New switch for D5R

[glocke]

Greetings,
 
My christmas present to myself is a series I bass witht he power supply.  Unfortunately, even though it was packed very well, the mono/stereo switch on the power supply broke off, and does not work at all.  Does anyone have any idea how expensive or diffucult *should I choose to do it myself), this would be to fix?

[lothartu]

I'm actually in the process of repairing my DS-5 toggle switch so the repair should be the same for you.
 
First off I got this from Alembic
 
http://personal.atl.bellsouth.net/n/a/nanc6951/storage/alembicDrawingDS5.jpg
 
Then this is how I wired up my replacement DPDT switch
 
http://personal.atl.bellsouth.net/n/a/nanc6951/storage/dpdtWiring.jpg
 
I guess I'm not understanding the alembic diagram correctly.  When I wire it the way I have shown in dpdtWiring.jpg everything works fine in stereo mode (which it should because it's a direct connect for bridge and neck).  However, in mono mode both pickups come out the mono DS5 out (good) but the bridge pickup is hardly audible (bad).  The way I have wired it there is a 40k ohm resistance for the bridge pickup (hence the low output) and a 20k ohm resistance for the neck pickup (normal output).
 
This didn't appear right to me and I thought maybe I was reading the diagram wrong and it's supposed to be 20k ohm resistance not 40k and 20k.  So I pulled off my 20k resistor that connected pole 1 to pole 2 on my DPDT switch and instead directly connected pole 1 to pole 2.  Now it still works fine in stereo mode and in mono mode each picked is now of equal volume (since there isn't that extra 20k ohm resistor on the bridge pickup).
 
Sounds good right?  Well everything is peachy except for when I run mono mode I cannot toggle solo neck or solo bridge from my bass.  So my 4 position pickup selector on my Series I functions as...
 
1 Off
2 Neck(no sound at all)
3 Both(both come on, equal volume, peachy)
4 Bridge(no sound at all)
 
Just to make sure that it wasn't my bass internals I disconnected my 5 pin cable from my bass and plugged headphones directly into my stereo 1/4 out jack and tested my pickup selector.
 
1 Off
2 Neck(sound, only one ear, peachy)
3 Both(both come on, equal volume, peachy)
4 Bridge(sound, other ear, peachy)
 
Help.  What am I doing wrong here?
 
Here's the serial number if it might help. #885014

[mica]

The original schematic is the standard way to wire the switch. Ron looked at your legend and made the following corrections:
 
4 from bridge
1 from neck
6 bridge out
3 neck / mono out
1 resistor 5  (20kOhm)
5 resistor 6 (20kOhm)
 
That should do it. Let us know if that fixed it up.

[lothartu]

Cool, I'll rewire it tomorrow.  Thank you very much Mica and make sure that you tell Ron that I said thanks as well.  You all are awesome.
 
btw, If anyone is cruising these boards wondering if they should buy an Alembic or not I'ld just like to point out the fact that not only will you be buying one of the finest instruments ever made but you're also buying from the type of people who don't mind getting the builders to correct your wiring schematics on a New Years Eve.
 
Thanks again, you all are really the best!

[lothartu]

Ok, I've just rewired it.  Everything works fine now but I think there was one correction needed.  Bridge Out should really connect to 2 and not 6 otherwise it gives you bridge out stereo when in mono mode and no bridge out at all in stereo mode.
 
So it should read
 
4 from bridge  
1 from neck  
2 bridge out  
3 neck / mono out  
1 resistor 5 (20kOhm)  
5 resistor 6 (20kOhm)  
 
Again ty for all your help.  Now I'm off to build a new instrument cable for my Series I; poor soldering skills be damned.  

[lothartu]

just in case my picture for the DPDT switch ever goes the way of the do-do and someone in the future uses this thread as a reference; the pin numbering system I used was this....
 
DPDT
 
1 2
3 4
5 6