Hello all! I'm very new to this forum and am very grateful for this forum otherwise I would have never figured out how to repair my 4 year old P50S30 plasma!
Everything started with the 7 blinks of death. Google had me believing it was my SC board but after more reading and searching I discovered it was actually my SU board that was bad as my SC passed the SC50 jump test. I used ricosavy's and tw2005's method to confirm my SU was shorted. I also used the P50S30 service manual. I picked up a used SU board off ebay, which are not cheap but I got lucky.
Now, I was wondering how to try to keep this from happening again so soon... I noticed that the GT/VT/ST models all had heat sinks on their SU/SD boards, so I measured some temps of the IC chips on my S30 and ended up with the temps in the images attached (varied from 94-106f after 15 mins of power). The temps were measured at about 76f, room temp. FWIW, the SC board reached some high temps (up to 126f after 15 mins of power).
I decided to add small aluminum heat sinks to the IC chips (except for bottom 2 on SD because I only have 10 sinks) to help with the heat generated, thinking that's why Panasonic added them in higher end models. I also used medium strength Loctite on the SC/SD/SU/SS ground screws. There were one or two loose screws on the SC board!
Anyway, I just wanted to say thank you guys and contribute what little info I have!
Thanks!
FS
Everything started with the 7 blinks of death. Google had me believing it was my SC board but after more reading and searching I discovered it was actually my SU board that was bad as my SC passed the SC50 jump test. I used ricosavy's and tw2005's method to confirm my SU was shorted. I also used the P50S30 service manual. I picked up a used SU board off ebay, which are not cheap but I got lucky.
Now, I was wondering how to try to keep this from happening again so soon... I noticed that the GT/VT/ST models all had heat sinks on their SU/SD boards, so I measured some temps of the IC chips on my S30 and ended up with the temps in the images attached (varied from 94-106f after 15 mins of power). The temps were measured at about 76f, room temp. FWIW, the SC board reached some high temps (up to 126f after 15 mins of power).
I decided to add small aluminum heat sinks to the IC chips (except for bottom 2 on SD because I only have 10 sinks) to help with the heat generated, thinking that's why Panasonic added them in higher end models. I also used medium strength Loctite on the SC/SD/SU/SS ground screws. There were one or two loose screws on the SC board!
Anyway, I just wanted to say thank you guys and contribute what little info I have!
Thanks!
FS
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