Panasonic Viera Plasma TC-P60S30 (weird blob on screen)

[joeblah]

Hello all,

Someone may know just by looking at the picture, so I'll start with that. The TV turns on, the red LED remains lit (no blinking), but there's only a blob of lit pixels in one corner. The IC (T6VN8XBG-0001) on A board gets really hot after about 5 minutes then it shuts off. Measured 116F with infrared thermometer. I'm thinking panel or A board?

Started by checking for shorts:
P11: Pin 1 to chassis: 8MΩ (Vsus)
P11: Pin 4 to chassis: 15kΩ (P15V)
P35: Pin 1 to chassis: 6MΩ (Vda)

Green LEDs on SC and SS are lit.


P board:
P2: Vsus: 210V
P11: 15V: 15V
P6: 15Vs: 15V
P6: GND: 0
P6: 15Vc: 15V
P6: GND: 0
P6: F15V: 15V
P6: F15V: 15V
P6: GND: 0
P6: GND: 0
P6: F-STBY-ON: 3V
P6: STBY5V: 5V
P6: STBY5V-ON: 20mV
P6: SOS4-PS: 4mV
P6: S0: 0
P6: S1: 3.2V
P6: 1: 3.2V

A board (p/n TNPH0914):
TP3520: 15V
TP3534: 15V
TP3522: 15V
TP3526: 5V
TP5506: 5V
TP9276: 5V
TP9273: 1.2V
TP9201: 3.3V
TP9268: 3.3V
TP5293: 3.3V
TP1110: 4mV
TP4954: 1.6V
TP4953: 1.6V
TP4952: 1.6V
TP4951: 1.6V

SC board (p/n TNPA5399):
TPS0S7: 140mV
TPS0S6: 0V
TP101: 5V
TP98: 5V
TP126: 0V
TP82: 15V
TPSC1: 160mV
UHZ: 5V
TPVAD: 63V
TP57: -117V
TPVSUS: 210V

SU board (p/n TNPA5343):
TPSU15: sometimes 2V and sometimes ~150mV (??)
TPSU16: same as TPSU15
TPSU17: -126V
TPSU18: -131V

SD board (p/n TNPA5344):
TPSD15: 0V
TPSD16: 2V
TPSD17: 1.2V
TPSD18: 0V
TPSD19: 40mV
TPSD20: 55mV
TPSD21: 0V
TPSD22: -131V
TPSD23: -126V
TPSD24: -126V
TPSD27: -5mV
TPSD28: 140mV
TPSD29: 1.9V

SS board (p/n TNPA5400):
TPVe: 135V
VeRef 1: 2.5V
VeRef 2: 2.5V
P5V: 5V
TP057: 0V
TPSOS8: 5mV
TPSS1: 108V
TPVSUS: 210V
P15V: 15V

Panel p/n MC153FU1411A

Thanks for any input!!

Edit: Not sure why pictures are rotated, sorry.

[dskall]

Re: Panasonic Viera Plasma TC-P60S30 (weird blob on screen)

I would think that is a bad panel.

[ReeceyBurger123]

Re: Panasonic Viera Plasma TC-P60S30 (weird blob on screen)

Reseat the panel address driver cable for that area of the screen.

[joeblah]

Re: Panasonic Viera Plasma TC-P60S30 (weird blob on screen)

Thank you dskall.

Hot damn, ReeceyBurger! Re-seated every damn connection possible and now I can actually see the menu. Blob is gone. Still some lines on the upper half, maybe re-seat the SU cables again? Pictures attached. Thank you!

[joeblah]

Re: Panasonic Viera Plasma TC-P60S30 (weird blob on screen)

Edit: 2nd picture gives a better indication

[dskall]

Re: Panasonic Viera Plasma TC-P60S30 (weird blob on screen)

Good thing you didn't take my advice.

[joeblah]

Re: Panasonic Viera Plasma TC-P60S30 (weird blob on screen)

Well, not out of the woods yet. Re-seated the SU connections again to try and fix the horizontal lines. Now the screen shows nothing and I get 7 blinks on the front panel LED. Sprayed the connections with Deoxit. Tried going by the attached troubleshooting guide below. Power board no longer gives any Vsus. No voltage at Vda or 15V either. Vsus to chassis is open. Anyone suspect power board?

[heavymachines]

Re: Panasonic Viera Plasma TC-P60S30 (weird blob on screen)

Try disconnecting y main and x and see if it will power on?

[freakaftr8]

Re: Panasonic Viera Plasma TC-P60S30 (weird blob on screen)

You didn't happen to reseat them with the power on did You?

[heavymachines]

Re: Panasonic Viera Plasma TC-P60S30 (weird blob on screen)

That would be bad.

[joeblah]

Re: Panasonic Viera Plasma TC-P60S30 (weird blob on screen)

heavy, still get 7 blinks with x/y disconnected.

freak, excellent question, I did in fact reseat them with power on. I was tapping the connections and could tell which ones were acting up, so I reseated them with power on. did I nuke something? dumb move!

[heavymachines]

Re: Panasonic Viera Plasma TC-P60S30 (weird blob on screen)

Lcd you can get away with, Plasma no.....

[heavymachines]

Re: Panasonic Viera Plasma TC-P60S30 (weird blob on screen)

Well i am no expert, come long ways since beginning. But if you want to venture and others to help take good clear pics of back of set. BTW Any time you connect or disconnect on a plasma you MUST disconnect power and wait at least 30 seconds for caps to drain before you do anything in relation to connect/disconnect.

[joeblah]

Re: Panasonic Viera Plasma TC-P60S30 (weird blob on screen)

thanks, heavy. as I was re-seating things I didn't hear any pops or smell anything (I know that may mean nothing). P board isn't generating any Vsus/Vda/15V. Attached some pictures. I appreciate any input!@

[heavymachines]

Re: Panasonic Viera Plasma TC-P60S30 (weird blob on screen)

Reconnect X Sustin, disconnect Y Sustin both power cable and flat ribbon see if it changes to 6 blinking lights when powered on. remember safety precautions. Panny calls it the SC but is same as = Y Sustin which is also connected to SU and SD which is also called Upper and Lower buffer boards respectively. in case you didn't know.






EDIT: Details added.

[ReeceyBurger123]

Re: Panasonic Viera Plasma TC-P60S30 (weird blob on screen)

And you killed the buffer, surprised you didnt get a nice shock. Replace the buffer and learn how to test the SC, you almost fixed it lol

[joeblah]

Re: Panasonic Viera Plasma TC-P60S30 (weird blob on screen)

heavy, thanks, tried that, it changes to 8 blinks.

should i just replace both SS/SC? they're only ~$20/each on eBay.

[heavymachines]

Re: Panasonic Viera Plasma TC-P60S30 (weird blob on screen)

No you don't want to start throwing boards at it . You will need a dmm to check for shorts. Reconnect Ymain both power and ribbon. Disconnect SS -Xmain see if code stays same at 8. It is easy to check all the boards for shorts. Youtube how to check buffer boards for shorts.


https://www.google.com/webhp?sourcei...orts+youtube&* click here to watch these basic short tests on different parts of plasma tvs. The basic rule remains the same for short checking boards.


EDIT>Also try changing up the search with different board names to get more specific results.

[heavymachines]

Re: Panasonic Viera Plasma TC-P60S30 (weird blob on screen)

Also wanted to mention you will want to avoid ebay as much as you can and use them as last resort. Order your stuff from reputable sources when you can such as Shop Jimmy. Way Way to many folks selling total garbage on ebay. I have never ever received a bad part from SJ but plenty of junk on ebay even those with perfect feedbacks, usually due to poor packaging or just plain junk with open fuses so you know it was junk before it was shipped. I have gotten some good from fleabay but it's russian roulette more on losing side. My luck anyways and i'm sure others too.

[tw2005]

Re: Panasonic Viera Plasma TC-P60S30 (weird blob on screen)

heavy, thanks, tried that, it changes to 8 blinks.

should i just replace both SS/SC? they're only ~$20/each on eBay.

There's a few ways about this.

You can be surgical and work out what you stuffed or shotgun.

SC,SD,SU would be shotgun approach.

I just had a quick look around and about $40 for the lot plus the postage.

You would not even consider picking up a soldering iron for that cost.

I'd also buy spares while you can and also clean up the grounding points on the SC, either update the bolts to ones with washers and spring washers or tighten the old ones up really firm.

Original issue may even have been a loose SC. This series all fail with loose SC bolts arcing and it blows.

If you disconnect the SD/SU connectors at the SC, remove the SD/SU grounding bolts, then, at the SC, locate SC50 connector, jumper those 2 pins, turn the tv on and if it turns on you have a good SC.

Regardless, if you can get the boards this cheap, stock up with a spare set.

Unless the Panel goes kaput, it's a good size to keep running and you can bet next time you need the parts, there'll probably be nothing around or 5-10 times the price.

http://www.paylesscomponents.com/cat...t/?q=tc-p60s30

I guess it's electroparts for the SC? Should be safe 99% feedback and sold plenty of those boards