Okay so having a strange issue with this kicker amplifier. Fails to power up like power LED kind of flickers. Seems like it's something to do with the protection curcuit. The power supply was down. Soni rebuilt it and it won't fully power up and engage the relay.
Attachments
So other than the power supply being down and severely burnt, missing traces to the pull down resistors. And numous other repairs I noticed this under the preamp board a burnt pin
The output torrid maybe shorted. Someone has had it out before and reused it and siliconed it down. This amplifier is also using the irfp264n in the output section. I don't think they are original?
In photos I have, there are the 264N and the 44N30 (earlier version).
PapaZBill will be able to give definitive answers.
PapaZBill will be able to give definitive answers.
The Output Inductor is toast. You will need to replace it.
In the meantime remove the inductor and if the IRFP264N are not shorted (44N30 where replaced due to obsolescent or sourcing issues) , you should be able to power the amp up and check for rails and drive to output mosfets.
The burnt header pin in Signal Ground, there may be a burnt trace on the bottom of board and on the Preamp board to the RCA shields
In the meantime remove the inductor and if the IRFP264N are not shorted (44N30 where replaced due to obsolescent or sourcing issues) , you should be able to power the amp up and check for rails and drive to output mosfets.
The burnt header pin in Signal Ground, there may be a burnt trace on the bottom of board and on the Preamp board to the RCA shields
what is the value and how do i read or replicate it? I have cores on other amplifiers or one that appears close to this one. I would like to know where to buy the wire and or materials to rewrap these and other inductors. I beleive there is a section in perry's guide that is directly related to torrids and inductors. I will find and read that. Do you happen to know the value? Or can get a replacement one onf these?
The outputs are not shorted. They are still good, and i have a batch of these transistors as well.
Ill check the preamp board as well.
The outputs are not shorted. They are still good, and i have a batch of these transistors as well.
Ill check the preamp board as well.
Check the inductor from the ZX1000.1, that you where previously working on if it's still available. I believe the Inductor value is 47uH, but I'll need to confirm that.
The Inductor you have may be good for testing, but I wouldn't test this with a load until you know if they are a similar match.
The Inductor you have may be good for testing, but I wouldn't test this with a load until you know if they are a similar match.
Is there somewhere that sells inductors prewound at the required 47uH? If not I plan on buying the same gauge and using a new core and unwinding the burnt one and take a measurement of the gauge and length of wire and just rewinding the new inductor from that?
Also need a replacement part for the mospec 30d40d, one had snapped/cracked legs at the base of the rectifier.
Here is the 30D40 link from Mouser
https://www.mouser.com/ProductDetai...apU8LlZDy08hEefW%2bREUSCieDtkHcwBzLnTD2zPFA==
I was mistaken and the inductor value is 80uH not 47uH as I stated in an earlier post. I will look to see if the info on a replacement core is available.
https://www.mouser.com/ProductDetai...apU8LlZDy08hEefW%2bREUSCieDtkHcwBzLnTD2zPFA==
I was mistaken and the inductor value is 80uH not 47uH as I stated in an earlier post. I will look to see if the info on a replacement core is available.
Thanks for that link. My tester is testing the inductors in mH, not that it makes a difference. Ok no ordered the proper 19gauge wire. All ok I have is a 22gauge. Temco is shipping the wire, but I'm also ordering some via Amazon so it's gets here in a day. The core isn't cracked or anything? The amp with the test inductor in place draws substantial current. I was just going to use the core from that good inductor and use the proper size and strat wrapping the inductor.? Is there a difference in cores?
Yes, there are differences in cores. What value is the inductor you substituted? Cores and inductor values are critical and mismatches will cause excessive current among other things.
Can i use th old one or is that not recommended? If not please do send me a part link for the replacement part. i tried to use the onr from the other amp just foro testing and it slowely started to draw current so i shut it of. Ill wait to get the proper part, and wind the new inductor. Measures (test inductor) 0.03mH 0.12ohms
This is the core T157-3. Aliexpress has them at the link below . I don't know if they are a reputable source. Someone else, maybe Perry Babin can verify or recommend another source.
The wire for windings are 4 by ~18awg magnet wire in parallel, with 46 turns Using a solid core equivalent may not be a good option, due to skin effect.
The old core may not be suitable to reuse. I defer to others that have more experience rewinding coils.
Inductors or coils are designed with the circuit in mind and are not usually interchangeable. There are a lot of factors to considered, which include the inductance and core loss at a particular switching frequency and Mosfet selection.
If you can find another 1000.1, maybe one sold for parts only that would be another option. The same inductor was used on all revisions of this amp.
https://www.aliexpress.com/wholesal...13102918&origin=y&catId=0&isViewCP=y&jump=afs
The wire for windings are 4 by ~18awg magnet wire in parallel, with 46 turns Using a solid core equivalent may not be a good option, due to skin effect.
The old core may not be suitable to reuse. I defer to others that have more experience rewinding coils.
Inductors or coils are designed with the circuit in mind and are not usually interchangeable. There are a lot of factors to considered, which include the inductance and core loss at a particular switching frequency and Mosfet selection.
If you can find another 1000.1, maybe one sold for parts only that would be another option. The same inductor was used on all revisions of this amp.
https://www.aliexpress.com/wholesal...13102918&origin=y&catId=0&isViewCP=y&jump=afs
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