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Right Foot Boss
Gold Member
USA
881 Posts |
 Posted - 02/04/2010 : 19:44:26
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I fried it. 
I had it set up in my PB-1000 and I accidentally plugged in my 18v DC Brick adapter into the 9v input of the PB-1000. Now my 1980 SS CE-2 is dead.
Hopefully someone here can cast a raise dead spell on it so I may continue to jam with my favorite chorus. Any clerics out there? |
Edited by - Dr. Bob on 02/08/2010 08:15:34 |
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Pedal Dan
Silver Member
USA
419 Posts |
Posted - 02/04/2010 : 19:53:29
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| Man, that just sucks! Hopefully you just popped the diode in the input stage( you'll see it burned up. My AD-80 is 18v and I have to be careful as well 'cause it has the same 1/8 inch adapter as my vintage TS-808's. Laurie's the guy to ask for help! Good luck! |
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ChristoMephisto
Platinum Member
Canada
1288 Posts |
Posted - 02/04/2010 : 23:03:39
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Wrap tape near the end to 'colour-code' them so you can distinguish which is which.
No good at Raise Dead spells, but I can cast Green Fog spell with ease |
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Brutalitarian Supremacy
Silver Member
USA
270 Posts |
Posted - 02/04/2010 : 23:11:30
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quote:
Originally posted by Right Foot Boss
I fried it.
I had it set up in my PB-1000 and I accidentally plugged in my 18v DC Brick adapter into the 9v input of the PB-1000. Now my 1980 SS CE-2 is dead.
Hopefully someone here can cast a raise dead spell on it so I may continue to jam with my favorite chorus. Any clerics out there?
wow man I need to gain a few more levels before I can cast that madness!...but even if I could you still have a few problems...for starters you would have to mail it to me because the target of said casting must be within 3 ft. of the caster...and finally the spell clearly states that the target must be something that has died of natural or unnatural cause(must be a human or humanoid/beast ect...tiefling's and creatures from the lower planes do not apply)...but you might try polymorphing it into a humanoid and then we could fix her...but then you would need a Mage to cast that one...which I am not! |
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verivorax
Platinum Member
Canada
1185 Posts |
Posted - 02/05/2010 : 04:21:29
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Fried CE-2 is Bad News!! 
Hope you can get someone to fix it up nice.. and hope it's just something simple!
I'm no mage either.. always a cleric. and a dwarf. |
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JCM800PDX
Bronze Member
USA
88 Posts |
Posted - 02/05/2010 : 07:23:14
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My understanding is that there is a protection diode that is installed in all Boss pedals for exactly that purpose - The diode will blow to save the rest of the pedal in the event that you feed it too many volts.
I'm no expert on the topic, but I've heard of people preforming miracles on otherwise dead pedals. Good luck! |
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natthu
Gold Member
Australia
756 Posts |
Posted - 02/05/2010 : 08:08:02
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Hey Right Foot, That sucks man... but don't panic just yet!
I did the same thing to my DM-2 a few moths back. It was just the protection diode as JCM800PDX mentioned. It's quite likely you'll only have to replace one component.
Perhaps have a look at the board - you should be able to see which components have burnt out and note the component number, or better yet post a photo. The resident experts should be along shortly to help you out  |
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zerksies
Double Platinum Member
USA
3406 Posts |
Posted - 02/05/2010 : 12:55:03
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| sorry to hear about that, i think there is a resistor that you need to change. Boss put that in to prtect the circuit in newer pedals i am realy not to sure about the older ones, maybe Laurie could shed some light on this topic |
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Dr. Bob
Moderator
Australia
6593 Posts |
Posted - 02/05/2010 : 14:18:10
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quote:
Originally posted by Right Foot Boss
I fried it.
I had it set up in my PB-1000 and I accidentally plugged in my 18v DC Brick adapter into the 9v input of the PB-1000. Now my 1980 SS CE-2 is dead.
Hopefully someone here can cast a raise dead spell on it so I may continue to jam with my favorite chorus. Any clerics out there?
Hi Right Foot Boss
What a sad story,
especially considering my fondness for the Little Fella's
Ok might not be too bad.
Most of the time you will have fried the protection diode
in the CE-2 & some other pedals it's an
11V (1 watt) Zener diode.
It's there to protect your CE-2 & it's probably done it's job.
You will have to replace it with another 11V 1W zener
If you can't find an 11V one, a 12V one woks just as well.
PM me - I will send you all the info & pics of what to look for.
Do you have a soldering Iron & a multimeter?
Or a mate that can help you out.
With cation - you can run any CE-2 without the protection diode in circuit,
lift one end of D7, it's just under wire marked (9)-red and (11)-Light Bluish.
If you have the diode out of circuit, only test it with a 9V battery
and be 100% sure you connect it right way around the first time, as there is now NO PROTECTION.
If it's just the diode you will have your baby back.
And can replace the diode later.
Most times the Zener dies in short circuit mode - That's the good scenario, it protects the pedal, by shunting the power to ground.
sometimes it can damage the supply.
If the zener is shorted & you test it with a battery the battery sill get wam & then very hot, because it running into a short circuit.
But if it dies Open circuit then unfortunately the 18V mught have made it into the rest of the pedal - not good senario.
Hey Right Foot Boss
If you can & have a digital camera.
Please upload some pics of the front & back of the PCB
so we can see if the 18V possibly took out the filter caps just after the Zener, but this happens very rarely.
It's just me be extra cautious.
As I wrote before PM me, I belive you mailed me once before a while back
And lets see if we can fix you CE-2 by remote control.
I realize this is probably too much info, but it's best to know as much about the situation as possible.
And you just attended another short course in "Electronics 101" with Dr. B.
It's probably just the diode.
Anyway whatever it is, we can most likely fix it.
Regards Dr. Bob 
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Dr. Bob
Moderator
Australia
6593 Posts |
Posted - 02/05/2010 : 15:01:16
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Hi Right Foot Boss
--- UPDATE ---
Please check your PM.
It was a slow Friday night ... 
Regards Dr. Bob |
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Right Foot Boss
Gold Member
USA
881 Posts |
Posted - 02/06/2010 : 07:39:58
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I knew there were other D&D mates here. 
Thanks for the replies, and yes I am going to color code my adaptors from now on.
Thanks for the PM Dr. Bob. Here are the pics I sent you for anyone else who may be willing to cast their soldering spells on my CE-2.
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Dr. Bob
Moderator
Australia
6593 Posts |
Posted - 02/06/2010 : 13:37:18
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Hi RFB
OK & thanks for the pictures.
it does look like the 18V managed to fry the two electro caps as well
That definitely looks like the cap has spewed it's electrolyte.
For starters can you please measure D7 the zener with a multimeter.
From the description, if it's pulling down all the other pedals, it's shorted - that's a good thing.
If you don't have a multimeter to test the diode, please lift one end of D7, that way it will be electrically out of circuit.
Then with a KNOWN GOOD battery test the CE-2 - even with the caps the way they are.
Be super careful not to reverse the battery on the clip,
as there is no longer any protection, it's safe to test pedals this way.
As long as you are aware of the situation.
It will be a good indication if the CE-2 is mostly working.
Then report back.
We can sort out the caps later.
In my PM, I asked you to tell me if the 18V supply,
has a negative tip like a PSA,
or if it has a positive tip?
I need to know this for further diagnostics.
We are now waiting for your reply.
Good Luck
Regards Dr. Bob
PS - The two electro caps are:
C29 100uf 16V
C30 220uf 10V
In reality and at a pinch you can replace these both with 220uf's 16V.
They are just filter caps, it's just physical size constraints that you might run into.
If you were closer, I would just give/send you the bits, it's all $2 to $5 total, the 11V zener is less than 50c even in Aussie dollars.
Be careful of the spewed electrolyte, it's Alkaline, & can irritate skin.
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Edited by - Dr. Bob on 02/06/2010 13:38:41 |
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Right Foot Boss
Gold Member
USA
881 Posts |
Posted - 02/06/2010 : 23:58:09
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Good news. The little D7 zener did his job. I don't have a multimeter so I did the battery test and it lit up. I assume that is a good sign.
Also both adapters are negative centered. Hope it is just as simple as replacing those few parts? |
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Dr. Bob
Moderator
Australia
6593 Posts |
Posted - 02/07/2010 : 06:20:57
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quote:
Originally posted by Right Foot Boss
Good news. The little D7 zener did his job. I don't have a multimeter so I did the battery test and it lit up. I assume that is a good sign.
Also both adapters are negative centered. Hope it is just as simple as replacing those few parts?
Hi RFB
That's really good news
Ok now you'll have to buy a few parts from your local electronic supplier.
Replace
D7 11V (1watt) zener diode 12V is ok as well.
C29 100uf 16V
C30 220uf 10 to 16V
and for good measure also replace
C18 47uf 6.3V
C20 47uf 6.3V
C9 1uf 50V
Remove the caps one at a time.
Clean all the spewed out electrolyte of the PCB with some ear bud cleaners, I think you guys call them Q-tips
make sure you move all traces of the electrolyte
If you have no PCB cleaner, use metho, only dip the q-tip in once so you don't contaminate the metho,for the next q-tip.
be very thorough cleaning this junk off, & keep it away from your skin & eyes,
it's an alkaline, & may irritate your skin, & it will definitely give your eyes a hard time.
Replace the caps one at a time - being careful of the polarity orientation, check the old cap & note which way the polarity was.
Same goes for polarity of the zener protection diode.
Good Luck
Final step
Check everything is in it's correct place.
And none of the fragile wires have fallen off.
Put it all back together, make sure it all works.
Buy yourself & your partner/wife a nice drink.
The Most important step:
Better still take her out to dinner, seeing you were lucky & didn't fry the rest of the expensive bits in your CE-2.
Tell her you saved enough for dinner by fixing it yourself.
and that you thought you would spend the savings on dinner.
Congratulations you are now a CE-2 repair Tech.
And well admired by your partner.
Regards Dr. Bob
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Right Foot Boss
Gold Member
USA
881 Posts |
Posted - 02/07/2010 : 07:48:27
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Bud cleaners... You Aussies are great. Thanks for your help Dr. Bob! Seriously you explained everything very well and I feel comfortable taking the iron to my lovely CE-2 now. Just to be sure, the negative polarity wire is of course noted by the --- dashes down the side of the cap right?
Thanks for that 'most important step'.  The Mrs. will be happy to know this. Shipping to Aus. isn't cheap. Kudos, Dr.Bob.
Regards,
Right Foot.
I'll let you know how it turns out when it does. |
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Dr. Bob
Moderator
Australia
6593 Posts |
Posted - 02/07/2010 : 09:43:55
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Hi RFB & Guys
Aluminum can electro's typically have the Negative lead marked with a black stripe down one side with little Negative signs in the black band.
Tantalum capacitors typically have their Positive leads marked with a couple of small +++ symbols.
may I suggest you get some desolder wick as well, when you by the replacement parts for the CE-2
It typically comes in 4 to 5 foot long rolls & will last you for ages.
It will make you life easier when cleaning up (wicking) old solder from solder joints.
If you have a few $$$ spare also get some PCB flux cleaner.
But at a pinch fresh clean Methylated spirits also works.
But take longer to dry/evaporate from the board.
Take your time - be patient - clean up that electrolyte under the caps.
as it can & will slowly corrode the PCB & surrounding components.
The zener diode is polarity conscious as well, the band on the body corresponds to the symbol on silkscreen on the PCB.
And I'm really glad you understood the most important final step.
Regards Dr. Bob |
Edited by - Dr. Bob on 02/07/2010 09:49:13 |
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Bad news from my CE-2
