Funny title? No i truly saved a Panasonic from a maniac.
Last weekend i saw this nice tv on a german auction site. ( Ebay kleinanzeigen ).
It was listed for $30 but it was a 2.5 hour drive. Price was of course ok but the 5 hour drive total.....
Had a day off from work today , nice weather and i thought , lets do this!
Tv was listed as "Its completely dead , no blinks etc".
Got there and the german guy said , well at first it was blinking 7 times and now its completely dead. I was like hmm.....7 blinks to dead?
Gave him the money and hoped for the best. Got home , plugged in the mains and yep , its dead!
I opened the back cover and immediately saw the bad soldering on the y-sus board. ( See pictures ).
The tv had no standby so i checked the fuses but they were all ok. Removed both power supply's , It has a small and big one , and looked at the back of the boards and again soldering......
I have a 50VT30 ( And other Panasonic's ) in parts so i slowly started to replace boards. Replaced both power supply's and still dead! Replaced mainboard and AAAHH , Its alive but cripple. 7 blinks as i expected with the soldering.
So i took a closer look at the TNPA5335 and i was like , Owww boy if this tv is ever gonna work with this board i'll eat my shoes haha. First of all , the soldering. I mean seriously? If you solder like this , please quit! This is barbecuing tbh!
This guy replaced ALL parts with 30F131 , even the part where originally was NO PART SOLDERED , he soldered a 30F131.
He replaced RF1501 with a 30F131 <---
Eventually , it took me the whole evening rebuilding this board with scrap boards. I replaced all bad parts with original replacement parts and i had to replace ALL driver ic's. ( IC501 / IC502 + 5 legged transistors ). I still got 6 blinks after 3 or 4 repairing attempts.
In the end i found a short between ground and C813 , its the energy recovery circuit. Diodes 674/673 + Q661 were short. Removed Q661 and short was gone on both diodes and capacitor.
I also replaced the small resistor in front of Q661 and finally the tv turned on! Picture is perfect.
Will give it its first test run tomorrow and clean up the board + extra cooling. Just look at the pictures. This guy managed to get a 7 blinker so dead that i had to rebuild the y-sus board + replace power supply and mainboard.
How? LOL
I love Panasonic's! Anyways , another one saved from a maniac and will post some pictures of the final board tomorrow!
Mark
Last weekend i saw this nice tv on a german auction site. ( Ebay kleinanzeigen ).
It was listed for $30 but it was a 2.5 hour drive. Price was of course ok but the 5 hour drive total.....
Had a day off from work today , nice weather and i thought , lets do this!
Tv was listed as "Its completely dead , no blinks etc".
Got there and the german guy said , well at first it was blinking 7 times and now its completely dead. I was like hmm.....7 blinks to dead?
Gave him the money and hoped for the best. Got home , plugged in the mains and yep , its dead!
I opened the back cover and immediately saw the bad soldering on the y-sus board. ( See pictures ).
The tv had no standby so i checked the fuses but they were all ok. Removed both power supply's , It has a small and big one , and looked at the back of the boards and again soldering......
I have a 50VT30 ( And other Panasonic's ) in parts so i slowly started to replace boards. Replaced both power supply's and still dead! Replaced mainboard and AAAHH , Its alive but cripple. 7 blinks as i expected with the soldering.
So i took a closer look at the TNPA5335 and i was like , Owww boy if this tv is ever gonna work with this board i'll eat my shoes haha. First of all , the soldering. I mean seriously? If you solder like this , please quit! This is barbecuing tbh!
This guy replaced ALL parts with 30F131 , even the part where originally was NO PART SOLDERED , he soldered a 30F131.
He replaced RF1501 with a 30F131 <---
Eventually , it took me the whole evening rebuilding this board with scrap boards. I replaced all bad parts with original replacement parts and i had to replace ALL driver ic's. ( IC501 / IC502 + 5 legged transistors ). I still got 6 blinks after 3 or 4 repairing attempts.
In the end i found a short between ground and C813 , its the energy recovery circuit. Diodes 674/673 + Q661 were short. Removed Q661 and short was gone on both diodes and capacitor.
I also replaced the small resistor in front of Q661 and finally the tv turned on! Picture is perfect.
Will give it its first test run tomorrow and clean up the board + extra cooling. Just look at the pictures. This guy managed to get a 7 blinker so dead that i had to rebuild the y-sus board + replace power supply and mainboard.
How? LOL
I love Panasonic's! Anyways , another one saved from a maniac and will post some pictures of the final board tomorrow!
Mark
Attached Files
Got a pic of the whole back of the set ?
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