non serviceable. P-Board should be exchanged for service. A-Board Digital Signal Processor DS-Board Slot Interface HX-Board Speaker Terminal, PC OUT/RS232C H1-Board USB Terminal V1-Board Power LED Remote Receiver, C.A.T.S. Sensor...

  • Page 7: Applicable Signals

    TH-80LFB70E 3.2. Applicable signals...
  • Page 8 TH-80LFB70E...

  • Page 9: Specifications

    TH-80LFB70E 4 Specifications Power Source 220 - 240 V AC, 50/60Hz Power Consumption Power on 350 W Stand-by condition 0.5 W Power off condition 0.3 W LCD Display panel 80-inch VA panel (LED backlight), 16:9 aspect ratio 1,771 mm (W)  996 mm (H)  2,032 mm (diagonal) Screen size 2,073,600 (1,920 (W) ...
  • Page 10 TH-80LFB70E Notes: • Design and specifications are subject to change without notice. Mass and dimensions shown are approximate. • This equipment complies with the EMC standards listed below. EN55022, EN55024, EN61000-3-2, EN61000-3-3.

  • Page 11: Service Mode

    TH-80LFB70E 5 Service Mode 5.1. CAT (Computer Aided Test) mode How to access the CAT mode. Method A Main unit + remote control operation Press and hold the button on the right side of the unit and press the RECALL button on the remote control 3 times quickly within 2 second, this will place the unit into the CAT mode.
  • Page 12 TH-80LFB70E 5.1.2. CD mode Select the CD mode by Up/Down button on the remote control at the front page of CAT mode and then press the Mute button on the remote control more than 3 seconds. Memory data change To exit the CD mode, press the R button on the remote control.
  • Page 13 TH-80LFB70E 5.1.3. SD mode Select the SD mode by Up/Down button on the remote control at the front page of CAT mode and then press the Action button on the remote control. To exit the SD mode, press the R button on the remote control.
  • Page 14 TH-80LFB70E 5.1.5. NW mode Note : To use the network function, set each "Network Setup" setting and make sure to set the "Control I/F Select" to "LAN" or “RS232C”. Select the NW mode by Up/Down button on the remote control at the front page of CAT mode and then press the Action button...
  • Page 15 TH-80LFB70E To exit the NW mode, press the R button on the remote control. 5.1.6. ID mode Select the ID mode by Up/Down button on the remote control at the front page of CAT mode and then press the Mute button on the remote control more than 3 seconds.

  • Page 16: Iic Mode Structure (Following Items Value Is Sample Data)

    TH-80LFB70E 5.2. IIC mode structure (following items value is sample data)

  • Page 17: Troubleshooting Guide

    TH-80LFB70E 6 Troubleshooting Guide 6.1. Self Check 6.1.1. Display Indication 1. Self-check is used to automatically check the bus line controlled circuit of the LCD display. 2. To get into the Self-check mode, press the volume down button on the right side of the unit, at the same time pressing the OFF-TIMER button on the remote control, and the screen will show.
  • Page 18 TH-80LFB70E 6.1.2. Power LED Blinking timing chart 1. Subject Information of LED Blinking timing chart. 2. Contents When an abnormality has occurred to the unit, the protection circuit operates and resets to the stand by mode. At this time, the defective block can be identified by the number of blinks of the Power LED on the front panel of the unit.

  • Page 19: No Power

    TH-80LFB70E 6.2. No Power First check point There are following 3 states of No Power indication by power LED. 1. No lit. 2. Green is lit then turns red blinking a few seconds later. 3. Only red is lit. 6.3.

  • Page 20: Diagnosis Of The Image

    TH-80LFB70E 6.4. Diagnosis of the image 6.4.1. LCD Panel test mode...
  • Page 21 TH-80LFB70E...

  • Page 22: Diagnosis Of Touch Panel

    TH-80LFB70E 6.4.2. How to check when the image does not appear correctly in DIGITAL LINK • Check whether all of (A), (B), (C), and (D) are “OK” in NW mode. • Check whether "H67DLK" is "OK" in ID mode. 6.5.

  • Page 23: Disassembly And Assembly Instructions

    TH-80LFB70E 7 Disassembly and Assembly Instructions 7.1. Back Cover and Board Removal of Back Cover when replacing each board...

  • Page 24: Preparations

    TH-80LFB70E Caution when attaching WI-FI Dongle • Please attach the projection on the back side of a WI-FI 7.2. Preparations Dongle to a WI-FI Dongle attachment hole firmly. • When you exchange modules or board, in order to make it discharge from an electrolytic condenser, please wait for 1 minute after the power supply end.

  • Page 25: Replacement Of H1-Board

    TH-80LFB70E 7.6. Replacement of Wire (A-WIFI) About the Adjustment Sheet • When replacing the Back Cover Assy (L), be sure to 1. Remove the H1-Board. replace the Adjustment Sheet at the same time. (Refer to steps 1 to 2 in “7.5. Replacement of H1-Board”) Caution when removing Back Cover 2.

  • Page 26: Replacement Of A-Board

    TH-80LFB70E 7.8. Replacement of A-Board Replacement of aluminum tape • Be sure to stick the aluminum tape when replacing DS- 1. Remove the screws fixing the Terminal Bracket Metal and Board. A-Board and then remove the Terminal Bracket Metal. <Sticking specification of the aluminum tape>...
  • Page 27 TH-80LFB70E Attention when replacing A-Board • Please stick PET+AL-tape and Aluminum tape on the posi- • The shield is not attached to A-Board for repair. tion of the following figure after attaching a shield to A- Please be sure to remove a shield from A-Board and reuse Board.

  • Page 28: Replacement Of Terminal Bracket Metal

    TH-80LFB70E Attention when replacing Terminal Bracket Metal • When replacing Terminal Bracket Metal, please also replace the gaskets at the same time. 7.10. Replacement of HX-Board 1. Disconnect the connectors and remove the screws and then remove the HX-Board. 7.9.

  • Page 29: Replacement Of P-Board

    TH-80LFB70E 7.11. Replacement of P-Board 7.12. Replacement of V2-Board 1. Disconnect the connectors and remove the screws and 1. Remove the Control Panel from hooks and then remove then remove the P-Board. the Control Panel. 2. Disconnect the connector and remove the screws and then remove the V2-Board.

  • Page 30: Replacement Of Ac Inlet

    TH-80LFB70E Caution when attaching Power Button Spring 2. Remove the screws and then remove the Speaker (L, R). • Attach the Power Button Spring within the limits of a dotted line enclosure. 7.14. Replacement of AC Inlet 1. Disconnect the connector and remove the screw and then remove the Inlet Assy.

  • Page 31: Replacement Of Lcd Panel

    TH-80LFB70E 7.17. Replacement of LCD Panel Attention when removing LCD Panel • Please work by three or more persons. • Two persons move a LCD Panel to the stable level place in which it had a LCD Panel and which was covered with soft cloth and sponge.
  • Page 32 TH-80LFB70E...
  • Page 33 TH-80LFB70E...
  • Page 34 TH-80LFB70E • When replacing the LCD Panel, please replace the alumi- Attention when removing Slot Block • Remove the conductive tape and aluminum tape on the num tape and wiring tape at the same time. LCD Panel. * The specifications of sticking may change without notice and sometimes the parts may remain.
  • Page 35 TH-80LFB70E Caution when attaching Slot Fixing Metal and A PCB R) first and then remove the Cab Fixing Metal (T, B). Fixing Metal • Attach on the basis of mounting holes. 6. Remove the screws and then remove the VESA Metal Up and Hangar Stand Metal (L, R).
  • Page 36 TH-80LFB70E 8. Take out the FFC (from V1-Board) and the lead wire (from (2) With LCD Panel held, two persons need to be Touch Module) attached to the side of the LCD Panel to divided into the left and the right and raise the outside of the Cabinet.
  • Page 37 TH-80LFB70E Caution when attaching P PCB Fixing Metal Attention when replacing LCD Panel • The Metal must not overlap the boss of LCD Panel. (1) Attach a VESA Metal Up (with VESA Metal) to the • Tightened in order of (1-2), the other screws are free.
  • Page 38 TH-80LFB70E (5) Adjust corner of LCD Panel to the lower right edge of Touch Panel Fixing Metal as shown in the following figure. (6) Holding the LCD Panel, turn from right and left, hold the VESA Metal and put calmly on to the...
  • Page 39 TH-80LFB70E Caution about the parts stuck on the LCD Panel • After connecting the flexible cables and the LVDS cable, please stick the tapes and gasket at sticking positions of the LCD Panel. * Specification of sticking may change without notice and sometimes the parts may remain...
  • Page 40 TH-80LFB70E...
  • Page 41 TH-80LFB70E...
  • Page 42 TH-80LFB70E...

  • Page 43: Replacement Of Front Glass

    TH-80LFB70E 7.18. Replacement of Front Glass 1. Remove the LCD Panel from the Cabinet. (Refer to steps 1 to 9 in “7.16. Replacement of LCD Panel”) 2. Remove the screws and remove the Touch Panel Fixing Metal and then remove the Front Glass from the Cabinet.
  • Page 44 TH-80LFB70E Quality Criterion of sticking felt • When sticking felt, please do not stick on a Touch Panel Fixing Metal by any means. • When you stick felt, please stick not to overflow into the inner side of TP PCB Cover Metal under Front Glass.
  • Page 45 TH-80LFB70E Sticking position of felt • Stick the felt along with a Touch Panel Fixing Metal with the center of a Touch Panel Fixing Metal as the starting point.

  • Page 46: Replacement Of V1-Board, V Pcb Fixing Metal, And Dec Led Panel

    TH-80LFB70E 7.19. Replacement of V1-Board, V PCB Fixing Metal, and DEC LED Panel 1. Remove the LCD Panel from the Cabinet. (Refer to steps 1 to 9 in “7.17. Replacement of LCD Panel”) 2. Remove the Front Glass from the Cabinet.

  • Page 47: Replacement Of Touch Module

    TH-80LFB70E 7.20. Replacement of Touch Module 1. Remove the LCD Panel from the Cabinet. (Refer to steps 1 to 9 in “7.17. Replacement of LCD Panel”) 2. Remove the Front Glass from the Cabinet. (Refer to step 2 in “7.18. Replacement of Front Glass”) 3.
  • Page 48 TH-80LFB70E Caution when attaching FFC of a Touch Module • Please insert the Touch Module FFC between Touch Modules firmly to the back of a connector. • When replacing a Touch Panel module or Touch Module FFC, please remove Adhesive tape finely and use a new one.
  • Page 49 TH-80LFB70E Sticking position of felt • As shown in the following figure, please stick felt on a TP PCB Cover Metal.

  • Page 50: Attachment Procedure Of Touch Panel Filter

    TH-80LFB70E 7.21. Attachment procedure of Touch Panel Filter 1. Insert the TP PCB Cover Metal in the Cabinet as shown in the following figure. 2. Insert the Touch Panel Filter between TP PCB Cover Metal and the Cabinet as shown in the following figure.

  • Page 51: Replacement Of Cabinet

    TH-80LFB70E 7.22. Replacement of Cabinet 1. Remove the LCD Panel from the Cabinet. (Refer to steps 1 to 9 in “7.17. Replacement of LCD Panel”) 2. Remove the Front Glass from the Cabinet. (Refer to step 2 in “7.18. Replacement of Front Glass”) 3.

  • Page 52: Replacement Of Cab Fixing Metal (T, B, L, R) And Back Cover Blind Metal (T, B, L, R)

    TH-80LFB70E 7.23. Replacement of Cab Fixing Metal (T, B, L, R) and Back Cover Blind Metal (T, B, L, R) 1. Remove the Cab Fixing Metal (T, B, L, R) from the LCD Panel. (Refer to steps 1 to 7 in “7.17. Replacement of LCD Panel”)
  • Page 53 TH-80LFB70E Attention when replacing Cab Fixing Metal (B, L) • In the case of exchange of a Cabinet Fixing Metal (B) and (L), it is a position of the following figure about sponge / gasket / felt. • Please be alike and stick.
  • Page 54 TH-80LFB70E...

  • Page 55: Block Diagram

    TH-80LFB70E 8 Block Diagram 8.1. Main Block Diagram DIGITAL SIGNAL PROCESSOR AUDIO IN HDMI1,2 VIDEO IN Touch Panel(IR) HIGH SIDE SW Digital-Link Digital-Link USB TERMINAL S3.3VLAN FLASH MEMORY HIGH SIDE SW S3.3VLAN LAN DATA VBUS S1.5VLAN HDBase-T/ DDR3 SIGMA S2.5VLAN S3.3VLAN...

  • Page 56: Block (1 Of 4) Diagram

    TH-80LFB70E 8.2. Block (1 of 4) Diagram DIGITAL SIGNAL PROCESSOR DS SLOT INTERFACE Q3140,41 DS10 DS10 A10 BUFFER AUDIO IN L AUDIO IN L AUDIO IN R AUDIO IN R A_OA+- OE+- A_EA+- EE+- A_CLK+- A_ED+/- TX3+/- A_OE+/- TX9+/- SLOT_RXD...

  • Page 57: Block (2 Of 4) Diagram

    TH-80LFB70E 8.3. Block (2 of 4) Diagram JK2103 JK2101 JK2104 JK2106 JK2107 JK2105 VIDEO IN PC AUDIO IN PC IN HDMI1 IN HDMI2 IN DVI IN DIGITAL SIGNAL PROCESSOR IC2701 IC2105 PULSE TRANCE HDBase T Receiver VIDEO/AUDIO SIGNAL SELECT JK2701...

  • Page 58: Block (3 Of 4) Diagram

    TH-80LFB70E 8.4. Block (3 of 4) Diagram DIGITAL SIGNAL PROCESSOR AUDIO OUT R/L IC2114 VIDEO SW +1.5V_DDR VOUT ASIC 30bit_RGB VIDEO SIGNAL PROCESSOR IC8001 30bit_ASIC OUT +1.5V_DDR IC4001 SCX2A LVDS RECEIVER & TTL PARALLEL SCX IN A R/G/B ASIC OUT2...

  • Page 59: Block (4 Of 4) Diagram

    TH-80LFB70E 8.5. Block (4 of 4) Diagram DIGITAL SIGNAL PROCESSOR IC4813 USB TERMINAL USB SW Q5000 USBSW_ON/OFF JK3802 PC_DET JK3801 L OUT- SP_L- SPEAKER L IC4802 USB5V_1 VBUS L OUT+ SP_L+ S3.3VLAN VBUS USB_VBUS1 PC_USB5V IC2004 24MHz USB_DN1 SOUND15V SP AMP...

  • Page 60: Wiring Connection Diagram

    TH-80LFB70E 9 Wiring Connection Diagram...
  • Page 61 TH-80LFB70E...

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