Trouble shooting and repair of a Rockford Fosgate Old School 400.4 car stereo amplifier. Hey I enjoy repairing electronics as a hobby, and decided to video some of them to hopefully help other people repair things too.
Пікірлер: 135
@LosmiPZS Жыл бұрын
You definitely deserve more subscribers. Everything clear and concise. Good job 👍
@joerojas13962 жыл бұрын
Damon you always provide great information on old school RF amps
@moxysoft5 жыл бұрын
Love watching the Vintage Rockford Fosgate get repaired! :-)
@troymayne75213 жыл бұрын
I need my fosgate 800a2 fixed
@howiefelthersnatch36084 жыл бұрын
Awesome video. Very helpful, please do more. You explained everything in full detail without rambling on.
@Crazylogix0074 жыл бұрын
Thanks!
@LiLthirtSty5 жыл бұрын
Man I love the old school content nobody's doing repair videos of old school repairs like you do looking forward to the PPI,soundstream,kicker etc 👌
@Crazylogix0075 жыл бұрын
If you mean the remote turn on terminal, the part can be found at Digikey (and others), their part number is A112006-ND. That is the short length one that fits most amps, I have yet to find the long one instock.
@LiLthirtSty5 жыл бұрын
@@Crazylogix007 wrong guy buddy just wanted to give u a heads up
@Crazylogix0075 жыл бұрын
@@LiLthirtSty thanks, must have misclicked, fixed it!
@strictlyamps8205 жыл бұрын
Nice video, you are definitely right about "Heat Sink Compound", I think every time I open an amp I .wipe off the current compound and put down new. I also replace the thermal pads with Kapton tape. Ready for the next one.
@theodorejezowski73094 жыл бұрын
Here I am using more than one word when only one is needed....Nice! Thanks for the vid. I am starting to repair car amps and from what I see, your videos are going to be very informative and top notch. I think I have found a guru who is on par with they guy who taught me how to refurbish tube audio equipment. I am looking forward to seeing some more of your videos, keep up the good work.
@Crazylogix0074 жыл бұрын
Thanks! I love learning each brand and model!
@lisapaulparsons95492 жыл бұрын
You are an electronic ninja! Thankyou
@johncrankshaft28864 жыл бұрын
I have what i thought was a RF Power 301s since 2004, barely today as i was cleaning it realized it is actually a 551s; after 16 years this thing still works and is about to power its 4th set of subs
@daveydave98845 жыл бұрын
More old school rockfords pls. And more detail on the output drive circuits and setting bias also 👍🏻
@jhenry86994 жыл бұрын
You are the man, thanks for the great video and detailed instructions.
@Crazylogix0074 жыл бұрын
Glad to help, and thanks!
@ogairbender8084 жыл бұрын
Love your explanation of this ,what a wealth of knowledge
@Crazylogix0074 жыл бұрын
Thank you kindly my man!
@chelle3153 жыл бұрын
Wow! I have a Punch 360a II! I love old punch amps!!
@matthewstorm51886 ай бұрын
One thing I’ve noticed is that many of the old DSM/IX/x2 series of amps don’t use thermal compound. They use some sort of material between the transistors and heatsink that looks somewhat like cardboard. And these are amps with intact warranty seals, so it’s DEFINITELY from the factory. Not sure if this is something that deteriorates with time.
@Crazylogix0075 ай бұрын
It should be thermal compound, promise. It can be really dried out and just crumble.
@thomasmaurer10973 жыл бұрын
i have this amp in my truck right now, its fully working, a friend gave this - after looking for one- I'm younger (I'm 33) and never had an A-class amp, and the stories from the old guys are true, its better sounding than the new ones = and they don't make one that compares to these old ones anymore - sound quality is equal to a PSaudio amp... if you could buy one (good luck) pick it up .. audio-files buyers
@Hoppysjunkyardrally5 жыл бұрын
ill try to act surprised... hahaha love it. great videos keep them coming. personally I like how you shoot the videos..
@Crazylogix0075 жыл бұрын
Thanks!
@Dcelrod3 жыл бұрын
@@Crazylogix007 would you be interested in working on an old rockford power 1000bd amp? My email is dcelrod2011@yahoo.com.
@Dcelrod3 жыл бұрын
I have an old rockford power 500.1bd that has a problem so looking forward to seeing if I find the fix on your vids. It would power up for just a couple seconds then the power light would go off, it did that a couple times then the power led quit coming on all together.
@Crazylogix0073 жыл бұрын
The old BD amps are very different than the class A/B amps. I have two to work on, but it will be down the road a bit.
@theodoredelatorre63243 жыл бұрын
Nice vid. Great info and straight to the point...thanks for the shared Knowledge...it would help a Lil if u said if it applies to most amps in general or the one u working on specifically
@Crazylogix0073 жыл бұрын
Thanks, I am sure I will get better at it as I go.
@beerggls3 жыл бұрын
Great stuff, I learned something! I didn't know Hickok45 was into diy car audio repair.. 😆
@Crazylogix0073 жыл бұрын
😁
@awaazhoosein6565 Жыл бұрын
Hi sir I have one like that when I put it on the mosfet started to heat up when I take off the remote wire and put it back on several times then it came on good and working I change the driver ic 494 but same thing
@josephhenson8282 жыл бұрын
I bought a 301m and the guy had it in his truck and took it out and sold it to me. He didn't have the car running or anything he did it properly, but I've never gotten it to work since.
@ilyakuznetsov71343 жыл бұрын
very helpful, thank you!
@chrismigl274 жыл бұрын
You are my new hero! I’m hoarding up some of these and you are doing the exact one I own in this video and just picked up a 500.2 that is untested. Great info thrown here and love that you explained so that a beginner/novice can understand or learn from. I took electronics but was so long ago my Dean was Benjamin Franklin Moving on your next vid before popping the covers on the newest acquired. Do you have the specs for the potentiometer for the punch control by chance? I have one I can take apart if not. Thanks again
@Crazylogix0074 жыл бұрын
Thanks Chris! More to come, just been super busy. If you mean the remote base control, there are several depending on the amp. Look on Rockford Fosgates support site to find the knobs and know which one is for your amp. I am working on collecting one of each and reverse engineering them so that I can do a build video on them in the future.
@chrismigl274 жыл бұрын
Crazylogix007 looking for the one for this model which is discontinued. They are out there but can go for as much as the amp itself. Got the specs off of the one I have and ordered the parts last night so I’ll see how that goes👍🏻🤔🇺🇸
@Crazylogix0074 жыл бұрын
@@chrismigl27 awesome! If you don't care to send the specs and good pictures, I would appreciate it. My email is my KZfaq name at gmail. Thanks again!
@arnoldromero84734 жыл бұрын
You are very knowledgeable and do a great job where you located and do you work on other people's amps
@Crazylogix0074 жыл бұрын
Southwest Missouri, right now this is a hobby and I just work on my own and friends amps. Maybe someday soon I will open up more. Just too busy right now to do more.
@ronsinecoff75262 жыл бұрын
Got a p1000×2 turns on wont play! Was my buddy's don't know what he did but what can I look for?
@andrewclark26725 жыл бұрын
Would be awesome to see you repair a Rockford 450s. I have one that is blown, mosfet issue. Can't find anything on it. Seems like a rare amp.
@Crazylogix0075 жыл бұрын
A lot from this amp and many coming up will be very similar to your amp. Watch the videos that show the initial testing to start troubleshooting your own amp. Once you get into it you should be able to focus on the videos that deal with repairing what is dead in your amp.
@andrewclark26725 жыл бұрын
@@Crazylogix007 awesome. I just repaired a Taramps HD3000 your video was helpful. My Rockford 450s the mosfets are blown, can't find the part numbers due to the mosfets exploding so no more numbers.
@Crazylogix0075 жыл бұрын
Is it the power supply fets or the output fets?
@andrewclark26725 жыл бұрын
@@Crazylogix007 not quite sure. I believe power side. They are closest to the power and ground input. 2 on positive terminal side and 1 maybe 2 one ground side. Just for reference. Do you have any social media where I can send you pictures?
@Crazylogix0075 жыл бұрын
@@andrewclark2672 Join this group on facebook. Old school amp repair guidance and Q&A
@carlosgonzales14192 жыл бұрын
I have a few amps I bought that didnt work. I've been wanting to fix them. Thank you for your videos. But if anything how much do you charge to fix one
@iconoclast5185 жыл бұрын
Thanks for doing this, would be nice to see some old kicker ZR/ZX amps as they have their fair share of problems and are quite common.
@Crazylogix0075 жыл бұрын
I think the only kicker I have of those two models is a ZR240, and it works perfectly, they are tanks! 2 x 40 watts RMS.... yea right, Big D Wiz tested one i believe, was doing over 500 w mono.
@kristaldebarge10332 жыл бұрын
Thank you, and thank you for responding to my last message. I’ve got a kicker 700.5 if your interested in doing I think it has a dead short. Or if your interested in purchasing I have a lot of blown amps fosgate 600.1 1000.1bd, 1500.1 bdcp , infinity 1600a this is my passion as well and I really enjoy watching and learning from you. Thank you for all the knowledge and experience you have to offer.
@darrellhenderson1459 Жыл бұрын
@@Crazylogix007 I got a 240 on some skar 10's and sounds good that 2x40 is a joke
@darrellhenderson1459 Жыл бұрын
@@Crazylogix007 I got a 240 on some skar 10's and sounds good that 2x40 is a joke
@justinmorris82332 жыл бұрын
“Awesome” !!! I am subscribed and will be viewing everything! Very detailed and informative content! I’ve been a huge car Audio enthusiast for a long time! I’ve recently started looking into rebuilding subwoofers and had a few blown amps laying around. I’ve opened up a punch 500x and found burnt spot on the board! Would appreciate any help with this greatly!
@Crazylogix0072 жыл бұрын
Watch the video, learn to test for blown fets/transistors. Learn to identify the 3 major parts of an amp, power supply, output section, preamp section.
@cebb25432 жыл бұрын
Do you fix these for people punch 45 w/tm on sticker no output but powers on
@rolandoantunez20014 жыл бұрын
I have a 401s amp and has the remote broken I was able too open it and stick it back in , i powered it up and the sound it put out sound like cracking and popping
@Crazylogix0074 жыл бұрын
Did you inspect the pads and solder it back in?
@christopherlewis8763 Жыл бұрын
I got 2 bd1500, 1 power 800, 1 power 1000@2 , and a power 601.2 if you can fix 1 or even both bd1500's you can have the rest!!!!
@Crazylogix00710 ай бұрын
Not taking in amps for repair, sorry.
@kliv-ng6uy3 жыл бұрын
Can you repair my Rockford fostgate bd1001 3000 watt it makes a buzzing noise when powering on and when you turn up the gain it gets distorted
@Crazylogix0073 жыл бұрын
Try this first, with the amp completely disconnected. Spray Deoxit (WD40 works in a pinch) in all the pots and switchs. Move them back and forth to clean, repeat if needed. Dirty pots and switches are a common problem with older amps.
@vincentmartinez42152 жыл бұрын
i was wondering if you would possibly consider repairing my old punch 800a2 if so let me know a price and and an address
@KapetJoseph4 жыл бұрын
I love this! Your videos are extremely informative! Can you do a video explaining how does one go about determining where the PNP and NPN fets go without the help of a datasheet and also how to set the bias. I'd really appreciate that bro! Keep em coming!!👍👌
@Crazylogix0074 жыл бұрын
You bet, I should cover that better. I'll try and remember to point that out as I go forward. I did one video with how to set the bias via the current draw method. I will be doing some upcoming and show the voltage way to set it too.
Hi what size resistor did you use to drain the filter caps ??
@Crazylogix0072 жыл бұрын
Mine is 240 ohm, 5 watt. I recomend a bit higher ohm if possible, mine will get hot in your hand on alot of amps.
@joeinline44434 жыл бұрын
Good repair documentary I need help trouble shooting my Rockford Punch 800a2 when I connected the rca’s before I hooked up the ground wire and it sparked now I have no audio from channels power light comes on do you think the opamps fried don’t know please and thanks.
@Crazylogix0074 жыл бұрын
You can check voltage to the op amps, there should be plus/minus 15 volts on them for power. Check video number 7 on this repair for how to test the little circuit that separates main ground from audio ground. Your amp probably tried to come on and pull ground through the RCA shields. It could have damaged it in the head unit too.
@martinez1701a5 жыл бұрын
I just bought a punch 360.2, 120a2 and a 250a2 that still had end caps, I was going to disassemble them and give the boards a alcohol bath and throw the heat sinks in a parts washer maybe some new paint and reassemble with new compound. Whats the common failure of these late 90's rockford amps?
@alextownsend32645 жыл бұрын
I just purchased a 360.2, 150S, and 45HD. Need work done to the 150s
@martinez1701a5 жыл бұрын
@@alextownsend3264 im actually looking for more I wanna collect them, I had a few of these amps back in the day but I have no idea what happened to them lol I also wanna install a couple of them in my cars.
@Crazylogix0074 жыл бұрын
There are all kinds of possible failures . I have a large pile of Rockford amps and will be doing videos on all of them this winter, stay tuned will will cover lots of things!
@acmilano01015 жыл бұрын
Thanks for the cool video. What kind of old school Soundstream amps do you have to repair? I have 3 myself that I want to refresh.
@Crazylogix0075 жыл бұрын
It is a Soundstream Reference Class A 5.0, it has a blown power supply and one dead channel, so there will be lots to do on it.
@christopherlewis8763 Жыл бұрын
Early 2000's power bd1500.1
@drittal3 жыл бұрын
So if we have something like a US Amps that the fets are along the sides vertically and the thermal paste is easily accessed and is still wet and gets everywhere after you touch it would it be ok to run as is?
@Crazylogix0073 жыл бұрын
It could be dry under the fets. Also US amps were bad about using too much paste.
@Tekatogokuta3 жыл бұрын
hello i have some amps that need repair do you do repairs as a service?
@wilkinru5 жыл бұрын
There's cheap scopes out there these days (yes limited options but good enough for this type of work). Go ahead and use one to show the output.
@Crazylogix0075 жыл бұрын
Yep I do, the problem is my scope is super old, and probably dying. I am saving up for a new (to me) scope, and a lab style power supply too. All things in time. :)
@johncramer994 жыл бұрын
@@Crazylogix007 do you have a donation site so we can help you get a new scope? We help you, you will help us learn
@Crazylogix0074 жыл бұрын
@@johncramer99 No I do not. I already got a newer scope that works great. Thanks for supporting me! Been super busy, more videos coming soon once I get a few more things finished.
@justincarlton773 жыл бұрын
I have a older power 400.4 and when I it plays the sound will go all to the rear right speaker and when I kove the gain knob it will go back to all 4 speakers. Sometimes at least. It has blown a couple of my 6x9's cause of this problem. How do I fix this problem. I love this amp but can't run it now due to its problem. Please help me
@Crazylogix0073 жыл бұрын
Clean all the switches and potentiometers with deoxit, wd40 can be used in a pinch. Spray and work the switches and knobs back and forth with the amp unhooked and turned off.
@ogairbender8084 жыл бұрын
On old ppi amps what's your thoughts on replacing the caps?.they have been sitting in original boxes for over 20 years now .
@Crazylogix0074 жыл бұрын
I thoroughly check all old amps to make sure there are no leaking caps. In some amp lines certain caps are known to leak. I know the Rockford HD and DSM have the small caps that leak. Phoenix Gold has some that leak. With older amps I suggest keeping an eye on them, but won't replace them if they don't show any reason to. You could ask Jason K. in the old school amp repair guidance Facebook group, he is a very knowledgeable tech who does a lot of old PPI amps. Just post your models and ask.
@ogairbender8084 жыл бұрын
@@Crazylogix007 thank you sir
@jonathancaraballo32935 жыл бұрын
Good day I purchased one of this old amplifier . Work fine but a have a pulse sound coming of the speakers event went the r/c off. Any idea what wrong with the amp? Thanks
@Crazylogix0075 жыл бұрын
Very first thing I would do is move all the switches and all the pots (gain, crossover, etc) back and forth a bunch. They get dirty on old amps and start to cause all kinds of sound issues. See part 5 of this repair where I do that and use Deoxit on all them (you could use contact cleaner too, but I think Deoxit is a bit better).
@jonathancaraballo32935 жыл бұрын
@@Crazylogix007 I will watch part 5. I want to learn how to fix amplifier that why I watch your channel and other. Thanks for answering back, have a good day.
@ogairbender8084 жыл бұрын
I just replaced the thermal paste on my old db 1800,s
@Crazylogix0074 жыл бұрын
It's good to have that peace of mind.
@hectorortega91315 жыл бұрын
Hellow Mr. Shiny Head, (also known as Mr. No Bs./Honest Man) hope you are doing good.. Hey my Old School Mono Amp (A JL/1000.1) produces a like a "Pulsing bass note" at the subs, i can see them cones moving in and out non stop when idling, even if my stereo is all the way down. or Rcas disconnected. what could be causing it? any tips a noviest can do to cure the problem?. thanks
@Crazylogix0075 жыл бұрын
I would first work all the switches and pots (not powered) serveral times and then try again. Dirty switches and pots can cause all kinds of funny problems. After that is sounds like there could be a problem in the input section or the class D output driver. If the switches and pots don't fix it, you will have to have it looked at. I have a different amp that seems to be doing something like this, if I get it fixed I will comment again. But due to moving, I am still a good month away from getting back to the workbench.
@1974lakers2 жыл бұрын
the only thing I hate Rockford Fosgate that they overheat JLAudio is much better instead of shutting off its it goes to lower frequency instead off shutting off .
@shadyalmedy5 жыл бұрын
Do you repair amps as a paid service? I have a couple old Fosgates I'd like serviced & inspected
@Crazylogix0075 жыл бұрын
I'm sorry, no. I do this as a hobby. Freeman car stereo, G.S. Amp Repair LLC, and many others, check the old school amp repair guidance page on facebook too, for places that can help you that do this for a living.
@martinez1701a3 жыл бұрын
I have a wierd issue with a rockford fosgate punch 120A2 I was working on, took it apart to clean up noticed it was repaired before anyway I did a quick test with just the board and my desktop power supply seemed fine until I put the board back in the case. Seems that the power supply is shorting out through the heatsink, I can make it work by insulating the heatsink on the power supply side from the case. Can you point me in the right direction to see what might be causing this? I did replace all the mosfets on the power supply side cuz it looked like a crappy repair maybe I have a bad one I dont know.
@Crazylogix0073 жыл бұрын
Test the Fets with your multi-meter. If you bought the Fets from Ebay or Amazon, they could be fakes.
@martinez1701a3 жыл бұрын
@@Crazylogix007 god damm I did buy them on ebay, the fets are shorted on the center leg and heat sink. The previous owner had the same problem with fake mosfets, other than that it works.
@Crazylogix0073 жыл бұрын
@@martinez1701a did you put the insulator on the back of the fet between it and the heat sink. Fets with metal backs are electricly connected to the center leg.
@martinez1701a3 жыл бұрын
@@Crazylogix007 the fets on the punch 120a2 are soldered on the heatsink
@Crazylogix0073 жыл бұрын
@@martinez1701a should be soldered to a mehsa strip, which is bolted to the heat sink. It is the insulator, unless its damaged.
@ghegee4 жыл бұрын
I have a Rockford Fosgate Punch X250.2 that powers up but no sound. I tested the amp and found a channel that had blown mosfets. I replaced them but still no sound...any ideas why?
@Crazylogix0074 жыл бұрын
Normally when the outputs fail the drive transistors die too. They should be A06 and A56 transistors driving the output fets. You will also need to check the protection circuit. I plan on doing a video on it.
@ghegee4 жыл бұрын
@@Crazylogix007 I appreciate your feedback, thank you! Can't wait to see the video!!
@Bang_n_slang5 жыл бұрын
What is the link on those remote turn on switches or how can I purchase one ? Mine broke off 😢
@Crazylogix0075 жыл бұрын
If you mean the remote turn on terminal, the part can be found at Digikey (and others), their part number is A112006-ND. That is the short length one that fits most amps, I have yet to find the long one instock.
@lemuellarmour24063 жыл бұрын
Do you do repair amp from out of town repair??
@Crazylogix0073 жыл бұрын
Sorry not at this time, I have a full time job, wife and kids. I am overloaded with just repairs I find on my own, from family, friends etc.
@jameslakes50193 ай бұрын
😮
@kevinmoney48472 ай бұрын
It looks like this amp
@Luislusmartinez2143 жыл бұрын
How much you charge to repair an amplifier
@Crazylogix0073 жыл бұрын
I am only doing local stuff right now, and I am swamped! One day in the future maybe, keep watching, if I do I will announce it here on the channel.
@homie-gtv3223 жыл бұрын
I'm sorry. I didn't get the volt part. Can you repeat the entire video again?
@ogairbender8084 жыл бұрын
Could you repair or replace the caps on these old girls ? If so please send me your information and we can get together soon and send them to ya
@Crazylogix0074 жыл бұрын
I only replace caps if they are bad, known to go bad, or if someone is willing to pay all the extra. I hope to get caught up and taking in some more amps soon, but it will be a bit.
@djgblaze1of15 жыл бұрын
I need a badge for this amp
@Crazylogix0075 жыл бұрын
Not sure who would have any replacements, If you find out, come back and post it, I know there are bound to be lots of people who would love to know.
@djgblaze1of15 жыл бұрын
Crazylogix007 found one of offer for the punch and purchased it but mines a power
@Crazylogix0075 жыл бұрын
@@djgblaze1of1 things like that if you can snag them cheap are great, then if you find a old amp missing it, buy it cheap cause it looks rough. Then you add your badge and you have a much nicer amp in your install or collection.