Need help from DS-1 Owner here pls...

[miqbal]

Guys, see the picture above? It's a DS-1 Taiwanese  version (dual opamp version), taken from www.monteallum.com, text edited by me.

I don't have one, but I want some . Today I spent my afternoon creating a schematic for it (since I can't find one), re-tracing from images/photos that I can grab from internet. Unfortunately, I can't figure out the values of some components, so I am really hoping that any kind-hearted DS-1 Owner would like to  share that information to me.

As soon as the schematic completed (Its 99% completed already, except components above ), I will post it here and share it to the forum

Any help will be highly appreciated.
Thank you.

[5thumbs]

FYI, the link to your image doesn't appear to work.

Is your goal to build a DS-1 or build the schematic?  If it's the former, you might check out the DS-1 work-alike over at Tonepad.  It might save you some time and trouble.

Also, you can supposedly buy the DS-1 service papers from BOSS for $35.  I've been meaning to do that anyway, so I called their guitar/percussion tech support at 323-890-3700 x5322 and found that they are closed for Winter NAMM.  They'll be available again on 1/21.

So if you fix your picture link, you might get some help here.  Otherwise, you can look into the Tonepad DS-1 or get the schem directly from BOSS.  Sorry I couldn't be more help at the present.

[miqbal]

Hi 5thumbs, thanks a lot for your reply.

So if you fix your picture link, you might get some help here.
Here you go,
http://www.monteallums.com
http://www.monteallums.com/images/DS1_PCB.jpg

Is your goal to build a DS-1 or build the schematic?
It's the schematic first, and its already been finished 99%, except the value of the component above. And its always nice to design your own PCB

you might check out the DS-1 work-alike over at Tonepad
Tonepad's is quite different. No R40, and some components especially for "the Newer Version" are different in value, comparing to the picture above.

I even think that R40 is a fake resistor, because its connected in uncommon way (from output-pin 7 to VCC). thats why I need the help from DS-1 Owner. For the ceramic caps, I gues it might be 470p, but for the shake of convenience.... .

[5thumbs]

So if you fix your picture link, you might get some help here.
Here you go,
http://www.monteallums.com
http://www.monteallums.com/images/DS1_PCB.jpg

Oh, I thought it was a link to your in-progress schematic.  I've modded both of my DS-1 pedals with Monte's kits, so I know that DS-1 image quite well.

Is your goal to build a DS-1 or build the schematic?
It's the schematic first, and its already been finished 99%, except the value of the component above. And its always nice to design your own PCB

Agreed.   I've wanted to have a good post-1994 DS-1 schematic for the occasional DS-1 repair/de-mod I end up doing for others.  Being richer in dollars than time (at least on this project), I just planned on getting the service paper from BOSS...someday.

I even think that R40 is a fake resistor, because its connected in uncommon way (from output-pin 7 to VCC). thats why I need the help from DS-1 Owner. For the ceramic caps, I gues it might be 470p, but for the shake of convenience.... .

R40 reads at 1KΩ on my DS-1, so it does not appear to be a dummy resistor.


As for the ceramic caps, here are the values:

C4   = 251K = 250pF, +/- 10%
C7   = 101K = 100pF, +/- 10%
C16 = 471K = 470pF, +/- 10%
C17 = 471K = 470pF, +/- 10%
C18 = 221K = 220pF, +/- 10%
C19 = 221K = 220pF, +/- 10%

Just in case you need the film cap values, here they are:

C1   = 473K = 0.047uF, +/- 10%
C3   = 473K = 0.047uF, +/- 10%
C5   = 683K = 0.068uF, +/- 10%
C10 = 103K = 0.01uF, +/- 10%
C11 = 223K = 0.022uF, +/- 10%
C12 = 104K = 0.1uF, +/- 10%
C13 = 473K = 0.047uF, +/- 10%
C20 = 473K = 0.047uF, +/- 10%
C21 = 473K = 0.047uF, +/- 10%
C22 = 103K = 0.01uF, +/- 10%

Here are the electro cap values:

C2   = 0.47uF
C8   = 0.47uF
C9   = 0.47uF
C14 = 1uF
C15 = 47uF
C23 = 100uF

The transistors are JIS coded.  Here are the tranny types:

Q1   = C2240 = NPN transistor 2SC2240
Q2   = C2240 = NPN transistor 2SC2240
Q3   = C2240 = NPN transistor 2SC2240
Q4   = C2458 = NPN transistor 2SC2458
Q5   = C2458 = NPN transistor 2SC2458
Q6   = K30A = N-channel JFET 2SK30A
Q7   = K30A = N-channel JFET 2SK30A
Q8   = K30A = N-channel JFET 2SK30A

You should have everything else sorted out from the picture (1N4004 power diode, 1N4148 signal diodes everywhere else, resistor values are self-explanatory with a little research).

Good luck!

[miqbal]

WOOOW , 5thumbs, thank you so much my friend. You really really have gave me moooore than I've expected . Ok, wait till I get home (Still work hours here )

One more question: Is it OK if I post the schematic here, or should I post it in the MEMBER section? Just in case....



PS: I don't know why, but the DS-1 image that I have posted in the beginning of this thread seems to be dissappeard.
I have re-posted it again.

[miqbal]

CLICK here for the original file.

Component numbering follows the PCB numbering. I also try to include the cable number.
As usual, corrections are welcome.

Enjoy!

[WGTP]

Thanks.  Now you will be famous.   

[moro]

Very nice! Thanks for posting this.

[5thumbs]

Nice schematic, migbal!  I didn't even notice that D2 was a Zener diode when I looked at the board for you.  Good eye on that one.

Thanks for the credit on the schematic.  I'd actually sat down last night to make an expanded PCB layout of gaussmarkov's Dr. Boogey layout that used PC-mounted pots and traces rather than the mess of off-board wiring...when I realized I couldn't get pots with long enough legs to do what I wanted mounting-wise.  That unfortunate reality gave me some free time to crawl around my DS-1 to get you the values.  (For those of you interested in this idea, I'm going to attempt to do a daughterboard layout that will use pin headers and fit into the existing pot-wire pads on gaussmarkov's PCB layout.  I'll post that layout in another thread once it's done.)

So we can thank Alpha and CTS for not making PC-mount pots in the configuration I wanted for me being able to offer some assistance last night.

Great job, migbal.  Thanks for doing this.

[miqbal]

Thanks guys, enjoy it!

gaussmarkov's Dr. Boogey layout that used PC-mounted pots

Do you mean those red lines?? No, no, the red lines that goes from fx board to the pots on Gauss's layout is ONLY a wiring symbol. Its not real traces, and not PC-mounted pots. He only want to show us the off board wiring, by using those lines.

[5thumbs]

Do you mean those red lines?? No, no, the red lines that goes from fx board to the pots on Gauss's layout is ONLY a wiring symbol. Its not real traces, and not PC-mounted pots. He only want to show us the off board wiring, by using those lines.

I know how the red lines work in his build doc, but thanks for clarifying them just the same.   I've read a number of posts about folks having oscillations/"squeal" due to having a mess of wiring all twisted up in the enclosure.  Since I was initially planning on building mine in a 1790-size enclosure, I figured I'd have plenty of room to extend the PCB and PC-mount the pots and run traces (and guard traces) up to the locations I want the pots.

So after thinking about it a little more, by using 12mm PC-mount pots, I could likely downsize it into a 1590BB enclosure.  Building a daughterboard that mounts into the pot-wiring holes on gaussmarkov's layout would give me the extra height I'm wanting -and- be able to layout the pot-to-board wiring in a way that won't allow wires to cross.  It also removes the requirement for long pot pins, which are probably a bad idea to begin with.  The daughterboard eats up the extra distance while allowing me to layout PCB traces for the wiring -and- not have to modify gaussmarkov's nifty layout.  I'm also going to investigate abandoning the pin headers between daughterboard and mainboard in favor of ribbon cable.  (I'm concerned the rigid pin headers would likely be a source of headaches due to cracked solder joints/lifted traces from vibration and normal handling.)

I don't have time to work on tonight (my paid employment is taking precedent), but I'll work on it probably tomorrow night.

[miqbal]

I got it, Brett. You're good to go. Can't wait for your Boogie report.
Hey, we are in the same path here, I will go for the Boogie right after my DS-1

[kurtlives]

WOOOW , 5thumbs, thank you so much my friend. You really really have gave me moooore than I've expected . Ok, wait till I get home (Still work hours here )

One more question: Is it OK if I post the schematic here, or should I post it in the MEMBER section? Just in case....



PS: I don't know why, but the DS-1 image that I have posted in the beginning of this thread seems to be dissappeard.
I have re-posted it again.

It says ASS on the bottom of the PCB. Sorry I just had too....

[ayayay!]

Can you repost the link for the schem?  It's broken.   

Also, since we mentioned R40, what does it do?  I always pull it. 

[5thumbs]

Iqbal:

FYI, I put together a PCB layout for this schematic last night.  I stripped off the input/output buffers and switching circuit, but other than that, it's true to your schematic.  Just build it with a 3PDT and you're good to go.

I've contacted Aron to make sure it would be acceptable to post this schematic/layout in the Schematics/Layouts section.  If he thinks it's OK, would you want to post your schematic in that area?  I'll make a build instructions PDF doc with your schematic, my PCB layout, ready-to-transfer PCB image and a parts list.  Of course, you'll get credit for the circuit reverse-engineering work and schematic.  I'll take credit for the PCB layout and throw in a 'thank you' credit for Aron and diystompboxes.com as well.

I'm going to review the layout again tonight to ensure it is true to your schematic.  (It has been the last couple of times I traced through it.)  If you would like to do this, please let me know.  Once I hear from you, I'll work on getting the doc drafted and I'll e-mail it to you for your review.

Thanks!

[Ben N]

Can you repost the link for the schem?  It's broken.   

Ditto

[5thumbs]

The site hosting the original image is up, but they may have pulled that image because it was using trademarked names in it.

I took the liberty of removing the trademarked name "BOSS" and modifying "DS-1" (but left everything else exactly the same) and posted the scrubbed image here: http://i228.photobucket.com/albums/ee157/five_thumbs/DeltaSigmaUnopost-1994Schematic.jpg.

We'll just have to wait and see if the powers-that-be let that one live, now that it should not be infringing on anyone's trademarked named brands/models.

[miqbal]

Sorry guys, I don't know why the link is always disappear.. again and again. The file is still there but the link has been somehow changed, bad photo hosting site???

This a new one, I have moved the file to my Google account and hope it won't disappear anymore.
EDIT: Please let me know perhaps you have got a low-res image, I hope google won't alter the resolution, like my previous host did.

http://lh6.google.com/iqbal.tiro/R5Bl8bBQ-vI/AAAAAAAAAEk/aBaWcumnbOc/ds1_sch_hi.jpg?imgdl=1

Thank you Brett, for doing me a favor, received your email. Looks like it is almost final, and please check for the reply, a tiny correction added:). Any news from Aron? Looking forward for the finished build instructions!

[5thumbs]

Sorry guys, I don't know why the link is always disappear.. again and again. The file is still there but the link has been somehow changed, bad photo hosting site???

This a new one, I have moved the file to my Google account and hope it won't disappear anymore.
EDIT: Please let me know perhaps you have got a low-res image, I hope google won't alter the resolution, like my previous host did.

http://lh6.google.com/iqbal.tiro/R5Bl8bBQ-vI/AAAAAAAAAEk/aBaWcumnbOc/ds1_sch_hi.jpg?imgdl=1

Thank you Brett, for doing me a favor, received your email. Looks like it is almost final, and please check for the reply, a tiny correction added:). Any news from Aron? Looking forward for the finished build instructions!

Muhammad, your new google link is broken as well.  My link above appears to still be working correctly (http://i228.photobucket.com/albums/ee157/five_thumbs/DeltaSigmaUnopost-1994Schematic.jpg).  Folks, please use this link until we get the build instructions posted in the schems/layout section here at diystompboxes.com.

In other news, Aron gave his approval for this to be posted in the schems/layouts area.  I'm going to get all the requests for space and stuff like that done, then I'll post the build instructions document there.  Once we get the build instructions doc up, we won't have to play round-robin on the image hosting sites to keep this information available to the forum.

[askwho69]

you two are really famous now! i read your article and love it!@!!! i want to ask! i change my ds1 ic with OPA2134PA and it sound so HUMMM and less distotion too illask why the chip it humming so loud?