Synth-DIY Yahoo! Groups Archives

Thread

A-180.1 - replacing the solder bridge

2017-05-26 by nicholas.buckley@ntlworld.com

Hi everyone,

No luck over at Wigglers so I thought I should try here.

I've acquired a standard 2 x 1:4 A-180-1 which I would like to convert to a 1 x 1:8 by reinstating the solder bridge.

I just want to make sure that I know exactly what I'm soldering and, more importantly, what I'm not...

My gut feeling is that I should solder a fine wire loop between the pair of tiny holes ( the red ring in my picture ) and, at the same time, ensure that no new solder comes into contact with either of the solder points circled in blue.

The image is here. Sorry, I'm not sure how/if i can upload directly into a Yahoo group message:

https://www.muffwiggler.com/forum/userpix2/15010_a1801_solder_bridge_1.jpg

If you've done this yourself, please could you confirm my thinking or correct me, as necessary.

Best wishes to all.

Nick,
Cardiff,
UK

Re: [Doepfer_a100] A-180.1 - replacing the solder bridge

2017-05-27 by Jacco Ville

Hi Nick,

This must be an old pcb rev. 
I looked it up but both my A180-1s and A180-2s (and I got a lot of them) have another pcb  layout. 
Very clear two solder bulbs very close to each other, can't miss. 
Can't help you herewith, buy a new one for 30£ ? 

Good luck and cheers

Jacco 
The Netherlands 

Sent from my IPhone.

Show quoted textHide quoted text

> Op 26 mei 2017 om 18:43 heeft nicholas.buckley@ntlworld.com [Doepfer_a100] <Doepfer_a100@yahoogroups.com> het volgende geschreven:
> 
> Hi everyone,
> 
> No luck over at Wigglers so I thought I should try here.
> 
> I've acquired a standard 2 x 1:4 A-180-1 which I would like to convert to a 1 x 1:8 by reinstating the solder bridge.
> 
> I just want to make sure that I know exactly what I'm soldering and, more importantly, what I'm not...
> 
> My gut feeling is that I should solder a fine wire loop between the pair of tiny holes ( the red ring in my picture ) and, at the same time, ensure that no new solder comes into contact with either of the solder points circled in blue.
> 
> The image is here. Sorry, I'm not sure how/if i can upload directly into a Yahoo group message:
> 
> https://www.muffwiggler.com/forum/userpix2/15010_a1801_solder_bridge_1.jpg
> 
> If you've done this yourself, please could you confirm my thinking or correct me, as necessary.
> 
> Best wishes to all.
> 
> Nick,
> Cardiff,
> UK
> 
>

Re: [Doepfer_a100] A-180.1 - replacing the solder bridge

2017-05-27 by nicholas.buckley@ntlworld.com

Hi Jacco,

Thanks for that.

You highlighted a key issue with my original post - this is an original A-180, not a re-badged A-180.1 so that probably explains the earlier PCB layout.

It was clearly sold originally as a 2 x 1:4 because there is no black line on the panel between jacks 4 & 5.

I deliberately got a cheap, second-hand one in case I made a mistake when re-instating the solder bridge.

It will also be easy for me to remember that the ( one and only ) A-180 will be my 1 x 1:8 and my other A-180-1's will be the 2 x 1:4's.

Looking at actual track on the PCB ( in two halves at the moment ) one ends at a solder point and the other ends at one of the pair of tiny holes so I think that these two need to be joined with a new bridge.

From the bodies of each jack, it's difficult to tell which two are the Tip and Sleeve and which two are just legs.

Cheers,

Nick

Re: [Doepfer_a100] A-180.1 - replacing the solder bridge

2017-05-27 by Jacco Ville

Hi Nick,

Within the modular world it's not an luxury to have a multimeter. 
In that case solving the routing of the pcb is a breeze. 

I soldered one of my A180-2s and used a black marker between the 4 and 5th jack. 

Maybe Dieter has the right answer to your pcb thing. 

Cheers 

Jacco

Sent from my IPhone.

Show quoted textHide quoted text

> Op 27 mei 2017 om 14:09 heeft nicholas.buckley@ntlworld.com [Doepfer_a100] <Doepfer_a100@yahoogroups.com> het volgende geschreven:
> 
> Hi Jacco,
> 
> Thanks for that.
> 
> You highlighted a key issue with my original post - this is an original A-180, not a re-badged A-180.1 so that probably explains the earlier PCB layout.
> 
> It was clearly sold originally as a 2 x 1:4 because there is no black line on the panel between jacks 4 & 5.
> 
> I deliberately got a cheap, second-hand one in case I made a mistake when re-instating the solder bridge.
> 
> It will also be easy for me to remember that the ( one and only ) A-180 will be my 1 x 1:8 and my other A-180-1's will be the 2 x 1:4's.
> 
> Looking at actual track on the PCB ( in two halves at the moment ) one ends at a solder point and the other ends at one of the pair of tiny holes so I think that these two need to be joined with a new bridge.
> 
> From the bodies of each jack, it's difficult to tell which two are the Tip and Sleeve and which two are just legs.
> 
> Cheers,
> 
> Nick
> 
>

Re: [Doepfer_a100] A-180.1 - replacing the solder bridge

2017-05-27 by nicholas.buckley@ntlworld.com

Ha ha Jacco, multimeter - why didn't i think of that

Another recommendation is a good magnifying glass - on the 'inner' face of the PCB I can just make out "JPR" by the two holes. I wonder if any jumper was ever supplied with this early version of the A-180 ?

No real surprise I guess that it is the two holes that need to be bridged.

A ten minute job in my workshop and now I have a fully functioning 1 x1:8 multiple. A very efficient way to distribute clock pulses from my A-154.

Cheers,

Nick