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Equipment Repairs => PLASMA TV forum => Topic started by: t1412 on August 08, 2017,15:26:17

Title: tx-p50u30b
Post by: t1412 on August 08, 2017,15:26:17

hi fella's has anyone got a service manual for this tv txp50u30b thanks for your time


shaun

Title: Re: tx-p50u30b
Post by: jordan on August 08, 2017,15:59:39

Chassis GPF14DE
https://elektrotanya.com/panasonic_tx-p50u30e_chassis_gpf14de.pdf/download.html

Title: Re: tx-p50u30b
Post by: t1412 on August 08, 2017,16:30:11

top man jordon :c017:

Title: Re: tx-p50u30b
Post by: t1412 on August 09, 2017,04:35:09

hi jordon this model has 7 blinks code haven't looked at the tv yet going this morning thanks

shaun 

Title: Re: tx-p50u30b
Post by: downunder on August 09, 2017,05:09:11

Hi Shaun,

Take a browse through Turnip's recent post "Panasonic TX-P50VT3oB-7 Flash Issue".You'll get a useful guidance on error code 7. Different model but it all still

applies. And if you find a short across connector SC2 on the SC board, check the underside of the mounting screw holes for signs of arcing to the panel.

So that we will have it on file, I'll upload the service manual, designated TH-P50U30A (Oz version).             Bruce

Title: Re: tx-p50u30b
Post by: t1412 on August 09, 2017,05:39:17

hi bruce thanks i've just looked at it, how's it going in the land of oz  :sign0098:     

Title: Re: tx-p50u30b
Post by: downunder on August 09, 2017,06:29:41

Very patchy. Some weeks I'm flat chat, other weeks I'm doing the Times cryptic crosswords - my way of keeping old-timers at bay.

Bruce

Title: Re: tx-p50u30b
Post by: t1412 on August 09, 2017,07:30:21

hi again just been round to look at the tv it's 14 blinks not 7, the woman posted a video but it was a short one haha  :57: could this be the mainboard thanks again

shaun

 

Title: Re: tx-p50u30b
Post by: downunder on August 10, 2017,04:57:12

Hi Shaun,

Code 14 is generated if the is an abnormality during the data exchange with the standby CPU ROM, so yes, I'd say the A board (main)

Bruce

Title: Re: tx-p50u30b
Post by: bgunn on September 29, 2017,11:00:55

Hi,

I also have this model of TV tx-p50u30b and in the process of trying to repair this tv to progress my learning in electronics and repair. I have the following problem and what I have tried to identify the cause but cannot seem to pinpoint the problem board:

1) Turn TV on - green light flashes for a few seconds followed by 7 red flashes.
2) Turn off tv, disconnect SC20, turn tv on - i get 8 red flashes?

I have checked SU, SD and SS boards (FET's, Diodes and buffers) all seem to test okay.

I also tried reconnecting SC20, disconnecting SS11, turn tv on - I get 6 red blinks. I am confused as to what this means. Could someone help me with the diagnosis? Your help would be much appreciated.

Best

Ben

Title: Re: tx-p50u30b
Post by: downunder on September 30, 2017,03:33:04

Hi Ben,

Your error codes point to a failed SC board. Try this to verify:

Remove connectors between SU/SD and SC boards. Remove all screws securing SU/SD and fold the boards away from the SC. DO NOT remove the flat brown leads to the display or you'll spend half a day getting them back correctly. Locate socket SC20 on SC and short out the 2 pins.

Switch the TV on. If the set powers on to a solid green standby light, SC is OK and a green LED should light up on the SC. If you still get code 7, then the SC is knackered. It can cause codes 4, 5, 6, 7 and 10 and not necessarily from shorted FETs &/or diodes. I assume you've checked all of them on the SC.

My only concern is code 8 which is a SS board fault, but it might be normal with SC20 disconnected. Of course, if code 7 is cleared in the above test, then you have a faulty SU &/or SD, but we'll cross that bridge when we come to it. See how you go with that for starters.       -      Bruce

Title: Re: tx-p50u30b
Post by: bgunn on October 01, 2017,03:52:32

Thanks Bruce, I will give it a shot and will update you on how I get on. Thanks.

Ben

Title: Re: tx-p50u30b
Post by: bgunn on October 07, 2017,11:34:04

Hi Bruce,
Managed to get the TV fixed, it was down to faulty SU, SD boards. Managed to source cheap replacements from eBay. All good now. Thanks for your help.

Ben

Title: Re: tx-p50u30b
Post by: downunder on October 08, 2017,04:53:01

That's bonza, Ben. Hope you did the screws on the SC board.

Title: Re: tx-p50u30b
Post by: bgunn on October 10, 2017,08:59:18

Yep, sorted the screws too!