Panasonic Viera TC-P42X1 Revised Troubleshooting Handbook Download Page 13

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Slide #13

Power LED’s Response to Connectors Removal (42” HD Models)

Model:

TC-P42X1

Connector

Result

A20

Unplugged

A31

Unplugged

SOS 6 Blinks

A32

Unplugged

SOS 6 Blinks

A20

Unplugged

A31

Unplugged

A20

Unplugged

A32

Unplugged

A31

Unplugged

A32

Unplugged

SOS 6 Blinks

A20

Unplugged

A31

Unplugged

A32

Unplugged

TV Stays On With Black Screen

HD Models

Do not remove any connectors from any of

the PC boards unless instructed to do so.

CAUTION:

Some steps require

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.

CAUTION:

The TV power should not be

turned on while SC2 is disconnected. This

could damage the SS board.

Summary of Contents for Viera TC-P42X1

Page 1: ...TV 12th Generation Model TC P42PX1 TC P42X1 TC P50X1 TC P42C1 TC P50C1 TC P42S1 TC P46S1 TC P50S1 TC P54S1 TC P42U1 TC P46U1 TC P50U1 TC P42G10 TC P46G10 TC P50G10 TC P54G10 TC P42G15 TC P46G15 TC P50...

Page 2: ...to service a product Products powered by electricity should be serviced or repaired only by experienced professional technicians Any attempt to service or repair the product or products dealt with in...

Page 3: ...e Test All Models Except TC 50PX14 TC P50X1 TC P50C1 30 SC Board Resistance Test Models TC 50PX14 TC P50X1 TC P50C1 31 1 Blink Error Code All Models 32 2 Blinks Error Code All Models 33 2 Blinks Error...

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 Tro...

Page 5: ...Slide 5 HD boards Layout TC P42X1...

Page 6: ...Slide 6 Full HD boards Layout TC P42S1...

Page 7: ...Slide 7 Full HD Connector s Location TC P42S1...

Page 8: ...Troubleshooting Shutdown Problems CAUTION Some steps require removal of connectors and sometimes PC boards removal Do not let the TV run for more than 30 seconds while connectors or boards are discon...

Page 9: ...ll flash a pattern indicating the circuit that has failed 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 t...

Page 10: ...Slide 10 Shutdown Detect Block Diagram...

Page 11: ...Slide 11 HD Panel Drive SOS Detect Block Diagram TC P42X1...

Page 12: ...Slide 12 Full HD Panel Drive SOS Detect Block Diagram TC P42S1...

Page 13: ...A32 Unplugged SOS 6 Blinks A20 Unplugged A31 Unplugged A32 Unplugged TV Stays On With Black Screen HD Models Do not remove any connectors from any of the PC boards unless instructed to do so CAUTION S...

Page 14: ...d OK SC20 Unplugged SS11 Unplugged OK Model TC P42X1 SC Board Isolation Connector Connector Connector Connector On SS board Result SC2 Unplugged SOS 7 Blinks SC3 Unplugged SOS 6 Blinks SC20 Unplugged...

Page 15: ...6 Blinks SC20 Unplugged SS11 Unplugged SOS 6 Blinks Model TC P50X1 SC Board Isolation Connector On C1 board Connector Connector Connector On SS board Result SC3 Unplugged SOS 6 Blinks SC20 Unplugged S...

Page 16: ...ged A31 Unplugged SOS 6 Blinks A33 Unplugged A32 Unplugged OK A31 Unplugged A32 Unplugged SOS 6 Blinks A33 Unplugged A31 Unplugged A32 Unplugged TV Stays On With Black Screen Full HD Models CAUTION So...

Page 17: ...ult SS11 Unplugged SC2 Unplugged 7 Blinks SS11 Unplugged SC20 Unplugged 6 Blinks SS11 Unplugged SC2 Unplugged SC20 Unplugged 6 Blinks SS11 Unplugged SS33 Unplugged SC2 Unplugged 7 Blinks SS11 Unplugge...

Page 18: ...between VF_GND and CHA on the SC board This floats point CHA triggering the SOS7 detect circuit This outputs a high to the A board through connector SC20 triggering shutdown A new SC test fixture Jig...

Page 19: ...en pins 1 and 2 of connector SC50 on the SC board Note If the SC jig is not available install a jumper between pins 1 and 2 of connector SC50 on the SC board Remove the jig or the jumper after complet...

Page 20: ...e 20 Procedure to Isolate both SU SD at the Same Time 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...

Page 21: ...connector SC50 on the SC board Note If the SC jig is not available install a jumper between pins 1 and 2 of connector SC50 on the SC board Remove the jig or jumper after completing isolation procedure...

Page 22: ...2 of connector SC50 on the SC board Note If the SC jig is not available install a jumper between pins 1 and 2 of connector SC50 on the SC board Remove the jig or jumper after completing isolation pro...

Page 23: ...How to Easily Gain Access to the SS board SCREW SCREW SCREW Remove the 3 screws that hold the A board assembly in place Let the A board assembly rest on the speaker s magnet to gain access to the SS b...

Page 24: ...e the 4 screws holding the front panel in place Remove the cables from the speakers Remove the screws from the speakers 2 each Remove the speakers Remove the front cabinet Note To remove the front cab...

Page 25: ...on the SU and SD boards for blown hole on the surface Note In some models it is not possible to check if these ICs are blown because they use surface mount heat sinks that are glued to the surface of...

Page 26: ...ds Resistance Test Procedure Note The result of the resistance test determine if the boards are bad but it does not determine if they are 100 good For this reason after performing a resistance test we...

Page 27: ...te A low resistance reading indicates a defective SU board Preparation Disconnect AC Power prior to making any disconnection or connection Wait at least 2 minutes before the removal of any connector N...

Page 28: ...1Mega ohms Note A low resistance reading indicates a defective SD board Preparation Disconnect AC Power prior to making any disconnection or connection Wait at least 2 minutes before the removal of a...

Page 29: ...a ohms Note A low resistance reading indicates a defective SD board Preparation Disconnect AC Power prior to making any disconnection or connection Wait at least 2 minutes before the removal of any co...

Page 30: ...is approximately 2 9Kilo ohms and approx 5 7Kilo ohms for pin 5 Note A low resistance reading indicates a defective SC board Preparation Disconnect AC Power prior to making any disconnection or conne...

Page 31: ...proximately 2 9Kilo ohms and approx 5 7Kilo ohms for pin 7 Note A low resistance reading indicates a defective SC board Preparation Disconnect AC Power prior to making any disconnection or connection...

Page 32: ...5V at pin 9 of connector P25 A25 Make sure that connectors P25 and D25 are properly seated Replace the P board Is there continuity between pin 9 of connector P25 and pin 5 of connector P7 on the P bo...

Page 33: ...isconnection or connection 1 Missing P15V 2 A short of the P15V 3 Wrong diagnostic by the A board These 3 conditions can cause the TV to shutdown and the power LED to blink 2 times If the power LED co...

Page 34: ...nd P25 on the P board Measure the resistance between pin 1 of connector P6 and ground Chassis Is there a short circuit No Yes Replace The P board Reconnect P11 and measure the resistance between pin 1...

Page 35: ...rd A Board Replace the A board Warning Disconnect AC Power prior to making any disconnection or connection Start Here If the power LED continues to blink even after the TV is unplugged press and hold...

Page 36: ...ere a short to ground Replace the SS board Replace the SC board Disconnect the TV Disconnect P2 and P11 on the P board Measure the resistance between pin 1 of connector SS11 on the SS board and ground...

Page 37: ...5V 2 A short of the P5V 3 A short of the Vda line Note missing Vda from the P board does not cause 5 blinks 4 Wrong diagnostic by the A board These 4 conditions can cause the TV to shut down and the p...

Page 38: ...ection or connection Does the power supply makes a chirp noise at plug in Start Here Yes No Yes No Is there a short to ground Replace the SS board Replace the SC board Disconnect the TV Disconnect P2...

Page 39: ...and disconnect SC20 on the SC board Measure the resistance between pin 5 of connector P25 on the P board and ground Chassis Yes No Is there a short to ground Replace the SC board Reconnect SC20 and d...

Page 40: ...If the C boards are ok replace the Panel Note B The C board can be checked individually Reconnect the ribbon cables from the A board A31 A32 and A20 for HD models A33 Disconnect the flex cables betwe...

Page 41: ...to making any disconnection or connection LIST OF MODELS TC P42X1 TC P42C1 TC 42PX14 TC P50X1 TC P50C1 TC 50PX14 CAUTION The TV power should not be turned on while SC2 is disconnected This could damag...

Page 42: ...oards can be defective Follow procedure on slides 17 21 to determine which of the 2 boards is defective No Yes Did the number of blinks change Replace the A board No Yes Is the power LED still blinkin...

Page 43: ...ber of blinks change Replace the A board Is the power LED still blinking NOTE The SS board may had just become damaged Shorted Vsus LIST OF MODELS TC P50X1 TC P50C1 TC 50PX14 Start Here 10 times CAUTI...

Page 44: ...prior to making any disconnection or connection LIST OF MODELS TC P42S1 TC P42G10 TC P42U1 TC P42U1 TC 42PS14 TC P46S1 TC P46G10 TC P46U1 TC P50S1 TC P50G10 TC P50U1 TC P50V10 TC 50PS14 TC P54S1 TC 54...

Page 45: ...C P42U1 TC P42U1 TC 42PS14 TC P46S1 TC P46G10 TC P46U1 TC P50S1 TC P50G10 TC P50U1 TC P50V10 TC 50PS14 TC P54S1 TC 54G10 Unplug the TV and reconnect connector SC20 and the ribbon cable between the C b...

Page 46: ...onds until the LED turns off Remove the front cabinet and expose the panel to a bright light for a thorough visual inspection Check for cracks and blown pixels or any other abnormalities Check the ICs...

Page 47: ...ow this procedure when all 3 boards check OK Replace the SU SD and SC boards Replace the SC board Go to the next slide Go to the Slide 16 1 Remove the front cabinet and check for cracks and blown pixe...

Page 48: ...ug in the TV and press the power switch No Replace the SU and the SD boards Does the TV shut down and the power LED blink 7 times A Start Here If the power LED continues to blink even after the TV is...

Page 49: ...place the SC and the A boards Unplug the TV and reconnect connector SC20 and the SU and SD boards Measure the resistance between pin 1 of P2 SC2 or P11 SS11 Vsus and ground Is there a short circuit Ye...

Page 50: ...Code HD Models SS_Flexible Printed Circuit FPC _Detect SOS8_SS TC P42X1 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...

Page 51: ...rd are properly seated 50 HD Models TC P50X1 TC P50C1 TC 50PX14 Make sure that connectors SS53 SS55 SS56 and SS21 on the SS board and connectors SS24 and SS58 on the SS2 board are properly seated Note...

Page 52: ...the panel and the SS SS2 boards Make sure they are properly seated and that the connectors are properly locked Unplug the TV and reconnect SS23 Use a volt meter and place the positive probe on the an...

Page 53: ...Slide 53 8 Blinks Error Code Full HD Models 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 54: ...e that connectors SS61 SS64 and SS21 on the SS board and connectors SS24 and SS58 on the SS2 board are properly seated 50 and 54 Full HD Models TC P50S1 TC P50G10 TC P50U1 TC P50V10 TC 50PS14 TC P54S1...

Page 55: ...problem Disconnect the TV Use a volt meter and place the positive probe on the anode of D280 on the SS board See previous slide for location while the negative probe is grounded Plug in the TV and tur...

Page 56: ...efective Board A Board Replace the A board Warning Disconnect 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...

Page 57: ...erations there s no 10 blinks error code at plug in for 2009 models When the A board is replaced the TV turns on in aging mode by itself at plug in What can possibly cause 10 blinks A Missing Shorted...

Page 58: ...a short circuit Yes No Replace the SC board See Note 2 See Note 3 Replace the P board Is there 15V at pin 7 of connector P6 at the moment the relay clicks No Yes Replace the A board Note 2 If the SS...

Page 59: ...ure that connectors SC20 A33 SC2 P2 P6 A6 are properly seated What can possibly cause 10 blinks A Missing Shorted F_15V B Shorted Vsus C Missing Shorted SUB5V SUB9V BT30V D IC1100 IC9003 IC9004 E Unpl...

Page 60: ...nectors SS11 SS33 SC2 and SC20 Plug in the TV and press the power switch No Yes Replace the P board LIST OF MODELS TC P42S1 TC P42G10 TC P42U1 TC P42U1 TC 42PS14 TC P46S1 TC P46G10 TC P46U1 TC P50S1 T...

Page 61: ...up and stay on No Yes Replace Fan A Unplug the TV and reconnect Fan Disconnect the connector from Fan B Place a jumper wire NOTE A between the center pin Black wire and the pin with the yellow wire o...

Page 62: ...o Yes If the speakers wires are not pinched Replace the speaker Replace the A board Trouble Mode Audio SOS Defective Board Possibility A Board Pinched speaker wire Speaker Warning Disconnect AC Power...

Page 63: ...Disconnect AC Power prior to making any disconnection or connection Communication Error between IC8001 and IC1100 Replace the A board If the power LED continues to blink even after the TV is unplugge...

Page 64: ...TV and reconnect P6 and P25 only Plug in the TV and press the power switch Unplug the TV and reconnect C11 Disconnect C14 on the C1 board and plug in the TV Press the power switch It the TV turning on...

Page 65: ...the power with the POWER button on the main unit or the POWER button on the remote control Key command 1 button Main items Selection in forward direction 2 button Main items Selection in reverse dire...

Page 66: ...the TV for 5 seconds or disconnect the AC cord from the wall outlet To Exit the Self Check Mode Press and hold the Power button on the TV for 5 seconds or disconnect the AC cord from the wall outlet T...

Page 67: ...ry shipment setting To reset the TV Press and hold the VOLUME button on the TV and press the MENU button on the remote control for more than 3 seconds Note All customer programmed parameters will be e...

Page 68: ...on The first 5 numbers out of the two 5 digits groups to the right of Status2 are used to determine the SOS history SOS History A history of SOS occurrences can be found under the Version Menu 0 0 0 0...

Page 69: ...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 70: ...ure gas leakage started at the left top corner Finally gas leakage will lead to the symptom No picture with buzz noise Start Upper or Lower half from front view Upper half Lower half Both area SU Boar...

Page 71: ...Slide 71 The End...

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Panasonic Viera TC-P42X1, Revised Troubleshooting Handbook

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