Re: Can anyone help me identify this transformer?
I can see the pictures in post #1, #5.
I can see the pictures in post #1, #5.
-
Never stop learning
Basic LCD TV and Monitor troubleshooting guides.
http://www.badcaps.net/forum/showthr...956#post305956
Voltage Regulator (LDO) testing:
http://www.badcaps.net/forum/showthr...999#post300999
Inverter testing using old CFL:
http://www.badcaps.net/forum/showthr...er+testing+cfl
Tear down pictures : Hit the ">" Show Albums and stories" on the left side
http://s807.photobucket.com/user/budm/library/
TV Factory reset codes listing:
http://www.badcaps.net/forum/showthread.php?t=24809 -
Re: Can anyone help me identify this transformer?
different browser settings.
hardly the point - the foto's wont last long at that url - i learned that the hard way & stopped using these "cloud" bastards.Comment
-
Re: Can anyone help me identify this transformer?
I know I know, photobucket is garbage........
I feel like I should be checking both the big cap and the diodes for leakage, I read something like if they're faulty a large ripple current will be sent through the cap causing overheating, any truth to this?"You can only learn so much doing simple recapping and fixes. Ideally you want a really hard one to fix where you end up with a lot of dead ends and frustration. Then, and only then, do you learn how things really work."
-retiredcapsComment
-
Re: Can anyone help me identify this transformer?
Upon further inspection it seems that there are a few more suspicious caps I didn't see, could one of these be the culprit?
"You can only learn so much doing simple recapping and fixes. Ideally you want a really hard one to fix where you end up with a lot of dead ends and frustration. Then, and only then, do you learn how things really work."
-retiredcapsComment
-
Re: Can anyone help me identify this transformer?
Interesting development.........
I was able to power up the panel with the case off, turns out it's not the transformer that's overheating but rather the cap circled in this picture, which is on a separate board. The cap was cracked open and burnt so I replaced it but the new one is getting just as hot, and it happens much quicker than I previously thought.
Between this thread and my other one with the displays for this panel, this project is quickly turning into a trail of fail
Last edited by WHaThEFLuX; 05-24-2017, 07:04 PM."You can only learn so much doing simple recapping and fixes. Ideally you want a really hard one to fix where you end up with a lot of dead ends and frustration. Then, and only then, do you learn how things really work."
-retiredcapsComment
-
Re: Can anyone help me identify this transformer?
More shots of the board...
This picture is of a donor board, the cap shown is the one that's overheating on the actual board
Last edited by WHaThEFLuX; 05-24-2017, 07:21 PM."You can only learn so much doing simple recapping and fixes. Ideally you want a really hard one to fix where you end up with a lot of dead ends and frustration. Then, and only then, do you learn how things really work."
-retiredcapsComment
-
Re: Can anyone help me identify this transformer?
Do you have any ideas why the cap is over heatingComment
-
Re: Can anyone help me identify this transformer?
I'm hoping the experts will chime in and have an idea of what's going on.
When I test all those caps on a good board in circuit(not a reliable test) they behave normally(I get a reading then it jumps to OL or just says OL.)
On this board, all of the ceramic disc caps give me a steady reading of ~.500
Something's definitely not right......."You can only learn so much doing simple recapping and fixes. Ideally you want a really hard one to fix where you end up with a lot of dead ends and frustration. Then, and only then, do you learn how things really work."
-retiredcapsComment
-
Re: Can anyone help me identify this transformer?
do you have a scope and/or a frequency counter?Comment
-
Re: Can anyone help me identify this transformer?
I don't unfortunately, it's the last tool I need, the more I work on electronics the more I realize how priceless it is."You can only learn so much doing simple recapping and fixes. Ideally you want a really hard one to fix where you end up with a lot of dead ends and frustration. Then, and only then, do you learn how things really work."
-retiredcapsComment
-
Re: Can anyone help me identify this transformer?
Are you sure thats a cap. and not a ntc thermistor or maybe a MOV is it marked RV? next to the removed RV2 If its a thermistor it will get warm, if its a mov it is most likley badComment
-
Re: Can anyone help me identify this transformer?
It is marked RV1 on the board, here's the specs: http://www.alliedelec.com/m/d/2f6776...201ab01eb3.pdf
I'd understand it getting warm but it's getting burning hot within seconds while the one right next to it is completely cool"You can only learn so much doing simple recapping and fixes. Ideally you want a really hard one to fix where you end up with a lot of dead ends and frustration. Then, and only then, do you learn how things really work."
-retiredcapsComment
-
Re: Can anyone help me identify this transformer?
Which value/part number did you installComment
-
Re: Can anyone help me identify this transformer?
EZRV20D241 - V20241U
It was an exact replacement from another board"You can only learn so much doing simple recapping and fixes. Ideally you want a really hard one to fix where you end up with a lot of dead ends and frustration. Then, and only then, do you learn how things really work."
-retiredcapsComment
-
Re: Can anyone help me identify this transformer?
Its a Transient/Surge Absorber, If its getting hot its getting more than 150v a/c or more than 200v dc according to the specs, It is across the 120v a/c line?Comment
-
Re: Can anyone help me identify this transformer?
Do you have the wiring diagram to find out what kind of Voltage is supposed to be applied to those two terminals?Attached Filesif you find these attachements useful please consider making a small donation to the site
Never stop learning
Basic LCD TV and Monitor troubleshooting guides.
http://www.badcaps.net/forum/showthr...956#post305956
Voltage Regulator (LDO) testing:
http://www.badcaps.net/forum/showthr...999#post300999
Inverter testing using old CFL:
http://www.badcaps.net/forum/showthr...er+testing+cfl
Tear down pictures : Hit the ">" Show Albums and stories" on the left side
http://s807.photobucket.com/user/budm/library/
TV Factory reset codes listing:
http://www.badcaps.net/forum/showthread.php?t=24809Comment
-
-
Re: Can anyone help me identify this transformer?
If you're looking at the picture, the terminal farthest to the right is ground and the other one is 120VAC"You can only learn so much doing simple recapping and fixes. Ideally you want a really hard one to fix where you end up with a lot of dead ends and frustration. Then, and only then, do you learn how things really work."
-retiredcapsComment
-
Re: Can anyone help me identify this transformer?
So that MOV is across the LINE which how it is used, in normal condition it should not be conducting any current at all. It is for protection, not for the operation of the circuit.
So for it to get really hot like that, I would remove it and see what kind of resistance you are getting.Never stop learning
Basic LCD TV and Monitor troubleshooting guides.
http://www.badcaps.net/forum/showthr...956#post305956
Voltage Regulator (LDO) testing:
http://www.badcaps.net/forum/showthr...999#post300999
Inverter testing using old CFL:
http://www.badcaps.net/forum/showthr...er+testing+cfl
Tear down pictures : Hit the ">" Show Albums and stories" on the left side
http://s807.photobucket.com/user/budm/library/
TV Factory reset codes listing:
http://www.badcaps.net/forum/showthread.php?t=24809Comment
-
Re: Can anyone help me identify this transformer?
Panasonic ERZ-V20D241
http://www.mouser.com/ProductDetail/...jQGa7MJQ%3D%3DNever stop learning
Basic LCD TV and Monitor troubleshooting guides.
http://www.badcaps.net/forum/showthr...956#post305956
Voltage Regulator (LDO) testing:
http://www.badcaps.net/forum/showthr...999#post300999
Inverter testing using old CFL:
http://www.badcaps.net/forum/showthr...er+testing+cfl
Tear down pictures : Hit the ">" Show Albums and stories" on the left side
http://s807.photobucket.com/user/budm/library/
TV Factory reset codes listing:
http://www.badcaps.net/forum/showthread.php?t=24809Comment
-
Re: Can anyone help me identify this transformer?
Thanks bud, it's interesting because once I changed it out the same thing happened, you want me to measure the resistance of the MOV? Surely I didn't replace the bad one with another bad one........that current must be coming from somewhere it shouldn't be, maybe I'll test that with a working panel....."You can only learn so much doing simple recapping and fixes. Ideally you want a really hard one to fix where you end up with a lot of dead ends and frustration. Then, and only then, do you learn how things really work."
-retiredcapsComment
-
Hello Community,
I'm attempting to repair the SMPS on a Levoit 600S air purifier. The transformer is likely open. It has six pins. 2 pairs on the primary side (one pair tested open) and 1pair of legs on the secondary side. Legs on the secondary side are spread wide apart (end-to-end). I've circled them in blue. Dimentons of the transformer are 22x23mm. Marking on the transformer are EE16 1.9mH-B. Fuse for the powerboard is fuse 250V 3.15A. I've been unable to find an exact match and I'm hoping for some help here to find a suitable replacment.
Peace
LM...11-04-2025, 09:35 AM -
hello, i recycled a torroidal transformer from a speaker, i want to know how much amps of this transformer, olease help me identify, i will be using this to build my bench psu... -
i managed to break off a transformer from my Imac a1418 logic board when i was mounting it back.
it's this one and i cannot identify it so i can order a new one.
Also it would help if someone can tell me if it could be the reason why my Imac will not start.
The green led is "on " on the motherboard , but when i hit " power on" nothing happens.
i will attach the schematics here.
...11-16-2022, 04:17 AM -
Hello!
I'm looking at an original Xbox PSU: Foxlink ftps-0002 rev. B. The 12 V output is too low, and the 5 V output is too (?) high. Unfortunately I don't have an oscilloscope but only a DMM for diagnosis.
Measured voltages with no load:
After rectifier diodes
12V: 6.17 V
5V: 5.67 V
Secondary transformer pins AC measurement (really don't know if this says anything)
12V: 2-2.5 V
5V: 1.04 V
I also have another (working) Xbox psu from Delta. The same measures there, in order, being: 10.79,... -
Hello All,
i would like to post an interesting topic regarding 3-phase stepdown transformer which we suspect to cause an overcurrent (138A) which resulted to power tripped off of the HV power supply (80KV output).
Problem statement: Power tripped Off
Initial Problem: Found 2 IGBT and 2 rectifier diodes shorted (burnt).
Action Done:
1) Replaced the faulty parts with good spare.
2) Measured impedance of the 3phase input lines and found that L2 to L3 has 23.3ohm while other pairs are 51Kohm. This pins will...
Comment