Precision Power PPI 2150 Class AB Automotive Car Amplifier Repair

[@PioneerGuy581]

I Like your styrafoam bench idea , i am a tech also.

[@rfr653]

good job mate.

[@ellensburgamplifier]

Thank you for watching and I appreciate the channel support!

[@tyronearendse1722]

Thanks Todd for this video it help a great deal to see the different problems that can occur

[@ellensburgamplifier]

Thank you. In my opinion, it is best to figure out what has failed and why instead of just replacing the defective parts and calling it good. There are many, many different styles of amplifier boards. A solid, firm understanding of diodes and transistors will go a long way to helping board repairs.

[@tyronearendse1722]

@@ellensburgamplifier I agree on that, normally I after checking the power supply mosfets and output transistors I would check all other components like the diodes and smaller transistors cause they are easy to check

[@littlejln213]

I have one of each of these series. Including 3 650s and a pair of the 450s.

[@ellensburgamplifier]

Some interesting amplifiers you have!

[@ericlloyd7981]

Thought it was for the PPI PC 2150, perhaps show the heat sink and state what year it is from if you know anything else about what your working on.

[@PioneerGuy581]

I will be selling a "SUPER RARE" PPI ART SERIES WIND BREAKER JACKET it was worn at the 1995 IASCA Nationals, i used it to tune my install on Greg Cassis Typoon, taking offers it is a XL Windbreaker near mint condion.

[@jimcatanzaro7808]

Hi Todd I have about 5 art series amplifiers that need to be repaired I can’t find any schematics online for these besides testing

[@ellensburgamplifier]

Hi Jim. I do not believe you will find any schematics. If you need to dig into the circuit design the I would suggest reverse engineering one section at a time. Get one running and then use that one as the reference.

[@jimcatanzaro7808]

@@ellensburgamplifier thanks

[@jimcatanzaro7808]

Hi Todd are you taking in any work? I have 5 amps that need repair ppi amps from the 90s

[@matw9743]

Hello, My amp makes my subwoofers crackle with a wave sound and when I bang on the amp in certain places it stops. Sometime it also just stops out putting to the subs and nothing plays. Im not to experienced in amps, but would you know what could be the problem?

[@ellensburgamplifier]

Hi Mat, it sounds like a bad solder joint or something is loose. I would be careful as that can cause large surges in current and then you will end up with shorted transistors.

[@matw9743]

I opened it up and found a film capacitor with a green top that was loose if I try to solder it back to where it was should it have a better connection? Also would it hurt anything?

[@ellensburgamplifier]

@@matw9743 It shouldn't cause any problems soldering it back in place. It is a common issue to have bad solder joints in older boards.

[@matw9743]

@@ellensburgamplifier Ok, Thank you for the help and the very fast reply you are amazing.

[@tyronearendse1722]

Please advise, on the output must the speaker output/polarity be in phase when you are done with a repair or do it depend on the design?

[@ellensburgamplifier]

It does depend on the amplifier but for the most part, they are in phase if I am reading the question right. The biggest aspect I look for is having the same amplitude and no noise.

[@tyronearendse1722]

@@ellensburgamplifier thank you for this info

[@dizzydezel9899]

Hey I have a Rockford T600.2 and Rockford 1200.1 prime in need of repair can you help me out with contact info for repairs?

[@ellensburgamplifier]

You can find me at www.ellensburgamplifier.com but I do tend to stay away from RF boards when I am busy due to the complexity of their circuits. They tend to be a little more difficult to repair. The Prime amplifiers are not as bad so please feel free to get ahold of me through the request form in the drop-down menu on the site.

[@celebritystreetmuscl]

Hello... r u still repairing amps? I have a earthquake pa 2300 that needs work.. I'm in California

[@ellensburgamplifier]

Thank you for watching! www.ellensburgamplifier.com/request-a-quote is where you will find me.

[@lewiskhan9825]

hi can you use wd40 to clean a amp board? I tried alcohol, crc contact cleaner but both is leaving a brownish residue. keep up your videos learning alot from you! where do you buy your replacement components?

[@ellensburgamplifier]

Hi Lewis. I have never tried WD40 and not sure if that would leave a conductive residue behind. I have never had any issues with denatured or iso alcohol so I have not had to try other products. I get my parts from Mouser, LCSC, and UTSource (UTSource is hit or miss on obsolete parts so be aware and do your due diligence on testing received parts!). There are two people on eBay that I get obsolete original parts from whom have not failed me yet. I do have a contact I use for my large middle and end-of-year inventory orders.

[@jimcatanzaro7808]

@@ellensburgamplifier mineral spirits is a great cleaning and lube for pots wd -40 will attract dust after time and make it stick I personally clean with alcohol or mineral spirits And let dry and I have have a kit of detox it cleaner and all the other stuff it comes with it’s a good kit for the money it fixed for now a few dead spots on a expensive pot that they no longer make

[@ellensburgamplifier]

@@jimcatanzaro7808 WD40 in my opinion is good for bolts on cars and not on any electrical components. I made a mistake years ago on a cardmatic tube tester when I used an oil-based spray on the card reader pins.

[@jimcatanzaro7808]

@@ellensburgamplifier I agree but if you have something that is mechanically locked up like a old selector switch that I always have to fix usually in a repair job i use a couple small drops of 3and 1 oil and I use my heat gun and work it gently and adding tiny drops of oil when it’s hot so it gets in there Hey everybody has little secrets I love em My old pots on this 1930s radio I would paint graphite on the dead spots on the pots and get it working great again they have paint available but it’s very toxic so you should use a fan or do it outside that’s the only down side

[@kepharolang1984]

@@ellensburgamplifier kindly share your ebay seller for parts. Thanks

[@lloydramberan5567]

AMP NOT PLAYING CLEN

[@ellensburgamplifier]

Sounds like you need a few new transistors or the pre-amp looked at.

[@strictlyamps820]

Hey Todd, another great video. I have a question, where do you ground your scope? Your signals are crisp and clean.

[@ellensburgamplifier]

Great question Cliff. For most of the testing, the scope is grounded at the negative battery terminal. There are a few situations where this is not the case. If I am probing the pre-amp area, depending on how the secondary is tied to the pre-amp then I have to ground at the RCA signal ground. Also, the signal quality depends on the noise of the PS. I have one of the cheap 30v 10A adjustable supplies that the thing is absolutely noisy. Watch for earth ground loops!

[@strictlyamps820]

@@ellensburgamplifier lol, I have one of those cheap things also. It is now a secondary PS, because my signals had so much noise in them. I now use the Astron 50, doesn't have digital readout, just analog, so I have to get my old man glasses out to see it. lol

[@ellensburgamplifier]

@@strictlyamps820 Excellent power supply! I think it is the same as the Pyramid PS-50 that I have. Good clean power. Let me know if you ever need one of the voltage regulator IC's for that supply if it is the same. They are a bear to find!

[@strictlyamps820]

@@ellensburgamplifier Will do, I have the Pyramid PS-52KX also. Got to do some work on it though. It pulls my voltage way down when current just rises no more than say 7amps. I replaced all the pass through transistors. I bought it used, so I really don't know what they did to it, I replaced the caps also. 10000uf i think they are.

[@ellensburgamplifier]

@@strictlyamps820 Have to love previously worked on equipment. If you ever get around to fixing that up I would look into the SCR circuit if it is using one.