Question about Orange Crush 30R Reverb Guitar Amplifier

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My amp only works when headphones are plugged in? its a 30 watt orange crush

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Try testing your speaker and related wiring first. Then check your headphone jack. Sometimes the jack fails and your speaker is disabled. A lot of them are soldered directly to the circuit board and develop a bad solder joint. Here is a link to a troubleshooter:http://www.geofex.com/ampdbug/ampdebug.ht

Posted on Aug 30, 2010

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1 Answer

Orange crush 20 watt amp wont power up, fuse is good


I have had switches fail. The type they use are common to fail. You can try snapping it on and off a few times real quick to see if it will start working, otherwise you can buy them in bulk from Digikey for a reasonable price- or steal one off a coffee maker.

With it unplugged, just flatten the tabs and push it out the back panel. Short the two wires and plug it in- the amp should turn on.

Mar 31, 2012 | Orange Crush 15r 15w Reverb Guitar...

1 Answer

How to play with headphones


If you have a preamp output jack or a headphones jack on the back- those will work. They should interupt the speaker if you are wanting it for practice purposes.

if you do not have those, and want to add one, tap at the control grid of the Phase inverter ECC83/12AX7A which should be common grid to the final preamp tube, which should also be an ECC83/12AX7A and locate the coupling capacitor so you can tap ahead of it with a .1 microfarad 600 WVDC capacitor or one that matches the factory capacitor in series to the new jack, with shielded audio wire/coax to the new jack location, at the tip and the coaxial jacket should go to chassis ground at both ends. The grid is either pin2 or pin7 depending which way they chose to wire it. I do not have an Orange Amp schematic in front of me.

If you want to risk noise at that location, make it interuptable so when the headphones are removed, the circuit completes to the N/C contact of the headphone jack (which opens/opened when headphone plug is inserted.) back to the grid terminal. with that terminal connected by shielded wire back to the grid.

Instead of adding a capacitor, you can use the factory capacitor, just mount a terminal strip next to the phase inverter and move the capacitor to that new terminal tab and the wire to lead to the tip together on that ear, and the return wire from the headphone jack goes to the now vacated tube pin terminal. .

Look to see if on of the filament/heater pins is grounded to chassis- if so, just ground the sleeve contact of the jack. If it is not, determine which pin is closest to chassis ground potential and run the sleeve contact over to that pin. could be either 4, 5, or 9 Make sure to use an insulating headphone jack.

EL34 outputs should never be connected to a headphone.

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1 Answer

My amp isn't producing any sound. It works when headphones are in but that's it. Please help


The headphones socket is on the preamp stage - it works so the problem must be after the pre-amp.
Do you get any sound at all from the speakers (hiss or perhaps a click) when you turn it on?
If yes it is an amplifier problem.
Here are some possible causes
  • A wire has come off the loudspeaker - easy to fix
  • Speaker protection fuse has blown - small glass fuse mounted on main amplifier chassis - replace with correct rated and type of fuse (note some of these are 'slow' blow type - important that you get the right one)
  • faulty component in the main amplifier stage - requires attention from qualified repairer
  • Loudspeaker burnt out - this can be tested by connecting another speaker across the terminals of the built in speaker.
  • The headphone jack socket automatically disconnects the loudspeaker when phones are plugged in - it could be that the contact in the headphone jack socket is bent and not re-making contact when the headphones are unplugged.

Feb 26, 2011 | Orange Crush 15r 15w Reverb Guitar...

1 Answer

I was playing my Orange Crush 20LDX that I just bought today and when I first plugged it in I could smell burning but I thought it wasn't that serious. After a while of playing, the amp still had power...


Since this is a brand new amp right out of the box, I would recommend returning it immediately to the dealer you bought it from. If it can't be repaired under warranty they might replace it with a new one.

Dec 18, 2010 | Orange Amps Orange Amplifiers Crush PiX...

1 Answer

I was playing my Orange Crush 20LDX that I just bought today and when I first plugged it in I could smell burning but I thought it wasn't that serious. After a while of playing, the amp still had power...


Unfortunately, the correct action here is to return the unit for a replacement one. Any attempt to repair this will void the warranty. Since you just purchased this today, the store should not give you any trouble and just exchange the unit. If you need to, insist on an exchange rather than waste time on a warranty repair.

Good luck,

Dan

Dec 18, 2010 | Orange Amps Orange Amplifiers Crush PiX...

1 Answer

I have a Marshall MG100HDFX 100-Watt Amplifier half stack (solid state) and I now am not getting ANY sound out of the amp. I changed the fuse and the power module behind the fan, and still no sound,...


plug headphone in the effects send jack...If you get somme sound (won't be too loud) there, that means preamp sections are probably ok. Drive a signal into the effects return jack... If power amp responds, it is OK... If both these are OK, then suspect the switch contacts on these two jacks that forward the preamp to the power amp when effects unit is NOT plugged in.
These contacts are a chronic problem.

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1 Answer

My line 6 spider iii30 30 watt amp works with


There is likely a switch contact on the headphone jack that routes the amp output to the speaker. These jacks on most music stuff are JUNK and the contact may not be closing.

If the spring contact is bent so it won't close you can bend it to contact BUT the springyness usually is gone and the contact will be marginal.

May 10, 2010 | Line 6 Spider Iii 30

4 Answers

Marshall MG50 DFX amp line out/headphones not working


Contrary to what's posted above, the Marshall MG series does not pass the speaker power output through the headphone jack, and inserting the headphones into the jack does not disable the speaker. The headphone amp is a separate circuit and it's input is taken before the master volume. So Jan's post is exactly right. Turn off the master volume and turn up all the other gain/volumes as high as they will go. The other issue is that the headphone jack's output does not drive low efficiency headphones well, so you need some headphones similar to Sony's MDR-V700s to hear it well. Earbuds just don't cut it.

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