Panasonic G20 Series Troubleshooting Handbook Download Page 1

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Panasonic National Training

Panasonic Service and Technology Company

TC-P42G25
TC-P46G25
TC-P50G20
TC-P50G25
TC-P54G20
TC-P54G25

Applies to models:

TTG101013CP

Cover Page

2010 - FHD Plasma TV Troubleshooting Handbook

2010- Plasma FHD TV – (13

Generation)

G20 & G25 Series

Summary of Contents for G20 Series

Page 1: ...sonic Service and Technology Company TC P42G25 TC P46G25 TC P50G20 TC P50G25 TC P54G20 TC P54G25 Applies to models TTG101013CP Cover Page 2010 FHD Plasma TV Troubleshooting Handbook 2010 Plasma FHD TV...

Page 2: ...5 Troubleshooting a 4 Blinks Failure 1 of 2 26 Troubleshooting a 4 Blinks Failure 2 of 2 27 Troubleshooting 5 Blinks Failure 28 Troubleshooting 5 Blinks Failure 1 of 3 29 Troubleshooting 5 Blinks Fail...

Page 3: ...t allow the TV to run for more than 30 seconds while connectors or boards are disconnected NOTE When taking voltage reading place your meter s probe on the test point or pin indicated before connectin...

Page 4: ...ected by one of the C boards or the Panel A short circuit of the P3 3V Wrong diagnostic by the A board C1 or C2 A Panel 4 BLINKS Power Supply output voltages Regulation issues with any of the voltages...

Page 5: ...Panel SC SM A 8 BLINKS Sustain Drive Circuit and Connection between the SS board and the Panel Abnormality of the Sustain drive circuit Open or loose connection between the SS board and FPCs from the...

Page 6: ...SD SC SS C2 A 6 SC SD A C 7 SC SU SM SD Panel A 8 SS A Panel C2 9 A 10 SC A SD SS SU P K 11 Fan A 12 A Speakers This part can possibly cause this error code but so far there has not been any report of...

Page 7: ...Quick Procedure To Check For Short or Low Resistance Condition of the Vsus Vda and P15V Lines Slide 7...

Page 8: ...used by the SS and SC boards Vda 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...

Page 9: ...Quick Procedure To Determine the Cause of the Problem if a short or Low Resistance Reading is Found Slide 9...

Page 10: ...ween the C1 and C2 boards and the panel s flex cables connected to the C boards one at a time Shorted P15V If a short is found on the P15V line remove connectors P6 P11 P25 and SC20 one at a time to d...

Page 11: ...Detailed Troubleshooting Procedure for Shorted Vsus Slide 11...

Page 12: ...the SC board and ground Chassis Yes No Is there a short circuit Replace the P board Yes No Is there a short circuit Replace the SC board Replace the SS board Measure the resistance between pin1 of con...

Page 13: ...Detailed Troubleshooting Procedure for Shorted P15 Slide 13...

Page 14: ...P6 and ground Chassis Yes No Is there a short circuit Replace the P board Disconnect SC20 on the SC board and reconnect P6 Measure the resistance between pin 1 of connector P6 and ground Chassis Yes N...

Page 15: ...Detailed Troubleshooting Procedure for Shorted Vda Slide 15...

Page 16: ...r the panel Proceed to isolate the panel from the C2 board to determine which is bad The problem could be the C1 board or the panel Proceed to isolate the panel from the C1 board to determine which is...

Page 17: ...Troubleshooting 1 Blink Failure Slide 17...

Page 18: ...Troubleshooting 1 Blink Failure If the TV shuts down and the power LED blinks 1 time replace the A Slide 68 Slide 18...

Page 19: ...Troubleshooting 2 Blinks Failure Slide 19...

Page 20: ...hold the power switch on the TV for a few seconds until the LED turns off When taking voltage reading place the voltmeter probe at the test point component or connector s pin indicated before connect...

Page 21: ...SS boards Slide 21 See the picture on page 10 for connector s location Yes Follow the procedure on slide 8 to check the Vsus Vda and P15V for short circuit or low resistance reading No Is there a shor...

Page 22: ...Troubleshooting 3 Blinks Failure Slide 22...

Page 23: ...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 tu...

Page 24: ...bad Blink Code List of boards likely to cause this symptom Based on reports and circuit operation Most Common 2nd 3rd 4th 5th 6th 7th 3 SC C1 C2 C3 Panel A This part can possibly cause this error code...

Page 25: ...Troubleshooting 4 Blinks Failure Slide 25...

Page 26: ...AC line This will ensure voltage reading accuracy before the TV shuts down Since the TV is shutting down expect the voltage to only come up a couple of seconds Blink Code List of boards likely to caus...

Page 27: ...or low resistance reading Is there a short circuit of the Vsus Vda or P15V Follow the procedure on slides 9 16 Yes No Start Here Unplug the TV and disconnect SC20 on the SC board Turn the power on Rep...

Page 28: ...Troubleshooting 5 Blinks Failure Slide 28...

Page 29: ...or code but so far there has not been any report of this part causing this symptom This part can possibly cause this error code and it has been confirmed to cause this symptom Technically this part is...

Page 30: ...Slide 30 Troubleshooting 5 Blinks Failure 2 of 3 TC P42G25 To easily measure the P5V locate the coil L9801 The location of L9801 is shown in the image below TC P42G25 A P5V L9801 Location...

Page 31: ...rd Reconnect A32 Measure the resistance between L9801 and ground Chassis Yes No Is there a short circuit Replace the SC board Yes No Is there a short circuit Replace the C2 board Replace the SS board...

Page 32: ...Troubleshooting 6 Blinks Failure Slide 32...

Page 33: ...onnection between the C boards and open connection between any of the C board and the A board Cautions Disconnect the AC Power prior to making any disconnection or connection If the power LED continue...

Page 34: ...oard Plug in the TV and turn it on No Did the number of blinks change to 8 blinks Start Here Replace the A board Replace the SC board 6 Blinks Follow the procedure on page 8 to check the Vsus Vda and...

Page 35: ...Troubleshooting 7 Blinks Failure Slide 35...

Page 36: ...d expose the panel to a bright light for a thorough visual inspection Check for cracks and blown pixels or any other abnormalities Check for burnt spots on the SM board Warning The Vsus line has large...

Page 37: ...k the panel for abnormalities and burnt pixels Follow the procedure on the pages 9 16 Replace the SM board Yes No Is the TV still shutting down Disconnect the TV and reconnectSC20 Plug in the TV Set y...

Page 38: ...SU SD boards Together Isolation Procedure Slide 38...

Page 39: ...C50 Jig or just jump pins 1 and 2 of connector SC50 on the SC board Preparation Disconnect AC Power prior to making any disconnection or connection Wait at least 2 minutes before the removal of any co...

Page 40: ...wer 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 t...

Page 41: ...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...

Page 42: ...Vfo VSCN F 5V_F Resistance Measurements SU SD boards Slide 42...

Page 43: ...Remove the 4 VFG screws from the SU and SD boards See picture to the next page page 44 2 Disconnect SC41 SC42 and SC46 from the SC board Also remove the ribbon cable between the SU and SD boards SU11...

Page 44: ...Slide 44 Vfo VSCN F 5V_F Resistance Measurements SU SD boards SC SC Board SD Board VF GND SU Board...

Page 45: ...Troubleshooting 8 Blinks Failure Slide 45...

Page 46: ...ANALOG ASIC A6 A32 5V 3 PANEL _SOS SOS8 66 4 30 63 68 P5V C2 C2 SS SS ENERGY RECOVERY IC16251 8X SOS DETECT 15V SOS8 SS11 P6 3 Vsus 1 4 P5V PANEL MAIN ON P15V Vda Vsus P11 C23 C21 1 4 SS61 SS64 SS58 S...

Page 47: ...tions 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 sec...

Page 48: ...Troubleshooting 9 Blinks Failure Slide 48...

Page 49: ...and the power LED to blink 9 time 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 P P A A IC1100 SYSTE...

Page 50: ...Troubleshooting 10 Blinks Failure At Plug in Slide 50...

Page 51: ...V Using a voltmeter place the positive probe at pin 6 of connector P7 while the negative probe is grounded Plug in the TV Unplug the TV and disconnect connector A1 on the A board Plug in the TV Do not...

Page 52: ...Troubleshooting 10 Blinks Failure At Power on Slide 52...

Page 53: ...ause this error code and it has been confirmed to cause this symptom Technically this part is not likely to cause this error code but it has been confirmed to cause this symptom Unplug the TV and disc...

Page 54: ...Troubleshooting 12 Blinks Failure Slide 54...

Page 55: ...the base of Q2300 As a result Q2300 comes on and outputs a high to pin 27 of the System CPU IC1100 on the A board Blink Code List of boards likely to cause this symptom Based on actual reports and cir...

Page 56: ...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 tu...

Page 57: ...Troubleshooting No Power Dead Unit Slide 57...

Page 58: ...be dead with no power Condition List of boards likely to cause this symptom Most Common 2nd 3rd 4th 5th 6th 7th Dead P A K Cautions Disconnect the AC Power prior to making any disconnection or connect...

Page 59: ...of connector P7 Plug in the TV and press the power switch Is there 3 2V present when the power button is pressed Unplug the TV and disconnect A1 on the A board Plug in the TV and turn the power on Un...

Page 60: ...TV s Behavior After Connectors Removal Slide 60...

Page 61: ...Board Result SS11 TV Stays On SS33 TV Stays On SS11 SS33 TV Stays On SS11 SC2 SOS 7 Blinks SS33 SC2 SOS 7 Blinks SS11 SS33 SC2 SOS 7 Blinks SS11 SC20 SOS 6 Blinks SS33 SC20 SOS 6 Blinks SS33 SC2 SC20...

Page 62: ...End Slide 62...

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