Pioneer GM-D9601 Class D Car Automotive Amplifier Repair With Cooked Remote Bass Knob Circuit

[@ripleysmith7583]

Great work! I too would replace Old transistors. People don’t understand it’s like having four old tires and one goes out. Changing it’ll get you down the road but it ain’t gonna last long. Excited for the next one.

[@ellensburgamplifier]

I see it all too often. One transistor replaced in a parallel bank may work in specific low current applications but not so much in high current applications.

[@peacekeeper4528]

I just bought the same amp of off FB market. The seller said it worked and I had no way to test it at the time. Well it didn't work and the positive terminal sparked when nothing was on. It fried the positive wire. So I got some 6AWGC wire. Wire didn't get hot but all 3 fuses blew. Power mosfets all checked ok. The end pree amp tested bad. But I'm thinking the diode is bad. Because in circuit at times it would show a short and sometimes it doesn't. The spark on the positive terminal without even powering on. Just leads me to believe the diode is allowing current to flow backwards causing the spark. Circuit board is clean. No discoloration or burn marks.

[@HavingFunRepairs]

Nice to see you take the extra steps to ensure a quality repair.

[@ellensburgamplifier]

Thank you! I take a lot of pride in my work and customer satisfaction is a top priority.

[@oleksandrbykov5480]

A lot of explanations! Thanks for sharing all that knowledge!

[@ellensburgamplifier]

Thank you, I tried to provide as much information as I could without overdoing it and making it complicated. I try to keep in mind that a lot of viewers may not know too much about class D circuits.

[@cartycartyamplifiersalesrepair]

Amazing video very educational

[@ellensburgamplifier]

Thank you for watching!

[@MusGym-official]

I got the same amp and my two sub speaker wires touched I had the same mossfet go in the same place 4227 and one of my 3205 went. watching this video big help cheers

[@ellensburgamplifier]

Remember to replace all transistors that are in parallel. Glad to hear this video is still helping others!

[@tatialo37]

Cool!! I need a ppi repair!!! It's a ppi 250.from 1999!

[@ellensburgamplifier]

some PPI amps are a pain o fix and others are not so bad. www.ellensburgamplifier.com/request-a-quote

[@bradpitt3965]

Great job, a transistor malfunction on one of the rails and those measurements that revealed a problem with the amplifier. I know more thanks to you. Thank you and best regards, waiting for more films

[@ellensburgamplifier]

Glad the information was able to help! More videos are in the works.

[@bradpitt3965]

@@ellensburgamplifier the information you provide in your videos is very clear and clear compared to other makers of other material related to car audio, amplifier repair

[@ellensburgamplifier]

@@bradpitt3965 Thank you for your support. Stay tuned for more to come.

[@bigstone5124]

Thanks for sharing 👍

[@ellensburgamplifier]

More is on the way!

[@bigstone5124]

@@ellensburgamplifier it's a pleasure to see that much care and professional service 🙏👌

[@IAM_HC]

I have this amp, my transistors on the power supply are all popped. Theoretically, if I replace with the same part I should be good, or are the other things in line that may have blown first?

[@ellensburgamplifier]

Thank you for the channel support. There are a few reasons for the power supply to fail and one that is most common is a shorted output. This overloads the power supply causing the transistors to fail. Another is reverse polarity, just as damaging but less common. Under-voltage and heat would be the next runner up. I would check for low resistance values on the output transistors (gate to source) and let me know what you find.

[@marke293]

Great video with clear explanation may I ask what the typical cost is for this repair ?

[@ellensburgamplifier]

I haven't had one in for a while but the average was just over $100

[@bobmartin6816]

I have the exact same model ...problem in the same area.....was wondering where can I find the Fets for this amp....Nice video also.....lots of good info....

[@ellensburgamplifier]

The output transistors for this might be a little hard to find authentic. I can't remember if this uses the IRFB4127 or the IRFB4227. Mouser, Digikey, Arrow, and Newark are my first go-to places.

[@markcunningham2959]

I have 7 of these running 6 to 6 skar evl’s great amp

[@ellensburgamplifier]

I have never seen 7 of these in an installation. Good job on setting them up properly!

[@peterstewart4559]

Keep up the good work man keep those videos coming 👍🏾

[@ellensburgamplifier]

Thank you Peter! I have several in the making.

[@celebritystreetmuscl]

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

[@ellensburgamplifier]

Yes I do! I think I may have seen you submit a request at www.ellensburgamplifier.com

[@Mrlukasmy2k]

Great video. I have the same amp and need to replace the gain potentiometer. I am struggling to find out what one I need to replace it, do you happen to know what I need? Would be a great help

[@ellensburgamplifier]

It is a double gang 20k potentiometer. I do have them on hand if you can't find any. www.ellensburgamplifier.com/contact-us

[@xnorsx]

Thanks!

[@ellensburgamplifier]

Thank you so much for the channel support!

[@johnnieniunimae3606]

I have the same Amp with Red Light and a beep sound on when turned on. Is that the same problem or something else?

[@ellensburgamplifier]

It could be a lot of common things. Does the blue light try to come on at all before the red light? Could be a bad power supply or output section. Now the "beep" is not normal but could be a high frequency going through the output inductor before shutting down.

[@markcunningham2959]

Please help I bought a new 2013 9601 how do I send it to you for repair speaker terminals touched now only red light and speaker pulses slowly thank you

[@ellensburgamplifier]

It is an easy process! www.ellensburgamplifier/request-a-quote.com and fill out my form then I will get right back to you.

[@sensyducky8892]

Hi, I bought the same amp but I am having issues with the bass boost remote. When you plug in the remote it automatically boosts the bass. Without turning the nob,but when I turn the knob the output does not change. What might be the issue??

[@ellensburgamplifier]

It is a problem on the board or an incorrect control knob. (they are not all wired the same)

[@coregts3504]

Hi great video, My gm- D9601 mono is fully working with sound and full voltage output, however on startup the red light comes on then goes out thats normal, then the blue flickers a bit then goes out all together, so ive a fully working amp with no constant blue light it flickers on now and again when in use, very strange any ideas? Much appiciated thanks.

[@ellensburgamplifier]

If it is not a loose solder joint, then it could be a failing LED but they tend to fail in a different way. I would suspect a bad solder joint or leaking transistor that is driving it.

[@coregts3504]

Should i attempt to fix or just leave it? as the amp is fully working and thinking if it went into protection the red light would come on if any problems, would you say its a soldered joint close to the led? Or would it be one of the amplifying transistors that fix to the metal body? Thanks for replying very greatfull 😃

[@ellensburgamplifier]

@@coregts3504 You can leave it if you choose to do so. Eventually it will not come on at all. It may be at the LED solder pads or it can be any one of the SMD components for that circuit. The transistors along the sides are just for power which the LED is not connected to.

[@tadlandin2733]

I've got this exact same amp. Mine will work on startup, then stop pushing sound to the subwoofer after about 5 minutes or so. The power on the amp stays on, no protect mode, constant blue power light even when the bass/sound drops out. I've checked signal wire, which is constant when the truck/stereo is turned on. Power wire and ground wire is also good. I figured if those were bad, the amp would go into Protect Mode. I tested my subwoofer with another amplifier and it's still working great. Could you point me in a direction of where to start on the amp board itself? It seems to me that something is failing within a component that plays a role in the sound output.

[@ellensburgamplifier]

Do you have a scope? This issue will be best found using a scope to see where the signal is dropping out. Can be as simple as an SMD cap that is heating up.

[@lewiskhan9825]

grate video as always

[@ellensburgamplifier]

Thank you Lewis for watching!

[@joshholden8561]

I love this amp i got great power out of it.

[@ellensburgamplifier]

They are great boards when the components are fully secured down. If you have never had it serviced by a tech then I would pull the cover and secure the capacitors and inductor down as this is one of the leading failures of them.

[@livebig6414]

⁠@@ellensburgamplifierwhat glue would you recommend? Also Im running same amp but 4 channel variant, I got speakers at 1.5 ohm and subwoofer on bridged channel at 2ohms, the amp gets a bit toasty, Im thinking of adding 2 80mm pc fans below and maybe small heat sinks on transistors, any advice regards heat? Thanks in advance.

[@ellensburgamplifier]

@@livebig6414 I will safely assume that the 1.5 ohms load across a bridged channel is too low for that amp. If I remember right about the 4 channel amps, each channel is rated 1-ohm minimum stereo (model dependent) making it 2-ohm minimum bridged. This will be the heat issue. As for the glue, I always recommend Gorilia Glue Clear Grip or E6000 depending on the application. The E6000 is much thinner but can get down into windings better.

[@livebig6414]

@@ellensburgamplifier Sorry, I probably did not explain correctly, I run speakers on 2 channels in parallel each speaker is 3ohm in parallel is 1.5. The only bridged channel is subwoofer which is 2ohms.

[@choiwaiman7465]

I got the problem on sound output of my D9604. When I turned it on, I saw the constant blue power light but no sound came out from speakers. I used another power amp for testing, all components were working fine without problem. What do you think the possible reason of this issue? thanks for your comments.

[@ellensburgamplifier]

Blue light with no sound is either bad output transistors, bad drive IC, bad pre-amp. You need a scope to see if you have any switching at the output transistors if there are no shorts or low ohm values.

[@xnorsx]

Hi, thanks for good explanation. I have the same amp, after 3 years of using it, I changed the subwoofer and by accident short the speaker wires, and I think the same transistor for mine has been broken. The question is, there ar 6 of them, the top nr is for all of them IRFB4227, but three of them has second P538P and three P542P. I search on ebay from top part nr, but many of them the second part nr are different, it's safe to use them?

[@ellensburgamplifier]

The bottom numbers are the date code. I would make sure for good practice that the parallel set of three is the same. Or if you can get all six the same that would be easier. However, I do warn against buying transistors from eBay sellers unless you know exactly how to spot fake or counterfeit transistors.

[@xnorsx]

@@ellensburgamplifier Big thanks for the answer. Maybe you can share the website where would be better place to buy these type of parts.

[@ellensburgamplifier]

@@xnorsx Are you in the states?

[@xnorsx]

@@ellensburgamplifier I'm in europe

[@ellensburgamplifier]

@@xnorsx lcsc.com/search?q=irfb4227 They have them in stock

[@Mr1991STE]

Great video!. I get a tapping noise in my Subwoofers, even when rca cables are disconnected.? Would you have any idea what this could be. It doesn't go into protect mode 😢. So confused.

[@ellensburgamplifier]

These are notorious for having issues in the output section. I would assume an issue with the output drive or output filtering components.

[@Mr1991STE]

@@ellensburgamplifier hi. I have replaced the irs2092s component but I still have the sound. Bass also sounds weak

[@Mr1991STE]

@@ellensburgamplifier my outputs are reading 25 ohms... What should the output ohms be?. Regards.

[@ellensburgamplifier]

@@Mr1991STE I don't know what the resistance should be but I do know that 25 ohms is not correct which tells me you have an issue in the output section.

[@Mr1991STE]

@@ellensburgamplifier would you happen to have, or know where I could buy a schematics for the d9601 amp.?

[@deearm-gk9lb]

Hello I’m in need of getting an hifonics 1700 super class d amp repaired.

[@ellensburgamplifier]

www.ellensburgamplifier.com/request-a-quote if you are interested in sending it in for repair and please check out the FAQs for answers to the most common questions I get. www.ellensburgamplifier.comFAQS

[@dianarafernandez724]

There is something in my GM-D8604, i just wondering how could this happened the ground and positive terminal are almost short circuit? reading is just 0.4ohm.. what is the normal reading if it is unpluged from battery?

[@ellensburgamplifier]

When unplugged you would see the power supply capacitors charge. With a .4 ohm reading I would suspect a shorted power supply or a shorted reverse polarity protection diode.

[@marvinrivera332]

Hello, how to check if pre amp is working? I have one amp turn on blue light but no sound

[@ellensburgamplifier]

Do you have a scope to check for signals?

[@marvinrivera332]

@@ellensburgamplifier i have one chinesse economic

[@xnorsx]

Hi, I changed all 6 transistors 4227, the amp is working, blue light comes on, but when turn volume up about half the amp goes into protecting mode and restart to normal and so on. Maybe you know where the next problem would be where to look.

[@ellensburgamplifier]

A current-based issue. Depending on the severity of the output short, you may also want to check the TO-92 drivers and possibly even the drive IC. If it is none of these items then I would have to question the authenticity of the 4227's. They should not heat up at all at idle with no load connected.

[@xnorsx]

@@ellensburgamplifier Hi, what can I say the miser pays twice, I bought the cheapest ones thinking to save money, but they didn't work, like I mentioned. Then I use your link and wala all works, thank you very much 🙂

[@ellensburgamplifier]

@@xnorsx You are welcome! Fake or counterfeit parts are everywhere. Luckily in most cases, they don't work or pop instantly.

[@vincentrusso4332]

@@ellensburgamplifier dang really... the counterfeit parts are out there like in electronics.. I've just purchased a slew of old school amps that all need repair as a hobby, as my spine says no more physical fun stuff. However I wish I could find an animation that shows how current runs through the board. In closing did you use Perry Babins guide or go to school for this as I'm thinking i possibly made a bad move. Basic tools to have and brand name you recommend and also what is a decent low cost oscilloscope with friendly user interface with only essential features. I've been watching Sam from Barevids for a few years. Thanks sir. / nevermind, I found most of the info in the description, however can i get by with a less expensive Oscope until I'm sure this is the hobby for me?

[@ellensburgamplifier]

@@vincentrusso4332 The most important thing to remember when shopping for a scope is for what application are you using it for? Some of these amps can get into the several hundreds of volts so you must make sure that the scope can support the voltages being tested.

[@martinnideng4135]

The three transistors you replaced are all of the gonna have the same ohm when you are finish?

[@ellensburgamplifier]

For the most part yes you will see the same resistance.

[@CarlosRivera-uj7vd]

Are you able to repair a sundown amplifier

[@ellensburgamplifier]

It all depends on which one as they have released several different designs.

[@bradpitt3965]

Hi, I managed to get this amplifier for little money, what do you think it is better in terms of components than the newer versions of Pioneer? Pioneer Gm-d8500m :) Thank you

[@ellensburgamplifier]

I am not too familiar with the 8500m's but I do suspect a similar build.

[@bradpitt3965]

@@ellensburgamplifier now I'm talking about an interesting topic, because you could compare the current Pioneer amplifiers with the model I gave you. How they differ in terms of the parts used and the quality of workmanship :) Many thanks

[@bradpitt3965]

@@ellensburgamplifier I realize that amplifier manufacturers watch these videos and: are amenable to the current suggestions, so they may have to fit more powerful components than usual.:)

[@ellensburgamplifier]

@@bradpitt3965 It is interesting when I hear from manufacturers for my "input" on failure points, common issues, and price points.

[@bradpitt3965]

@@ellensburgamplifier therefore they have to work harder and use stronger components than is customary ::)

[@jesse2874]

Where do you purchase a new inductor coil

[@ellensburgamplifier]

Inductors usually have to come from donor boards.

[@jesse2874]

@@ellensburgamplifier thank you

[@bradpitt3965]

Hello, I have a small problem with the selection of a transistor whether to replace three when it comes to Pioneer the same, whether they should be different IRFB4227PBF MOSFET TRANSISTOR N-CH 200V 65A TO-220AB old transistor is number IRFB4227 IOR P619P 57S1 do the symbols of the transistor S1 S2 S3 and so on have any meaning? I cut off the one from one bank and that was the main problem, now the amp glows blue :) Yeah :) You are amazing :) :) Many Thanks

[@ellensburgamplifier]

A good practice is to replace the transistors that are in parallel. I can't remember, does this amplifier use the 4227's?

[@bradpitt3965]

@@ellensburgamplifier exactly IRFB4227 IOR P619P 57S1 Pioneer -GM9601

[@bradpitt3965]

as in the video, I cut off the first transistor and a blue light appeared :)

[@ellensburgamplifier]

@@bradpitt3965 Yes replace all the parallel transistors with the same batch.

[@bradpitt3965]

@@ellensburgamplifier MOSFET Transistor IR TO-220 IRFB4227 IRFB4227PBF great if there is any difference between them?

[@warenmann1042]

Good video, very informative. On another note, Your autofocus keeps trying to refocus, especially when your hands are over or near the board, which is exactly what autofocus is suppose to do, but it makes the video a little hard to watch. I would turn it off. Most of the videos I have watched very seldom need it and, if turned on, it usually relegates a good video to an ok or lower ranking video. If you need a closeup, move or refocus your camera then. Not complaining just observing. Thank You for providing the video and the information...

[@ellensburgamplifier]

Thank you for the feedback! I will implement that moving forward.

[@MIMImprovisationsVideos]

Hi, I am hoping that you can assist me in diagnosing my 5 channel Pioneer Amp. GM-D9605. The Amp. was playing fine and all of a sudden, the front speakers started acting up. When the car is turned on, there are strong statics coming out of the front speakers without having to turn the radio on. When I turn the radio on, the subwoofer and rear speakers work fine. However, the static continues in the front speakers. The left front does have sound and static but the right front does not have sound, only static. When I switch the front speaker wires, the driver side goes quiet while the front right starts playing which suggests the speakers are not the problem. I probed the transistors/mofset, not sure the difference. I found 1602CT and 1602CTR top, and 1602CT and 1602CTR bottom or (opposite sides) reading positive to a continuity test. I thought that was the problem so I replaced them. Only to find the new ones behaving the same way. When I tested both the new ones and original ones out of the board, all tested negative for continuity. So, they only test positive when attached to the board. I soldered back the original mofsets since they seem to be fine. When I disconnect the front speaker wires, the Amp. Plays as if nothing is wrong with it, except that there is no sound from the front speakers obviously. I am therefore stuck. I am not an amp. Tech. Just trying to repair it as I do on many of my electronics. Hope this gives you some idea of what might be going on with the amp. This is the best Amp. I have ever had, sound-wise. Any suggestion as far as what else to look for? Thank you.

[@ellensburgamplifier]

I have not had a 9605 in before but I am suspecting there to be two IC's that will be driving the 4 channels. One channel will be defective at the IC. The 4 inductors is a sign of this type of setup. The IC's could be underneath as I don't have any pictures of the board to know where to direct you to look. The CT and CTR TO220's are rectifiers. You will show a short because they are connected to the secondary windings of the transformer. The reading you are seeing are correct.

[@MIMImprovisationsVideos]

@@ellensburgamplifier Thank you. I want to send you a picture but I don't see any option to attach a pic. I really appreciate your prompt response. Stay blessed

[@ellensburgamplifier]

@@MIMImprovisationsVideos You can send a picture through my website at www.ellensburgamplifier.com which is where you will find all my contact information or the link at the top to request a quote that will put you right into the mailbox.

[@MIMImprovisationsVideos]

@@ellensburgamplifier Thank you

[@tarunkumar1854]

I have a Pioneer GMD 9601 amplifier shorting on postive and negative terminal. Please help sir

[@ellensburgamplifier]

You have shorted power supply transistors. You may need to replace the transistors, pre-drive transistors, and gate resistors up to the drive IC. Now in most cases, a shorted output causes an overload in the power supply so I would also check the output transistors and drivers.

[@tarunkumar1854]

Sir my problem is not solved help me sir

[@ellensburgamplifier]

@@tarunkumar1854 There are only a few reasons why there would be a short across the power terminals. That would be shorted power supply transistors and in rare cases shorted filter capacitors. If the drivers are across 12v and ground, they could also be shorted. The first thing is to isolate the short.

[@tarunkumar1854]

Sir IFR 3205 and output transistor is ok , but all filter capacitors are shorted.

[@gopyyanusdev3486]

Is this a mosfet amplifier

[@ellensburgamplifier]

This is a class D amplifier that uses transistors in both the power supply and the output amplification section. Thank you for watching!

[@tarunkumar1854]

Sir IFR 3205 transistor shorting on drain and source terminal remove from circuit but ifr 3205 transistor is ok , but shorting on location.

[@ellensburgamplifier]

Pull all the 3205's and check the pads to make sure you don't have a shorted transformer.

[@tarunkumar1854]

All Ifr 3205 transistor drain and source pad shorting.

[@tarunkumar1854]

You have pioneer gmd 9601 amplifier circuit diagram , pcd layout. Sir please share

[@tarunkumar1854]

Please help me

[@ellensburgamplifier]

@@tarunkumar1854 I don't have schematics for these. Shorted RC snubber? Luckily it is the power supply side so not much is connected to the ground. I assume you are seeing the same short at the power terminals?

[@mikelucas6769]

What about the voltage is flowing equally and there is no sound

[@ellensburgamplifier]

Do you have low-side drive? No sound is no modulation.

[@bradpitt3965]

I would just like to ask about one thing in your movies, when it comes to this model you have resistance 4.7 everywhere I have 4.6 is it normal? Many thanks

[@ellensburgamplifier]

Yes, you will have a tolerance value with almost any electronic component. The key is looking to see if any are substantially off.

[@bradpitt3965]

@@ellensburgamplifier Thank you for the very valuable information that will be very useful to me And now I'm getting down to work. Thank you and Best regards:)

[@ellensburgamplifier]

@@bradpitt3965 I am always here for questions!

[@bradpitt3965]

@@ellensburgamplifier you are one of the few people on social media who responds so quickly ::)

[@ellensburgamplifier]

@@bradpitt3965 I try to stay on top of it. Please remember to watch out for the high rail voltages!

[@amarmishra7693]

My automatic signal power on is not working, how do i fix this, i really wanna know about it.😔

[@ellensburgamplifier]

Is the remote not turning it on? I don't have a 9601 in but I do have a 8601 that may be the same. You will have to follow the remote circuit to the first transistor. You may have a failed remote circuit depending on what the original fault was.

[@amarmishra7693]

@@ellensburgamplifierpioneer 9601 hav ability to turn on with 12v and ground connection with rca cables running through music system of car only, this amo doesn't need to connect remote wire connect with 12v. But the issue is my automatic turn on sensing with RCA cables is not working, i need that solution. Please ??

[@ellensburgamplifier]

@@amarmishra7693 Sorry, you are talking about the signal sensing circuit. I do not have information on that circuit on hand. I can try to look into it with the Gm8601 that I have in.

[@amarmishra7693]

@@ellensburgamplifier if u find then will u make a short video to explain ??

[@ellensburgamplifier]

@@amarmishra7693 I will see what I can do. I took a brief look at the one I have so I should have an answer soon.

[@PrestonJWard]

Does every transistor supposed to be the same

[@ellensburgamplifier]

The rule of thumb is every transistor in a parallel configuration should be the same. For instance 4 "push" and 4 "pull" transistors for a transformer would be 4 transistors in parallel for each push, and pull group.

[@PrestonJWard]

@@ellensburgamplifier Thanks, I'm really interested in learning how to do basic repairs on amplifiers and your videos are very informative

[@ellensburgamplifier]

@@PrestonJWard Thank you! Please feel free to contact me with any questions and I will do my best to help out. www.ellensburgamplifier.com/contact-us

[@PrestonJWard]

@@ellensburgamplifier I appreciate that a lot. I'm excited that I figured out what was wrong with an amplifier given to me it was stuck in protect now I know why transistors.

[@feelit1768]

same amp, power and neg got shorted. Please help me

[@ellensburgamplifier]

If you are wanting to send it in then www.ellensburgamplifier.com/get-a-quote is the best way to get ahold of me for this. If you are wanting to fix it yourself then the first question is do you have a scope?

[@feelit1768]

I would love to be able to fix it myself but I’m sure its way above my skillet 😔 I don’t have access to a scope but I would be more than willing to learn how. Very curious what a typical repair job would cost me

[@ellensburgamplifier]

@@feelit1768 They typical cost for boards of that size is around $55 to $75 at the time of posting. 2-22

[@basshead30]

👍👀👍

[@ellensburgamplifier]

Thank you for your support!

[@mebanringsapsyiem1422]

Mine have no sound but ic all ok

[@ellensburgamplifier]

(If you have a scope) Do the output transistors have the high side and low side switching on the gates? If so is there any modulation as you increase gain or change frequency?

[@allanjackson614]

Can I send u an amp to repair

[@ellensburgamplifier]

Sure can. The first step is to submit the service request form at www.ellensburgamplifier.com/request-a-quote and I would also check to see if it is on the list of amps I may not service at www.ellensburgamplifier.com/FAQS

[@Random_4400]

Who else is here from my mate vince?

[@ellensburgamplifier]

Vince is a genuinely great person!

[@luzmerypariroque4102]

No entiendo ni Michi