Deep blue delay stop working after I reversed the polarity of the power.

[nguitar12]

Deep blue delay stop working after I reversed the polarity of the power, The 1N4001 is getting very hot even I use the right power now. I removed all the IC and the 78L05. 1N4001 still getting red hot. I am assuming the resistor will not damage in the way. What is the most likely damaged part in this case?

[nguitar12]

Deep blue delay stop working after I reversed the polarity of the power, The 1N4001 is getting very hot even I use the right power now. I removed all the IC and the 78L05. 1N4001 still getting red hot. I am assuming the resistor will not damage in the way. What is the most likely damaged part in this case?

ok the 1N4001 melt the trace i fixed it and it is all good now.

[antonis]

You should place a 1A slow blow fuse at your PS out...

(it will save you a lot of work - and your PS for sure..)

[nguitar12]

You should place a 1A slow blow fuse at your PS out...

(it will save you a lot of work - and your PS for sure..)

Thanks. I am going to add polarity protection for all my pedal. I always use the wrong power for my pedal...

[GibsonGM]

Can you get/make something with a different sized jack and plug, so you don't get mixed up?  *shrug*  It happens.

[bluebunny]

Thanks. I am going to add polarity protection for all my pedal. I always use the wrong power for my pedal...

"Always"?  Why?  I think you need to fix the problem, not the (unfortunate recurring) symptom.  

Edit: And we can help you with that, of course.

[Tony Forestiere]

Can you get/make something with a different sized jack and plug, so you don't get mixed up?  *shrug*  It happens.

...or put a matching color paint dot on the pedal power jack and PS plug.

[Thecomedian]

Thanks. I am going to add polarity protection for all my pedal. I always use the wrong power for my pedal...

"Always"?  Why?  I think you need to fix the problem, not the (unfortunate recurring) symptom.  

Edit: And we can help you with that, of course.

I don't know... I mean, wouldn't circuit protection just be more rigorous building practice? I'm trying to think of any reason why it would degrade circuit performance to have it in there, and possibly barring a simple fuzz, I can't think of any problems it might have with the rest of the circuit.  Its just there to pass on the right type of power and restrict the wrong type.

From a consumer product standpoint, I'd be surprised if there were a significant number of unprotected circuits on the market. It seems like a really good idea, especially when someone at guitar center gives you a 15 volt supply for a 12 volt pedal.

[Jdansti]

Thanks. I am going to add polarity protection for all my pedal. I always use the wrong power for my pedal...

"Always"?  Why?  I think you need to fix the problem, not the (unfortunate recurring) symptom.  

Edit: And we can help you with that, of course.

I don't know... I mean, wouldn't circuit protection just be more rigorous building practice? I'm trying to think of any reason why it would degrade circuit performance to have it in there, and possibly barring a simple fuzz, I can't think of any problems it might have with the rest of the circuit.  Its just there to pass on the right type of power and restrict the wrong type.

From a consumer product standpoint, I'd be surprised if there were a significant number of unprotected circuits on the market. It seems like a really good idea, especially when someone at guitar center gives you a 15 volt supply for a 12 volt pedal.

True, but circuit protection only works as long as you don't pump more current into the protection device than it can handle. Hopefully when there is a failure, only the protection device gets fried and not the rest of the circuit. 

[bluebunny]

"I keep crashing the car, but it's OK: I can wear a seatbelt."

Protection is definitely a good idea.  Why wouldn't you do it?  It saves you every once in a while when the gods conspire to throw a spanner in your works.  But I'd be pretty anxious to understand why I keep crashing the car...

[Thecomedian]

Thanks. I am going to add polarity protection for all my pedal. I always use the wrong power for my pedal...

"Always"?  Why?  I think you need to fix the problem, not the (unfortunate recurring) symptom.  

Edit: And we can help you with that, of course.

I don't know... I mean, wouldn't circuit protection just be more rigorous building practice? I'm trying to think of any reason why it would degrade circuit performance to have it in there, and possibly barring a simple fuzz, I can't think of any problems it might have with the rest of the circuit.  Its just there to pass on the right type of power and restrict the wrong type.

From a consumer product standpoint, I'd be surprised if there were a significant number of unprotected circuits on the market. It seems like a really good idea, especially when someone at guitar center gives you a 15 volt supply for a 12 volt pedal.

True, but circuit protection only works as long as you don't pump more current into the protection device than it can handle. Hopefully when there is a failure, only the protection device gets fried and not the rest of the circuit. 

Ah yes, you're right the circuit protection only works as long as its not grossly violated. Silly me 

[Jdansti]

^Right. 

Just repeating what I've read from the resident gurus. Reverse polarity with a 9V battery connected is probably going to have a different effect than reverse polarity with a 9V/ 2A adapter.

[Brisance]

Also if you add the reverse polarity protection, consider using a mosfet, diodes either drop precious voltage or in the other configuration short out and burn out.

[GibsonGM]

Goes back to 'real estate' again...takes space.  And adds a little complexity.  For the big manufacturers, it adds cost.   It's up to you if you include it or not, of course.  I always put the reverse-biased diode, and cross my finger.  I don't have any adapters anywhere NEAR my stuff that are of the wrong polarity.   But that could accidentally change, in the real world! 

[Moot]

I too reversed polarity on a pedal (chorus) - now stopped working....
Any idea on a fix?

[mth5044]

Going to need more info, but you should start a new thread.

[R.G.]

There are a bunch of posts in the last ... um, decade or so   that go:

"I reversed the power supply on my pedal and now it won't work. What could possibly be wrong?"  

The correct answer to that is, of course, that it's POSSIBLE that every polarized device on the board COULD be fried. They're all at risk.

Often, even usually, there is only one or two dead ones, and the debugging is to weed out what died as it should have, and what miraculously hung on and lived in spite of the Extinction Event.

Edit: It makes no sense to me whatsoever that a pedal would ever exist without a reverse-polarity protection setup. That's actually about as necessary as a metal enclosure. Sure it works without it - for a while.