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VOX ac30 AND MAGAIR 3000,hi just looking for some circuit diagrams or technician manuals for these

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There are many versions of the AC30.... here is one of them Good luck

Posted on Jan 12, 2008


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Posted on Jan 02, 2017


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What year is my vox ac 30 / 6 ser. no. 04185

Hi Kieran.
not sure if this link will help you out but have a look.
What year is vox ac30 6 ser no 04185 Google Search

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Vox vt40 factory reset

Consider reading the Manual for this amp, it explains how to reset to factory with the VFS5 footpedal. Or with the power off ..hold down CH1 & CH4 then turn power on.. when the Bank & Channel leds start blinking.. then release the Channel buttons. Next press the Tap switch ... the bank & channel leds will change from blinking to lit. with in a few seconds it will enter preset mode.

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Hello fixya. So I have placed new pots on a Vox VT30. Tested it and it worked fine. My son was playing while I replaced the back panel. A screw was too long and touched one of the pots. It shorted out...

This might be the schematic for your unit:

Scroll down to the link "Get Manual" to download the PDF file.

I don't see any connection on a pot that could be touched to cause the problem. OFTEN when screws are too long and they touch a board they can crack the circuit traces or PUSH etch to cause a short.

Use a BRIGHT LED flashlight to "candle" the board for cracks or scrapes. The voltage regulators are current limited and self protecting. The first thing is to determine what the screw touched and look for damage in that area.

I hope you replaced the pots with the CORRECT TAPER as well as resistance value. Whille incorrect taper would not inhibit operation, it would make adjusting the pots in use somewhat difficult.

Apr 14, 2011 | VOX Amplification Vox VT30 Valvetronix...

1 Answer

I Need The Full Wire Diagram Of Hero Honda Glamour & Hero Honda Splendor.Can You Help Me About That?


It would be better to look for the circuit diagram given in the manual of these bikes. Every bike has a manual which has the circuit diagram.

Hope this helped.

Please give me a vote if it was helpful.

Mar 01, 2011 | 2006 Hero Honda Glamour

1 Answer

My guitar amp has power(Lights up),but no sound.Fuse was good,the one right by the power plug in.No blown capacitors or resistors.100 att vox 2 by 12''

Here is a link to Vox: Start by checking the wiring to the speakers and the speakers themselves.

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the mesa is for guitar and is not more than 100 watts, the neo dog is 100 watts it will fit but will give a different character because can be push to another limit of saturation the vox doesnt give that much.

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Hello, ive got a 1970's vox ac30 solid state amp and its sounds great except the vibtrem does not work, any ideas to fix it, thanks ade


You can get a circuit for your amp from here.

Not sure what you electronics ability is, but if I were repairing the amp, I would look to check that there is audio getting through the opamp stage 1C, then the function of the FET 2N3819 to provide the vibrato effect. It has an oscillator driving its gate, that too should be checked for operation. I know it is not a "do this to fix it" repair, but without being able to do these checks with an oscilloscope on the amp, nobody can say for sure what the problem is. If you have any questions, I am happy to talk to you about the amp. Good Luck with the repairs.


Nov 07, 2008 | Audio Players & Recorders

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