As above, only thing I can see that's different is the peak voltage capability, the SB5100 is part of a series of three in parallel on a Toshiba power supply, thanks.
-
-
Re: Will a SR506 diode work in place of an SB5100 diode?
No good. Only 60V rated.
Use: MUR460, HER308G, UF5408 as substitutes.
(Must replace >600V, bad Vestel design exceeds diode PIV on startup leading to failure)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. -
Re: Will a SR506 diode work in place of an SB5100 diode?
Thanks, knew as much really. So you recommend up-rating all the existing ones to those you've stated?Comment
-
Re: Will a SR506 diode work in place of an SB5100 diode?
One more question, the existing diodes have a 5 amp rating, I see most of what your suggesting are around the 3 amp rating, does this matter?
I have three STTH302'S at hand, would these be OK considering the 3 amp rating?Comment
-
Re: Will a SR506 diode work in place of an SB5100 diode?
5 amp rating is Vestel's lame attempt to reduce power dissipation, realistically the current per diode is low (less than 1 amp typical), what's killing the ones on this set is poor voltage rating. So 5 amp or 3 amp or 4 amp should not matter.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
-
Re: Will a SR506 diode work in place of an SB5100 diode?
Well, it needed replacing and I now have a very small voltage going to the three corresponding capacitors, problem is it's 0.2 of a volt, just way to low. I have measured fluctuating voltages from various places on the board, especially in the HOT areas, problem is I just haven't got a clue as to what might be causing it, I'll get some photos up later with the voltages I see.Last edited by Dang; 02-23-2015, 09:41 AM.Comment
-
Re: Will a SR506 diode work in place of an SB5100 diode?
A pulsing converter is usually one of a few things:
- short on any output (check all diodes, soldering and check main board/LED driver not shorted)
- bad startup capacitor (small low volt one on primary)
- bad controller ICPlease 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
-
Re: Will a SR506 diode work in place of an SB5100 diode?
Here's a few photos I've taken, there's nothing obviously wrong with it that I can see although I have been looking on the net and a repair kit can be had for this failure, I just can't source any information as to what these components are???
I've found a thread where you(Tom66) express an issue you had with an Hitachi, problem sounds similar to mine, did you ever find out what the cause was?
https://www.badcaps.net/forum/showthread.php?t=35376Attached FilesLast edited by Dang; 02-23-2015, 12:42 PM.Comment
-
-
Re: Will a SR506 diode work in place of an SB5100 diode?
Any ideas on what's in this kit as I'm stuck with this one? I guess I'm going to have to start pulling off components and testing them that way.Comment
-
Re: Will a SR506 diode work in place of an SB5100 diode?
I only know of shorted diodes being a problem. Who knows, could be bad standby controller, startup cap, or something else entirely, you'd have to test.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
-
Re: Will a SR506 diode work in place of an SB5100 diode?
Going to try that start up cap first I think. I did find this website: http://www.ebastlirna.cz/modules.php...r=asc&start=15, seems to give some good information on the problem, I'm still trying to work out exactly what they're saying though
.
Comment
-
Re: Will a SR506 diode work in place of an SB5100 diode?
https://translate.yandex.com/
paste it there.
source is CzechLast edited by stj; 02-24-2015, 06:06 AM.Comment
-
Re: Will a SR506 diode work in place of an SB5100 diode?
, thank you, was using Google translate, just a little disjointed.
I seem to have got to the bottom of the problem, at least very close, I can get the Tv to power up but only if I leave out the screws and lift the PSU up slightly, seems it's something to do with the screw hole very near the Varistor, I did test the PSU out of the Tv completely and found all voltages were there, it's only when screwed down that it shows no power, so my guess is it's an earthing issue, seems to short it out some how, does anyone have any ideas on why that may be?Comment
-
Re: Will a SR506 diode work in place of an SB5100 diode?
I would suggest cold joint - you are flexing the board.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
-
Re: Vestel 17PW05-3, Will a SR506 diode work in place of an SB5100 diode?
Yep, done that already but still no go with all screws in place, with all screws removed and just a gentle lift up, about 5mm, it will work, so there's no flexing.
What I've just done now is actually raise the whole PSU by a washers depth and it will now turn on just fine, so it must of been an earthing fault or something shorting to ground, the PSU is isolated by a plastic backing so I can only guess at what.
Thanks again, been a great help as usual, Andy.Last edited by Dang; 02-24-2015, 07:49 AM.Comment
-
Re: Will a SR506 diode work in place of an SB5100 diode?
MODS, can we please have the model No: Vestel 17PW05-3 added to the beginning of the title to help others who might be having similar issues to mine? thanks.Comment
-
Re: Will a SR506 diode work in place of an SB5100 diode? (Vestel 17PW05-3)
Done
I would be surprised if that is the actual root cause of the fault... it seems unlikely to me.Last edited by tom66; 02-24-2015, 07:57 AM.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
-
Re: Will a SR506 diode work in place of an SB5100 diode? (Vestel 17PW05-3)
Tom66, I'm not clear either, I definitely don't think it was a cold or dry joint, when the board was out of the Tv all voltages were present, when installed without the screws it would turn on only when lifted but as soon as the earthing screw holes made contact with there fixing posts it would cut out, gently lift it up again and back on she went, hence the raising of the PSU slightly. It seems to of worked but only time will tell, I'll be using it for the next few days to see if the fault appears again. Thanks for the title Tom66.Last edited by Dang; 02-24-2015, 08:09 AM.Comment
-
Hello, I am looking for help to replace a damaged diode. The tristar was replaced and a diode was damaged in the process. I have a picture of the diode but dont have an exact donor. I mostly have macbooks for donors and only a few ipad and iphone boards. Diode part number: DSF01S30SCAP
Im not sure where to find the ipad board number. Anybody have an idea where else this diode is used on other boards? Thanks.... -
Hello everyone, I'm repairing an LG TV backlight and I noticed some strange behavior when I touching the backlight strip with a missing Zener diode.
So I replaced the leds on the strips and they seemingly working fine, but soon as I touch the strip which has a missing Zener diode the whole backlight turns off for a few seconds and then turns back on.
Is this caused by the missing diode? If so what kind of zener diode should I use to replace it?.
The led strips has 9 6V leds.
-
Hello everybody☺️ I am glad to be here and looking forward to a good discussion.
First of all, I am new here. Therefore I will shortly introduce myself.
I am Nico and currently I study Physics.
In my freetime I like to build and repair stuff. Especially big battery's.
A few years ago I got myself an electric unicycle, monowheel or however you call that.
The battery bms was broken so I replaced and resolder that. Nothing big.
I used this thing for some years and had a lot of fun. Unfortunately I used it last time in heavy rain. Usually everything... -
Hello Everyone,
I have 1 diode on a circuit that I suspected to be faulty because the forward and reverse bias has a voltage drop reading.
While compared to the reading of another diode from the next channel it won't read at reverse bias.
Now the problem is; it does not have any body marking.
So I tried to sketch the diagram and found out that it is connected to the base and collector of the C3632 transistor.
What do you think is this diode?
Can you please suggest what part number can i use to replace this faulty diode instead?
Hoping that you... -
I was looking at an old battery powered electric lawnmower I picked up as the previous owner didn't want to buy a new board to replace a ruined old board. Tried to study how it was designed - it appears it has a huge 80A contactor...or rather, a 80A relay. It appears to be SPDT to control the motor. A 30A relay protects the circuitry.
The weird thing I don't quite get is how this thing is connected. The common contact is connected to the motor. The NO contact is connected to the battery, which is expected, so when the relay is activated, the common is connected to the NO contact and...
Comment