diff --git a/content/projects/repair-philips-42pfl6057h-12-again/bga-cracked.jpg b/content/projects/repair-philips-42pfl6057h-12-again/bga-cracked.jpg new file mode 100644 index 0000000..4733cc7 Binary files /dev/null and b/content/projects/repair-philips-42pfl6057h-12-again/bga-cracked.jpg differ diff --git a/content/projects/repair-philips-42pfl6057h-12-again/featured.jpg b/content/projects/repair-philips-42pfl6057h-12-again/featured.jpg new file mode 100644 index 0000000..63723bc Binary files /dev/null and b/content/projects/repair-philips-42pfl6057h-12-again/featured.jpg differ diff --git a/content/projects/repair-philips-42pfl6057h-12-again/heat-it-up.jpg b/content/projects/repair-philips-42pfl6057h-12-again/heat-it-up.jpg new file mode 100644 index 0000000..7ac25b1 Binary files /dev/null and b/content/projects/repair-philips-42pfl6057h-12-again/heat-it-up.jpg differ diff --git a/content/projects/repair-philips-42pfl6057h-12-again/index.md b/content/projects/repair-philips-42pfl6057h-12-again/index.md new file mode 100644 index 0000000..a13420b --- /dev/null +++ b/content/projects/repair-philips-42pfl6057h-12-again/index.md @@ -0,0 +1,59 @@ ++++ +date = "2020-03-29" +title = 'Repair: Philips 42" 3D LED TV with Ambilight - AGAIN' +tags = ["repair", "audiorepair", "philips", "tv"] +categories = [ "Audio Repair" ] +summary = 'This week our Philips TV died. I repaired it before, and it seemed the problem was back.' ++++ + +About a year ago I [repaired a Philips 42" 3D LED TV](/projects/repair-philips-42pfl6057h-12/). I like +this 1080p Ambilight TV quite a bit, so I installed it into the living room where it has been in +service since February 2019. + +Last week, during a period of self-isolation due to the Cornoavirus wreaking havoc around the world, the +TV died again. It has the same symptoms as before: + + * Would not turn on + * No blinking red LED + * Red LED would blink fast on remote control input + +The TV is used intensively. Although it's placed in a well ventilated spot, it would not surprise me +if the Fusion IC had suffered some thermal damage to it's BGA soldering again. + +![Spilled TV Guts](spilled-guts.jpg) + +The back of the TV comes of easily enough and the heatsink, which as a bit loose, came of quickly as +well. + +![Heat it up](heat-it-up.jpg) + +Having learned from my previous repair I used a bit of heat resistant Kapton tape to hold the small +passives around the IC in place. + +Keep in mind that the top of the IC is _designed_ to get rid of heat and you want to heat up the solder +balls underneath the IC. That means I've set the temperature of my hot air station quite high (400°C) +whereas the melting temperature of lead free solder is 217°C. + +After a few minutes of heating up the IC I decided to let it cool back down and tried turning on the +TV. It worked like a charm again. + +## Heatsink solution + +The Fusion IC is decked out with a ceramic heatsink on top and a block of heat transferring foam on +the bottom between the PCB and the metal chassis. + +The ceramic heatsink is held in place by a small piece thermal adhesive tape. Well, it used to be. After +my previous repair I placed it back. It didn't hold, so I used some cable ties to keep it in place. I +should have know the effect of the thermal tape would be lost. This is like sticking a huge copper cooler +on a CPU without thermal paste. + +Well, I'm all for not making the same mistake twice. + +I bought a piece of 25mm x 20m of thermal adhesive tape from Amazon.de. I removed all residue from the +old tape and stuck it back on. This should improve thermal conductivity quite a bit. + +![Thermal Stuffs](thermal-stuffs.jpg) + +After that I put everything back together and we have a working TV again :-) + +![Featured](featured.jpg) \ No newline at end of file diff --git a/content/projects/repair-philips-42pfl6057h-12-again/spilled-guts.jpg b/content/projects/repair-philips-42pfl6057h-12-again/spilled-guts.jpg new file mode 100644 index 0000000..c86a121 Binary files /dev/null and b/content/projects/repair-philips-42pfl6057h-12-again/spilled-guts.jpg differ diff --git a/content/projects/repair-philips-42pfl6057h-12-again/thermal-stuffs.jpg b/content/projects/repair-philips-42pfl6057h-12-again/thermal-stuffs.jpg new file mode 100644 index 0000000..27747da Binary files /dev/null and b/content/projects/repair-philips-42pfl6057h-12-again/thermal-stuffs.jpg differ diff --git a/content/projects/repair-philips-42pfl6057h-12/index.md b/content/projects/repair-philips-42pfl6057h-12/index.md index 48251a4..d117a32 100644 --- a/content/projects/repair-philips-42pfl6057h-12/index.md +++ b/content/projects/repair-philips-42pfl6057h-12/index.md @@ -82,4 +82,6 @@ attached. Next, reinstall the back panel and reconnect the Ambilight cable. And I've got a new TV :-) +**Update 2019-03-29** about a year later the TV failed again. [Read all about it here](/projects/repair-philips-42pfl6057h-12-again/) + ![Working TV](./featured.jpg)