Sundown Audio SFB-2000D Class D Amplifier Repair of Output From a Short
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- čas přidán 14. 06. 2021
- Hello all!
This is a repair video of a Sundown Audio SFB-2000D output section. The trick about these boards is the fact that there are no factory markings on the IC's or the transistors. It's a guessing game! Understanding voltage and current will help to determine the right parts to use.
Thank you David for your business!
Todd
www.ellensburgamplifier.com
ellensburg.amplifier@charter.net
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Great channel. Class D amps are the biggest pain for me. Even with years of electronics experience. Ill have to spend some time going through videos.
Thank you for the support! Class D seems to stump a lot of people who are diving into this repair path.
Interesting, will entertain myself watching, thx for a video! Keep it up!
Thank you! Let me know if there is any information I can help you with.
We both do the same thing and almost have the same name... Cool!
Oh ya! If you need any help I am here.
Thank you for teaching us all nice job it up.!$
Always happy to help!
dealing with this myself on this b2 7500.1 outputs are marked R1 if they were cheaper parts i wouldn't mind poke and hope a couple times but its looking like outputs are going to be around 100 a set depending on which it is.
Ouch! I am assuming the B2 uses quite a few parallel sets on the output? These output FET's are not cheap.
Thank you sir
This amp breaks down so easy mine got toasted yesterday 10 months having it
They do have a rather light thermal mass so if it was driven at 1 ohm or lower, then 10 months isn't too bad.
@@ellensburgamplifier I was running 1 ohm on 2 X-8 v3 sub held up good but amp couldn't handle it hopefully it's under warranty
@@oclaothug69 Hopefully they take care of you with the 2-year warranty. Maybe I should apply to be a repair center for them! If they won't cover you feel free to contact me as these are not too expensive to repair.
@@ellensburgamplifier How much is a repair like this ?? Have same issue SFB1500
@@elchulo706 Thank you for your interest. An email has been sent.
Thanks again! I’ll be sending out another amp soon 🤦♂️
Any day! Thank you for watching and I am always thankful for spreading the word here in WA. Let me know if you have any questions!
@@ellensburgamplifier
Ya this time will be a sundown sae 1100.5
Pretty much same thing happened with positive and negative but this time the positive speaker wire (while car still on connected to amp) touched I think the negative battery terminal in my trunk.
It’ll power on but no audio 🤷♂️
@@deejay2301 Oh my! That may also be just some shorted outputs. I will look online to see if there is any rail voltage information to know what outputs they are using (if defaced). Thank you for your business!
@@ellensburgamplifier
Thank you!
It may be USB Drivers if it's not showing up in Device manager under USB Serial Devices. I'm not sure if that could be it but I thought I would try.
Thank you! After contacting them I found they have released a new version of the software that works with 10 now. I was so frustrated! Thank you for watching.
Great work. I am currently trying to repair one of these amps however my power section has a fault. What's power MOSFETs do they use? What is the H1 MOSFET?
The H1 is the CSD18502KCS. With the power supply transistors removed I would check to make sure that you have a pulse from the gate drive on the scope.
I have a similar problem with the sfb 8000d, I turned the amp on low volume n it said it was clipping then shut off n now it tries to start up but shuts down n the clip light blinks until amp restarts then clip light blinks, it does that until I turn power off. Do u have any idea what could be wrong or any advice??
This got held for review for some reason. Yes you will need to replace the output transistors most likely. Thank you for watching!
There is an 8 pin ic called C12 do you know what it is?
Do you know what triansistor would be on the rail, they are marked s3 and s4 in really smal lettering and there are other numbers above. i have the same exact board as in the video but with other branding.
They are the common cathode and common anode rectifiers. Super fun to find and common to fail.
Hi , I got that power light and clip light is soild but no sound any idea what could be wrong I have checked the powersupply, outputs all good , checked the preamp stage all good
Usually, an indication of a bad output section if you see rail voltage being built.
Hi there I'm wondering if you could help me out I acquired a sfb 1000d that had pop spilt on it at first after Cleaning the protection light (red) was solid after a second Cleaning done myself the amp lights now blink all 3 then the clip light(orange) blink a number of times before all 3 blink again this process just repeats if you could elaborate I would highly appreciate it
That means you have a shorted output section most likely. You will need some new transistors, Zener diodes, and a possible drive IC.
Hi.. i got soundigital 250.2.. output speaker wire got shorted.. internal fuse did not blow... do i need to change all the mofsets??
Is it the SD mini? I would suspect that the transistors would need to be replaced and depending on the design the drive IC needs to be looked at. I would check the drive before putting new transistors in. Most cases you can see a low side drive on the scope with no outputs installed.
I have sfb 2000 Power MOSFET that's a need replaced says B3 I don't see B3 online anywhere what's the best option for replacing the B3???
Is this a power supply transistor or an output transistor?
Do you know if the 4115's would be suitable for the sfb 5k? Original fets were labeled as H9.
Yes, H9 is the 4115
What's the best replacement for IRFB4227??
You may be able to get away with the IRFB4127 depending on the application. Otherwise, there are many vendors that carry the 4227's. Are you not able to get the 4227's?
I’m hoping you can help.
I’m looking at a SKAR 5 channel amp. I’ve heard that their boards are prone to failure because of heat. Do you see a lot of these?
I have had one of the 5 channel amplifiers in. I may have put a video out on it but I can't remember. The one I had in had a burnt trace at the edge of the board around the class D section. It is a thin trace. I am not a fan of cramming a class AB in with a class D in one heatsink. As long as it is driven properly and has good ventilation then I would not worry about heat.
@@ellensburgamplifier thanks! I’ve been in the fence about buying one of these to power the whole vehicle. Currently I have a Kicker Key 200.1 driving the four door speakers and a now dead Pioneer GMX862 bridged driving a 10” 4 ohm sub. My other options are a Sound Ordnance 350-1 or a used JL Audio 360/2. Thanks again for the input!
Would you happen to remember what size fan is in the amp? Mine is going bad and I would like to replace it myself with a Noctua or similar fan.
You bet they are the 40x40x20mm fans.
@@ellensburgamplifier Thank you very much. 👍
Are you located in WA . State like I think ?? I have an sfb 2000d that burned up some transistors on the opposite side of. The one in this video I would like to have it fixed or at least the parts identified.thanks
Indeed right in the middle of Washington. www.ellensburgamplifier.com/request-a-quote is where you will find the form to submit a request. Thank you!
How long does it take to get your amp back if its under warranty
I keep the turnaround time posted on the website. I would list it here but it changes weekly based on the volume of incoming amplifiers.
Im about to order transistors but seeing as these blow for no reason all the time is there maybe an alternative to the 4115 that might give a little more headroom or lower Temps?
The drive topology is what dictates the transistor. It takes quite a bit of trial and error to incorporate a different transistor that is stable with minimal changes to the resistance and capacitance of the circuit.
@@ellensburgamplifier thank you for getting back to me. I can't find anywhere that has irfb4115 in stock. Is the voltage or current rating more important to match? Also is there any way to protect the rest of the amp while I experiment with different fets?
@@kymcochran5581 Transistors can be a nightmare to locate. I work with several distributors to get what I need. There are several key specifications that you should try to match. Rds on, capacitance, speed. You will know when you are close as the transistors will not heat up when you start it. If the specifications are too far off it will heat up almost instantly or it will start to heat up significantly under load. Watch the scope as it will tell you a lot about how the gate circuit is reacting to the transistors. I don't suspect you will damage anything but of course if you are too far off on specs you will damage the drive components.
Hey, hoping you’ll see this, I have a sundown SFB-3000D, I went to drive my car one day and the amp was dead. The power/clip/protect lights just flicker, any idea what the issue could be and if it it’s repairable?
Sounds like a fault in the output section. For the most part they are repairable. These guys deface their ICs which can make a little difficult if it's not the standard faults.
any idea what size fan that is? I think it causes noise in my tweeters/ Maybe replacing it would help
I do believe it is a 40x40x20 fan. That would be odd if it was causing noise through the output as it would have to make its way through the output inductor. Unless it is noise in the 12 volt supply. One way to check it is to de-solder the red wire (12v) of the fan off the board and re-check for sound.
@@ellensburgamplifier I seem to only get that sound from my super tweeters when running full bridge amps I dunno if its the sensitivity level of the tweeters or what ugh
@@rexnhogz Noise is an absolute bear to track down. I had the same issue years ago when I had my installation end of the business. One of the many headaches to overcome.
I have a weird one, Sundown SFB 1k and it turns on plays but smokes. I opened it and noticed the white silicone on the big red coil is the one that starts to smoke.
The output section needs to be rebuilt and you may have a shorted inductor.
@@ellensburgamplifier The outputs dont look fried nothing looks fried on the board. I accidentally dropped it and im guessing thats what caused it to do that.
@@GorillaKnobzUSA It will either need to be replaced or the short isolated but luckily it is a small one.
I have a sundown 200 by 4, can you tell me what the transistor number is
Do you happen to have the OEM marking of one?
i have a sfb-2000d my rectifier or my transistors located as "s4","s3", and possible "Q12" are no good what transistors can i use to repplace it
I don't have a close-up picture of the board to know which ones these are. If you are able to send me a close-up picture of the board and the area of the suspected bad components then I will be able to assist you in this. www.ellensburgamplifier.com and in the top corner if you click on the quote tab you will be able to send them to me.
@@ellensburgamplifier whats your email address and i can send the pics
@@JonathanRodriguez-ks9ny www.ellensburgamplifier.com and you will see my direct email in the contact information or you can send pictures through my quote form.
Where do you buy your transistors
Mouser, Arrow, Digikey, LCSC, and I do have a few overseas connections.
Hi there, I bought a SFB 1500 from a dealer and got stiffed, as soon as I hooked it up it cycles between blue, clip and protect and it seems to overheat even when the vehicle is off. thank goodness I caught it in time. Is it to late for this amp or can I try replacing the output transistors? If so can you recommend what transistors to buy and where I might get them. Thanks
The thing with these boards, in most cases, is there are more things to replace than just the transistors. If you let me know what the transistors are marked as I may be able to tell you what they are.
I'm sending it to amp lab, they're going to probably do a better job than I could. Thanks for your response though.
@@TheRepos296 better to put it in a pillow case and bash him over the head a few times
I have the exact same amp with the exact same problem. Clip light stays on and has no output. What's a good price a shop should charge me to fix it?
When I was servicing these the average charge was $60 to $130 depending on the faults.
Wow thank you very much for this video because am working on a sundown Sfb 3000d that used a H6 output so am going to try the irfb4115 and I'll let you know if it works i owe you a drink keep making great videos
Thank you for the comment. An easy way to know you are in the right ballpark for the transistors is to compare the rail voltage to the voltage of the transistor you are looking to use. From there matching the specs (current, RDS, Capacitance, etc.) will help pick the best fit.
@@ellensburgamplifier Hey good morning sir the irfb4115 works for the H6 output in the sundown SFB 3000D wow thank you very much i owe you one 🙏 🙏.
@@cartycartyamplifiersalesrepair Excellent! I should keep a running list of the matching transistors to the factory proprietary markings. If you know which IC is used for the power supply transistors from the PIC please let me know so I can add that to the books.
@@ellensburgamplifier Ok I'll keep in touch
@@ellensburgamplifier you ever make that list?
I have one that also needs repaired are you able to do it
In most cases, yes I can repair these. www.ellensburgamplifier.com/request-a-quote is the submission form if you are interested.
Hi what is the h1 alternative
H1 is the CSD18502KCS
What part Washington you in?
Thank you for asking, I am located in Central Washington
Please specify the power supply gate drive ic number(8 pin ic)
the UCC27324/524 is the most common and a person can also use the IR4427 depending what current requirements are needed.
Thank you so much for your answer.🙏
Working on an 8k clone like this. Have replaced all output fets, 20957 drivers, driver buffer ic's and auxiliary power ic's. Now the clip light will blink about 10 times and on the 10th the power and protect lights also come on. At that point it pulls a little more current like it's trying to turn on but doesn't. Any ideas? Any help is much appreciated.
Did you replace the zener diodes? What is the resistance value across each output transistor gate to source? I quit working on these quite a while ago so I don't remember exactly what is involved but I do remember the Zener diodes being a clip light issue.
@ellensburgamplifier I finally just figured it out and it was actually my own fault. Lol. I had one of the drive buffers turned the wrong way. So tiny it's hard to see the dot. There was a bad diode next to it also. Not sure if it was caused by that. Replaced both and put on correctly and now it's working. I think it's time for a break now. Lol. Thanks for the help.
Hey what’s up I have a spf 2000 and the positive speaker output is burn what can be done
Is the terminal itself burnt or melted? If so the best thing to do is to find a broken, blown amp of the same model and switch out the terminal. This also allows for other additional parts like the drive IC's and transistors.
E'burg Amplifier Repair just burnt I don’t think it’s melted it automatically goes into protect when u give it juice
@@matthewmoody4423 It will need 4 new output transistors. Those are the first thing to go when the output gets shorted.
Do you happen to know what an H6 output mosfet would be on a clone like this? I haven't seen these yet. It's for a 3k watt @ 1 ohm.
H6 is an IRFB4227
@ellensburgamplifier you are awesome sir. Thanks for the quick reply.
Repairing the same amplifier. Smoked power supply, replaced fets and gate resistors. Currently dont have any signal on the gate. Any idea what the drive ic part # is?
The IR4427 I do believe.
@@ellensburgamplifier TX alot. This is what I suspected but wasn't 100% sure.
@@camaro1eclipse Any day! I think you can even use the UCC27524 if you don't have the IR4427 on hand.
I need some help. I have the sfb1000 amp running a SA classic on 1 ohm.
the amp keeps clipping. I sent it to sundown for testing. they said amp is good and issue is cause by bad rca signal from the radio and music source bluetooth. They said it was premature clipping.
Is there such thing?
How do I fix this?
It is possible to get into clipping at 1 ohm depending on several variables. I will usually see clipping when there is a drop in voltage or available current. I doubt a bad input but could be a high input voltage? It is hard to say what the issue could be without knowing a lot of details about your system.
@@ellensburgamplifier my system is basic. my car is 2021 subaru outback. im using the factory radio, factory battery, factory 190 amp alternator. My power cable are 4 gauge ofc/cca hybrid from scosche with 100 amp fuse. One sundown sub.
I tap into front and rear speakers for rca signal. I tried both audio control lci2 and a basic kicker line out converter. both premature clip. before the sundown i was using a skar rp800 amp at 1 ohm and it work good, no issues. nothing changed from my setup beside the new amp. I set gains with DMM to match ac volts. I measure power/ground and speaker voltage on the amp terminal. both above 14 volts.
@@ssc7453 It may be the amp? I am not sure without getting it on the scope but if your voltage and current is holding steady then I would suspect an issue in the amplifier pre-amp.
I have a sfb 1000D that needs repair went into protect won't come out
More than likely a shorted output transistor or two. Not too expensive to repair. Do you have experience using a DMM?
Yes
@@oshaymcdonald8792 If you are able to track down the number of low resistance transistors and multiply by $3 (replace all parallel transistors) will give you a rough idea of cost.
Can you please tell me the reference of the H6 mosfets and the S1 and S2 that are located next to the H6 of the same amplifier thank you greetings from Colombia
The H6 is the IRFB4227 and the S1 and S2 are the rectifiers. I don't have notes for them but one is a common cathode and the other is a common anode.
Thank you very much friend, greetings from Colombia
@@fabiancelis7463 Any day! I use the MUR1640CT and MUR1640CTR for the TO220 rectifiers.
Hey man. Really appreciate your videos. I have a sundown sfb 3000D. Same situation with the sfb 2000 u worked on in video. I have 2 bad H6 mosfets. I am trying to fix them and want to make I purchase the correct mosfets in there place. Any insight would be so amazing. Thanks alot
LCSC.com has the IRFB4115 transistors in stock. I am not sure what the status is here in the states for them but I see Mouser is out and so is Digikey.
sali de mi duda. conel c5 cual era el renplaso tienpo buscandolo
i bought this amp off of ebay and the people screwed me on it is htere anyway you could repair it
As long as the amplifier is complete with nothing missing I may be able to get it up and running for you. www.ellensburgamplifier.com/reuest-a-quote to get started.
I have a SFB 8k and was wondering if you can tell me what it means when the power (blue light is blinking) but won’t put out any sound, got a lil warm when I was bumping on it (no clip light at time of bumping) then it just shut off and blue light keeps blinking 😢
That is a shorted output section.
@@ellensburgamplifier ohhh nooo 😱😭😓 dang itttt guess I’m going to need to get my amp repaired 😫 but thank you very much for the response
@@texasbasshead8289 They are not too bad cost-wise to repair if you choose to use E.A.R.S.
@@ellensburgamplifier I might have too how would I go about shipping from Texas? You’re located in Washington? (I also have a Skar RP2K that would need repairs too if all goes well with my SFB)
@@texasbasshead8289 www.ellensburgamplifier.com/request-a-quote is the first step. Shipping isn't too bad if you someone like pirateship.com as they have some of the best rates possible.
Hi Todd , i have and identical clone amp instead have 2 transformer H1 mosfets , have the same problem 1 Bad output mosfet -H6- replace all four with news , have nice square wave but i noticed they are getting pretty hot., what could be wrong , any idea? Have 117volts on rail
Are the IRFB4227 (H6) transistors you installed authentic? If the gate/source resistance values are on par and the same, then I would be looking into the transistors used. Did you also replace the drive IC?
@@ellensburgamplifier the IC driver could be bad?? , even it both square wave are presents ?! ...
I bought "originals" H6 marked mosfets , but i dont know have me thinking , they have C=11nf , VT=3.5V
@@ElectronicaChrisJoel Did you compare the specifications to a transistor that did not fail? Heat can be from a few things such as cross conduction, duty cycle, switching freq., improper transistor values, shorted or cracked inductors, etc.
@@ellensburgamplifier thanks for that info , i changed the driver from the side mosfet fail , and now they are little bit warm , check resistors specially 10ks are fine , duty cycle at 50% on both , inductor fails even i have sinewave at output terminals , great day 👍🏽
I have this amp also.what is your starting cost to see if it can be saved?
I don't charge by the hour or have set costs. I charge by the job. www.ellensburgamplifier.com/FAQS I don't charge to diagnose and quote amplifiers. Feel free to contact me. all of my contact information is at the bottom of every page on my site.
There is an 8 pin ic marked C12 do you know what it is?
Speaker wire touched now clip light stays on…worth repairing?
I think they are worth fixing if you like the amplifier. I may be able to get you fixed for as low as $50 so it depends on how much you enjoyed running it.
I have a few amps same problem I’d like to get repaired?
could i ask you even after many many time......do you known the code of the other unmarked ic's....???like c3,c4,c8 ic,s??
thanks for your tme waste...!!!!!
I think those are the pre-amp ICs. I don't have any reference to them as they are typically ones like the 072, 074 op-amps or the OPAs like on Taramps boards. There are also 5 pin ICs that are PWM ICs for the auxiliary power supplies.
Hello Sir, I could certainly use your help. First I bought this amp, the sfb 2000. During initial install my helper wired power and ground backwards. I was running wires under hood. Anyways hooked up the power and immediately burnt up the amp. Ok then I went to local Sundown dealer and bought same exact amp. It was working fine until clip light stayed on constantly. So I have $600 invested and no sound. My next step is to replace output transistors in burnt amp into clipped one. Never done it before, but I'm confident I can swap them out if in fact that's the issue. Can you give me some advice or suggestions? How much do you charge to repair them?
Hooking an amplifier up backwards just takes out the power supply. The clipping is more than likely an output transistor but you would need a scope to verify the drive. If you were to send both in to swap parts then you are only looking at a labor and load test fee of aprx. $25 otherwise transistors are $4.75 each installed.
@@ellensburgamplifier ok I can do that. Would you mind replying with all necessary info? Thank you.
@@michaelscott1400 If you wouldn't mind filling out my form or shooting me an email (info found at www.ellensburgamplifier.com ) I will get back to you directly to avoid spam and scammer potentials.
Sfb 5k. In the aux power sections there is a small round smd inductor labeled as 100 on top of it. Is that a value of 10mh? Also do you know where I could possibly get any or is it possible to replace this with a different component? Thanks.
That will be a SMD 10uH inductor. There is a little trial and error when buying them. Mouser has them in stock.
@ellensburgamplifier great. Thank you very much. This is only the 2nd amp that I've been this deep into the repair. Got the 1st one fixed and finally getting this one figured out too. Appreciate the help.
Is there any certain way I can tell if the pic is bad? It looks like I should be getting something from pin 11 but nothing at all. I'm also not getting the input sine wave to pin 3 and no pwm at all to the 20957's. I have replaced every ic and tested almost every component. Rail voltage and everything else looks good. Any idea what I could be missing? This thing is driving me nuts. Lol. Thanks
@@hopskustomaudio Without a print one will never know if the PIC is good or bad since you don't know the functions. What IC are you referring to about pins 11 and 3?
@ellensburgamplifier pin 11 on the programmable ic that controls everything and not getting any type of signal on the pin 3 (input) on either of the 20957 drive ic's. So no switching on the output fets.
Hey have done any work on the sfb 5k I'm looking at h9s. Trying to find a good match.
Are they TO220 size? Also, what is the voltage rating of the rail caps?
@@ellensburgamplifier I have no idea how to test the rail voltage
I'm go with TK17E80W,S1X and hope
@@marvinautoworks9955 What is the number on the large capacitors? It will say the voltage on it. I will bet either the IRFB4127 or the IRFB4227 possibly even the IRFB4115. It all depends on the voltage stated on the capacitors.
@@marvinautoworks9955 The current ratings are too low to use those with slightly high Rds on value.
Where can I get that part
Which part are you looking for?
E'burg Amplifier Repair the one you where talking about in this video cause my input and output touched
@@frogassassin1587 www.LCSC.com has them in stock at this time. IRFB4115 for the output and IRFB1405 for the power supply. You may also need new drive ICs and zeners for the output if it does not start up.
E'burg Amplifier Repair I’ll see what I can do I can see what burnt up is there anyway I could send you photos to see what you think
@@frogassassin1587 Sure can! If you are able to see the description of the video you will find my email address there or www.ellensburgamplifier.com
I went to check output voltage and the amp cut out and now my clip light is on , no output voltage
Sounds like the output received a short while checking. With the clip light on, it is saying there is no output switching.
I believe one of the multi meter leads grounded out on the aluminum case . Would that be covered by the warranty. .and if not what would it cost to fix it
I just mailed my amp back today
@@stevenmeadows7769 Unfortunately that would not be covered. Did you send it to Sundown? I would not know the exact cost to repair as it is dependent on what needs to be replaced. Average.. $75 to $125 (as of 7-22)
Yeah sundown
Did you find out the full name of the b2 transistor?
I have B2 noted as the IRFB4115
@@ellensburgamplifierthank you.. unfortunately my s4 and s3 is blown as well. Do you have the s4 and s3 name?
@@lorenzongwai3993 Those are common cathode and common anode rectifiers. I use the 2040 rectifiers or the 1620/2020 rectifiers depending on the rail voltage or ratings of the rail capacitors. Good luck on the hunt!
Manage to find 1640ct and 1640ctr but not sure where they go
@@lorenzongwai3993 The "R" usually indicates common anode which the center leg would be the negative side of primary capacitors or ground reverence. The middle leg of the "CT" would be going to the positive side of the primary capacitors.
these amps are trash no joke the skar rp series are better.(which is pretty bad but they are solid half bridge design).. sundown is throwing their name in the dirt with these brazilian amps... not the same quality as taramps and soundigital...
I have seen some interesting failures with this line of amplifiers. In most cases, I can not explain why the failure occurred. I also see these getting wired to the most extreme low impedance conditions that these amplifiers will not tolerate.