Re: panasonic tx-p42gt30b
Aye--Check Bridge-rec and the MOSFETS....
Aye--Check Bridge-rec and the MOSFETS....
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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! -
Re: panasonic tx-p42gt30b
Those meter readings are from the bridge rectifers in post #34Comment
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Re: panasonic tx-p42gt30b
Will have look at this set today again?Comment
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Re: panasonic tx-p42gt30b
I've just got one of these in myself with nearly exactly the same issue. The problem I found is the two FETS under the heatsink near the blown fuse will be short circuit. Q300 & Q301
These guys do a repair kit http://www.ebay.co.uk/itm/PANASONIC-...-/151415201597 although I'll be sourcing my own parts, I'm a little concerned where they mention about a short in the panel? Anyone know what they mean?
Thought this info might help you
http://www.technciallysmart.co.uk - Some helpful info under Fix It YourselfComment
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Re: panasonic tx-p42gt30b
where can I get the fuse end holders from pictured here
http://www.ebay.co.uk/itm/PANASONIC-...-/151415201597.Last edited by Jahson; 12-13-2014, 05:07 PM.Comment
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Re: panasonic tx-p42gt30b
Or the correct name for them?Comment
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Re: panasonic tx-p42gt30b
I'm not a fan of that solution. I would use a fuse with leads pre-formed. That looks like it could just come loose. They are available on Farnell and CPC: search leaded fuse, 6.3mm x 20mm.Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
For service manual, schematic, boardview (board view), datasheet, cad - use our search.Comment
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Re: panasonic tx-p42gt30b
cheers tom66, could use a bit of solder.Comment
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Re: panasonic tx-p42gt30b
Most fuses won't accept solder. The caps are usually plated.Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
For service manual, schematic, boardview (board view), datasheet, cad - use our search.Comment
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Re: panasonic tx-p42gt30b
These are open circuit part number is T3D 0D if correct, the last D is underlined.
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Location D204-D216Attached FilesLast edited by Jahson; 12-14-2014, 02:47 PM.Comment
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Re: panasonic tx-p42gt30b
these may not be faulty please see
https://www.badcaps.net/forum/showthread.php?t=23214Comment
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Re: panasonic tx-p42gt30b
Cheers vinceroger69, I put them back in then, will start looking at components under the heatshields.Comment
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Re: panasonic tx-p42gt30b
cheers lads, thank the lord I don't have to replace them 33 euros each?Comment
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Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
For service manual, schematic, boardview (board view), datasheet, cad - use our search.Comment
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Re: panasonic tx-p42gt30b
I realise this is an old thread but just wanted to check if the issue was ever resolved? I have a TX-P42ST30b with a similar problem. Started with a 7 blink code, replaced the usualy suspects on the TNPA5330 SC board. On the TNPA5390 P board the 4 amp fuse was blown, replaced it temporarily with a slightly higer rated one as it was all I had to hand (6A or 8A I think?) and it immediately blew again and one of the FETs under the heatsink (Q300) blew as well as the two 8A fuses near the bottom of the board.
Replaced Q300 and Q301 (R6015ANX), replaced all fuses (with correct rating, slow blow fuses), R100 was open so replaced it. When I connected it up the green light starts flashing as usual but when it reached the power on state the 4A fuse blows and it shorted Q300 and Q301 again (these came from RS so should have been decent quality).
Anyone have any ideas where to look next?Comment
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Re: panasonic tx-p42gt30b
I would check the SS and SC boards again for shorts--It may have shorted on one of those--then killed the PSU again.
When trying next time, wire a 250W lamp, (Or enough bulbs in parallel to make 250-300W) in place of the mains-fuse--may save some silicon if it decides to not work...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
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Re: panasonic tx-p42gt30b
Thanks for the quick reply, I need to wait for more R6015 FETs to arrive so I'll check everything again. Regarding the lamp current limiter, would something like this do the trick? https://www.youtube.com/watch?v=UCtzZl5ZcHoLast edited by guando21; 11-21-2016, 08:55 AM.Comment
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Re: panasonic tx-p42gt30b
Sorry to say this ,but your knowledge is not good enough to diagnose the problems
Buy a replacement boardComment
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Hello, I disassembled this dead camera, and found this WTF… Two fuses soldered one above the other !
I was pretty sure nobody touched it before, but that can't be from factory. There is flux, and capacitor is probably missing.
The other weird thing : the fuses are « G » fuse : (0.75A – 8V), seems very low. The original fuse should be « O » : (32V 2,5A).
There is « O » mark beside. All fuses have the same mark letter on main board. So, I can deduce it's a « O » fuse.
And this correspond to the issus I saw : when I plug the battery, I measure the voltage dropping... -
Hello! yes I know there is already lots of information about this issue. I have a Panasonic TC-P55ST50 that originally displayed an 8-blink error code. Following the troubleshooting flowchart, I ended up replacing the SS board. However, even after replacing it, the issue persists. The TV turns on and stays on without displaying an image, and continuity is confirmed on all connectors. What am I missing here🤔?
Ok Im a mechanical engineer ...but I thought I was able to follow a rather simple flowchart for electric troubleshooting 😂.
TV Model: Panasonic TC-P55ST50
...11-20-2024, 08:52 PM -
Hi I wonder if anyone might be able to steer me in the right direction. I have this Samsung UE46ES8000 TV and it went bang during use. The main fuse on the PSU board is open. I've checked every diode/mosfet/transistor I can see and nothing appears to be short to cause the fuse to go. The DC output of the bridge rectifier is not short either. I've seen online that some of these models are known for having their PFC mosfet or other mosfets shorting and blowing the fuse but i'm not seeing that here. If anyone aware of these models having any issues to cause this? I'm reluctant to just replace the... -
Hi guys,
I'm inexperienced with electronics repairs, I've done a little bit of soldering caps and whatnot, but i have a blown fuse on this mimaki printer I got which I have bought a replacement for.
How do I remove this type of fuse (see picture)...it kinda looks like it would pull out of that bracket but it didn't come at first pull and I didn't want to brute force it incase it's soldered on there like most of the rest of the components.
Anybody know how to remove this type of fuse?
(The fuse is toward the bottom of the image labeled F2)... -
I found a project in the electronics trash yesterday. A nice Argon SA1 audio amp with some electrical issue. Took it apart and saw that the 4A250V fuse was blown so started lifting components to find the short. Eventually got to two MOSFETs (model FTA14N50C) that are shorted and when i took them out the short was gone.
Now i didn't have any replacements of the same model of course but i found a couple with pretty similar spec i thought (K10A60D & K12A50D) and put them in. Also replaced the blown fuse with a 3.5A250V one. Checked another time for short circuit and plugged it in....
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