Apr 29

Vypyr Schematics Collection

Vypyr DSP Board

Vypyr DSP Board

This page contains links to my collection of Vypyr schematics, photographs, and illustrations.  Please leave a comment if you find these useful.


If you have any pictures if the inside chassis of any of the Vypyr amps that I don’t have here please send a copy to Vypyr Schematics. Also, any missing schematics would be greatly appreciated. I’m looking for the Sanpera I schematic in particular, but a lot of the tube Vypyr schematics are missing from this collection as well. Recently added the schematics for the VIP 2 amplifier. There are some interesting similarities and some surprising differences between the classic Vypyr and the VIP designs. It is pretty obvious that Peavey applies some good process improvement in their design group.

Thanks go to WashburnTabu on the Peavy Vypyr Forum for collecting most of these.

Generic Vypyr Boards
Vypyr 30 Specific Power Supply -Amplifier Schematic
Vypyr 60 Specific
Vypyr 75 Specific
Vypyr 120 Specific
Sanpera Controllers

Vypyr VIP Schematics

Generic Vypyr VIP Boards
Vypyr VIP 2 Specific
Vypyr 100 Pro Specific


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  1. Erik


    I’ve got a Peavey Vyper VIP 3. Bought it in used but like new condition from guitar center. I noticed that it has popping sounds when the pre and/or post gain is turned up to anything higher than 0. It gets far more noticeable when gain is turned higher. I had the amp head out of the cabinet and check connections and sprayed electrical connector cleaner on everything and the issue persists.

    I’ve changed wall outlets, cables, and guitars.

  2. Benny Joy

    Have Vypyr 2 Vip 2 and if you turn the unit on all the lights flashing in sequence over and over again . Unplug input board and lights work like suppose to. So i replaced input jack assy. Still same problem can you give me some suggestion on cause.

    Home Arama

  3. Craig D.

    I have a Peavey VIP3 100 W amp. While playing at a nominal volume, it will intermittently go to full volume without warning. The issue has progressively gotten worse. A local tech guy mentioned an output transformer? Is that repairable? I would just like to have a fully functioning amp again.

  4. Steve B

    Thanks for all the useful info you have here.

    I replaced the small midi board that is attached to the midi footswitch jack and it works now.

    Please disregard my earlier post about my VIP2 not getting signal from my Sanpera II, unless you want to post it for other DIY guys benefit.

  5. Steve B

    I have a sanpera II and VIP2. My Sanpera will not send input selection to the amp. When I change settings on the amp itself by selecting through the 4 led on each of ABCD the sanpera receives and corresponding 1-4 red led and display window indicates correctly. Had it apart and made sure the ribbon cable from midi to dsp was seated well. MIDI board jack is perhaps bad ? Do you know of a source for the midi board ?

    I have another VIP2 & Sanpera 2. Both Sanperas and cables work fine with that amp.

  6. jessica p stevens

    Hi. I have a problem
    I Have a Vypyr 60 Specific. It doesn’t work properly. What can I do now ?

    1. Dani

      You might have to look into flashing firmware. I had to disassemble a couple amps to flash the actual chip on the board to get the amps working again. There’s a YouTube channel utilizing an Arduino, and Aldo dime forums where I learned how to use a Raspberry Pi instead.

  7. Nick

    Hey glen
    I have a vypyr 60 for long time now. I have had the DSP board replaced few years back while it was under warranty. I have let it sit in a closet for couple of years and now the led lights won’t power on but the tubes warm up. No sound will come out and all the fuses are good. Can you point me in the right direction before I have to send it to peavey. Thanks

  8. Mark Laylo

    Good day! I have a vypyr 15 and maybe you can help me to have the schematics of it. There is a 5-pin amp inside and it was burnt out. The type and markings were erased and i want to know what is this so i can repair it. Thank you in advance!

    1. Florian

      Hi, in my Vypyr 15 this amp is a TDA2040 from ST.

    2. Todd Artley

      The amp chip you are looking for is TDA 2040

  9. Adam

    Hi, sir… My question is simple: will the Voodoo Labs Ground Control Pro work with my Vypyr 75 watt amp? I have a chance to pick one up for 100 bucks and want to know if it will work. Do you perhaps have the cc command list for the vypyr?

  10. Mack Holbrook

    Glen I’m having a problem with my Vypyr VIP 3. It plays great at bedroom volumes with no issues, but when I try to turn up the volume and power sponge and play through it, it will cut off and not come back on for a little while. Does it sound like an overheating issue? I’ve thought about adding a computer fan to keep it cool, if that would be helpful.

  11. Tai

    Hi, I have been googling an issue I have been on my vypyr vip 2 and can across your page. You have some great information here, thanks!
    Everything thing works fine for 10 to 15 minutes, then the sound just drops away to nothing over a second or two. When I plug headphones in there is still no sound. All the dials and lights seem to be working as expected.
    I have tried resetting and the issue remains. If I turn it off and come back some time later it works again for another 10 minutes.
    Any ideas?

    1. Glen

      Sounds like a bad power supply.

      1. Andrei

        Why do you think so? What exactly indicates a power supply?

  12. AU1134

    Recently I’ve started picking up a groundloop buzz along with what sounds like computer data bus noise on my Peavey Vypyr 30. Even on different circuits within my home.

    I’ve been trying to determine where a ground may have broke with continuity tests but so far I’ve come up with nothing. Even tested the outlets for ground which they do indeed have.

    Now my suspicion is that it’s the Peavey because I have another amp that sits on the same circuit, a Raven RG60, that’s whisper quiet with just an instrument cable plugged in with the exception of the gain hiss.

    What options are there to alleviate the noise?

  13. John Klee

    Hello, I have a Peavy Vyper 2. Its new to me, have played through it for about 2 hours, then I wanted to check out the computer adjust-ability – the reason why I wanted this amp… it said it had the wrong firmware and needed to be updated.. So I did, now I get no “light show” and from what I have seen, I need it to be reprogrammed, but the USB does not work…. is this something that you can fix?? I can send just the amp minus the cabinet and speaker. I just want to play though this amp.

    I have left you a message on your youtube fix and sent you an email.

    thanks for the response.


    1. Glen

      I have done this for people in the past. Where are you located and do you have any geeky friends with Raspberry PIs or Arduinos who could help you out?

  14. Linda H. Gardner

    hello glen i have a vypyr 3 that bricked on a bad download can i send the dsp board to you to fix it please

    1. Glen

      I do this on occasion. Where are you located?

      1. Mark

        How about reloading software for VYPYR 30, please.


  15. Ben

    I came across your site looking to troubleshoot my Vyper VIP3 and Sanpera II problem.
    I plugged in the other day and my Sanpera II pedal was not working. There is a glow on the pedal screen but no text and none of the LEDs are lit. I brought the pedal (and cable) back to guitar center and plugged it in to another vyper and it worked fine, which leads me to believe there is a problem at the amps Midi jack. Have you come across this? Would a factory reset work? or am I likely going to have to replace a board in the amp? What kind of project would it be to replace the input?



    1. Glen

      There were problems with the DIN plugs that Peavy used in the earlier Vypyrs. You might want to check to make sure that the DIN connector is getting all the way into the socket (and that the socket isn’t pushed back too far for a good connection).

  16. Colin Donahue

    Hi, I stumbled across your site looking for troubleshooting guides or any other info on common issues for Vypyr VIP2 amps. I have one (technically a friend’s) that I had been using for a few months & generally liked it. It was plugged in & powered up one day & I heard a loudish *pop* & it simply died. It won’t power on at all. I have opened it up, simply because the fuse is inside the head, but the fuse appears to be fine (1.6~1.7 ohms across it but definite continuity.) I substituted a couple of other known good power cords to eliminate that as an issue.

    Previously the only indication that anything was amiss was that the lights surrounding a couple of the pots (in the middle of the bank but I’m not sure which & can’t recreate, no power) seemed to rotate backwards relative to the rotation of the pot. I don’t care enough/it isn’t worth it monetarily to pay someone to fix it, but I have at least some limited ability, a multimeter & a soldering iron, and I have nothing really to lose in trying to fix it myself since it is a door stopper at the moment. Have you heard of this issue? Do you still need interior pics of the amp? I’d be happy to provide them if so. Thanks in advance-Colin

    1. Glen

      (1.6~1.7 ohms across it but definite continuity.)

      Sounds like a bad fuse to me. Did you remove it from the circuit for this measurement? Trying to test a fuse in-circuit does not work.

      Bigger question is why did the fuse blow?

  17. Tom

    Hello all,

    I just got a VYPYR 75 and would like to rebuild it into a bass combo using an Eminence Kappa 12A speaker. I will close the cabinet that will be vented (bass reflex).

    Now to things digital: the bandwidth of the equalizer (especially the bass knob) is pretty narrow and works on a different frequency that I would like.

    Is there a way to change these settings digitally? Or is the sound network analogly ‘hard wired’?

    Thanks in advance,

    1. Glen

      Is there a way

      There is always a way, unfortunately there isn’t a practical way. The equalization is performed digitally by the software. You would need to change the software to alter the EQ curves, and as far as I know the source code for the software is not available.

      Peavey modeled the EQ for each of the amp models on the amp being modeled. You will probably find that the EQ behaves quite differently on each of the amp settings. Try them all, you may find one that works for you.

  18. Cal

    I have a problem with the power sponge popping and crackling when touched. It makes those sounds and cuts the volume dramatically. What would happen if i disconnect the power sponge wire? Would it affect anything?

    1. admin

      Sound like a loose connection to me. You might check the edge board connecter between the DSP board and the power sponge/Power amp first.

      1. Patrick

        Hi, is it possible to connect a dsp print of a vip2 directly to the powersection of a tube 60?
        Meaning of all connections are the same of the Vypyr 30 and vip2 dsp prints?




  19. stacy

    good Collection…

  20. Brew

    Have Vypyr 2 Vip 2 and if you turn the unit on all the lights flashing in sequence over and over again . Unplug input board and lights work like suppose to. So i replaced input jack assy. Still same problem can you give me some suggestion on cause.

  21. Andy

    I mistakenly bought a Sanpera Pro foot controller, thinking it would work with my Vypyr 212 tube combo, but alas it does not The return data from the amp appears to work, but none of the buttons do anything. Is there anything that can be done about this? Some custom firmware that can be flashed? I have a Ground Control Pro, which works great, but the two expression pedals are what attracted me to the Sanpera.

  22. Nick Carr

    I just picked up a Vypyr 75 and it is dead. I have been trying for hours to get it going. The fuse was replaced and tests good with a multimeter. When I attempt to power on the amp, there is no light show and there is only a soft pop of the speaker when powered off. I have a mac and can’t seem to find out how to download the firmware update. Please let me know how I can fix this amp.

    Thank you!
    Nick Carr

    1. Glen

      Good candidate to attempt reflashing. What part of the world are you in?

  23. neil

    hello glen i have a vypyr 3 that bricked on a bad download can i send the dsp board to you to fix it please

  24. Kirill

    Thanks much for this page! I own Vypyr T60 and I’d like to know if it is possible through sanpera’s midi make fx loop(send/return). Is it possible? Thanks for further answer.

    1. Glen

      MIDI is a serial digital protocol (no audio). If you are asking about an audio send/return to send the audio through a compressor or reverb or something like that, then no. It is not possible.


  25. Kenny

    Hey guys, ive got a problem with my vypyr 30. Its the original one that came out. I can play it for about 30 minutes before it stops outputting sound through the speaker. When that happens i can still hear it thriugh headphones, but no sound comes from the speaker. If i turn it off and leave it for another 30 minutes or so, the speaker works fine, but eventually stoos again. Has anyone had this problem before? I really like this amp so i would like to be able to fix it and use it again. Thanks for any helo you can give.

    1. Glen

      Sounds like the power amplifier is overheating (or the voltage regulator for the power board is overheating).

      Could be that the heat sinks for the voltage regulator or the amp chip aren’t physically tightly connected with lead paste. Try running with the chasis out of the cabinet and feel the VR and Amp chip when it shuts down. The one that gives you the second degree burn is the problem:)

  26. How about modifying the Sanpera 1.
    Would it be possible to add two foot switches to act like your pressing the 1&2 or the 3&4 foot switches on the Sanpera simultaneously?
    Because if I don’t get the 3&4 simultaneously for the looper then I have to re stomp it into aux mode & try again (The Sanpera’s are not really that balanced so every time you rock forward to ingage the main or aux the pedal lifts off the floor. So, I prefer not to have keep trying just to activate the looper.).


    1. Scot

      I was thinking the same thing after I got mine a few years ago.
      I was talking to a guy on a DIY Stomppeddle page.
      I he agreed that it seemed possible. I’ll find the pictures of the wiring and post if I can.

  27. Are there any actual pictures of the boards available or just the drawings.
    I h
    I bought a VYPER 30, thinking that it had a USB (Because,the Peavey sticker on the Amp said the 30 Watt had ,”Studio Quality USB.”.
    I’m not good at schematics. So, if I could see the insides I’d have a better idea as to if I could get a USB board and just be able to plug it into the board on the Amp, cut a slot for the plug and call it good.
    Or, if I’ll have to do some soldering if it’s possible at all?

    1. Glen

      You can kind of see the board on the 60 and 75 watt chassis pictures HERE. The board has the aux input and headphone out jacks on it as well as the USB port. If you look, you will see that it has two ribbon cables that go to the DSP board. Your Vypyr DSP board does not have the header pins on it. Adding them involves unsoldering the pin holes on the board, then soldering in a new pin header. If you aren’t familiar with using a solder sucker you are probably not up to taking on this task.

      With the header pins soldered into the DSP board, the next step is to buy an aux/midi board and a USB ribbon cable from Peavey. I have not priced these recently, but they used to cost around $40.00.

      New Peavey board in hand, the next step is to fabricate a board mount in the chassis to hold the board and to drill holes for the Aux input, headphone out, and USB B connector somewhere in the chassis (nothing says they have to be on the front). If you aren’t familiar with metalwork in small chassis boxes I can assure you that this will end up looking like crap, so seriously consider mounting this on the back of the chassis instead of the front.

      As I said in my other response, the end result (Peavey USB connection to computer) truly is not a valid solution to recording your riffs. The only reason to consider doing this is for the novelty, not for the music.

  28. Would it be possible to put a USB on a Vyper 30.
    I bought one when they first came out. When I got it at the store I took it out the box and tested it (Before I paid for it.).
    It had a nice sticker on the front speaker that said, “VYPER 30 Watts Studio Quality USB.”
    I thought that I had to by a USB adapter to plug into the MIDI port (Computers were just starting to take leaps. So,I inquire about it.).
    After, I got a computer that I thought would be able to handle the systems requirements I started to look into how to take advantage of this “Studio Quality USB”.
    Even though it says that it has a Studio Quality USB (I still have the sticker on the side of the amp.) I can only find out that it is only available in the higher Watage VYPER Amps.
    So, would I be able to put a USB port on my 30 (Like it should of already had.)?

    1. Glen

      Is it possible? Yes, but the better question should be does it make sense. I’ve spent a lot of time and effort messing with recording using the Peavey USB port and can tell you from personal experience that the Vypyr USB implementation is not adequate for recording. It is limited, tends to be noisy, Is difficult to match signal levels with computer inputs and the list goes on.

      Assuming that you are looking for a USB connection to record direct from your amplifier, just say no. Reasonable audio interfaces are readily available that do a much better job at very reasonable cost that really work for recording (zero latency monitoring, proper impedance matching, headphone and line/computer outputs, etc.). Buy something like a Scarlett 2X2 audio interface and connect your Vypyr to it using the headphone out on the Vypyr to the Interface.

      Just recording your guitar riffs isn’t something that you can do much with. Once you’ve done it you will wonder why. Find a good DAW (Digital Audio Workstation) program for your computer and start doing your own multi-track recording. Lay down the rhythm for a song then play your leads to complete the song. You might even consider getting a good microphone to plug into the interface and do some vocals.

      Yeah, it is possible to solder in the USB jumpers in a Vypyr 30, change the model dip switch settings on the encoder board and buy/install a USB board from Peavey, and connect your Vypyr to your computer. My advice is that it isn’t worth the effort.

      Lots of good DAWs out there. If you have a Mac you already have one installed (Garage Band). I recommend Cakewalk products with Home Studio being a great starting point (about $60.00) or Reaper can be run in demo mode forever.

  29. Glen, You did a great job, I wanted to know if there is a way to add effects loop in this amp just after the AMP channel….so that we can put in Noise gate(that is just after the Amp’s drive), EQs, different analog effects…..followed by the amp’s inbuilt reverb and delay and then the output.

    Since you have studied the schematics it would be easy for you to state…just a little push in my direction of thought would be enough. Thank you, 😀 😀

    P.S.:Mine is Peavey Vypyr 30

    1. admin

      There is an effects loop mod that you should be able to find in the Peavey forum. This sits between the final DSP altered output and the power amplifier. Not quite what you are asking about, but it is about as close as you can get with DSP modeling I’m afraid.


      1. Thanks a Lot glen 😀

  30. Glen,

    Thanks for all the information!

    I don’t know if this will help you or not but I’m looking at the main board from a silver Sanpera 1 and it has the same part number as the Sanpera 2 in your schematic.
    If it would be of any help I’ll compare and let you know what parts are not loaded on the 1.

    The reason I came across your site is that this Sanpera 1 (again an older silver one) does not light up with my daughters brand new VIP 3. Do you know if the older Sanperas are compatible with the new VIP’s.

    Again thanks for the info!

    1. Glen

      The Sanpera’s are all supposed to be compatible with the VIP amplifiers. You aren’t getting any lights on the Sanpera? I have had problems where the MIDI cable

      1) did not plug in all the way because the chasis on the amp interfered with the plug edges
      2) plugged in upside down (bending pins). The socket is ‘upside down’ on the Sanpera
      3) plugged in one pin sideways.

      Also, if you are not using a Peavey supplied cable you may want to check that all eight pins (and the shield) are connected through. Some eight pin cables are only wired for seven pins.

  31. Do you know which screws take the 75w chassis out? Would be much help if you coukd clarify here thank you!

    1. Glen

      There are four screws on the top of the amplifier. These are on the metal strips. These are long screws and must be completely removed to take the chassis out. No need to unscrew the handle. Then, on the back of the amplifier there are two screws holding the back of the chassis up.

  32. Hi.
    I have another problem
    One time im turn on my vypyr 30 but… Sanpera doesn`t work. It`s realy dead all is turned off (leds, pedal doesn`t work). I`ve tried to check cable but aslo with connection with midi slot signal passed but all is dead. Where is the problem?

  33. Hi

    Looking for some help with a VYPYR 30 amp, owner has been using aux out and headphones jack to run through computer

    we now have no output from the power amp (headphones good) power amp seems to be working, but no audio signal getting to the board struggling to find where iam loosing the signal

    noticed U3 running hot 5V supply is this normal

    1. admin

      This seems to be an all too common problem. The headphone jack ‘switch’ is way under engineered and breaks with the slightest abuse. It is fairly easily replaced (and inexpensive from Peavey parts). A better solution would be to wire in a proper 1/4″ switched jack on the back of the chassis.

      1. will try that but headphone socket works when headphones are plugged in, i take the headphone jack disconnects the input to the power amp was not clear to me maybe need to print the schematics out on A3 LOL

        gonna contact peavey hopefully they will have a stockist in the uk

      2. Hi. I have another problem
        One time im turn on my vypyr 30 but,, Sanpera doesnt work. Is realy dead all is tufned off (leds, pedal doesn`t work). I`ve tried to check cable but aso wit connection with midi slot signal going but all is dead. Where is the broblem?

  34. Hi, I posted in the updater blog about my amp. I’m 99% convinced now that the issue is the MIDI board. I’m not thrilled with the idea of sending in the control chassis to Peavey to fix it, since I think it’ll cost too much (shipping + parts + $55/hr). Do you think I could just replace that board to restore MIDI communication? Is there any other test I could perform to ensure it’s just that board and not the DSP board? Encoders work in test mode…

    Thanks for any advice you may have.

    1. admin

      The USB board is pretty inexpensivw and real easy ro replace.

      1. I assume you mean the MIDI board. I will call them for pricing and info, thanks!

  35. Reuben

    hey nice website
    I need to replace the resistor on the midi board ” R2 ” It should be 1.1 K ohms instead of 2.2K ohms. Part # 30200175
    would it be an easy fix?
    if so would it also be an easy part to purchase on a local hardware/electrical store?
    or does it has to be through peavey?
    i mean it only costs .49 cents through peavey but i would love to have it asap instead of waiting to get it shipped


  36. Larry Braniff

    Do you have a photo of the 30 Watt Vypyr?

  37. Larry Braniff

    I have been looking through these schematics and I am curious is there a diagram from the foot switch board P1 to the 8 pin midi plug.

    1. Glen

      Not sure specifically what you are looking for, but there are four of them on the main borad in the Sanpera II schematic. P1 doesn’t go to the MIDI port. It goes to the Sanpera board which then connects to the MIDI port.

      1. Larry Braniff

        What I am trying to find out is if it possible to run a basic foot switch through the midi port or does it have to be the Sanpera. I saw a video where a guy build a home made foot switch that he ended up having to solder to the back of board where the controls are located. It worked great but would rather see if it would possible to go through the midi connector like the Sanpera.

      2. Larry Braniff

        I was referring to p1 in the Sanpera I switch/led schematic. Where does that go.

        1. Glen

          Larry – The MIDI port is a MIDI port – not just a switched line. If you want to switch your Vypyr you need to use the MIDI protocol. There are a couple of other MIDI options other than the Sanpera, but there is no way to use a simple foot switch for this.

          P1 goes to an 74HC165 on the mother board that is read by an CY8C27443 which converts the action to MIDI CC commands and sends them to the Vypyr using the MIDI serial protocol.

          1. Larry Braniff

            Thanks Glen, I figured that I havent studied or used the midi protocol to understand it so my best method would just buy one.

            Thanks for time I appreciated it very much

  38. facebook.com/profile.php?id=100000371366094

    Glen.. While looking through your pages I came across the ‘Pimp Your Vypyr’ link. This looked pretty interesting since I own a Vypyr 15. Unfortunately, the page it takes me to, drieg.com, is flagged as harmful by my Firefox browser. Could you verify that this is a non-harmful page? Or perhaps notify the page owner of the problem?

    Also, I’m going to be taking a closer look at your Virtual Vypyr program later today (gotta take my grandson fishing this morning). I’m a retired programmer with 31 years of computer graphics experience. Maybe I can put my experience to good use.

    1. Glen

      Thanks for the heads up. I checked the site and also found that it appears to have been hacked. I have removed the links from this site and posted what I hope are appropriate warnings. Petr is a straight up guy so I’m sure that wasn’t anything that he did intentionally.

  1. Japan


    I like this page I think only those people who loves respect and like these pages

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