TH-80BF1U, TH-80BF1W, TH-80BF1E — Panasonic TV Service Manual (repair manual). Page 26

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INF-18
SECTION 1 SERVICE INFORMATION
<80BF1>
4.4. Dignosis of Touch Panel]
When a touch panel does not work, narrowing down of the failure part of a setup, and a touch panel or A-Board can be per-
formed.
4.5. Diagnosis of the Wi-Fi dongle
Wired LAN works, but the wireless LAN does not work, there is a problem with the dongle side.
(However, the factor of radio environment is excluded.)
4.3.2. How to check when the image does not appear correctry in DIGITAL LINK
1. Check whether all of (A), (B), (C), and (D) are “OK” in NW mode.
2. Check whether "H67DLK" is "OK" in ID mode.
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TH-50LFB70U/TH-50LFB70W
• Check whether "H67DLK" is "OK" in ID mode.
6.5. Diagnosis of Touch Panel
• When a touch panel does not work, narrowing down of the failure part of a setup, and a touch panel or A-Board can be per-
formed.
6.6. Diagnosis of the Wi-Fi dongle
• Wired LAN works, but the wireless LAN does not work, there is a problem with the dongle side.
(However, the factor of radio environment is excluded.)
(p.73).
DIS-1
SECTION
2
CONTENTS
1. Parts Locations  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .DIS-2
1.1. Electrical parts location (P.C. Modules)
2. Parts Disassembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .DIS-3
2.1. Precautions
2.2. Preparations
2.3. Replacement of Wi-Fi Module
2.4. Removal of Back Cover Comp
2.5. Replacement of USB Terminal Module
2.6. Replacement of Wire (A-WIFI)
2.7. Replacement of Function Slot Module
2.8. Replacement of A-Module
2.9. Replacement of Terminal Bracket Assy
2.10. Replacement of Terminal Module
2.11. Replacement of P-Module
2.12. Replacement of Key Module
2.13. Replacement of Control Assy and Power Button
2.14. Replacement of Inlet Assy
2.15. Replacement of Speaker (L, R)
2.16. Replacement of Fan
2.17. Replacement of LCD Panel and Front Glass
2.18. Replacement of Front Glass
2.19. Replacement of IR Module, IR PCB Fixing Metal, and DEC LED Panel
2.20. Replacement of Touch Module
2.21. Attachment procedure of Touch Panel Filter
2.22. Replacement of Cabinet
2.23.  Replacement of Cab Fixing Metal (T, B, L, R) and Back Cover Blind Metal (T, B, L, R)
2.24. Wiring connections
2.25. Specification of sticking
SECTION 2 DISASSEMBLY PROCEDURES
DIS-2
SECTION 2 DISASSEMBLY PROCEDURES
<80BF1>
1. Parts Locations
1.1. Electrical parts location (P.C. Modules)
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TH-80LFB70U/TH-80LFB70W
7 Disassembly and Assembly Instructions
7.1. Back Cover and Board
Removal of Back Cover when replacing each board
  A-Module (A)
  IR Module (V1)
Function slot  Module (DS)
USB Terminal Module (H1)
   P-Module (P)
Key Module (V2)
Terminal Module (HX)
Module
Function
Remark
A Module
Digital Signal Processor
Non serviceable.
A-Module should be exchanged for service.
All modules are non serviceable 
and should be exchanged for 
repair.
IR Module
Power LED Remote Receiver, C.A.T.S. Sensor
Non serviceable.
IR-Module should be exchanged for service.
P Module
Power supply
Non serviceable.
P-Module should be exchanged for service.
Key Module
Control Panel
Non serviceable.
Key-Module should be exchanged for service.
Function Slot Module
Slot Interface
Non serviceable.
Function Slot-Module should be exchanged for service.
Terminal Module
Speaker Terminal, PC OUT/RS232C
Non serviceable.
Terminal-Module should be exchanged for service.
USB Terminal Module
USB Terminal
Non serviceable.
USB-Module should be exchanged for service.
Wi-Fi Module
Wireless LAN Adaptor
DIS-3
SECTION 2 DISASSEMBLY PROCEDURES
<80BF1>
2. Parts Disassembly
2.1. Precautions
* Before Disassembling, turn the display off and disconnect the power plug from the wall outlet.
* When tore off sticky tapes, please use a new thing without reusing it on the occasion of assembling.
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TH-50LFB70U/TH-50LFB70W
7.2. Preparations
• 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. 
• To avoid damaging the LCD panel, lay out a soft cloth or
towel and lay down the unit so the front side is facing down.
Precautions when replacing each component
• When you replace each component, please be sure to carry
out following procedure as below.
• Be careful not to overtighten the screws when replacing
each module.
• Please remove a clamper and a wire processing tape if
needed in the repaire.
• In carrying out Section 7.7. or later, please execute the
Chapter 7.6. and 7.5. in advance.
7.3. Replacement of WI-FI Module 
(Dongle)
1. Remove the screw and then remove the WI-FI Module
(Dongle).
2.2. Preparations
•  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.
•  To avoid damaging the LCD Panel, lay out a soft cloth or towel, and turn the front of the unit down, and lay down so that the 
entire monitor rides on a table completely. 
    Note:When local pressure is surppressed, Mura of the picture image may be seen. In this case ,please carry out aging by 
    burn in mode. (Refer to INF.7 in the SECTION 1)
Precautions when replacing each component
• When you replace each component, please be sure to carry out following procedure as below.
• Be careful not to overtighten the screws when replacing each module.
• Please remove a clamper and a wire processing tape if needed in the repair.
2.3. Replacement of Wi-Fi Module
1. Remove the screw and then remove the Wi-Fi Module (Wireless LAN Adaptor).
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TH-65LFB70U/TH-65LFB70W
7.2. Preparations
• 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. 
• To avoid damaging the LCD Panel, lay out a soft cloth or
towel and lay down the unit so the front side is facing down.
Precautions when replacing each component
• When you replace each component, please be sure to carry
out following procedure as below.
• Be careful not to overtighten the screws when replacing
each module.
• Please remove a clamper and a wire processing tape if
needed in the repaire.
• In carrying out Section 7.7. or later, please execute the
Chapter 7.6. and 7.5. in advance.
7.3. Replacement of WI-FI Module 
(Dongle)
1. Remove the screw and then remove the WI-FI Module
(Dongle).
Soft cloth and Towel
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TH-80LFB70U/TH-80LFB70W
7.2. Preparations
• 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. 
• To avoid damaging the LCD panel, lay out a soft cloth or
towel and lay down the unit so the front side is facing down.
Precautions when replacing each component
• When you replace each component, please be sure to carry
out following procedure as below.
• Be careful not to overtighten the screws when replacing
each module.
• Please remove a clamper and a wire processing tape if
needed in the repaire.
7.3. Replacement of WI-FI Module 
(Dongle)
1. Remove the screws and then remove the WI-FI Module
(Dongle).
Caution when attaching WI-FI Module (Dongle)
• Please attach the projection on the back side of a WI-FI
Module (Dongle) to a WI-FI Module (Dongle) attachment
hole firmly.
7.4. Removal of Back Cover
1. Remove the screws.
2. Remove the M8 Caps.
3. Remove the Back Cover Comp (R), Back Cover Assy (L,
C) and 2 Handles.
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TH-80LFB70U/TH-80LFB70W
7.2. Preparations
• 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. 
• To avoid damaging the LCD panel, lay out a soft cloth or
towel and lay down the unit so the front side is facing down.
Precautions when replacing each component
• When you replace each component, please be sure to carry
out following procedure as below.
• Be careful not to overtighten the screws when replacing
each module.
• Please remove a clamper and a wire processing tape if
needed in the repaire.
7.3. Replacement of WI-FI Module 
(Dongle)
1. Remove the screws and then remove the WI-FI Module
(Dongle).
Caution when attaching WI-FI Module (Dongle)
• Please attach the projection on the back side of a WI-FI
Module (Dongle) to a WI-FI Module (Dongle) attachment
hole firmly.
7.4. Removal of Back Cover
1. Remove the screws.
2. Remove the M8 Caps.
3. Remove the Back Cover Comp (R), Back Cover Assy (L,
C) and 2 Handles.
DIS-4
SECTION 2 DISASSEMBLY PROCEDURES
<80BF1>
2.4. Removal of Back Cover Comp
 1. Remove the screws.
 2. Remove the M8 Caps.
 3. Remove the Back Cover Comp (R), Back Cover Assy (LC) and 2 Handles.
About the Adjustment Sheet
When replacing the Back Cover Assy (L), be sure to replace the Adjustment Sheet at the same time.
Caution when removing Back Cover Comp
When repairing in an upright position the Display, please remove the screws while holding the Back Cover by hand to prevent 
the Back Cover from falling down.
Caution when attaching Back Cover
After attaching the Back Cver Assy (C), attach the Back Cover Assy (L) aand Back Cover Comp (R).
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TH-80LFB70U/TH-80LFB70W
7.2. Preparations
• 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. 
• To avoid damaging the LCD panel, lay out a soft cloth or
towel and lay down the unit so the front side is facing down.
Precautions when replacing each component
• When you replace each component, please be sure to carry
out following procedure as below.
• Be careful not to overtighten the screws when replacing
each module.
• Please remove a clamper and a wire processing tape if
needed in the repaire.
7.3. Replacement of WI-FI Module 
(Dongle)
1. Remove the screws and then remove the WI-FI Module
(Dongle).
Caution when attaching WI-FI Module (Dongle)
• Please attach the projection on the back side of a WI-FI
Module (Dongle) to a WI-FI Module (Dongle) attachment
hole firmly.
7.4. Removal of Back Cover
1. Remove the screws.
2. Remove the M8 Caps.
3. Remove the Back Cover Comp (R), Back Cover Assy (L,
C) and 2 Handles.
23
TH-80LFB70U/TH-80LFB70W
7.2. Preparations
• 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. 
• To avoid damaging the LCD panel, lay out a soft cloth or
towel and lay down the unit so the front side is facing down.
Precautions when replacing each component
• When you replace each component, please be sure to carry
out following procedure as below.
• Be careful not to overtighten the screws when replacing
each module.
• Please remove a clamper and a wire processing tape if
needed in the repaire.
7.3. Replacement of WI-FI Module 
(Dongle)
1. Remove the screws and then remove the WI-FI Module
(Dongle).
Caution when attaching WI-FI Module (Dongle)
• Please attach the projection on the back side of a WI-FI
Module (Dongle) to a WI-FI Module (Dongle) attachment
hole firmly.
7.4. Removal of Back Cover
1. Remove the screws.
2. Remove the M8 Caps.
3. Remove the Back Cover Comp (R), Back Cover Assy (L,
C) and 2 Handles.

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