TH-80BF1U, TH-80BF1W, TH-80BF1E - Panasonic TV Service Manual (repair manual). Page 21

View Panasonic TH-80BF1U / TH-80BF1W / TH-80BF1E Service Manual online

INF-13
SECTION 1 SERVICE INFORMATION
<80BF1>
4. Troubleshooting Guide
The failure symptom "Power off" or "No picture or No sound" is reported but it can not be confirmed in the service, use this 
function to confirm the failure status and narrow down the failure circuit.
4.1. Self check of signal system
4.1.1. Display Indication
1. Method A Self-check only (A shipment setup is not carried out).
  1.1. Display the CAT mode (Refer to 3.1.).
  1.2.  The CAT mode menu appears on the screen. Select the [ID Mode] menu with [pq] buttons, and press and hold the 
[MUTE] button until the ID mode menu appears. (It takes a few seconds to display it.)
2. Method B Self-check+Shipment setup
  2.1. Press and hold the button on the right side of the unit and press the OFF-TIMER button on the remote control.
To exit the ID mode
Turn the Display off with remote control or unit.
CAT Panel sys.8.2
IIC Mode
CD Mode
NW Mode
SD Mode
MS Mode
ID Mode
Method A
Main unit + remote control operation
Press and hold the VOL down 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.
Method B
Remote control operation only
1. Set the OFF timer except for [0] minute by OFF TIMER button. (30 minutes, 60 minutes, 90 minutes)
2. Set the volume level of sound to 0 by VOL down button / -button.
3. Press the RECALL button more than 3 seconds before a volume display disappears. 
Main unit
Remote control
Button
Button
Press and hold
Right side of the unit
OFF TIMER
- 19 -
6 故障診断法
サービスの際「時々、電源切れ」、
「時々、映像・音声なし」の症状が確認できない時、自己診断機能を用いること
で発生有無の確認と故障回路の絞込みができます。
6.1.
信号系の自己診断
セルフチェックの表示方法は2通りあります。
①セルフチェックのみ(出荷設定はしない)
②セルフチェック+出荷設定
■表示方法
①の場合:市場調整モードの「ID MODE」選択し、リモコン「MUTE」ボタンを長押し(3秒)します。
(市場調整モードの表示方法は、5.1.参照)
②の場合:本体「音量-」ボタンを押しながら、リモコン「OFF TIMER」ボタンを押します。
INF-14
SECTION 1 SERVICE INFORMATION
<80BF1>
n
 Display screen image
n
 Treatment action
Items
IIC Device
Symptom
Action
IIC1
H90MEM
Not memorized set value.
Check or replace A module
IIC2
H65AVSW
Can not input switching of Component video or PC input.
H61ADV
The image does not appear correctly. (Component video, HDMI, 
DVI, DIGITAL LINK, PC input)
No sound.
H62TEMP
High temperature is detected inside the display.
H63CPG
Picture abnormality. (Signal is not sync.)
IIC3
H66HDMIRX
Abnormality on the picture. (Miracast, Panasonic APPLICATION,
MEMORY VIEWER, WHITE BOARD)
H51RTC
Not operate timer function
Check or replace DS module
IIC4
H92MEM2
LAN MAC Address is abnormality.
Check or replace A module
H56LVDSRX
Input signal is out of synchronization.
Abnormality on the picture. (Except for the Composite video.)
H67DLK
Cannot receive signals through the LAN or DIGITAL LINK
H68FRC
It is not displayed video.
H93LAN
Can not LAN communications.
Abnormality to functions of Miracast, MEMORY VIEWER, WHITE 
BOARD, or Panasonic APPLICATION.
- 20 -
■表示画面 
■処置方法
表示記号
症状
処置
IIC 1
H 90 MEM 1
設定値が記憶されない。
A モジュールの点検・交換
IIC 2
H 65 AVSW
コンポーネントビデオ、パソコン入力の入力切替ができない。
H 61 ADV
コンポーネントビデオ、HDMI、DVI、DIGITAL LINK、パソコン入力の映
像がでない。音声がでない。
H 62 TEMP
温度エラーになる。(バックライトの明るさが低下したままになる)
H 63 CPG
同期信号がとれず、映像に異常が発生。
IIC 3
H 66 HDMIRX MIRRORING、Panasonic APPLICATION、MEMORY VIEWER、WHITE BOARD の
映像に異常。
H 51 RTC
タイマー機能が働かない。
DS モジュールの点検・交換
IIC 4
H 92 MEM 2
LAN MAC Address が異常。
A モジュールの点検・交換
H 56 LVDSRX 入力の同期が取れず、映像に異常が発生。
(コンポジットビデオを除く)
H 67 DLK
LAN 及び DIGITAL LINK の通信ができない。
H 68 FRC
映像系が映し出されない。
H 93 LAN
LAN の通信ができない。
MIRRORING、Panasonic APPLICATION、MEMORY VIEWER、WHITE BOARD の
機能に異常。
INF-15
SECTION 1 SERVICE INFORMATION
<80BF1>
4.2. Self check of power system
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 .
*  The failure code is the PTCT information displayed on the CD mode in the service mode.
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TH-50LFB70U/TH-50LFB70W
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.
*
 Refer to 6.1.1 Display Indication
INF-16
SECTION 1 SERVICE INFORMATION
<80BF1>
4.3. Diagnosis of the image
4.3.1. LCD Panel test mode
19
TH-50LFB70U/TH-50LFB70W
6.4. Diagnosis of the image
6.4.1.
LCD Panel test mode
INF-17
SECTION 1 SERVICE INFORMATION
<80BF1>
20
TH-50LFB70U/TH-50LFB70W
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. 
purple and
blue
blue
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).
23
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
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.
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.
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).
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.
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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