Table of Contents
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Table of Contents
Troubleshooting
Related Manuals for Panasonic G20 Series
Summary of Contents for Panasonic G20 Series
- Page 1 Cover Page 2010 - FHD Plasma TV Troubleshooting Handbook 2010- Plasma FHD TV – (13 Generation) G20 & G25 Series Applies to models: TC-P42G25 TC-P46G25 TC-P50G20 TC-P50G25 TC-P54G20 TC-P54G25 Panasonic National Training Panasonic Service and Technology Company TTG101013CP...
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Page 2: Table Of Contents
Table of Content Topic Page Topic Page Table of Content Troubleshooting 6 Blinks Failure SOS Detect (Shutdown) Troubleshooting 6 Blinks Failure (1 of 2) Power LED Error Code Definition and the Failure-Causing-Boards Troubleshooting 6 Blinks Failure (2 of 2) Power LED Error Code Definition Troubleshooting 7 Blinks Failure Boards Replacement by Blinking Code (G20/G25 Series) Troubleshooting 7 Blinks Failure (1 o 2) -
Page 3: Sos Detect (Shutdown)
SOS Detect (Shutdown) When an abnormality occurs in the unit, the “SOS Detect” circuit is triggered and the TV shuts down. The power LED on the front panel will flash a pattern indicating the circuit that has failed. Cautions: If the power LED continues to blink even after the TV is unplugged, press and hold the power switch on the TV for a few seconds until the LED turns off. -
Page 4: Power Led Error Code Definition And The Failure-Causing-Boards
Power LED Error Code Definition and the Failure-Causing- Boards LIST OF BOARDS POSSIBLY CASUSING THE FAILURE POWER LED CONDITIONS TRIGGERING ERROR CIRCUIT MONITORED THE SHUTDOWN MOST CODE OCCASIONALLY RARELY COMMON Panel Information SOS ¤ ¤ ¤ 1 BLINLK Communication problem between CPUs on A board. Panel Alarm SOS Missing P15V •... -
Page 5: Power Led Error Code Definition
Power LED Error Code Definition LIST OF BOARDS POSSIBLY CASUSING THE FAILURE POWER LED CONDITIONS TRIGGERING ERROR CIRCUIT MONITORED THE SHUTDOWN MOST CODE OCCASIONALLY RARELY COMMON Missing Vsus. Abnormality of the scan circuit output, the 15V_F, the Scan Drive Circuit and scn_pro, and Vscn circuit. -
Page 6: Boards Replacement By Blinking Code (G20/G25 Series)
Boards Replacement by Blinking Code (G20/G25 Series) Blink List of boards likely to cause the symptom. (Based on Actual Reports and Circuit Operation) Code Most Common Panel Panel Panel Speakers This part can possibly cause this This part can possibly cause Technically, this part is not likely error code, but so far there has this error code and it has... -
Page 7: Quick Procedure To Check For Short Or Low Resistance Condition Of The Vsus
Quick Procedure To Check For Short or Low Resistance Condition of the Vsus, Vda, and P15V Lines Slide 7... -
Page 8: Quick Procedure To Check For Short Or Low Resistance Condition Of The Vsus
Quick Procedure To Check For Short or Low Resistance Condition of the Vsus, Vda, and P15V Lines Note: Vsus is generated by the Power supply and is only used by the SS and SC boards is generated by the Power supply and is only used by the Panel (Panel Drive ICs) P15V is generated by the Power supply and is used by the A, SS, and SC boards Test points for the Vsus, Vda, and P15V can be easily found on... -
Page 9: Quick Procedure To Determine The Cause Of The Problem If A Short Or Low
Quick Procedure To Determine the Cause of the Problem if a short or Low Resistance Reading is Found Slide 9... -
Page 10: Quick Procedure To Determine The Cause Of The Problem If A Short Or Low
Quick Procedure To Determine the Cause of the Problem if a short or Low Resistance Reading is Found Note: For a detailed procedure, see pages 11~16 Shorted Vsus Note: Vsus is generated by the Power supply and is only used by the SS and SC boards If a short is found on the Vsus line, remove connectors P2/SC2 and P11/SS11 one at a time to determine if the SC board or the SS board is defective. -
Page 11: Detailed Troubleshooting Procedure For Shorted Vsus
Detailed Troubleshooting Procedure for Shorted Vsus Slide 11... -
Page 12: Detailed Troubleshooting Procedure For Shorted Vsus
Detailed Troubleshooting Procedure for Shorted Vsus Start Here See the picture on page 10 for connector’s location Unplug connectors P2 and P11, on the P board. Measure the resistance between pin 1 of connector P2 and ground (Chassis) Measure the resistance between pin1 Is there a Replace the P of connector SC2 on the SC board... -
Page 13: Detailed Troubleshooting Procedure For Shorted P15
Detailed Troubleshooting Procedure for Shorted P15 Slide 13... -
Page 14: Detailed Troubleshooting Procedure For Shorted P15V
Detailed Troubleshooting Procedure for Shorted P15V Start Here See the picture on page 10 for connector’s location Unplug connectors P6 and P11, on the P board. Measure the resistance between pin 1 of connector P6 and ground (Chassis) Is there a Replace the P short board... -
Page 15: Detailed Troubleshooting Procedure For Shorted Vda
Detailed Troubleshooting Procedure for Shorted Vda Slide 15... -
Page 16: Detailed Troubleshooting Procedure For Shorted Vda
Detailed Troubleshooting Procedure for Shorted Vda Start Here Unplug the connector P35 on the P board and check the resistance between pin 1 of connector P35 on the P board and ground (Chassis). Is there a Replace the P short board circuit ? TC-P42G25... -
Page 17: Troubleshooting 1 Blink Failure
Troubleshooting 1 Blink Failure Slide 17... -
Page 18: Troubleshooting 1 Blink Failure
Troubleshooting 1 Blink Failure If the TV shuts down and the power LED blinks 1 time, replace the A Slide 18 Slide 68... -
Page 19: Troubleshooting 2 Blinks Failure
Troubleshooting 2 Blinks Failure Slide 19... -
Page 20: Troubleshooting 2 Blinks Failure (1 Of 2)
Troubleshooting 2 Blinks Failure (1 of 2) Cautions: Disconnect the AC Power prior to making any disconnection or connection. If the power LED continues to blink even after the TV is unplugged, press and hold the power switch on the TV for a few seconds until the LED turns off. -
Page 21: Troubleshooting 2 Blinks Failure (2 Of 2)
Troubleshooting 2 Blinks Failure (2 of 2) Blink List of boards likely to cause this symptom. (Based on reports and circuit operation). Code Most Common This part can possibly cause this error code and This part can possibly cause this error code, but there has it has been confirmed to cause this symptom. -
Page 22: Troubleshooting 3 Blinks Failure
Troubleshooting 3 Blinks Failure Slide 22... -
Page 23: Troubleshooting 3 Blinks Failure (1 Of 2)
Troubleshooting 3 Blinks Failure (1 of 2) Cautions: Disconnect the AC Power prior to making any disconnection or connection. If the power LED continues to blink even after the TV is unplugged, press and hold the power switch on the TV for a few seconds until the LED turns off. -
Page 24: Troubleshooting 3 Blinks Failure (2 Of 2)
Troubleshooting 3 Blinks Failure (2 of 2) Blink List of boards likely to cause this symptom. (Based on reports and circuit operation). Code Most Common Panel This part can possibly cause this error This part can possibly cause this Technically, this part is not likely to code, but so far there has not been any error code and it has been cause this error code, but it has been... -
Page 25: Troubleshooting 4 Blinks Failure
Troubleshooting 4 Blinks Failure Slide 25... -
Page 26: Troubleshooting A 4 Blinks Failure (1 Of 2)
Troubleshooting a 4 Blinks Failure (1 of 2) Cautions: Disconnect the AC Power prior to making any disconnection or connection. If the power LED continues to blink even after the TV is unplugged, press and hold the power switch on the TV for a few seconds until the LED turns off. -
Page 27: Troubleshooting A 4 Blinks Failure (2 Of 2)
Troubleshooting a 4 Blinks Failure (2 of 2) See the picture on page 10 for connector’s location Start Here Follow the procedure on slide 8 to check the Vsus, Vda, and P15V for short circuit or low resistance reading. Follow the Is there a short Unplug the TV and disconnect SC20 procedure on... -
Page 28: Troubleshooting 5 Blinks Failure
Troubleshooting 5 Blinks Failure Slide 28... -
Page 29: Troubleshooting 5 Blinks Failure (1 Of 3)
Troubleshooting 5 Blinks Failure (1 of 3) Cautions: Disconnect the AC Power prior to making any disconnection or connection. If the power LED continues to blink even after the TV is unplugged, press and hold the power switch on the TV for a few seconds until the LED turns off. -
Page 30: Troubleshooting 5 Blinks Failure (2 Of 3)
Troubleshooting 5 Blinks Failure (2 of 3) To easily measure the P5V, locate the coil L9801. The location of L9801 is shown in the image below P5V (L9801) Location TC-P42G25 TC-P42G25 Slide 30... -
Page 31: Troubleshooting 5 Blinks Failure (3 Of 3)
Troubleshooting 5 Blinks Failure (3 of 3) Start Here Follow the procedure on page 8 to check the Vsus, Vda, and P15V for short circuit or low resistance reading. Follow the Is there a short circuit of procedure on the Vsus, Vda, or slides 9~16 P15V? Unplug the TV and check the resistance between L9801 on the A board and ground (Chassis). -
Page 32: Troubleshooting 6 Blinks Failure
Troubleshooting 6 Blinks Failure Slide 32... -
Page 33: Troubleshooting 6 Blinks Failure (1 Of 2)
Troubleshooting 6 Blinks Failure (1 of 2) Cautions: Disconnect the AC Power prior to making any disconnection or connection. If the power LED continues to blink even after the TV is unplugged, press and hold the power switch on the TV for a few seconds until the LED turns off. -
Page 34: Troubleshooting 6 Blinks Failure (2 Of 2)
Troubleshooting 6 Blinks Failure (2 of 2) See the picture on page 10 for connector’s location Start Here Follow the procedure on page 8 to check the Vsus, Vda, and P15V for short circuit or low resistance reading. Follow the Is there a short circuit of procedure on the Vsus, Vda, or... -
Page 35: Troubleshooting 7 Blinks Failure
Troubleshooting 7 Blinks Failure Slide 35... -
Page 36: Troubleshooting 7 Blinks Failure (1 O 2)
Troubleshooting 7 Blinks Failure (1 of 2) Cautions: Disconnect the AC Power prior to making any disconnection or connection. Wait at least 2 minutes before the removal of any connector. If the power LED continues to blink even after the TV is unplugged, press and hold the power switch on the TV for a few seconds until the LED turns off. - Page 37 Troubleshooting 7 Blinks Failure (2 of 2) Check the panel for abnormalities and burnt pixels. Start Here Unplug the TV and check all the connectors on the SC, SU, and SD (42” = SM board). Make sure they are properly seated. If the TV still shuts down with 7 blinks, unplug it and follow the procedure on page 8 to check the Vsus, Vda, and P15V for short circuit or low resistance reading.
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Page 38: Su-Sd Boards (Together) Isolation Procedure
SU-SD boards (Together) Isolation Procedure Slide 38... -
Page 39: Su-Sd Boards (Together) Isolation Procedure
SU-SD boards (Together) Isolation Procedure Preparation: Disconnect AC Power prior to making any disconnection or connection. Wait at least 2 minutes before the removal of any connector. Note: If the power LED continues to blink even after the TV is unplugged, press and hold the power switch on the TV for a few seconds until the LED turns off. -
Page 40: Su Board Isolation Procedure
SU Board Isolation Procedure Preparation: To isolate either the SU or the SD board individually, all the connectors, (Except the panel flex-cables) and the Disconnect AC Power prior to making any disconnection or connection. VF-GND screws on the board have to be removed. Wait at least 2 minutes before the removal of any connector. -
Page 41: Sd Board Isolation Procedure
SD Board Isolation Procedure Preparation: To isolate either the SU or the SD board individually, all the connectors, (Except the panel flex-cables) and the Disconnect AC Power prior to making any disconnection or connection. VF-GND screws on the board have to be removed. Wait at least 2 minutes before the removal of any connector. -
Page 42: Vfo, Vscn-F, & 5V_F Resistance Measurements (Su-Sd Boards)
Vfo, VSCN-F, & 5V_F Resistance Measurements (SU-SD boards) Slide 42... -
Page 43: Vfo, Vscn-F, & 5V_F Resistance Measurements (Su-Sd Boards)
Vfo, VSCN-F, & 5V_F Resistance Measurements (SU-SD boards) Preparation: Disconnect AC Power prior to making any disconnection or connection. Wait at least 2 minutes before the removal of any connector. Note: If the power LED continues to blink even after the TV is unplugged, press and hold the power switch on the TV for a few seconds until the LED turns off. -
Page 44: Vfo, Vscn-F, & 5V_F Resistance Measurements (Su-Sd Boards)
Vfo, VSCN-F, & 5V_F Resistance Measurements (SU-SD boards) SU Board SC Board VF-GND SD Board Slide 44... -
Page 45: Troubleshooting 8 Blinks Failure
Troubleshooting 8 Blinks Failure Slide 45... -
Page 46: Troubleshooting 8 Blinks Failure
Troubleshooting 8 Blinks Failure Vsus SS11 P15V Vda Vsus Vsus pulse Vsus ENERGY RECOVERY D16253 P15V IC16251 SS61 (8X) SOS DETECT IC1100 D16255 SYSTEM MPU SS64 D16280 IC5480 Q16280 SS21 ANALOG- PANEL ASIC _SOS SOS8 SS33 SS24 SS58 SOS8 Slide 46... -
Page 47: Troubleshooting 8 Blinks Failure
Troubleshooting 8 Blinks Failure Cautions: Disconnect the AC Power prior to making any disconnection or connection. If the power LED continues to blink even after the TV is unplugged, press and hold the power switch on the TV for a few seconds until the LED turns off. -
Page 48: Troubleshooting 9 Blinks Failure
Troubleshooting 9 Blinks Failure Slide 48... -
Page 49: Troubleshooting 9 Blinks Failure
Troubleshooting 9 Blinks Failure This condition can cause the TV to shutdown and the power LED to blink 9 time Failure of PD4 IC9300 (Discharge control) 9 blinks can be caused by failure of IC9300, IC5480, and IC1100. Since all these ICs are located on the A board, only the A board should be replaced. -
Page 50: Troubleshooting 10 Blinks Failure
Troubleshooting 10 Blinks Failure At Plug in Slide 50... -
Page 51: Troubleshooting 10 Blinks Failure At Plug In
Troubleshooting 10 Blinks Failure At Plug in Start Here Unplug the TV. Make sure P6 and P7 on the P board are properly seated. Plug in the TV but do not turn the power on Unplug the TV. Using a Note: When taking voltage reading, place the voltmeter, place the positive... -
Page 52: Troubleshooting 10 Blinks Failure
Troubleshooting 10 Blinks Failure At Power on Slide 52... -
Page 53: Troubleshooting 10 Blinks Failure After Power On
Troubleshooting 10 Blinks Failure After Power On Blink List of boards likely to cause this symptom. (Based on actual reports and circuit operation). Code Most Common This part can possibly cause this This part can possibly cause Technically, this part is not likely error code, but so far there has this error code and it has to cause this error code, but it... -
Page 54: Troubleshooting 12 Blinks Failure
Troubleshooting 12 Blinks Failure Slide 54... -
Page 55: Troubleshooting 12 Blinks Failure
Troubleshooting 12 Blinks Failure These 3 conditions can cause the TV to shut down and the power LED to blink 12 times A Board. Pinched speaker wire. Speakers Blink List of boards likely to cause this symptom. (Based on actual reports and circuit operation). Code Most Common Speaker... -
Page 56: Troubleshooting 12 Blinks Failure
Troubleshooting 12 Blinks Failure Cautions: Disconnect the AC Power prior to making any disconnection or connection. If the power LED continues to blink even after the TV is unplugged, press and hold the power switch on the TV for a few seconds until the LED turns off. -
Page 57: Troubleshooting No Power/Dead Unit
Troubleshooting No Power/Dead Unit Slide 57... -
Page 58: Troubleshooting No Power/Dead Unit
Troubleshooting No Power/Dead Unit These 3 conditions can cause the TV to be dead with no power. A Board. P Board. K Board Condition List of boards likely to cause this symptom. Most Common Dead Cautions: Disconnect the AC Power prior to making any disconnection or connection. When taking voltage reading, place the voltmeter probe at the test point, component, or connector’s pin indicated before connecting the TV to the AC line. -
Page 59: Troubleshooting No Power/Dead Unit
Troubleshooting No Power/Dead Unit Start Here Plug in the TV. Do not turn the power on Unplug the TV and place your Do the AC relays volt-meter on pin 1 of click after the TV is plugged connector P7. Plug in the TV into the AC line? But do not turn the power on Unplug the TV and place your volt-meter... -
Page 60: Tv's Behavior After Connectors Removal
TV’s Behavior After Connectors Removal Slide 60... -
Page 61: Tv's Behavior After Connectors Removal
TV’s Behavior After Connectors Removal TC-P42G25 MODEL N0. TC-P42S2 (Connectors Removal on the SS + combination of MODEL N0. TC-P42S2 (Connectors Removal on the SC Board) connectors on the SS board and SC board) Connector on Connector on Connector on Connector Connector Result... -
Page 62: End
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