Technical GuidePlasma (GPH11DU Chassis) HD Models Troubleshooting Handbook Model : TH-42PX80U TH-50PX80U Panasonic Technology and Service Company National Training This page is purposely left blank. 2 Table of Contents Subject Connector’s Location (TH-42PX80U) Power LED’s Response to Shutdown Operation LED blinks 1 time LED blinks 2 times LED blinks 3 times LED blinks 4 times LED blinks 5 times (Quick Troubleshooting) LED blinks 5 times LED blinks 6 times SU/SD Board Isolation Procedure LED blinks 7 times LED blinks 8 times LED blinks 9 times LED blinks 10 times before pressing the power button LED blinks 10 times after pressing the power button LED blinks 12 times LED blinks 13 times Dead part I No Picture from one or all inputs (OSD and Sound OK) Page 5 7 8 9 10 11 12 13 14 15 16 17 18 19-20 21-22 23 24 25-26 27 Subject No Picture\No OSD No Sound Troubleshooting for Picture Problems Diagnostic Method for Troubleshooting PDP Television Troubleshooting for Picture Trouble Diagnosis for Picture Problem (All Over the Screen) Diagnosis of Vertical Line Problem Picture Trouble at Upper or Lower half Picture Trouble at Right or Left half (50 Inch) Picture Trouble at Right or Left half (42/37 Inch) Picture Trouble in 50 Inch Models Picture Trouble all Over the Screen Examples of Symptoms and Remedies Self-check Procedure Reset Driver Setup Adjustment Page 28 29 31 32 33 34~36 37 38 39 40 41 42 44~49 50 51 52~53 3 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. (*) “Power comes up” equals “no shutdown”. 2. Troubleshooting Video and Audio problems 3. Examples of video problems 4. Adjustment after PCB exchange 1) After exchanging the following boards, voltage adjustment is required. P board, SC board, SS board => Please refer to the “Service Manual”. 4 Connector’s Location (TH-42PX80U) 5 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. SD Board (SC Energy recovery circuit) C and A Boards Connections SC.SU.Power LED’s Response to Shutdown Operation Once <LED Blinking timing> 3.SU.SD Board (SC Floating voltage area) SS Board (SS Energy recovery circuit)/Panel A Board (Panel Status DET) A Board (A SOS.3V SOS) P Board (Power SOS) A Board (5V SOS) SC. Tuner SOS)/SC/SS A Board (Sound SOS). C boards connections A Board <Check point> LED Blinking times 1 2 3 4 5 6 7 8 9 10 12 13 STB5V sense time out 15V line abnormality 3.0sec (interval) Light No Light Contents Check Point A Board A Board (15V SOS) A Board (3.3V line abnormality Power Supply abnormality 5V line abnormality Scan Driver (1) abnormality/DRV_RST Scan Driver (2) abnormality Sustain Driver abnormality Panel Status abnormality REG. voltage abnormality Voltage for sound abnormality Communication error with IC8001 7 . Disconnect GS52 on the SD Card Slot Board (GS board ) (See Figure 1). Plug in the TV and turn it on No Is the power LED still blinking? Yes Replace the GS board Replace the A board Figure 1 8 .LED blinks 1 time <Trouble Mode and Defective Board> Trouble Mode Communication Error Defective Board A. GS Warning: Disconnect AC Power prior to making any disconnection or connection. Turn the TV on. SS34. SC. reconnect SC20 and (*2) SC2 and disconnect CN P12 from the P board and SS11 and SS23 (*1) from the SS board to isolate the SS board. Remove the jumper at CN SS34 and install it across pin 8 and 10 of connector P12. Yes SC Board Does the power LED stay on? No Is there 15V output at CN P25 pin 1 or 2 before the TV shuts down ? Yes Unplug the TV. discharge is necessary to prevent potential shock caused by VSUS. Re-connect the TV and turn the power on. Yes Yes Does the power LED stay on? No A Board P Board Is pin 1 or 2 No of the CN Is pin 1 or 2 of the CN P25 P25 shorted shorted to GND? to GND? SS Board A Board Note: CN = Connector 9 . Plug in the TV and turn the power on. SC.LED blinks 2 times <Trouble Mode and Defective Board> Trouble Mode 15V down SOS Defective Board (Possibility) P. To isolate the SC board. Unplug the TV and disconnect CN SC20 and SC2. Re-connect CN P12. SS Board (P > A. SS) Warning: Disconnect AC Power prior to making any disconnection or connection (*1) = The reference number of the sustain data connector is different in some of the models: TH-42PX80U = SS23 TH-50PX80U = SS23 (*2) CAUTION: Before connecting P2/SC2 or P11/SS11. No Unplug the TV. SS11. Unplug the TV. A. Disconnect CN P25. and SS23 (*1). 3V down SOS Defective Board A Board Warning: Disconnect AC Power prior to making any disconnection or connection.LED blinks 3 times <Trouble Mode and Defective Board> Trouble Mode 3. <How to find the defective boards> Replace the A board Note: CN = Connector 10 . Yes P Board Is pin 12 of CN P25 on the P board high before the TV shuts down? No A Board Note: CN = Connector 11 .LED blinks 4 times (TH-42PX80U) <Trouble Mode and Defective Board> Trouble Mode Power Supply SOS Defective Board Primarily P board or possible A board Warning: Disconnect AC Power prior to making any disconnection or connection. <How to find the defective boards> Turn the TV on. Measure the resistance of pin 1 of the lead cable to ground. <How to find the defective boards> Disconnect CN P12 of the power supply board. discharge is necessary to prevent potential shock caused by VSUS. SC. SS board or Panel (DDIC)*1 Warning: Disconnect AC Power prior to making any disconnection or connection (*1) = The reference number of the sustain data connector is different in some of the models: TH-42PX80U = SS23 TH-50PX80U = SS23 (*2) CAUTION: Before connecting P2/SC2 or P11/SS11.LED blinks 5 times (Quick Troubleshooting) <Trouble Mode and Defective Board> Trouble Mode 5V SOS Defective Board P. C. Yes Panel Is there a short to ground? No Proceed to more extensive troubleshooting of the slides that follow. Note: CN = Connector 12 . With the TV disconnected measure continuity between pin 5 of CN P25 and GND Yes Is pin 5 of CN P25 shorted to GND? No Disconnect A31 and connect A32. SC. Disconnect CB5~CCB8 Is pin 5 of CN P25 shorted to GND? No P Board Yes Yes Is pin 5 of the socket P25 shorted to GND? No Is pin 5 of CN P25 shorted to GND? No Yes Is pin 5 of CN P25 shorted to GND? No P Board A Board C1 Board Panel C2 Board Panel Note: CN = Connector 13 . Yes Disconnect CN P25. SS board or Panel Disconnect CN SC20 on the SC board. Disconnect CN SS23 (*1) on the SS board. Connect SS23 (*1). Yes Does the power LED stay on? No Does the power LED stay on? No SC Board Yes Does the power LED stay on? No Is pin 5 of CN P25 shorted to GND? Yes SD Board (See SD board Isolation procedure on slide 15) No Connect A31 and leave A32 disconnected. Plug in the TV and turn it on Yes SS Board Connect SC20 and disconnect CN SC46. Plug in the TV and turn it on Connect CN SC20. Disconnect CB1-CB4. Disconnect CN 31and A32 on the A board. C.LED blinks 5 times (TH-42PX80U) Trouble Mode 5V SOS Defective Board P. P Board (SC >A> P ) Warning: Disconnect AC Power prior to making any disconnection or connection (*1) = The reference number of the sustain data connector is different in some of the models: TH-42PX80U = SS23 TH-50PX80U = SS23 (*2) CAUTION: Before connecting P2/SC2 or P11/SS11.LED blinks 6 times Trouble Mode SC Energy Recovery SOS Defective Board (Possibility) SC. The unit will not enter the standby mode without the jumper. and SC20 from the SC board. discharge is necessary to prevent potential shock caused by VSUS. If problem persists. SC Board Yes Does the P board output 15V at pin 1 of P7 and Vsus at pin 1 of CN P2 before the TV shuts down? No P Board Clean and reseat the ribbon cables between the A and the C boards. replace the A board Note: CN = Connector 14 . Also reseat the cables between the C boards. (*3) VSUS about 180V (Accurate voltage is provided on the Panel Label) (*4) Place a jumper across pin 8 and 10 of connector P12. A. Plug in the TV and turn it on. Disconnect connectors SC2. Yes Does the TV power up and stay on? No Connect SC2 (*2) and SC20. Plug in the TV and turn it on. Confirm proper connection by measuring continuity between floating ground and chassis ground. DANGER) on the SU board or SD board and coil L801 on the SC board. The jumper can be connected to the floating ground screws on the SU board. see figure 2. Procedure to isolate the SU/SD board For SU board: Disconnect connectors SC41/SU41. Place a jumper between “VF Ground” (labeled H. SU11/SD11. and SU11/SD11. Disconnecting either causes the unit to shutdown and the power LED to blink 7 times.V.SU/SD Board Isolation Procedure Unlike previous models of Panasonic Plasma TVs. Caution: Before turning the unit on. Isolating the SU/SD board does not require the removal of its mounting screws. which are located above and below connector SU41. confirm that the jumper is not connected to a chassis ground screw. see figure 2 and 3. the 2008 models are designed not to turn-on if either of the SU and SD boards is disconnected. SC46/SD46. Figure 2 Figure 3 15 . as this will cause severe damage to the unit. The resistance should be in the kilo-ohms range. For SD board: Disconnect connectors SC42/SD42. (See instructions on slide 15). Disconnect the SD board and reconnect the SU board. Plug in the TV and turn it on. Reconnect the SD board only. Replace the A board. Replace the SD. remove connectors SC2 and SC20 from the SC board Plug in the TV and turn it on.SU. No Does the TV shut down and the power LED blink 7 times? Yes Replace the SD board. No Yes No Does the TV shut down and the power LED blink 7 times? Yes No Does the TV shut down and the power LED blink 7 times? Yes Replace the SU board. Plug in the TV and turn it on. Does the TV shut down and the power LED blink 7 times? With the SU board and the SD board still disconnected. (See instructions on slide 15). Make sure the connectors P2/SC2. (See instructions on slide 15). Plug in the TV and turn it on. Replace the SC board.SD>P) Physically disconnect the SU board and the SD board.LED blinks 7 times (TH-42PX80U) Trouble Mode SC Floating voltage SOS Defective Board (possibility) SC. P board (SC. SC20/D20 are not loose and are seated properly. SU. 16 . SD. and SU board. LED blinks 8 times Trouble Mode SS Energy recovery SOS/Panel Disconnect CN SS23 from the SS board.A)/PDP Yes Does the TV power up and stay on? No No P Board A Board Yes Is the anode of D280 on the SS board high? No Panel SS Board Figure 4 17 . A board (SS>. Plug in the TV and turn it on Defective Board (possibility) SS. LED blinks 9 times <Trouble Mode and Defective Board> Trouble Mode Panel Status Defective Board D Board Warning: Disconnect AC Power prior to making any disconnection or connection. 18 . <How to find the defective boards> Replace the A board. A. NO Reconnect A1 and disconnect connector A51on the A board. Do the AC relays click after the TV is plugged into the AC line? Replace The P board Yes If cable between connectors K1 and A1 is OK. place your meter’s probe on the test point or pin indicated before connecting the TV to the AC line. Warning: Disconnect AC Power prior to making any disconnection or connection. NO NO Do the AC relays click after the TV is plugged into the AC line? Yes Is there 3. GS. K NOTE: When taking voltage reading. Do the AC relays click after the TV is plugged into the AC line? Yes Replace The A board If cable between connectors GS52 and A51 is OK. The voltage you intent to measure may only appear for a brief moment.2V at pin 6 of connector P7 when the TV is plugged into the AC line? Yes NO Disconnect connector A1 on the A board. Go to the Next slide 19 .The power LED blinks 10 times at plug-in (TH-42PX80U) Trouble Mode Dead/No power Defective Board (Possibility) P. Replace the K board. Replace the GS board. Warning: Disconnect AC Power prior to making any disconnection or connection. No Does the TV shut down? Yes Replace The P board Replace The A board Reconnect connector A1 and disconnect connector A51on the A board. Plug in the TV No Is there 15V at pin 7 of connector P6/A7 when the TV is plugged into the AC line? Yes Replace the K board.The power LED blinks 10 times at plug-in (TH-42PX80U) NOTE: When taking voltage reading. The voltage you intent to measure may only appear for a brief moment. Plug in the TV No Replace the GS board. Continue from the previous slide Disconnect connector P6 on the P board. Plug in the TV No Is there 15V at pin 7 of connector P6/A7 when the TV is plugged into the AC line? Yes Disconnect connector A1 on the A board. place your meter’s probe on the test point or pin indicated before connecting the TV to the AC line. Does the power LED still blink 10 times? Yes Replace The A board 20 . Disconnect CN SS11(*2). Plug in the TV and turn it on. Main 3. The unit will not enter the standby mode without the jumper. Defective Board P. Plug in the TV and turn it on.LED blinks 10 times after pressing the power button (TH-42PX80U) Trouble Mode SUB 5V SOS. GS. SS23 and CN SS34 on the SS board and CN P12 on the P board. (*3) VSUS about 180V (Accurate voltage is provided on the Panel Label) (*4) Place a jumper across pin 8 and 10 of connector P12. Install the jumper from SS34 between pin 8 and 10 of CN P12.SS. and SS34 on the SS board and CN P12 of the P board. No Does the unit shut down and the power LED blinks 10 times? Yes Replace The SC board Unplug the TV and re-connect CN SC2(*2). Unplug the TV and re-connect CN SS11 (*2). Disconnect CN A51 and A52 on the A board.3V SOS DTV 9V SOS. A. SS23. and SC20 on the SC board. G Board Warning: Disconnect AC Power prior to making any disconnection or connection (*1) = The reference number of the sustain data connector is different in some of the models: TH-42PX80U = SS23 TH-50PX80U = SS23 (*2) CAUTION: Before connecting P2/SC2 or P11/SS11. Tuner Power SOS Disconnect connectors SC2 and SC20 on the Scan (SC) board. discharge is necessary to prevent potential shock caused by VSUS. SC. No Does the power LED stay on when the TV is turned on? Yes Replace The SS board No Go to the Next slide (A) Yes Does the power LED stay on when the TV is turned on? Go to the Next slide (B) Note: CN = Connector 21 . Plug in the TV and turn it on. No No Are any of these voltages missing? Does the power LED stay on when the TV is turned on? Yes Yes Replace The GS board Replace The G board Replace The A board Replace The P board Warning: Disconnect AC Power prior to making any disconnection or connection (*1) = The reference number of the sustain data connector is different in some of the models: TH-42PX80U = SS23 TH-50PX80U = SS23 (*2) CAUTION: Before connecting P2/SC2 or P11/SS11. Note: CN = Connector 22 . Continue from the previous slide (B) Unplug the TV and re-connect CN A52 and A1 on the A board. (*5) = When measuring Vsus and Vda. This way. The unit will not enter the standby mode without the jumper. discharge is necessary to prevent potential shock caused by VSUS. Plug in the TV and turn it on. make sure to place the meter’s probe on the pin indicated before turning the TV on.LED blinks 10 times before pressing the power button (TH-42PX80U) Continue from the previous slide (A) Warning: Disconnect AC Power prior to making any disconnection or connection. 75V) at pin 1 of CN P12. Plug in the TV and turn it on. (*3) Make adjustments according to the value provided on the label normally found above the SC board or the SS board (*4) Place a jumper across pin 8 and 10 of connector P12. (*5) Measure Vsus (*3) at pin 1 of CN P11 and Vda (Approx. Unplug the TV and re-connect CN A52 on the A board (Do not connect CN A1 yet). a voltage reading can be obtained before the TV shuts down. LED blinks 12 times Trouble Mode Sound SOS Defective Board (Possibility) Speakers. If the speakers and the wires are ok. A Board Warning: Disconnect AC Power prior to making any disconnection or connection. check P15V (Pin 1 of P25) and follow 2 blinks instructions 23 . Disconnect the Left and Right speakers connectors. Plug in the TV and turn it on No Does the power LED stay on when the TV is turned on? Yes Replace The A board Check the speakers and the speaker’s wires. LED blinks 13 times <Trouble Mode and Defective Board> Trouble Mode Communication error with IC8001 Defective Board A Board Warning: Disconnect AC Power prior to making any disconnection or connection. <How to find the defective boards> The A board is defective 24 . 5V to 0V when the power button is pressed? Yes Go to the Next slide Replace The P board Replace The A board If wiring connections are ok. Place your meter on pin 11 of connector A25 or P25. GS. Replace The A board Replace The P board 25 . replace the SS board. check the S & K boards. If jumper on connector SS34 is present. A. Place your meter on pin 5 of connector P7. NO NO Is there 5V when the TV is plugged in? Yes Does pin 6 of connector A1 momentarily go from 4. Also check for missing jumper on CN SS34 on the SS board.No Power/Dead Unit Trouble Mode Dead/No power Defective Board (Possibility) P.2V when the power button is pressed? Yes Unplug the TV and disconnect connector A7. K NO Do the AC relays click after the TV is plugged into the AC line? Yes Yes Is there 5V at pin 5 of connector A7/P7 when the TV is plugged into the AC line? NO Unplug the TV Check connection between P12 and SS12. Plug in the TV and turn it on. Yes Is there Yescontinuity between pins 8 and 10 of connector P12 of the P board? NO NO Is there 3. Plug in the TV. NO Is there 3. NO Do the AC relays click after the TV is plugged into the AC line? Yes Replace The A board If the cable between connectors GS52 and A52 is OK. Plug in the TV.3V at pin 6 of connector P7 when the TV is plugged into the AC line? Yes Replace The P board NO Do the AC relays click after the TV is plugged into the AC line? Yes Reconnect A1 and disconnect connector A52.No Power/Dead Unit (Continue) Continue from Previous slide Unplug the TV and disconnect connector A1. 26 . If the cable between connectors K1 and A1 is OK. Replace the GS board. Replace the K board. Note: Slow leakage from the panel causes “no raster and buzz noise” Disconnect CN A5. Is there a picture at the upper half of the screen?. 27 . Disconnect Yes No the SD Board from the SC board. Is there a picture at the lower half of the screen? Connect the SU board. Turn the unit on. Plug in the TV and turn it on Replace The A board Yes Does a white picture appears? No Disconnect the SU Board from the No Yes SC board. No Turn the unit on. Replace The A board Replace The SU board Replace The SD board SC and possibly Panel.No Picture from one or all inputs (OSD and Sound OK) Yes Is there no picture from all inputs? No Warning: Disconnect AC Power prior to making any disconnection or connection. Disconnect connector A5 from the A board. Replace The A board Unplug the TV from the wall outlet.No Picture\No OSD Yes Is the On Screen Display information visible? No Warning: Disconnect AC Power prior to making any disconnection or connection. No Yes Is there 75V (VDA) at pins 1 and 2 of the connector SS12? No Is the screen completely white? Yes Replace The A board No Is the SC Board LED illuminated? Yes Replace The P board No Is the SS Board LED illuminated? Yes Replace The SC board Replace The SS board Replace The A board Note: CN = Connector 28 . Reconnect the TV and wait for it to come on by itself. No Is there 15V at pin 1 of CN A7 on the A board? Yes Check the cable between connector A7 on the A board and P6 on the P board. Yes Is there a sound waveform at pin 1 and 3 of CN A12 on the A board? No Check the speakers.No Sound Warning: Disconnect AC Power prior to making any disconnection or connection. Replace The A board Note: CN = Connector 29 . (Make sure A12 is properly seated). This page is purposely left blank. 30 . Troubleshooting for Picture Problems 31 . Part of the screen B. 32 . voltage adjustment is required.Diagnostic Method for Troubleshooting PDP Television <Introduction> 1. SS board => Please refer to “Service Manual”. Adjustment after PCB exchange 1) After exchanging the following boards. All over the screen 3. P board. Basic concept of determining the defective board 1) Which area is the symptom displayed on the screen? A. SC board. There are two kinds of picture problem 1) Abnormal picture 2) No picture 2. Finally.Troubleshooting for Picture Trouble <How to determine the defective board> Start Where is the symptom displayed? Upper or Lower half (from front view) Some part of the screen Upper half SU Board (or A. In this picture. or SC) Both area SC Board (or A) Right half Because of a very small crack in the panel. or Panel) 33 . gas leakage will start. gas leakage will lead to the symptom “No picture with buzz noise”. *Note :Panel gas leakage Left or Right half (from front view) A Board (or C1. gas leakage started at the left top corner. or SC) Lower half SD Board (or A. or Panel) Left half A Board (or C2. TH-42PX80U SC SU SS IC1100 SD <Back side view> A IC9500 PICTURE OUTPUT LVDS RECEIVER DISCHARGE CONTROL IC9900 PLASMA AI Buffer IC Buffer IC MICRO PROCESSOR IC4510 HDMI I/F Peaks Lite IC8001 LVDS S. Noise Picture <Model> All Models <Sample Picture> <Possible Cause> A Board.g.Diagnosis for Picture Problem (All Over the Screen) <Symptom> Abnormal Color.F. SD Board <Block Diagram> e. Sync Error. PROCESSOR DATA DRIVER Video DATA (R) Video DATA (L) Scan Control Pulse Sustain Control Pulse 34 . Vertical Line. SC Board. SU Board. SD Board defect Refer to “Diagnosis (3)” on next page TPSC1 SC SU SS <Back side view> IC9500 PICTURE OUTPUT LVDS RECEIVER DISCHARGE CONTROL IC9900 PLASMA AI Video DATA (R) S.Diagnosis for Picture Problem (All Over the Screen) <Diagnosis (2)> Confirm the waveform at “TPSC1” of the SC board Sample of NG Waveform <Result> Waveform OK Correct Waveform <Result> Waveform NG Here <Cause> A Board defect <Cause> SC. PROCESSOR DATA DRIVER Video DATA (L) Buffer IC Buffer IC A SD Scan Control Pulse Sustain Control Pulse <Defective Area> Up to SC Board 35 Panel Drive Circuit .SU.F. 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 Disconnect SU Board (Connect SD) Condition Waveform OK? Waveform OK? Waveform OK? Condition 2 Cause Bottom half of SU Board Picture OK? Upper half of SD Board Picture OK? Screen should SC Board be black SS Disconnect SD Board (Connect SU) Disconnect the SU and SD Boards SC SU Correct Waveform TPSC1 SD <Back side view> Buffer IC Buffer IC 36 . Diagnosis of Vertical Line Problem NG Area (Front view) Panel case1 case2 case1 Thin vertical line or 1 block not lighting case2 A number of blocks not lighting PDP panel (Driver IC) NG ( or A board. or C board ) IC IC IC IC A board (or C board) NG 2 Blocks 1 Line 1 Block Buffer Buffer IC C2 Buffer Buffer IC C1 C1 PDP Panel D-board ( or C-board) PDP Panel Driver IC Drive IC(2) inside C Board Buffer Driver IC FPC Driver IC Driver IC FPC C Board Buffer or A Board A board 37 . Full Horizontal line. Picture noise.Picture Trouble at Upper or Lower half <Symptom> No Picture. <Models> 42 inch (HD Panel) <NG Area> (Front view) Symptom : Horizontal line (Upper side) Result : A board <Actual Symptom> Symptom : Horizontal line (Lower side) Result : SD board 1 SS SU SC 2 C2 C1 SD A Symptom : Horizontal line (Both area) Result : SS board <Defective board> 1 Trouble at Upper half : SU-board (SC or A) defect 2 Trouble at Lower half : SD-board (SC or A) defect (*) Full Horizontal line at both area : SS-board (A) defect 38 . etc. etc. <Models> 50inch (HD Panel) <NG Area> (Front view) SS2 SU SS SS3 C3 C2 C1 <Actual Symptom> Symptom : Cyan noise (Right side) Result : A board 2 1 SD SC A <Defective board> 1 Trouble at Right half : A-board defect 2 Trouble at Left half : A-board defect 39 . Picture noise.Picture Trouble at Right or Left half (50 Inch) <Symptom> No Picture. 42 inch (HD Panel) <NG Area> (Front view) SU SS <Actual Symptom> Symptom : Vertical line Result : Panel 2 1 SD SC A C2 <Defective board> C1 1 Trouble at Right half : A or C1 board (Panel) defect 2 Trouble at Left half : A or C2 board (Panel) defect 40 . etc.Picture Trouble at Right or Left half (42 Inch) <Symptom> No Picture. Picture noise. Full Vertical line. etc. Picture noise.Picture Trouble in 50 Inch Models <Symptom> No Picture. Half Vertical line. <Models> 50inch (HD Panel) <NG Area> (Front view) SS2 SU SS SS3 C3 C2 C1 <Defective board> 1 Trouble at Upper right : C1 board or Panel defect 3 2 1 SD SC A 2 Trouble at Upper middle : C2 board or Panel defect 3 Trouble at Upper left : C3 board or Panel defect 41 . etc. Full Vertical line.g.Picture Trouble all Over the Screen <Symptom> Picture noise. 42 inch Panel)> (Front view) SU SS Symptom : White balance NG Result : A board <Actual Symptom> Symptom : Vertical line (All over screen) Result : A board 1 SD C2 C1 SC A Symptom : Abnormal Picture Result : SC board <Defective board> 1 Trouble at All area : A or SC board (SU. <Models> 42inch (HD Panel) <NG Area (e.SD) defect 42 . Examples of Symptoms and Remedies 43 . Picture Problem (All over the screen) <Symptom> Noise Picture <Photo of Symptom> Model : 42 inch Result : A Board Model : 42 inch Result : A Board Model : 42 inch Result : A Board Model : 42 inch Result : A Board Model : 42 inch Result : SC Board Model : 42 inch Result : SC Board Model : 42 inch Result : SC Board Model : 42 inch Result : SC Board Model : 42 inch Result : SC Board 44 . Picture Problem (All over the screen) <Symptom> Vertical Line <Photo of Symptom> Model : 42 inch Result : A Board Model : 42 inch Result :A Board Model : 42 inch Result : A Board Model : 42 inch Result : A Board Model : 42 inch Result : A Board Model : 42 inch Result : A Board Model : 42 inch Result : SC Board Model : 42 inch Result : SD Board Model : 42 inch Result : SD Board 45 . Picture Problem (All over the screen) <Symptom> Abnormal Color. White Balance NG <Photo of Symptom> Model : 42 inch Result : A Board Model : 42 inch Result : A Board Model : 42 inch Result : A Board Yellow Magenta Magenta Model : 42 inch Result : A Board Model : 42inch Result : A Board Model : 42 inch Result : A Board Red Red Cyan Model : 42 inch Result : A Board Model : 42 inch Result : A Board Model : 42 inch Result : A Board Green Blue Abnormal Color 46 . Picture Problem (All over the screen) <Symptom> Sync Error <Photo of Symptom> Model : 42 inch Result : A Board Model : 42 inch Result : A Board Model : 42 inch Result : A Board Model : 42 inch Result : A Board Model : 42 inch Result : A Board Model : 42 inch Result : A Board Model : 42 inch Result : A Board Model : 42 inch Result : A Board 47 . Picture Problem (Right half or Left half) <Symptom> Vertical Line <Photo of Symptom> Model : 50 inch Result : A Board Model : 42 inch Result : A Board Model : 42 inch Result : A Board Model : 42 inch Result : A Board Model : 42 inch Result : A Board Model : 42 inch Result : A Board Model : 42 inch Result : A Board Model : 42 inch Result : A Board 48 . Picture Problem (Upper or Bottom) <Symptom> Vertical Line <Photo of Symptom> Model : 42 inch Result : A Board Model : 42 inch Result : A Board Model : 42 inch Result : A Board Model : 42 inch Result : SU Board Model : 42 inch Result : A Board Model : 42 inch Result : SC Board Model : 42 inch Result : SS Board Model : 42 inch Result : SU Board 49 . LOCK mode settings. This is more useful to identify the firmware version without having to decode the info in the setup menu About/Version screen.050 and GenX 1. it shows the unit firmware version (Peaks 1.00) and it checks IC communications ONLY. Self-check Screen How to Exit the self-check screen Press and hold the Power button on the TV for 5 seconds or disconnect the AC cord from the wall outlet. It does not clear channel programmed settings. TV volume down & OK on remote only does a basic IC self check. It does NOT Reset the TV. press the [OK] button on the remote control for more than 3 seconds.)] button on the main unit. picture settings. and while pressing the [VOLUME ( .Self-check Procedure CHASSIS: GPH11D All models NOTE: This procedure does not reset the TV How to access the self-check screen to reset the unit. Select a television channel. 50 . Using this method. channel labels. or password. Note: All customer programmed parameters will be erased. turn the TV on and while pressing the “VOLUME ( . The Self-Check menu appears on screen.Reset Procedure CHASSIS: GPH11D All models To Reset the Unit.)” button on the main unit. Then. disconnect the AC cord from the wall outlet. 51 . press the “Menu” button on the remote control for more than 3 seconds. 2. Connect an Oscilloscope to test point TPSC1. Set the picture controls as follows. Note: See the panel label for voltages that are not listed in the service manual Driver Setup Table Panel Label Adjustment Voltage Initialization Pulse Adjustment 1. First perform Vsus adjustment. Picture menu: Vivid Normal: Set Aspect: Full Caution 1. Input a 100% White signal to the unit. Input a white signal to plasma video input.105V When Vad=-149V. 2. 2. Set the picture controls as follows: Picture menu : Vivid Normal : Set Aspect : Full 3. This should be done after the adjustment of Vad which should be . Test point T2 TPSC1 (SC) Volume VR16602 (SC Level 210 ± 10V 52 . Confirm the voltage level of VSCN. Check the voltage (T2) at 100ms period on the down slop.TH-42PX80U Driver Setup Adjustment Item / Preparation 1. Voltage of Vscn is -4V ±4V. 105V When Vad=-149V. 2. Test point T2 TPSC1 (SC) Volume VR16602 (SC Level 210 ± 10V 53 . Connect an Oscilloscope to test point TPSC1. Note: See the panel label for voltages that are not listed in the service manual Driver Setup Table Panel Label Adjustment Voltage Initialization Pulse Adjustment 1. 2. Confirm the voltage level of VSCN. Picture menu: Vivid Normal: Set Aspect: Full Caution 1. 2. Check the voltage (T2) at 100ms period on the down slop. Set the picture controls as follows. Input a 100% White signal to the unit. Input a white signal to plasma video input. This should be done after the adjustment of Vad which should be . First perform Vsus adjustment. Set the picture controls as follows: Picture menu : Vivid Normal : Set Aspect : Full 3.TH-50PX80U Driver Setup Adjustment Item / Preparation 1. Voltage of Vscn is -4V ±4V.