Panasonic Viera Link TH-42PZ80U Technical Manual Download Page 48

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Picture Trouble all Over the Screen

<Symptom>

(Front view)

Trouble at All area :

D or SC board

(SU,SD) defect

Symptom
Result

: Vertical line (All over screen)

D board

White balance NG

D board

Abnormal Picture

SC board

<Actual Symptom>

Picture noise, Full Vertical line, etc.

<Symptom>

<NG Area

(e.g. 42 inch Panel)

<Models>

42inch (HD Panel)

<Defective board>

Summary of Contents for Viera Link TH-42PZ80U

Page 1: ...5U TH 42PZ800U TH 46PZ800U TH 50PZ800U TH 46PZ850U TH 50PZ850U Technical Guide Technical Guide Plasma Plasma GPH11DU Chassis GPH11DU Chassis HD Models HD Models Troubleshooting Handbook Troubleshootin...

Page 2: ...This page is purposely left blank 2...

Page 3: ...reen 48 Examples of Symptoms and Remedies 50 Self check Procedure 56 Reset 56 Driver Setup Adjustment 57 Subject Page Connector s Location TH 42PX80U 5 Power LED s Response to Shutdown Operation 7 LED...

Page 4: ...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 Tr...

Page 5: ...5 Connector s Location TH 42PZ85U Figure 1...

Page 6: ...ubleshooting Shutdown Problems 6 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 disconn...

Page 7: ...Microcomputer D A 2 15V SOS D 3 3 3V SOS D 4 Power Supply SOS P 5 5V SOS D 6 SC Energy recovery SOS SC D P 7 SC floating voltage SOS SC SU SD D P 8 SS Energy recovery SOS SS D P 9 Panel Configuration...

Page 8: ...connectors P6 and P7 on the P Board See Figure 1 Plug in the TV Is the TV turning on by itself with the following conditions Power LED Off SC LED On SS LED ON Replace the D board Replace the A board N...

Page 9: ...imes Trouble Mode 15V down SOS Defective Board Possibility P A SC SS Board P A SC SS 9 2 Blinks Condition can be caused by Missing P15V A short of the P15V Wrong diagnostic by the D board Figure 3 P15...

Page 10: ...or P7 Is there 15V present No Yes Replace The P board Replace The D board Unplug connectors P6 P7 P12 and P25 on the P board Measure the resistance between pin 1 of connector P7 and ground Chassis Is...

Page 11: ...e A board Reconnect P7 and measure the resistance between pin 1 of connector P7 and ground Chassis Is there a short circuit No Yes Replace The D board Disconnect PB30 on the PB board and measure the r...

Page 12: ...LED blinks 3 times Trouble Mode 3 3V down SOS Defective Board D Board Replace the D board 12 Warning Disconnect AC Power prior to making any disconnection or connection...

Page 13: ...13 D Board P Board Turn the TV on Is pin 12 of CN P25 on the P board high before the TV shuts down Warning Disconnect AC Power prior to making any disconnection or connection An abnormal increase in...

Page 14: ...Warning Disconnect AC Power prior to making any disconnection or connection 5 blinks condition can be caused by Figure 4 Missing P5V A short of the P5V A short of the Vda line Note missing Vda from th...

Page 15: ...en pin 1 of connector P12 on the P board and ground Chassis Yes 15 Proceed to more extensive troubleshooting of the slides that follow No Warning Disconnect AC Power prior to making any disconnection...

Page 16: ...ground Chassis Yes No Is there a short to ground Replace the P board Reconnect P25 and disconnect SC20 on the SC board Measure the resistance between pin 5 of connector P25 on the P board and ground C...

Page 17: ...nd Chassis Yes No Is there a short to ground Disconnect the Flex cables between the panel and the C1 board CB1 CB8 Measure the resistance between pin 5 of connector P25 on the P board and ground Chass...

Page 18: ...and D33 and disconnect C26 on the C2 board Also disconnect the Flex cables between the panel and the C2 board CB7 CB11 Measure the resistance between pin 5 of connector P25 on the P board and ground...

Page 19: ...power up and stay on Disconnect connectors SC2 and SC20 from the SC board Plug in the TV and turn it on Connect SC2 2 and SC20 Plug in the TV and turn it on Warning Disconnect AC Power prior to making...

Page 20: ...floating ground screws on the SU board which are located above and below connector SU41 see figure 2 Caution Before turning the unit on confirm that the jumper is not connected to a chassis ground scr...

Page 21: ...d and reconnect the SU board See instructions on previous slide Plug in the TV and turn it on Does the TV shut down and the power LED blink 7 times Does the TV shut down and the power LED blink 7 time...

Page 22: ...D16280 D280 Location 22 Figure 10 Anode D16280 D280 PANEL TH 42PZ85U To pin 66 IC9003 N 2 7V SOS Figure 8 Figure 9 Note The location for this component may not be the same for all models...

Page 23: ...ower up and stay on Is there approx 2 7V at the anode of D280 on the SS board Disconnect the TV Use a volt meter and place the positive probe on the anode of D280 on the SS board See previous slide fo...

Page 24: ...LED blinks 9 times Trouble Mode Panel Status Defective Board D Board Replace the D board 24 Warning Disconnect AC Power prior to making any disconnection or connection...

Page 25: ...power Defective Board Possibility P A GS K GH Missing Shorted F_STB_15V Missing Shorted SUB9V SUB5V and SUB3 3V Wrong diagnostic by the A board 10 blinks condition can be caused by A board Connectors...

Page 26: ...H Do the AC relays click after the TV is plugged into the AC line NO Go to the Next slide Yes NOTE When taking voltage reading place your meter s probe on the test point or pin indicated before connec...

Page 27: ...e AC line The voltage you intent to measure may only appear for a brief moment 27 Unplug the TV and disconnect connector P6 on the P board Using a voltmeter place the positive probe at pin 7 of connec...

Page 28: ...d Warning Disconnect AC Power prior to making any disconnection or connection 2 CAUTION Before connecting P2 SC2 or P11 SS11 discharge is necessary to prevent potential shock caused by VSUS 3 VSUS abo...

Page 29: ...connect AC Power prior to making any disconnection or connection Figure 13 11 blinks condition happens 1 If one of the fans opens or increases resistance 2 If the PB board becomes defective triggering...

Page 30: ...on when the TV is turned on Replace the Fan 30 Unplug the TV and disconnect connector PB30 on the PB board Plug in the TV and turn it on Warning Disconnect AC Power prior to making any disconnection...

Page 31: ...oes the power LED stay on when the TV is turned on Check the speakers and the speaker s wires 31 Unplug the TV and disconnect connectors P6 and P7 on the P board Plug in the TV Warning Disconnect AC P...

Page 32: ...and disconnect connectors P6 and P7 on the P Board See Figure 1 Plug in the TV Is the TV turning on by itself with the following conditions Power LED Off SC LED On SS LED ON Replace the D board Repla...

Page 33: ...ere continuity between pins 8 and 10 of connector P12 of the P board Unplug the TV and place your volt meter on pin 11 of connector P25 or A25 Plug in the TV and press the power switch Is there 3 2V p...

Page 34: ...ect connector A52 Plug in the TV Unplug the TV and place your volt meter on pin 6 of connector P7 Plug in the TV TH 46PZ850U TH 50PZ850U TH 42PZ80 85U TH 46PZ80 85U TH 50PZ80 85U TH 42PZ800U TH 46PZ80...

Page 35: ...eck the cable between connector A7 on the A board and P6 on the P board Is there 15V at pin 1 of CN A6 on the A board Is there a sound waveform at pin 1 and 3 of CN A12 on the A board Replace The A bo...

Page 36: ...This page is purposely left blank 36...

Page 37: ...Troubleshooting for Picture Problems 37...

Page 38: ...e 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 All over the screen 3 Adjustment after PCB exchange 1 After...

Page 39: ...d at the left top corner Finally gas leakage will lead to the symptom No picture with buzz noise How to determine the defective board Start Upper or Lower half from front view Upper half Lower half Bo...

Page 40: ...Diagram Possible Cause Back side view IC9900 DATA DRIVER IC9500 A MICRO PROCESSOR IC4510 Peaks Lite IC1100 HDMI I F PICTURE OUTPUT IC8001 S F PROCESSOR PLASMA AI DISCHARGE CONTROL LVDS RECEIVER SU SD...

Page 41: ...Buffer IC Buffer IC Sustain Control Pulse Scan Control Pulse D Board defect Waveform OK SC SU SD Board defect Waveform NG Refer to Diagnosis 3 on next page Result Cause Confirm the waveform at TPSC1...

Page 42: ...oard Situation Disconnect SU Board Connect SD Condition Waveform OK Cause SU Board Disconnect SD Board Connect SU Waveform OK SD Board Disconnect the SU and SD Boards Waveform OK SC Board Back side vi...

Page 43: ...board or C board NG D board or C board FPC 1 Line FPC Buffer C Board Buffer C Board Driver IC 1 Block 2 Blocks PDP panel Driver IC NG or D board or C board Driver IC Driver IC Driver IC PDP Panel PDP...

Page 44: ...Trouble at Upper half SU board SC or D defect NG Area No Picture Picture noise Full Horizontal line etc Actual Symptom Full Horizontal line at both area SS board D defect Symptom Result Symptom Result...

Page 45: ...re Picture noise etc Trouble at Left half D board defect 1 2 Trouble at Right half D board defect Symptom Result Cyan noise Right side D board Actual Symptom Symptom Defective board NG Area Models 50i...

Page 46: ...re noise Full Vertical line etc Front view SC SU SD SS C1 C2 D 1 2 Trouble at Left half D or C2 board Panel defect 1 2 Trouble at Right half D or C1 board Panel defect Symptom Result Vertical line Pan...

Page 47: ...ertical line etc Symptom NG Area Models 50inch HD Panel 1 Trouble at Upper right 2 Trouble at Upper middle C1 board or Panel defect 3 C2 board or Panel defect C3 board or Panel defect SC SU SD SS C1 C...

Page 48: ...D or SC board SU SD defect Symptom Result Symptom Result Symptom Result Vertical line All over screen D board White balance NG D board Abnormal Picture SC board D SC Actual Symptom Picture noise Full...

Page 49: ...Examples of Symptoms and Remedies 49...

Page 50: ...een Model 42 inch Result A Board Model 42 inch Result D Board Model 42 inch Result D Board Model 42 inch Result A Board Model 42 inch Result SC Board Model 42 inch Result SC Board Model 42 inch Result...

Page 51: ...reen Model 42 inch Result D Board Model 42 inch Result D Board Model 42 inch Result D Board Model 42 inch Result D Board Model 42 inch Result D Board Model 42 inch Result D Board Model 42 inch Result...

Page 52: ...esult D Board Model 42 inch Result D Board Model 42 inch Result D Board Model 42 inch Result D Board Model 42inch Result D Board Model 42 inch Result D Board Model 42 inch Result D Board Model 42 inch...

Page 53: ...ll over the screen Model 42 inch Result D Board Model 42 inch Result D Board Model 42 inch Result D Board Model 42 inch Result D Board Model 42 inch Result D Board Model 42 inch Result D Board Model 4...

Page 54: ...ight half or Left half Model 50 inch Result D Board Model 42 inch Result D Board Model 42 inch Result D Board Model 42 inch Result D Board Model 42 inch Result D Board Model 42 inch Result D Board Mod...

Page 55: ...Upper or Bottom Model 42 inch Result D Board Model 42 inch Result D Board Model 42 inch Result D Board Model 42 inch Result SU Board Model 42 inch Result D Board Model 42 inch Result SC Board Model 4...

Page 56: ...from the wall outlet Self check Screen CHASSIS GPH11D All models TV volume down OK on remote only does a basic IC self check It does NOT Reset the TV It does not clear channel programmed settings pict...

Page 57: ...ed parameters will be erased 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 m...

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