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ozscotty
Copper Member
Australia
8 Posts |
 Posted - 01/12/2010 : 15:45:16
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Hi there,
Firstly - great forum - lots of helpful people by the looks!
I'm hoping to get some help on a DD-6 I have to repair. Looks like the digital supply components are toast.
Does anyone have a schematic/service notes for the DD-6? I've spent the last two evenings/mornings(!) scouring the net so I don't have my hopes up. DD-5 may be of help, or any of the 'twin pedals' - eg the OD-20 was helpful.
I think the controller (IC6) is a Seiko S-8520E33MC-BJS, but can't id the tranny (Q15) - suspect a MOSFET from literature - marked 'J B 3M'. Does anyone have experience with acquiring these components, or an alternate mod? I figure it's supplying 3.3V for the digital side, but not 100% sure. Maybe an alternate supply would do the trick, although its pretty tight in there..
Any help would be very much appreciated..
Thanks! |
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Laurie
Double Platinum Member
Canada
4854 Posts |
Posted - 01/12/2010 : 17:44:23
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G'day and welcome! There isn't a schem on the net for the DD-6. Don't see many (any really) dead, so I don't have any experience with them. Not what you wanted the hear I know... sorry mate!
Where in Oz are you from? I'm from Brisbane, temporarily in Canada. |
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Dr. Bob
Moderator
Australia
6593 Posts |
Posted - 01/13/2010 : 00:25:43
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Hi ozscotty
Welcome to the forum.
As Laurie has already said, neither of us have a DD-6 Sch. or the service notes.
Like that saying (rare as Hen's teeth).
What happened to your DD-6?
Revered polarity?
Over voltage?
Or worse, both?
Regards Dr. Bob.  |
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ozscotty
Copper Member
Australia
8 Posts |
Posted - 01/13/2010 : 00:54:31
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quote:
Originally posted by Laurie
G'day and welcome! There isn't a schem on the net for the DD-6. Don't see many (any really) dead, so I don't have any experience with them. Not what you wanted the hear I know... sorry mate!
Where in Oz are you from? I'm from Brisbane, temporarily in Canada.
Hi Laurie - I'm from Brisbane also! |
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ozscotty
Copper Member
Australia
8 Posts |
Posted - 01/13/2010 : 01:34:50
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quote:
Originally posted by Dr. Bob
Hi ozscotty
Welcome to the forum.
As Laurie has already said, neither of us have a DD-6 Sch. or the service notes.
Like that saying (rare as Hen's teeth).
What happened to your DD-6?
Revered polarity?
Over voltage?
Or worse, both?
Regards Dr. Bob.
Hi Dr Bob - Thanks also for the quick reply, and no worries, didn't have my hopes up! Can the tech notes be ordered from Roland? I feel like I ordered an ME-5 many years ago. Also, the DD-5 schematic may help. I saw links elsewhere but they're all dead. Maybe I'll go back to those threads and ask..
I actually just bought the DD-6 already dead - very cheap of course - the guy said it just stopped working after he moved up from Sydney. The batt clip is a little corroded, so maybe got a little moisture or sat around for some time with a leaky battery, but no other clues. The PWM chip and tranny I mentioned both show signs of heat damage but I'm hoping there's no damage to other components..
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Dr. Bob
Moderator
Australia
6593 Posts |
Posted - 01/13/2010 : 06:58:49
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Hi ozscotty
Just in a bit of a side note.
Wasn't the DD-67 one of the boss pedals that had a 5 Year warranty?
If might be worth perusing that course of action, if it is.
Is sounds like to have access to a bit of test & repair equipment?
Do you also repair gear, mod pedals & such?
I'm just being curious, as we have such a vast diversity of knowledge & skills here on the forum.
Regards Dr. Bob |
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ozscotty
Copper Member
Australia
8 Posts |
Posted - 01/13/2010 : 16:54:38
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quote:
Originally posted by Dr. Bob
Hi ozscotty
Just in a bit of a side note.
Wasn't the DD-67 one of the boss pedals that had a 5 Year warranty?
If might be worth perusing that course of action, if it is.
Is sounds like to have access to a bit of test & repair equipment?
Do you also repair gear, mod pedals & such?
I'm just being curious, as we have such a vast diversity of knowledge & skills here on the forum.
Regards Dr. Bob
Hey Dr Bob,
On the warranty - yes it does have a sticker on the box, but I have no idea when or where the original owner bought it. I wouldn't expect our friends would honour that without any history would they?
On me, well my early days as an air force techo armed me with decent faultfinding, 'high reliability' soldering and general hand skills. Unfortunately I 'retreaded' as an engineer mid-career and almost overnight lost all those skills!! ha ha. But my loves are still playing music and tinkering with gear..
So, I still have a few bits of test gear and an iron. And I guess enough years on the road to do basic fault finding and perform the odd mod in my garage, but don't get to do it for a living.
Sorry - got carried away - you're Dr Bob not Dr Phil!!
But, yes, just from reading I can see there's a great bunch of people out there with diverse contributions. In that vein, for the record (and search engine), my current Boss collection is BD-2(x2), RE-20, and the comatose (not pulling the plug just yet!) DD-6. Oh and an ME-5 and GX-700 on the shelf. And I want my SD-1, DM-2 and CE-3 back. (Don't want my HM-2 back!)
BTW, which fair city do you call home? And you work on gear for a living?
Cheers! |
Edited by - ozscotty on 01/13/2010 16:58:21 |
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Mesjoggah
Gold Member
Netherlands
595 Posts |
Posted - 01/13/2010 : 18:25:15
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| i bought a faulty DD-6 last november, i checked the serial number with the decoder here and it happened to be a 2007 pedal, i brought it to my dealer who sent it out for repair, last week i got a call that it will be rapaired for free! didn't have to show a receit or anything! so it definitely worth a try! |
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ozscotty
Copper Member
Australia
8 Posts |
Posted - 01/14/2010 : 03:53:49
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quote:
Originally posted by Mesjoggah
i bought a faulty DD-6 last november, i checked the serial number with the decoder here and it happened to be a 2007 pedal, i brought it to my dealer who sent it out for repair, last week i got a call that it will be rapaired for free! didn't have to show a receit or anything! so it definitely worth a try!
Hi Mesjoggah - wow! great to know they're so honourable!
Well, Murphy's Law - my SNo is DS44784 which came back with July 04. Ugh! - just 6 months over!
Does anyone know if there's a repair agent in Brisbane? Maybe I can order parts through him/her? My other strategy is to rig up a 3.3V conversion, maybe with a regular regulator. Thoughts?
For interest, here's my stab at the schematic (based on similar circuit in OD-20, however it seems to use a 'DIP' style MOSFET.. So, sub in a normal p-MOSFET, per controller chip spec sheet and presto..
..and here's the gore. You can see the damage on the controller (BJSM) top right corner and black ooze and o/heat solder on the large pin on the MOSFET (JB3M).
Thanks again for the tip Mesjoggah!
Oh, and does anyone have the DD-5 schematic? Geocities link is busted.
Cheers all!
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DD-6 Blown PS
