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Panasonic TH-42PZ80U Technical Manual
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Panasonic TH-42PZ80U Technical Manual

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See also: Troubleshooting Manual , Service Manual
Technical Guide
Technical Guide
Model : TH-42PZ80U
TH-46PZ80U
TH-50PZ80U
TH-42PZ85U
TH-46PZ85U
TH-50PZ85U
TH-42PZ800U
TH-46PZ800U
TH-50PZ800U
TH-46PZ850U
TH-50PZ850U
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-42PZ80U

  • Page 1 Technical Guide Technical Guide Plasma Plasma (GPH11DU Chassis) (GPH11DU Chassis) HD Models HD Models Troubleshooting Handbook Troubleshooting Handbook Model : TH-42PZ80U TH-46PZ80U TH-50PZ80U TH-42PZ85U TH-46PZ85U TH-50PZ85U TH-42PZ800U TH-46PZ800U TH-50PZ800U TH-46PZ850U TH-50PZ850U 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) Power LED’s Response to Shutdown Operation No Sound LED blinks 1 time Troubleshooting for Picture Problems LED blinks 2 times 9-11 Diagnostic Method for Troubleshooting PDP Television LED blinks 3 times Troubleshooting for Picture Trouble LED blinks 4 times Diagnosis for Picture Problem (All Over the Screen)
  • 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-42PZ85U) Figure 1...
  • 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> Number of blinks Contents Check point Communication Error with Microcomputer D, A 15V SOS 3.3V SOS Power Supply SOS 5V SOS SC Energy recovery SOS SC, D, P SC floating voltage SOS SC, SU, SD, D, P SS Energy recovery SOS SS, D, P...

  • Page 8: Led Blinks 1 Time

    LED blinks 1 time Warning: Disconnect AC Power prior to Trouble Mode Defective Board making any disconnection or connection Communication Error D, GS, A TH-42PZ80/85/800U TH-46PZ850U TH-46PZ80/85/800U TH-50PZ850U A board Connectors Location TH-50PZ80/85/800U Disconnect A52 on the A Disconnect A9 on the A Board (See Figure 1).

  • Page 9: Led Blinks 2 Times

    LED blinks 2 times Trouble Mode Defective Board (Possibility) 2 Blinks Condition can be caused by: 15V down SOS P, A, SC, SS Board (P > A, SC, SS) • Missing P15V • A short of the P15V • Wrong diagnostic by the D board P15V Distribution Figure 3...
  • Page 10 LED blinks 2 times Trouble Mode Defective Board (Possibility) Warning: Disconnect AC Power prior to making any disconnection or connection 15V down SOS P, A, D, SC, SS, PB Board (P > A, SC, SS, PB) Unplug the TV and check the resistance between pin 1 of connector P7 and ground (Chassis) Unplug connectors P6, P7, P12, and P25 on the P Is there a...
  • Page 11 Continue from the Continue from the previous slide (A) previous slide (B) Reconnect P6 and measure the resistance between pin 1 of Is there a connector P7 and ground (Chassis short circuit? Replace Replace The D board The SC board Is there a short circuit?

  • Page 12: Led Blinks 3 Times

    LED blinks 3 times Warning: Disconnect AC Power prior to Trouble Mode Defective Board making any disconnection or connection 3.3V down SOS D Board Replace the D board...

  • Page 13: Led Blinks 4 Times

    LED blinks 4 times Warning: Disconnect AC Power prior to Trouble Mode Defective Board making any disconnection or connection Power Supply SOS Primarily P board followed by D board 4 blinks condition can be caused by: An abnormal increase in any of the voltages generated by the power supply (Vsus, Vda, P15V, P5V, STB5V) Turn the TV on.

  • Page 14: 5V Sos

    LED blinks 5 times Warning: Disconnect AC Power prior to making any Trouble Mode Defective Board disconnection or connection 5V SOS P, D, Cs, SC, SD, SS, D board or Panel 5 blinks condition can be caused by: • Missing P5V •...

  • Page 15: Led Blinks 5 Times (Quick Troubleshooting)

    LED blinks 5 times (Quick Troubleshooting) Warning: Disconnect AC Power prior to making any Trouble Mode Defective Board disconnection or connection 5V SOS P, D, Cs, SC, SS, D board or Panel Disconnect the TV. Measure the resistance between pin 1 of connector P12 on the P board and ground (Chassis).

  • Page 16: Led Blinks 5 Times

    LED blinks 5 times Warning: Disconnect AC Power prior to making any Trouble Mode Defective Board disconnection or connection 5V SOS P, C, SC, SS,SD, D board or Panel Use a volt-meter and place the positive probe on pin 5 of connector P25 on the P board while the negative probe is grounded.
  • Page 17 LED blinks 5 times Continue from the previous slide (A) Reconnect SS33 and disconnect D31, D32, and D33 on the D board (To get to this connectors, remove the A Board Block Assembly). Measure the resistance between pin 5 of connector P25 on the P board and ground (Chassis).
  • Page 18 LED blinks 5 times Continue from the previous slide (B) Reconnect D31 only. Measure the resistance between pin 5 of connector P25 on the P board and ground (Chassis). Disconnect the Flex cables between the Reconnect D32 and D33 and disconnect C26 on the C2 panel and the C1 board board.

  • Page 19: Led Blinks 6 Times

    LED blinks 6 times Warning: Disconnect AC Power prior to making any Trouble Mode Defective Board (Possibility) disconnection or connection (*2) CAUTION: Before connecting P2/SC2 or SC Energy Recovery SOS SC, P Board (SC >D> P ) P11/SS11, discharge is necessary to prevent potential shock caused by VSUS.

  • Page 20: 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 21: Led Blinks 7 Times

    LED blinks 7 times Trouble Mode Defective Board (possibility) Physically disconnect the SU board and the SD board. (See instructions on previous SC Floating voltage SOS SC, SU, SD, D, P board (SC,SU,SD>P) slide). Plug in the TV and turn it on. Make sure connectors P2/SC2, SC20/D20 are not loose and are seated properly.
  • Page 22 D16280 (D280) Location Note: The location for this component may not be the same for all models PANEL N 2.7V SOS To pin 66 IC9003 TH-42PZ85U Figure 8 Anode D16280 (D280) Figure 10 Figure 9...

  • Page 23: Led Blinks 8 Times

    LED blinks 8 times Warning: Disconnect AC Power prior to making any Trouble Mode Defective Board (possibility) disconnection or connection SS, D board (SS>,D)/PDP SS Energy recovery SOS/Panel Disconnect connector SS33 from the SS board. Plug in the TV and turn it on Does the TV power up and...

  • Page 24: Led Blinks 9 Times

    LED blinks 9 times Warning: Disconnect AC Power prior to making any Trouble Mode Defective Board disconnection or connection Panel Status D Board Replace the D board.
  • Page 25 The power LED blinks 10 times at plug-in Trouble Mode Defective Board (Possibility) 10 blinks condition can be caused by: • Missing/Shorted F_STB_15V Dead/No power P, A, GS, K, GH • Missing/Shorted SUB9V, SUB5V, and SUB3.3V • Wrong diagnostic by the A board Sub-Voltages Distribution Diagram A board Connectors Location Figure 11...
  • Page 26 The power LED blinks 10 times at plug-in NOTE: When taking voltage reading, place your meter’s probe on the test point or pin Trouble Mode Defective Board (Possibility) indicated before connecting the TV to the AC line. The voltage you intent to measure may only appear for a brief moment.

  • Page 27: Led Blinks 10 Times At Plug-In

    The power LED blinks 10 times at plug-in NOTE: When taking voltage reading, place your meter’s probe Continue from the on the test point or pin indicated before connecting the TV to the previous slide AC line. The voltage you intent to measure may only appear for a brief moment.

  • Page 28: Led Blinks 10 Times After Pressing The Power Button

    LED blinks 10 times after pressing the power button Warning: Disconnect AC Power prior to making any Trouble Mode Defective Board disconnection or connection (*2) CAUTION: Before connecting P2/SC2 or SUB 5V SOS, Main 3.3V SOS P, A, SC,SS, GS, G Board P11/SS11, discharge is necessary to prevent DTV 9V SOS, Tuner Power SOS potential shock caused by VSUS.

  • Page 29: Led Blinks 11 Times

    LED blinks 11 times Warning: Disconnect AC Power prior to making any Trouble Mode Defective Board (Possibility) disconnection or connection Fan SOS Fans, PB, A Board Fan SOS Circuit 11 blinks condition happens: If one of the fans opens or increases resistance.

  • Page 30: Fan Sos

    LED blinks 11 times Warning: Disconnect AC Power prior to Trouble Mode Defective Board (Possibility) making any disconnection or connection Fan SOS Fans, PB, A Board Caution (*5) When a fans is disconnected, place a jumper between pins 2 and 3 of the connector that the fan was removed from.

  • Page 31: Led Blinks 12 Times

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

  • Page 32: Led Blinks 13 Times

    LED blinks 13 times Trouble Mode Defective Board Warning: Disconnect AC Power prior to making any disconnection or connection Communication error with IC8001 A Board TH-42PZ80/85/800U TH-46PZ850U TH-46PZ80/85/800U TH-50PZ850U TH-50PZ80/85/800U A board Connectors Location Disconnect A52 on the A Disconnect A9 on the A Board (See Figure 1).

  • Page 33: No Power / Dead

    No Power/Dead Unit Warning: Disconnect AC Power prior to making any Trouble Mode Defective Board (Possibility) disconnection or connection Dead/No power P, A, GS, K Unplug the TV and place your Do the AC relays volt-meter on pin 5 of click after the TV is plugged connector P7.

  • Page 34: No Power / Dead

    No Power/Dead Unit (Continue) Continue from Unplug the TV and place your Previous slide volt-meter on pin 6 of connector P7. Plug in the TV. Unplug the TV and there 3.2Vor 2.7V at disconnect pin 6 of connector P7 when the connector A1.

  • Page 35: No Sound

    No Sound Warning: Disconnect AC Power prior to making any disconnection or connection Is there 15V at pin 1 of CN A6 on the A board? Check the cable between connector A7 on the A board and P6 on the P board.
  • Page 36 This page is purposely left blank.

  • Page 37: Troubleshooting For Picture Problems

    Troubleshooting for Picture Problems...

  • Page 38: 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 39: 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 D, or SC) displayed? Lower half Upper or Lower half (from front view) SD Board (or D, or SC) Both area SC Board (or D)

  • Page 40: 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> D Board, SC Board, SU Board, SD Board <Block Diagram> e.g. TH-42PZ80U <Back side view> IC1100 IC9500 IC9900 MICRO PICTURE PLASMA AI PROCESSOR...
  • Page 41 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> D Board defect SC,SU,SD Board defect Refer to “Diagnosis (3)” on next page TPSC1 <Back side view>...
  • Page 42 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 43: 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 D board (or C board) NG ( or D board, or C board ) 1 Line 1 Block 2 Blocks...

  • Page 44: 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 : D board Symptom...

  • Page 45: 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 : D board <Models> 50inch (HD Panel) <NG Area> (Front view) <Defective board> Trouble at Right half : D-board defect Trouble at Left half : D-board defect...

  • Page 46: 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 : D or C1 board (Panel) defect Trouble at Left half : D or C2 board (Panel) defect...

  • Page 47: 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 48: 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 : D board <Models> 42inch (HD Panel) <NG Area > (e.g. 42 inch Panel) (Front view) Symptom : White balance NG Result...

  • Page 49: Examples Of Symptoms And Remedies

    Examples of Symptoms and Remedies...
  • Page 50 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 : D Board Result : D Board Model : 42 inch Model : 42 inch Model : 42 inch Result : A Board...
  • Page 51 Picture Problem (All over the screen) <Symptom> Vertical Line <Photo of Symptom> Model : 42 inch Model : 42 inch Model : 42 inch Result : D Board Result : D Board Result :D Board Model : 42 inch Model : 42 inch Model : 42 inch Result : D Board Result : D Board...
  • Page 52 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 : D Board Result : D Board Result : D Board Yellow Magenta Magenta Model : 42 inch...
  • Page 53 Picture Problem (All over the screen) <Symptom> Sync Error <Photo of Symptom> Model : 42 inch Model : 42 inch Model : 42 inch Result : D Board Result : D Board Result : D Board Model : 42 inch Model : 42 inch Model : 42 inch Result : D Board...
  • Page 54 Picture Problem (Right half or Left half) <Symptom> Vertical Line <Photo of Symptom> Model : 50 inch Model : 42 inch Model : 42 inch Result : D Board Result : D Board Result : D Board Model : 42 inch Model : 42 inch Model : 42 inch Result : D Board...
  • Page 55 Picture Problem (Upper or Bottom) <Symptom> Vertical Line <Photo of Symptom> Model : 42 inch Model : 42 inch Model : 42 inch Result : D Board Result : D Board Result : D Board Model : 42 inch Model : 42 inch Model : 42 inch Result : SU Board Result : D Board...

  • Page 56: 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 57: 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.

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