Question about Dunlop Crybaby 9v Ac Adapter W/5.5mm Tip Ecb03

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My power conditioner will not power my cry baby, unless i apply pressure to the 9v adapter on the wah.

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If you mean applying pressure to the power connector on the pedal, a COMMON problem is that the soldering of the connector inside has broken loose or there is a crack in the circuit board inside. Open pedal and inspect for these problems.

Posted on Mar 21, 2011

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Posted on Jan 02, 2017

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As per my experience, I can suggest "Dunlop 535Q Cry Baby Multi-Wah".
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You can check its review in this link:
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It was probably connected backwards in polarity from a power supply which burnt a diode. These things have backwards polarity of 9v adapters which means positive on the outside of the plug and ground in the middle, unless you have the original boss power supply.If you have a generic power supply, cut the plug off and switch the wires and try it.

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Hello, sorry becouse my bad english but, i cant uncover my dunlop MXR fullbore metal... the bolts are so pressed, is please.. another question.. can I plug in other transformer, must be 9v...

You can try a couple of techniques to open the box.

Use a hair dryer to heat the bolts up which may weaken the hold. Use only enough heat to loosen the bolts. Do this by applying some heat and then try to loosen the bolt then apply a little more heat and try it again. If you have to apply so much heat that it may damage the finish or case stop applying heat and let the unit cool down. The heat caused the case to expand and when it contracts back to its normal size try to loosen the bolt again. Last is to cool the box in a refrigerator for a while in order to contract the metal and try to loosen the bolt.

Any nine volt AC adapter rated at 200mA or greater with a 5 5mm negative center plug will work with your unit.

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1 Answer

I have a CryBaby 535Q for repair, but everything is microelectronics and can't see if something is blown. The wah sound does not activate with the switch activation.

Check the switch itself... they OFTEN get broken mechanically... far more than the electronics failure. Use an ohmmeter to check the switch. Second most common failure is in the power adapters or use of the wrong adapter.

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1 Answer

Hi there, i got a 5150 half stack amp and the evh wah pedal, my problem is when i engage the pedal comes a terrible hum, i already change the cables, 9v battery and the ac adapter and the big noise...

WHY are you using a battery AND a 9 Volt adapter? This is an either/or thing. Chances are you have a defective ground someplace. Use just the battery and try it... If the hum is gone, the adapter is NOT compatible with the pedal. A lot of hum problems occur because the guitar is near a source of magnetic fields, such as an amp. An embarassing thing is for a musician to reverse the in and out connections to the pedal... it will have the symptoms you have mentioned.

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