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Panasonic TH-42PX80U Technical Manual
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Panasonic TH-42PX80U Technical Manual

Troubleshooting handbook. plasma. gph11du chassis, hd models.
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See also: Service Manual
Technical Guide
Technical Guide
Model : TH
-
42PX80U
Model : TH
-
42PX80U
TH
-
50PX80U
TH
-
50PX80U
Panasonic Technology and Service Company
Plasma
Plasma
(GPH11DU Chassis)
(GPH11DU Chassis)
HD Models
HD Models
Troubleshooting Handbook
Troubleshooting Handbook
National Training

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Summary of Contents for Panasonic TH-42PX80U

  • Page 1 Technical Guide Technical Guide Plasma Plasma (GPH11DU Chassis) (GPH11DU Chassis) HD Models HD Models Troubleshooting Handbook Troubleshooting Handbook Model : TH 42PX80U Model : TH 42PX80U 50PX80U 50PX80U Panasonic Technology and Service Company National Training...
  • Page 2 This page is purposely left blank.

  • Page 3: Table Of Contents

    Table of Contents Subject Page Subject Page Connector’s Location (TH-42PX80U) No Picture\No OSD Power LED’s Response to Shutdown Operation No Sound LED blinks 1 time Troubleshooting for Picture Problems LED blinks 2 times Diagnostic Method for Troubleshooting PDP Television LED blinks 3 times...
  • Page 4 Introduction <Introduction> 1. Basic concept of how to determine the defective board 1) Verification of voltages Normally, when there is a power problem, shutdown occurs immediately. So, to resolve a power problem, voltage checks are necessary before shutdown. 2) Check if the power comes up after disconnecting the board under suspicion. If power comes up (*) after disconnecting a board, the board is defective.

  • Page 5: Connector's Location (Th-42Px80U)

    Connector’s Location (TH-42PX80U)
  • Page 6 1. Troubleshooting Shutdown Problems CAUTION: Some steps requires removal of connectors and sometimes PC boards removal. Do not let the TV run for more than 30 seconds while connectors or boards are disconnected.

  • Page 7: Power Led's Response To Shutdown Operation

    Power LED’s Response to Shutdown Operation <LED Blinking timing> 3.0sec (interval) Light <Check point> No Light Blinking Contents Check Point times STB5V sense time out A Board 15V line abnormality A Board (15V SOS) 3.3V line abnormality A Board (3.3V SOS) Power Supply abnormality P Board (Power SOS) 5V line abnormality...

  • Page 8: Led Blinks 1 Time

    LED blinks 1 time <Trouble Mode and Defective Board> Warning: Disconnect AC Power prior to Trouble Mode Defective Board making any disconnection or connection. Communication Error A, GS Disconnect GS52 on the SD Card Slot Board (GS board ) (See Figure 1). Plug in the TV and turn it on Is the power LED still blinking?

  • Page 9: Led Blinks 2 Times

    = The reference number of the sustain data connector is different in some of the models: 15V down SOS P, A, SC, SS Board (P > A, SC, SS) TH-42PX80U = SS23 TH-50PX80U = SS23 Unplug the TV and disconnect CN SC20 and SC2. (*2) CAUTION: Before connecting P2/SC2 or To isolate the SC board.

  • Page 10: Led Blinks 3 Times

    LED blinks 3 times <Trouble Mode and Defective Board> Warning: Disconnect AC Power prior to Trouble Mode Defective Board making any disconnection or connection. 3.3V down SOS A Board <How to find the defective boards> Replace the A board Note: CN = Connector...

  • Page 11: Led Blinks 4 Times

    LED blinks 4 times (TH-42PX80U) <Trouble Mode and Defective Board> Warning: Disconnect AC Power prior to Trouble Mode Defective Board making any disconnection or connection. Power Supply SOS Primarily P board or possible A board <How to find the defective boards>...

  • Page 12: Led Blinks 5 Times (Quick Troubleshooting)

    = The reference number of the sustain data Trouble Mode Defective Board connector is different in some of the models: TH-42PX80U = SS23 5V SOS P, C, SC, SS board or Panel (DDIC)*1 TH-50PX80U = SS23 <How to find the defective boards>...

  • Page 13: Led Blinks 5 Times

    LED blinks 5 times (TH-42PX80U) Trouble Mode Defective Board 5V SOS P, C, SC, SS board or Panel Disconnect CN SC20 on the SC board. Plug in the TV and turn it on Connect Does the CN SC20. Disconnect power...

  • Page 14: Led Blinks 6 Times

    = The reference number of the sustain data SC Energy Recovery SOS SC, A, P Board (SC >A> P ) connector is different in some of the models: TH-42PX80U = SS23 TH-50PX80U = SS23 (*2) CAUTION: Before connecting P2/SC2 or...

  • Page 15: Su/Sd Board Isolation Procedure

    SU/SD Board Isolation Procedure Unlike previous models of Panasonic Plasma TVs, the 2008 models are designed not to turn-on if either of the SU and SD boards is disconnected. Disconnecting either causes the unit to shutdown and the power LED to blink 7 times.

  • Page 16: Led Blinks 7 Times

    LED blinks 7 times (TH-42PX80U) Trouble Mode Defective Board (possibility) Physically disconnect the SU board and the SD board. (See instructions on slide 15). SC Floating voltage SOS SC, SU, SD, P board (SC,SU,SD>P) Plug in the TV and turn it on.

  • Page 17: Led Blinks 8 Times

    LED blinks 8 times Trouble Mode Defective Board (possibility) SS, A board (SS>,A)/PDP SS Energy recovery SOS/Panel Disconnect CN SS23 from the SS board. Plug in the TV and turn it on Does the P Board TV power up and stay on? A Board Is the anode...

  • Page 18: Led Blinks 9 Times

    LED blinks 9 times <Trouble Mode and Defective Board> Warning: Disconnect AC Power prior to Trouble Mode Defective Board making any disconnection or connection. Panel Status D Board <How to find the defective boards> Replace the A board.

  • Page 19: Led Blinks 10 Times Before Pressing The Power Button

    The power LED blinks 10 times at plug-in (TH-42PX80U) Trouble Mode Defective Board (Possibility) NOTE: When taking voltage reading, place your meter’s probe on the test point or pin indicated before connecting the TV to the AC line. The Dead/No power P, A, GS, K voltage you intent to measure may only appear for a brief moment.
  • Page 20 The power LED blinks 10 times at plug-in (TH-42PX80U) NOTE: When taking voltage reading, place your meter’s probe Warning: Disconnect AC Continue from the on the test point or pin indicated before connecting the TV to the Power prior to making any previous slide AC line.

  • Page 21: Led Blinks 10 Times After Pressing The Power Button

    LED blinks 10 times after pressing the power button (TH-42PX80U) Warning: Disconnect AC Power prior to making any Trouble Mode Defective Board disconnection or connection (*1) = The reference number of the sustain data SUB 5V SOS, Main 3.3V SOS...
  • Page 22 LED blinks 10 times before pressing the power button (TH-42PX80U) Warning: Disconnect AC Continue from the Continue from the previous slide (A) previous slide (B) Power prior to making any disconnection or connection. Unplug the TV and re-connect CN A52 on the A board (Do not connect CN A1 yet).

  • Page 23: Led Blinks 12 Times

    LED blinks 12 times Warning: Disconnect AC Power Trouble Mode Defective Board (Possibility) prior to making any disconnection Sound SOS Speakers, A Board or connection. Disconnect the Left and Right speakers connectors. Plug in the TV and turn it on Does the power LED stay on when the TV is...

  • Page 24: Led Blinks 13 Times

    LED blinks 13 times <Trouble Mode and Defective Board> Warning: Disconnect AC Power prior to Trouble Mode Defective Board making any disconnection or connection. Communication error with IC8001 A Board <How to find the defective boards> The A board is defective...

  • Page 25: Dead Part I

    No Power/Dead Unit Trouble Mode Defective Board (Possibility) Dead/No power P, A, GS, K Do the AC relays click after the TV is plugged into the AC line? Is there 5V at Place your meter pin 5 of connector A7/P7 on pin 11 of connector when the TV is plugged into A25 or P25.
  • Page 26 No Power/Dead Unit (Continue) Continue from Previous slide Unplug the TV and disconnect connector A1. Plug in there 3.3V at the TV. pin 6 of connector P7 when the TV is plugged into the AC line? Replace The P board Do the AC relays click after the TV is plugged into the AC line?

  • Page 27: No Picture From One Or All Inputs (Osd And Sound Ok)

    No Picture from one or all inputs (OSD and Sound OK) Warning: Disconnect AC Power prior to making any disconnection or Is there no connection. picture from all inputs? Note: Slow leakage from the panel causes “no raster and buzz noise” Disconnect Replace CN A5, Plug in the...

  • Page 28: No Picture\No Osd

    No Picture\No OSD Warning: Disconnect AC Power prior to making any disconnection or connection. Is the On Screen Display information visible? Unplug the TV from the wall outlet. Disconnect connector A5 from the A board. Replace Reconnect the TV and wait for it to come on by The A board itself.

  • Page 29: No Sound

    No Sound Warning: Disconnect AC Power prior to making any disconnection or connection. Is there 15V at pin 1 of CN A7 on the A board? Check the cable between connector A7 on the A board and P6 on the P board.
  • Page 30 This page is purposely left blank.

  • Page 31: Troubleshooting For Picture Problems

    Troubleshooting for Picture Problems...

  • Page 32: Diagnostic Method For Troubleshooting Pdp Television

    Diagnostic Method for Troubleshooting PDP Television <Introduction> 1. There are two kinds of picture problem 1) Abnormal picture 2) No picture 2. Basic concept of determining the defective board 1) Which area is the symptom displayed on the screen? A. Part of the screen B.

  • Page 33: Troubleshooting For Picture Trouble

    Troubleshooting for Picture Trouble <How to determine the defective board> Start Some part of the screen Upper half *Note :Panel gas leakage Where is the symptom SU Board (or A, or SC) displayed? Lower half Upper or Lower half (from front view) SD Board (or A, or SC) Both area SC Board (or A)

  • Page 34: Diagnosis For Picture Problem (All Over The Screen)

    (All Over the Screen) <Symptom> <Model> Abnormal Color, Vertical Line, Sync Error, Noise Picture All Models <Sample Picture> <Possible Cause> A Board, SC Board, SU Board, SD Board <Block Diagram> e.g. TH-42PX80U <Back side view> IC1100 IC9500 IC9900 MICRO PICTURE PLASMA AI PROCESSOR...
  • Page 35 Diagnosis for Picture Problem (All Over the Screen) <Diagnosis (2)> Sample of NG Waveform Confirm the waveform at “TPSC1” of the SC board <Result> <Result> Correct Waveform Waveform Waveform Here <Cause> <Cause> A Board defect SC,SU,SD Board defect Refer to “Diagnosis (3)” on next page TPSC1 <Back side view>...
  • Page 36 Diagnosis for Picture Problem (All Over the Screen) <Diagnosis (3)> Confirm the waveform at “TPSC1” after removing the SU or SD Board from the SC Board <Result> Situation Condition Condition 2 Cause Bottom half of SU Board Disconnect SU Board Waveform Picture OK? (Connect SD)

  • Page 37: Diagnosis Of Vertical Line Problem

    Diagnosis of Vertical Line Problem NG Area (Front view) case1 case2 Panel Thin vertical line A number of blocks not lighting or 1 block not lighting case1 case2 PDP panel (Driver IC) NG A board (or C board) NG ( or A board, or C board ) 1 Line 1 Block 2 Blocks...

  • Page 38: Picture Trouble At Upper Or Lower Half

    Picture Trouble at Upper or Lower half <Symptom> <Actual Symptom> No Picture, Picture noise, Full Horizontal line, etc. Symptom : Horizontal line (Lower side) Result : SD board <Models> 42 inch (HD Panel) <NG Area> (Front view) Symptom : Horizontal line (Upper side) Result : A board Symptom...

  • Page 39: Picture Trouble At Right Or Left Half (50 Inch)

    Picture Trouble at Right or Left half (50 Inch) <Symptom> <Symptom> <Actual Symptom> No Picture, Picture noise, etc. Symptom : Cyan noise (Right side) Result : A board <Models> 50inch (HD Panel) <NG Area> (Front view) <Defective board> Trouble at Right half : A-board defect Trouble at Left half : A-board defect...

  • Page 40: Picture Trouble At Right Or Left Half (42/37 Inch)

    Picture Trouble at Right or Left half (42 Inch) <Symptom> <Symptom> <Actual Symptom> No Picture, Picture noise, Full Vertical line, etc. Symptom : Vertical line Result : Panel 42 inch (HD Panel) <NG Area> (Front view) <Defective board> Trouble at Right half : A or C1 board (Panel) defect Trouble at Left half : A or C2 board (Panel) defect...

  • Page 41: Picture Trouble In 50 Inch Models

    Picture Trouble in 50 Inch Models <Symptom> <Symptom> No Picture, Picture noise, Half Vertical line, etc. <Models> 50inch (HD Panel) <NG Area> (Front view) <Defective board> 1 Trouble at Upper right : C1 board or Panel defect 2 Trouble at Upper middle : C2 board or Panel defect Trouble at Upper left : C3 board or Panel defect...

  • Page 42: Picture Trouble All Over The Screen

    Picture Trouble all Over the Screen <Symptom> <Symptom> <Actual Symptom> Picture noise, Full Vertical line, etc. Symptom : Vertical line (All over screen) Result : A board <Models> 42inch (HD Panel) <NG Area > (e.g. 42 inch Panel) (Front view) Symptom : White balance NG Result...

  • Page 43: Examples Of Symptoms And Remedies

    Examples of Symptoms and Remedies...
  • Page 44 Picture Problem (All over the screen) <Symptom> Noise Picture <Photo of Symptom> Model : 42 inch Result : A Board Model : 42 inch Model : 42 inch Result : A Board Result : A Board Model : 42 inch Model : 42 inch Model : 42 inch Result : A Board...
  • Page 45 Picture Problem (All over the screen) <Symptom> Vertical Line <Photo of Symptom> Model : 42 inch Model : 42 inch Model : 42 inch Result : A Board Result : A Board Result :A Board Model : 42 inch Model : 42 inch Model : 42 inch Result : A Board Result : A Board...
  • Page 46 Picture Problem (All over the screen) <Symptom> Abnormal Color, White Balance NG <Photo of Symptom> Model : 42 inch Model : 42 inch Model : 42 inch Result : A Board Result : A Board Result : A Board Yellow Magenta Magenta Model : 42 inch...
  • Page 47 Picture Problem (All over the screen) <Symptom> Sync Error <Photo of Symptom> Model : 42 inch Model : 42 inch Model : 42 inch Result : A Board Result : A Board Result : A Board Model : 42 inch Model : 42 inch Model : 42 inch Result : A Board...
  • Page 48 Picture Problem (Right half or Left half) <Symptom> Vertical Line <Photo of Symptom> Model : 50 inch Model : 42 inch Model : 42 inch Result : A Board Result : A Board Result : A Board Model : 42 inch Model : 42 inch Model : 42 inch Result : A Board...
  • Page 49 Picture Problem (Upper or Bottom) <Symptom> Vertical Line <Photo of Symptom> Model : 42 inch Model : 42 inch Model : 42 inch Result : A Board Result : A Board Result : A Board Model : 42 inch Model : 42 inch Model : 42 inch Result : SU Board Result : A Board...

  • Page 50: Self-Check Procedure

    Self-check Procedure NOTE: This procedure does CHASSIS: GPH11D All models not reset the TV Self-check Screen How to access the self-check screen to reset the unit. Select a television channel, and while pressing the [VOLUME ( - )] button on the main unit, press the [OK] button on the remote control for more than 3 seconds.

  • Page 51: Reset

    Reset Procedure CHASSIS: GPH11D All models To Reset the Unit, turn the TV on and while pressing the “VOLUME ( - )” button on the main unit, press the “Menu” button on the remote control for more than 3 seconds. The Self-Check menu appears on screen.

  • Page 52: Driver Setup Adjustment 52~53

    TH-42PX80U Driver Setup Adjustment Driver Setup Table Item / Preparation Input a white signal to plasma video input. Set the picture controls as follows. Picture menu: Vivid Normal: Set Aspect: Full Caution First perform Vsus adjustment. Confirm the voltage level of VSCN. This should be done after the adjustment of Vad which should be - 105V When Vad=-149V, Voltage of Vscn is -4V ±4V.
  • Page 53 TH-50PX80U Driver Setup Adjustment Driver Setup Table Item / Preparation Input a white signal to plasma video input. Set the picture controls as follows. Picture menu: Vivid Normal: Set Aspect: Full Caution First perform Vsus adjustment. Confirm the voltage level of VSCN. This should be done after the adjustment of Vad which should be - 105V When Vad=-149V, Voltage of Vscn is -4V ±4V.

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