Re: Repairing an IPM, replacing 'die' MOSFETS
In all seriousness, a lot of folks would likely love to see pics of the IPM repair.
In all seriousness, a lot of folks would likely love to see pics of the IPM repair.
-
-
Re: Repairing an IPM, replacing 'die' MOSFETS
Fair enough--IF it goes wrong (In all probability it will-- knowing these things,) I'll take some pics.
I have a 50"PC1DA that has a similar issue, when I get to it, I'll take pics of that, if it ends up as the IPM being faulty--same sorta thing....TELEFIX
How PLASMA SCREENS WORK, X-SUS and Y-SUS what they do--
http://www.irf.com/technical-info/appnotes/an-1088.pdf
PLEASE DO NOT EMAIL ME PRIVATELY FOR REPAIR ADVICE. QUESTIONS BELONG ON THE FORUM!Comment
-
Re: Repairing an IPM, replacing 'die' MOSFETS
Hi, resurrecting this thread as I have an old plasma tv (50X3 PDP) with failed SUS IPM. I haven't really bothered with it for a long time as it doesn't have DVB. It was one of the first plasma TV's I bought faulty and an early repair attempt. I bit the bullet and ordered the IPM (didn't buy a pair, maybe I should have). I did a few checks for other failed components then when nothing obvious found installed the replacement IPM and powered up. Set came up with analogue snow and OSD display. I powered off to get my meter and check the VS/VA etc. Next power up.........pop..pop..pop. Bye bye IPM.
Decided to leave it but found this thread, wondering if it might be worth an attempt at IPM repair on this. The set isn't worthy of any more spend and I've really been holding on to it as the PDP itself is fine (obviously never stayed on long enough to check the picture quality). I know a fair amount more about plasma since my first attempts with this thing.
Can you recommend this repair method? Did the repair last?
Due to the set the module is installed in I would probably hold on to the 50X3 PDP to go into something more useful, like a 50PC1D. I would like to get a display on it to check whether its sparkle free.Comment
-
Hi,
Finally got time to fix this board up.
At first it didn't give any POST codes. Turns out it was an unsupported Celeron D cpu. After dropping in an Celery 2.6gHz the CPU came out of reset with clock signal, but still no post codes. For a while it did work when I applied pressure to the ADP3168 chip, but on next reboot the MOSFETs started to burn. Then I left it as is for months.
Now I came back prepared. Replaced the bad MOSFETs and the ADPxx18k drivers. Now I don't get any MOSFETs blowing up issues anymore. But sadly, the Vcore is missing. The whole VRM isn't... -
Hi, I'll start by saying that I'm not an expert and I've reached a point where I don't know what to try/do anymore...
Starting from the beginning: I opened this subwoofer for the first time with a very strong smell of burnt electrical components, I realize that on the amplifier board there is a hole between V+ OUT and GND about the size of a finger, the damaged components were the shorted mosfets, two damaged zener diodes and two capacitors. I bought everything, I fixed the hole by cutting the pcb and putting a piece of a perforated board.
I had no problems connecting mosfets and capacitors,...08-27-2024, 12:46 PM -
Hi!
Managed to get a Gainward Phantom GTX 980 in an auction for a bin with components.
No video out so I started fault finding and found a blown fuse for 3 mosfets. Started checking for shorts and found what I think is a short through all of those 3 mosfets; 0.1 ohms between "VIN" input and "VSWH" output. All mosfets in this gpu are the same ones (NCP5369) with integrated drivers and when I tried measuring the other ones through these ports they were somewhere in the kilo-ohms range.
So, could I safely assume all of these 3 mosfets are... -
I got a 15-IIL05 that failed to turn on BUT IT DID TRY TO TURN ON and then turned off after 30+- seconds, i disassembled it and found a screw loose inside the case.
With charger it turns on, fan spins but gives no image.
Tested main mosfets no short, tested 3.3v,5v,DRAM, CPU etc and they were present.
Reflashed BIOS, same problem.
Replaced both main mosfets.
Checked main mosfets again and i noticed that they closed once the laptop shut down, so i decided to bypass them and used a bench PSU to check how much power the laptop was drawing while trying to turn on, 20v@3A,... -
Hi,
I am working on a pioneer VSX-859. It started with only one problem but i ended up with a lot more. Probably caused by me
Anyway it started with a DSP NG message on the display. That one was easy and was caused by a bad 5v rail. Replaced the capacitors and the message was gone. Everything seems to be working except for a blob sound every time i switched from source. Eventually i tracked that down to a leaking battery on the analog board. Repaired some via's and lines and everything worked ok. That same circuit also caused a not working DCdetect protection. ...
Comment